The Kynix Components

AD603 IntroductionThe AD603 is a low noise, voltage-controlled amplifier for use in  RF  and IF  AGC  systems. It provides accurate, pin-selectable gains of −11 dB to +31 dB with a bandwidth of 90 MHz or +9 dB to 51+ dB with a bandwidth of 9 MHz. Any intermediate gain range may be arranged using one external resistor. The input-referred noise spectral density is only 1.3 nV/√Hz, and power consumption is 125 mW at the recommended ±5 V supply.CatalogAD603 IntroductionAD603 FeaturesAD603 Pin Configuration and FunctionsAD603 Functional Block DiagramAD603 Working ModesAD603 Functional EquivalentsAD603 Package OutlineAD603 Typical ApplicationAD603 ApplicationsAD603 Application NoteComponent DatasheetFAQOrdering & QuantityAD603 FeaturesLinear-in-dB gain controlPin-programmable gain ranges:  −11 dB to +31 dB with 90 MHz bandwidth                                                              9 dB to 51 dB with 9 MHz bandwidthAny intermediate range, for example,  −1 dB to +41 dB with 30 MHz bandwidthBandwidth independent of the variable gain1.3 nV/√Hz input noise spectral density6 ±0.5 dB typical gain accuracyAD603 Pin Configuration and Functions                                    AD603 Functional Block DiagramFigure 1 AD603 functional block diagramIt is not difficult to find that it is different from AD600 in that: the fixed gain amplifier it uses can change the gain value. The gain GF is determined by the connection form of VOUT and FDBK. When VOUT and FDBK are short-circuited, GF=31.07dB; when it is open, GF=51.07dB; connect resistor REXT between VOUT and FDBK to set GF Any value between 31.07dB~51.07dB. However, the gain accuracy in this mode is reduced. When the external resistance is about 2K, the error is the largest. If an appropriate resistor is connected between VOUT and COMM, the gain can be increased, up to 60dB.AD603 Working ModesAD603 has three working modes:Mode 1: Short-circuit VOUT and FDBK, this connection can obtain the maximum bandwidth-90 MHz, and the gain range is -11.07dB~+31.07dB. As shown in Figure 2.Figure 2 Short connection between VOUT and FDBKMode 2: Connect a resistor REXT between VOUT and FDBK, and a 5.6pF capacitor between FDBK and COMM as frequency compensation. According to the relational expression of the amplifier, selecting the appropriate REXT value can obtain different gain range values. When REXT=2.15K ohms, the gain range is: -1dB~+41dB. As shown in Figure 3.Figure 3 VOUT and FDBK access resistance REXTMode 3: Open a circuit between VOUT and FDBK, and connect an 18pF capacitor between VOUT and COMM to extend the frequency response range. This mode is a high gain mode with a gain range of 8.93dB~51.07dB and a bandwidth of 9MHz. As shown in Figure 4.Figure 4 High gain modeIn the above three modes, the relationship between gain GF and control voltage VG is shown in Figure 5.Figure 5 The relationship between gain GF and control voltage VGWhen VG is in the range of -500mV~+500mV at 40dB/V (that is 25mV/dB, which is different from AD600's 32mV/dB) for linear gain control, the relationship between gain G (dB) and VG (V) is: G =40VG+Goi(I=1, 2, 3), where VG=VPOS-VNEG. G0i is the different gain constants in three modes. Mode 1: GOi=10dB; Mode 2: GOi=10dB~30dB (determined by the external resistor REXT); Mode 3: GOi=30dB.When the control voltage VG is outside -500mV~+500mV, the gain G and VG no longer satisfy the linear relationship. When VG=-526mV, the gain is G=GF-42.14, when VG=+526, the gain is G= GF.AD603 Typical ApplicationFigure 6 AD603 typical application circuitFigure 6 is a two-stage AD603 amplifier circuit with automatic gain control. In the figure, Q1 and R8 form a detector to detect changes in the amplitude of the output signal. The automatic gain control voltage  VAGC is formed by CAV, the difference between the current Q2 and the collector current of Q1 flowing into the capacitor CAV, and its magnitude changes with the amplitude of the output signal of A2, which makes it added to A1 and A2 amplifier 1. The automatic gain control voltage  VAGC of the pin changes with the output signal amplitude change, so as to achieve the purpose of automatically adjusting the amplifier gain.AD603 Functional EquivalentsAD603 Package OutlineAD603 ApplicationsRF/IF AGC amplifiersVideo gain controlsA/D range extensionsSignal measurementsAD603 Application Note(1) The power supply voltage should generally be selected as ±5V, and the maximum should not exceed ±7.5V. (2) In the case of a ±5V power supply, the effective value of the rated voltage applied to the input terminal VINP should be 1V, the peak value is ±1.4V, and the maximum should not exceed ±2V. If you want to expand the measurement range, you should add a level of attenuation in front of AD603. In this way, the typical value of the peak output voltage can reach ±3.0V. Therefore, it is usually necessary to add a first level of amplification after AD603 to connect to the A/D converter. (3) The voltage applied to the voltage control terminal must be very stable, otherwise, the gain will be unstable, which will increase the noise of the amplified signal. (4) The signal must be directly connected to pin 4 of the amplifier, otherwise, the accuracy of the amplifier will be reduced due to the large impedance.Component DatasheetAD603 DatasheetFAQWhat is AD603?AD603 is a low-noise, voltage-controlled amplifier for radio frequency (RF) and intermediate frequency (IF) automatic gain control (AGC) systems. It provides precise pin-selectable gain, with a gain range of -11 dB to +31 dB at 90 MHz bandwidth, and a gain range of +9 dB to +51 dB at 9 MHz bandwidth. Any intermediate gain range can be obtained with an external resistor. The noise spectral density referred to the input is only 1.3 nV/√Hz, and the power consumption is 125mW when using the recommended ±5 V power supply.What are the problems that need to be paid attention to when using AD603?The voltage cannot be too high. Generally, the voltage is plus or minus 5V, and the maximum voltage cannot exceed plus or minus 7.5V. The output voltage cannot exceed 2V.How to solve the self-oscillation problem of AD603?For high-frequency operational amplifiers, the following points are the basic ways to solve self-excitation.The power supply is stable and no ripple.The electrical connection wires are as short as possible.The ad603 circuit should be far away from the power circuit, especially away from the transformer.The power transformer and the circuit board of ad603 should be shielded with a metal box and grounded if possible.One point is very important. For op amps, too large magnification can easily cause self-excitation, so reduce the magnification as much as possible and minimize the number of magnification levels (generally not greater than 4).Reverse amplification can suppress self-excitation in multi-stage amplification.If you want to connect to the power amplifier and then amplify, it is best to use two power supplies, and the circuit should be connected to the same ground.What is the difference between AD603AQ and AD603AR?Their differences are in model, Temperature, Package.AD603AQ -40°C to +85°C 8-Lead CERDIPAD603AR -40°C to +85°C 8-Lead SOIC_NAfter inputting an AC signal and being amplified by AD603, why does the output contain a DC signal? How to eliminate the DC signal?When the DC blocking capacitor is not used, the bias voltage of the input circuit needs to be adjusted for compensation.If the DC voltage of the AC signal is not fixed, only a DC blocking capacitor can be used, or the average value can be used to eliminate it after sampling the number.

Product Overview This 24-bit I/0 expander for the two-line bidirectional bus (|2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)].   The major benefit of this device is its wide Vcc range. It can operate from 1.65 V to 5.5 V on the P-port side and on the SDA/SCL side. This allows the TCA6424A to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to the dropping power supplies of microprocessors and microcontrollers, some PCB components, such as LEDs, remain at a 5-V power supply.   This blog will introduce TCA6424ARGJR systematically from its features, pinout to its specifications, applications, also including TCA6424ARGJR datasheet and so much more.   Catalog Product Overview TCA6424ARGJR Features TCA6424ARGJR Pinout TCA6424ARGJR CAD Models TCA6424ARGJR Circuit Diagram TCA6424ARGJR Functional Block Diagram TCA6424ARGJR Package TCA6424ARGJR Specification TCA6424ARGJR Manufacturer TCA6424ARGJR Datasheet Using Warnings TCA6424ARGJR FAQ   TCA6424ARGJR Features Operating Power-Supply Voltage Range of 1.65 Vto 5.5 VAllows Bidirectional Voltage-Level Translation andGPIO Expansion Between: - 1.8-V SCL /SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port - 2. 5-V SCL/SDA and 1. 8-V, 2.5-V, 3.3-V, or 5-V P Port . - 3.3-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port - 5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port I2C to Parallel Port ExpanderLow Standby Current Consumption of 1 μASchmitt- Trigger Action Allows Slow InputTransition and Better Switching Noise Immunity at the SCL and SDA Inputs - Vhys=0.18V Typat 1.8 V -Vhys=0.25 V Typ at2.5 V -Vhys=0.33 V Typ at3.3 V -Vhys=0.5 V Typat5 V 5-VTolerant I/O Ports Active-Low Reset Input (RESET)Open-Drain Active-Low Interrupt Output (INT)400-kHz Fast 2C BusInput/Output Configuration RegisterPolarity Inversion RegisterInternal Power-On ResetPower Up With All Channels Configured as InputsNo Glitch On Power UpNoise Filter on SCL /SDA InputsLatched Outputs With High-Current DriveMaximum Capability for Directly Driving LEDsLatch-Up Performance Exceeds 100 mA PerJESD 78, Class II ESD Protection Exceeds JESD 22 -2000-V Human-Body Model (A114-A) -200-V Machine Model (A115-A) -1000-V Charged-Device Model (C101)   TCA6424ARGJR Pinout The following figure is the diagram of TCA6424ARGJR pinout.   TCA6424ARGJR Pinout   TCA6424ARGJR CAD Models The following are TCA6424ARGJR Symbol, Footprint, and 3D Model.   TCA6424ARGJR Symbol   TCA6424ARGJR Footprint   TCA6424ARGJR 3D Model   TCA6424ARGJR Circuit Diagram The following figure shows an application in which the TCA6424A can be used.   Typical Application   Device address configured as 0100000 for this example.P00 and P02–P10 are configured as inputs.P01, P11–P17, and P20–P27 are configured as outputs.Resistors are required for inputs (on P port) that may float. If a driver to an input will not let the input float, a resistor isnot needed. Outputs (in the P port) do not need pullup resistors.   When the I/Os are used to control LEDs, normally they are connected to VCC through a resistor as shown in the following figure. The LED acts as a diode so, when the LED is off, the I/O VIN is about 1.2 V less than VCC. The ΔICC parameter in Electrical Characteristics shows how ICC increases as VIN becomes lower than VCC. Designs that must minimize current consumption, such as battery power applications, should consider maintaining the I/O pins greater than or equal to VCC when the LED is off.   High-Value Resistor in Parallel With the LED   TCA6424ARGJR Functional Block Diagram The following figure shows the functional block diagram of TCA6424ARGJR.   TCA6424ARGJR Functional Block Diagram   All I/Os are set to inputs at reset.Pin numbers shown are for the RGJ package.   TCA6424ARGJR Package The following diagram shows the TCA6424ARGJR package.   TCA6424ARGJR Package   NOTES: All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M.This drawing is subject to change without notice.The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance.   TCA6424ARGJR Specification Product AttributeAttribute ValueManufacturer:Texas InstrumentsProduct Category:Interface - I/O ExpandersNumber of I/Os:24 I/OInterface Type:I2C, Serial, SMBusMaximum Clock Frequency:400 kHzOperating Supply Voltage:1.65 V to 5.5 VMinimum Operating Temperature:- 40 CMaximum Operating Temperature:+ 85 CMounting Style:SMD/SMTPackage / Case:UQFN-32Packaging:ReelPackaging:Cut TapePackaging:MouseReelBrand:Texas InstrumentsFeatures:Configuration Registers, Interrupt Pin, Reset PinInput Voltage:5.5 VLogic Family:TCA6424A   TCA6424ARGJR Manufacturer Texas Instruments Incorporated (TI) is a global semiconductor design and manufacturing company that develops analog ICs and embedded processors. By employing the world's brightest minds, TI creates innovations that shape the future of technology. TI is helping more than 100,000 customers transform the future, today.   TCA6424ARGJR Datasheet You can download TCA6424ARGJR datasheet from the link given below: TCA6424ARGJR Datasheet   Using Warnings Note: Please check their parameters and pin configuration before replacing them in your circuit.   TCA6424ARGJR FAQ What is the Vcc range of the TCA6424A? 1.65 V to 5.5 V.   What is the major benefit of the 24-bit I/0 expander? Vcc range.   What PCB components remain at a 5-V power supply? LEDs.   How does I2C expander work? The first interrupt is a 3-byte I2C transaction from the host MCU. The target device will decode the three bytes into the command, data select, and data bytes, and set or read the appropriate values on the 8-bit expanded IO port. Those values will be updated in the GUI, and the program will return to low-power mode 0.   What are I/O expander? General-purpose input/output (GPIO) expanders are a simple, cost-effective way to monitor and control several peripheral signals. They make it easy for designers to add extra I/O to their design and thereby free up the microprocessor's GPIO for other, more important functions.

CatalogProduct OverviewRelated Video InstrctionMS5611-01BA03 PinoutMS5611-01BA03 FeaturesTypical Performance CharacteristicsMS5611-01BA03 AttributesMS5611-01BA03 Breakout BoardMS5611-01BA03 ArduinoFunctional DescriptionMounting and Assembly ConsiderationsUsing WarningFAQ Product OverviewThe MS5611-01BA  is a new generation of high-resolution altimeter sensors from MEAS Switzerland with SPI and I²C bus interface. This barometric pressure sensor is optimized for altimeters and variometers with an altitude resolution of 10 cm. The sensor module includes a high linearity pressure sensor and an ultra-low power 24 bit ΔΣ ADC with internal factory calibrated coefficients. It provides a precise digital 24 Bit pressure and temperature value and different operation modes that allow the user to optimize for conversion speed and current consumption. A high resolution temperature output allows the implementation of an altimeter/thermometer function without any additional sensor. The MS5611-01BA can be interfaced to virtually any microcontroller. The communication protocol is simple, without the need of programming internal registers in the device. Small dimensions of only 5.0 mm x 3.0 mm and a height of only 1.0 mm allow for integration in mobile devices. This new sensor module generation is based on leading MEMS technology and the latest benefits from MEAS Switzerland proven experience and know-how in high volume manufacturing of altimeter modules, which have been widely used for over a decade. The sensing principle employed leads to very low hysteresis and high stability of both pressure and temperature signal. Related Video InstrctionVideo: MS5611-01BA01 high resolution pressure sensor with Arduino and ProcessingMS5611 Video Description: This are the results of my first developments on the MS5611-01BA01 used with Arduino and Processing. MS5611-01BA03 PinoutFigure: MS5611-01BA03 Pinout MS5611-01BA03 FeaturesMobile altimeter / barometer systemsBike computersVariometersHeight sensing for medical alarmsIndoor navigation Typical Performance Characteristics Figure: Typical Performance Characteristics MS5611-01BA03 AttributesProduct AttributeAttribute ValueSource Content uid:MS5611-01BA03Manufacturer Part Number:MS5611-01BA03Part Life Cycle Code:ActiveIhs Manufacturer:TE CONNECTIVITY LTDManufacturer:TE ConnectivityRisk Rank:5.81Body Breadth:3 mmBody Height:1 mmBody Length or Diameter:4.7 mmMounting Feature:SURFACE MOUNTNumber of Bits:24Operating Current-Max:0.0125 mAOperating Temperature-Max:85 °COperating Temperature-Min:-40 °COutput Interface Type:I2C INTERFACEOutput Range:0.60-2.40VOutput Type:DIGITAL VOLTAGEPackage Shape/Style:RECTANGULARPressure Range-Max:17.404 PsiPressure Range-Min:0.145 PsiPressure Sensing Mode:BAROMETRICResponse Time:8220 µsSensors/Transducers Type:PRESSURE SENSOR,PIEZORESISTIVESupply Voltage-Max:3.6 VSupply Voltage-Min:1.8 V MS5611-01BA03 Breakout BoardFigure: Breakout Board MS5611-01BA03 ArduinoThere are several ready-made modules with MS5611 sensors on the market, which differ mainly in the level of the supply voltage. Most often these are modules powered by 3.3V. In my case, I will use the IMU GY-86 module, which can be powered by both 5V and 3.3V. If we decide to supply 5V, pay special attention to connecting to the appropriate pin, connecting to the pin marked 3.3V may damage it. The pin marked SCL  ( adapter ) is connected to the A5 pin ( Arduino ), and the SDA pin(adapter) to pin A4 ( Arduino ). Let's not forget about the GND mass as well. Functional DescriptionGENERALThe MS5611-01BA consists of a piezo-resistive sensor and a sensor interface IC. The main function of the MS5611-01BA  is to convert the uncompensated analogue output voltage from the piezo-resistive pressure sensor to a 24-bit digital value, as well as provide a 24-bit digital value for the temperature of the sensor. FACTORY CALIBRATIONEvery module is individually factory calibrated at two temperatures and two pressures. As a result, 6 coefficients necessary to compensate for process variations and temperature variations are calculated and stored in the 128-bit PROM of each module. These bits (partitioned into 6 coefficients) must be read by the microcontroller software and used in the program converting D1 and D2 into compensated pressure and temperature values. SERIAL INTERFACEThe MS5611-01BA has built-in two types of serial interfaces:  SPI and I2C. Pulling the Protocol Select pin PS to low selects the SPI protocol, pulling PS to high activates the I2C bus protocol. SPI MODEThe external microcontroller clocks in the data through the input SCLK (Serial CLocK) and SDI (Serial Data In). In the SPI mode module can accept both mode 0 and mode 3 for the clock polarity and phase. The sensor responds on the output SDO (Serial Data Out). The pin CSB (Chip Select) is used to enable/disable the interface so that other devices can talk on the same SPI bus. The CSB pin can be pulled high after the command is sent or after the end of the command execution (for example end of conversion). The best noise performance from the module is obtained when the SPI bus is idle and without communication to other devices during the ADC conversion. I²C MODE The external microcontroller clocks in the data through the input SCLK (Serial CLocK) and SDA (Serial DAta). The sensor responds on the same pin SDA which is bidirectional for the I2C  bus interface. So this interface type uses only 2 signal lines and does not require a chip select, which can be favorable to reduce board space.  In I2C  -Mode the complement of the pin CSB (Chip Select) represents the LSB of the I2C  address. It is possible to use two sensors with two different addresses on the I2C  bus. The pin CSB shall be connected to VDD or GND (do not leave unconnected!). COMMANDS The MS5611-01BA has only five basic commands: 1. Reset 2. Read PROM (128 bit of calibration words) 3. D1 conversion  4. D2 conversion 5. Read ADC result (24 bit pressure/temperature) Mounting and Assembly ConsiderationsSOLDERING Please refer to the application note AN808 available on our website for all soldering issues. MOUNTING The MS5611-01BA can be placed with automatic Pick & Place equipment using vacuum nozzles. It will not be damaged by the vacuum. Due to the low stress assembly, the sensor does not show pressure hysteresis effects. It is important to solder all contact pads. CONNECTION TO PCB The package outline of the module allows the use of a flexible PCB for interconnection. This can be important for applications in watches and other special devices. CLEANING The MS5611-01BA has been manufactured under cleanroom conditions. It is therefore recommended to assemble the sensor under class 10’000 or better conditions. Should this not be possible, it is recommended to protect the sensor opening during assembly from entering particles and dust. To avoid cleaning of the PCB, a solder paste of type “no-clean” shall be used. Cleaning might damage the sensor! ESD PRECAUTIONS The electrical contact pads are protected against ESD up to 4 kV HBM (human body model). It is therefore essential to ground machines and personnel properly during assembly and handling of the device. The MS5611-01BA is shipped in antistatic transport boxes. Any test adapters or production transport boxes used during the assembly of the sensor shall be of equivalent antistatic material. DECOUPLING CAPACITOR Particular care must be taken when connecting the device to the power supply. A 100 nF ceramic capacitor must be placed as close as possible to the  MS5611-01BA VDD pin. This capacitor will stabilize the power supply during data conversion and thus, provide the highest possible accuracy. Using WarningPlease check their parameters and pin configuration before replacing them in your circuit. FAQWhat allows the implementation of an altimeter/thermometer function without any additional sensor?High resolution temperature output. How long has the MS5611-01BA been widely used?Over a decade. What module can be powered by both 5V and 3.3V?IMU GY-86 module What two types of serial interfaces does the MS5611-01BA have?SPI and I2C How is each module calibrated?Factory calibrated at two temperatures and two pressures. What does the MS5611-01BA allow the user to optimize for?Conversion speed and current consumption. What is the MS5611-01BA interfaced to?Virtually any microcontroller. What is the height of the MS5611-01BA?1.0 mm. What does the MS5611-01BA consist of?A piezo-resistive sensor and a sensor interface IC. What digital value does the MS5611-01BA convert the uncompensated analogue output voltage from the piezo-resistive?24-bit. 

CatalogProduct OverviewATMEGA2560-16AU Related Video IntroductionATMEGA2560-16AU CAD ModelsATMEGA2560-16AU Pin ConfigurationATMEGA2560-16AU Block DiagramATMEGA2560-16AU FeaturesATMEGA2560-16AU DatasheetATMEGA2560-16AU SpecificationsATMEGA2560-16AU ManufacturerUsing WarningATMEGA2560-16AU FAQ Product OverviewThe ATmega640/1280/1281/2560/2561 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega640/1280/1281/2560/2561 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. ATMEGA2560-16AU Related Video IntroductionVideo Description: Geekcreit® MEGA 2560 R3 ATmega2560-16AU MEGA2560 Development Board With USB Cable For Arduino ATMEGA2560-16AU CAD ModelsFigure: ATMEGA2560-16AU PCB Symbol  Figure: ATMEGA2560-16AU Footprint   Figure: ATMEGA2560-16AU 3D Models ATMEGA2560-16AU Pin ConfigurationFigure: ATMEGA2560-16AU Pin ConfigurationNote: The large center pad underneath the QFN/MLF package is made of metal and internally connected to GND. It should be soldered or glued to the board to ensure good mechanical stability. If the center pad is left unconnected, the package might loosen from the board. ATMEGA2560-16AU Block DiagramFigure: ATMEGA2560-16AU Block Diagram The AVR® core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. The ATmega640/1280/1281/2560/2561 provides the following features: 64K/128K/256K bytes of In-System Programmable Flash with Read-While-Write capabilities, 4Kbytes EEPROM, 8Kbytes SRAM, 54/86 general purpose I/O lines, 32 general purpose working registers, Real Time Counter (RTC), six flexible Timer/Counters with compare modes and PWM, four USARTs, a byte oriented 2-wire Serial Interface, a 16-channel, 10-bit ADC with optional differential input stage with programmable gain, programmable Watchdog Timer with Internal Oscillator, an SPI serial port, IEEE® std. 1149.1 compliant JTAG test interface, also used for accessing the On-chip Debug system and programming and six software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip functions until the next interrupt or Hardware Reset. In Power-save mode, the asynchronous timer continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except Asynchronous Timer and ADC, to minimize switching noise during ADC conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption. In Extended Standby mode, both the main Oscillator and the Asynchronous Timer continue to run. Microchip offers the QTouch® library for embedding capacitive touch buttons, sliders and wheels functionality into AVR microcontrollers. The patented charge-transfer signal acquisition offersrobust sensing and includes fully debounced reporting of touch keys and includes Adjacent Key Suppression® (AKS®) technology for unambiguous detection of key events. The easy-to-use QTouch Suite toolchain allows you to explore, develop and debug your own touch applications. The device is manufactured using the Microchip high-density nonvolatile memory technology. The On-chip ISP Flash allows the program memory to be reprogrammed in-system through an SPI serial interface, by a conventional nonvolatile memory programmer, or by an On-chip Boot program running on the AVR core. The boot program can use any interface to download the application program in the application Flash memory. Software in the Boot Flash section will continue to run while the Application Flash section is updated, providing true ReadWhile-Write operation. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip, the ATmega640/1280/1281/2560/2561 is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded control applications. The ATmega640/1280/1281/2560/2561 AVR is supported with a full suite of program and system development tools including: C compilers, macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits. ATMEGA2560-16AU FeaturesHigh Performance, Low Power AVR® 8-Bit MicrocontrollerAdvanced RISC Architecture– 135 Powerful Instructions – Most Single Clock Cycle Execution– 32 × 8 General Purpose Working Registers– Fully Static Operation– Up to 16 MIPS Throughput at 16MHz– On-Chip 2-cycle MultiplierHigh Endurance Non-volatile Memory Segments– 64K/128K/256KBytes of In-System Self-Programmable Flash– 4Kbytes EEPROM– 8Kbytes Internal SRAM– Write/Erase Cycles:10,000 Flash/100,000 EEPROM– Data retention: 20 years at 85°C/ 100 years at 25°C– Optional Boot Code Section with Independent Lock BitsIn-System Programming by On-chip Boot ProgramTrue Read-While-Write Operation– Programming Lock for Software SecurityEndurance: Up to 64Kbytes Optional External Memory SpaceQTouch® library support– Capacitive touch buttons, sliders and wheels– QTouch and QMatrix acquisition– Up to 64 sense channelsJTAG (IEEE® std. 1149.1 compliant) Interface– Boundary-scan Capabilities According to the JTAG Standard– Extensive On-chip Debug Support– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG InterfacePeripheral Features– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode– Four 16-bit Timer/Counter with Separate Prescaler, Compare- and Capture Mode– Real Time Counter with Separate Oscillator– Four 8-bit PWM Channels– Six/Twelve PWM Channels with Programmable Resolution from 2 to 16 Bits(ATmega1281/2561, ATmega640/1280/2560)– Output Compare Modulator– 8/16-channel, 10-bit ADC (ATmega1281/2561, ATmega640/1280/2560)– Two/Four Programmable Serial USART (ATmega1281/2561, ATmega640/1280/2560)– Master/Slave SPI Serial Interface– Byte Oriented 2-wire Serial Interface– Programmable Watchdog Timer with Separate On-chip Oscillator– On-chip Analog Comparator– Interrupt and Wake-up on Pin ChangeSpecial Microcontroller Features– Power-on Reset and Programmable Brown-out Detection– Internal Calibrated Oscillator– External and Internal Interrupt Sources– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby,and Extended StandbyI/O and Packages– 54/86 Programmable I/O Lines (ATmega1281/2561, ATmega640/1280/2560)– 64-pad QFN/MLF, 64-lead TQFP (ATmega1281/2561)– 100-lead TQFP, 100-ball CBGA (ATmega640/1280/2560)– RoHS/Fully GreenTemperature Range:– -40℃ to 85℃ IndustrialUltra-Low Power Consumption– Active Mode: 1MHz, 1.8V: 500µA– Power-down Mode: 0.1µA at 1.8VSpeed Grade:– ATmega640V/ATmega1280V/ATmega1281V:0 - 4MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V– ATmega2560V/ATmega2561V:0 - 2MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V– ATmega640/ATmega1280/ATmega1281:0 - 8MHz @ 2.7V - 5.5V, 0 - 16MHz @ 4.5V - 5.5V– ATmega2560/ATmega2561:0 - 16MHz @ 4.5V - 5.5V ATMEGA2560-16AU DatasheetYou can download the datasheet from the link given below:ATMEGA2560-16AU Datasheet ATMEGA2560-16AU SpecificationsTypeDescriptionCategoryIntegrated Circuits (ICs)Embedded - MicrocontrollersMfrMicrochip TechnologySeriesAVR® ATmegaPackageTrayPart StatusActiveCore ProcessorAVRCore Size8-BitSpeed16MHzConnectivityEBI/EMI, I²C, SPI, UART/USARTPeripheralsBrown-out Detect/Reset, POR, PWM, WDTNumber of I/O86Program Memory Size256KB (128K x 16)Program Memory TypeFLASHEEPROM Size4K x 8RAM Size8K x 8Voltage - Supply (Vcc/Vdd)4.5V ~ 5.5VData ConvertersA/D 16x10bOscillator TypeInternalOperating Temperature-40°C ~ 85°C (TA)Mounting TypeSurface MountPackage / Case100-TQFPSupplier Device Package100-TQFP (14x14)Base Product NumberATMEGA2560 ATMEGA2560-16AU ManufacturerMicrochip Technology Inc. is a publicly-listed American corporation that manufactures microcontroller, mixed-signal, analog and Flash-IP integrated circuits. Its products include microcontrollers (PIC, dsPIC, AVR and SAM), Serial EEPROM devices, Serial SRAM devices, embedded security devices, radio frequency (RF) devices, thermal, power and battery management analog devices, as well as linear, interface and wireless products. Using WarningNote: Please check their parameters and pin configuration before replacing them in your circuit. ATMEGA2560-16AU FAQWhat is ATmega2560 microcontroller?The ATmega2560 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega2560 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. What is 8 bit AVR microcontroller?Microchip Technology ATmega328 8-bit AVR® Microcontrollers (MCUs) are high-performance RISC-based devices that combine 32KB ISP Flash memory with read-while-write capabilities, 1KB EEPROM, 2KB SRAM, 23 general-purpose I/O lines, 32 general-purpose working registers, serial programmable USART, and more. What is a microcontroller and what does it do?A microcontroller is embedded inside of a system to control a singular function in a device. It does this by interpreting data it receives from its I/O peripherals using its central processor. Devices often utilize multiple microcontrollers that work together within the device to handle their respective tasks. 

Product Overview The AD8605 are single, dual, and quad rail-to-rail input and output, single-supply amplifiers. They feature very low offset voltage, low input voltage and current noise, and wide signal bandwidth. They use the Analog Devices, Inc. patented DigiTrim® trimming technique, which achieves superior precision without laser trimming.   This blog will introduce AD8605ARTZ systematically from its features, pinout to its specifications, applications, also including AD8605ARTZ datasheet and so much more.   Catalog Product Overview AD8605ARTZ Features AD8605ARTZ Pinout AD8605ARTZ Applications AD8605ARTZ CAD Models AD8605ARTZ Circuit Diagram AD8605ARTZ Package AD8605ARTZ Specification AD8605ARTZ Manufacturer AD8605ARTZ Datasheet Using Warnings AD8605ARTZ FAQ   AD8605ARTZ Features Low offset voltage: 65 μV maximumLow input bias currents: 1 pA maximumLow noise: 8 nV/√HzWide bandwidth: 10 MHzHigh open-loop gain: 1000 V/mVUnity gain stableSingle-supply operation: 2.7 V to 5.5 V   AD8605ARTZ Pinout The following figure is the diagram of AD8605ARTZ pinout.   AD8605ARTZ Pinout   AD8605ARTZ Applications Photodiode amplificationBattery-powered instrumentationMultipole filtersSensorsBarcode scannersAudio   AD8605ARTZ CAD Models The following are AD8605ARTZ Symbol, Footprint, and 3D Model.   AD8605ARTZ Symbol   AD8605ARTZ Footprint   AD8605ARTZ 3D Model   AD8605ARTZ Circuit Diagram The following are the circuit diagrams of AD8605ARTZ.   Difference Amplifier, AV = 10   Simplified Circuit of the DAC8143 with AD8605Output Buffer   Equivalent Circuit for Photodiode Preamp    AD8605ARTZ Package The following diagram shows the AD8605ARTZ package.   AD8605ARTZ Package   AD8605ARTZ Specification Product AttributeAttribute ValueManufacturer:Analog Devices Inc.Product Category:Precision AmplifiersSeries:AD8605Number of Channels:1 ChannelGBP - Gain Bandwidth Product:10 MHzSR - Slew Rate:5 V/usCMRR - Common Mode Rejection Ratio:100 dBOutput Current per Channel:80 mAIb - Input Bias Current:250 pAVos - Input Offset Voltage:20 uVen - Input Voltage Noise Density:8 nV/sqrt HzSupply Voltage - Max:5.5 VSupply Voltage - Min:2.7 VOperating Supply Current:1 mAMinimum Operating Temperature:- 40 CMaximum Operating Temperature:+ 125 CShutdown:No ShutdownMounting Style:SMD/SMTPackage / Case:SOT-23-5Height:1.15 mmInput Voltage Range - Max:5 VLength:2.9 mmOperating Supply Voltage:2.7 V to 5.5 V   AD8605ARTZ Manufacturer Analog Devices has built one of the longest standing, highest growth companies within the technology sector utilizing cultural pillars such as innovation, performance, and excellence. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 100,000 customers, representing virtually all types of electronic equipment. Celebrating over 50 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' is included in the S&P 500 Index.   AD8605ARTZ Datasheet You can download AD8605ARTZ datasheet from the link given below: AD8605ARTZ Datasheet   Using Warnings Note: Please check their parameters and pin configuration before replacing them in your circuit.   AD8605ARTZ FAQ What is the output of an op-amp? An operational amplifier (op amp) is an analog circuit block that takes a differential voltage input and produces a single-ended voltage output. Op amps usually have three terminals: two high-impedance inputs and a low-impedance output port.   What are the types of operational amplifier? Op amps can be classified into 3 main types based on the input/output voltage range: Dual Supply, Single Supply, and Rail-to-Rail.   What are operational amplifiers used for? Op-amps are linear devices that are ideal for DC amplification and are used often in signal conditioning, filtering or other mathematical operations (add, subtract, integration and d3. 8. ifferentiation). The operational amplifier is arguably the most useful single device in analog electronic circuitry.   What are the basic components of operational amplifier? Operations amplifiers — op-amps for short, are integrated circuits, constructed mostly out of transistors and resistors. These integrated circuits multiply an input signal to a larger output. You can use these components with voltage and current in both DC and AC circuits.   What is the difference between amplifier and operational amplifier? Amplifiers can be either electronic or mechanical in common definition whereas operational amplifiers are electronic amplifiers. Amplifiers, in general, have a limited capability of amplifying DC signals but all op-amps are capable of amplifying DC signals.

I DescriptionDo you know the DC regulated power supply?DC regulated power supply is widely used in industrial production and daily life, and its design occupies a very important position in power supply technology.Therefore, based on the analysis of the problems of the traditional DC stabilized power supply, the method and calculation of each part of the 5 V, 1 A DC stabilized power supply based on L7805CT are described. Besides, it can also provide a 5 V DC power supply for counters, decoders, and digital tubes to realize addition and subtraction counting.The system circuit based on L7805CT introduced in this blog is simple, stable, easy to control, cost-effective, and is of high use-value.CatalogI DescriptionII IntroductionIII Design requirements for DC stabilized power supplyIV Hardware unit circuit design4.1 Overall structure of the power supply4.2 Component selectionV ApplicationVI ConclusionFAQOrdering & QuantityII IntroductionWith the continuous development of electronic technology, the design requirements of electronic equipment for power supply are getting higher and higher, from traditional requirements to high-quality, high-efficiency, and high-stability to meet the needs of objects.The normal operation of electronic devices requires DC power. DC power sources include solar batteries, accumulators, and dry batteries. But do you know which one is the most cost-effective? Of course, the most cost-effective method is to convert the AC power provided by the grid into the required DC power. Most electronic equipment uses this mode, and the three-terminal regulator is the most widely used.Although people use many types of DC stabilized power supplies with different functions, the principles are similar. The voltage regulator chip used in the system introduced in this blog is L7805CT. L7805CT has the advantages of small size, simple external wiring, stable operation and strong applicability. It can meet people's requirements in life, study, and work.III Design requirements for DC stabilized power supplyThe design requirements of the DC regulated single-channel power supply based on L7805CT are as follows:Input AC voltage 220 V;Output DC voltage +5 V;Output DC current 1 A;The output ripple of the circuit is less than 50 mV;The equivalent internal resistance is less than 0.15 Ω;Ripple coefficient is less than 0.002%;Voltage adjustment rate ≤0.001%;Voltage stabilization coefficient ≤0.005%.IV Hardware unit circuit design4.1 Overall structure of the power supplyThis design focuses on the knowledge and skills involved in the main links of the DC power supply, and completes the circuit design and production of 220 V AC input and 5 V, 1 A DC output.The DC power supply is usually composed of four links:Power Transformers;Rectifier circuit;Filter circuit;Regulator circuit .As shown in Figure 1.Figure 1. Block diagram of DC power supply4.1.1 Power transformerThe power transformer converts the high-voltage AC mains power into the appropriate voltage AC and sends it to the single-phase bridge rectifier circuit.When choosing a power transformer model, the parameters we need to consider are capacity and output voltage.4.1.2 Rectifier circuitThe rectifier circuit uses the unidirectional conductivity of the diode to complete the rectification. Commonly used rectifier circuits are as follows: single-phase half-wave rectifier circuit, single-phase full-wave rectifier circuit and single-phase bridge rectifier circuit.Through comparative research, in order to overcome the shortcomings of half-wave rectification, the L7805CT-based system uses a single-phase bridge rectifier circuit. It consists of 4 diodes VD1～VD4 connected in the form of a bridge. Whether it is a positive half-cycle or a negative half-cycle, the direction of the current flowing to the load RL is the same. Both transform the AC voltage output by the secondary winding of the power transformer into a pulsating DC voltage. The reverse voltage that each device bears is the peak value of the power supply voltage, and symmetrical current flows through the positive and negative half cycles of the transformer, the utilization rate is higher than that of the full-wave rectifier circuit, and the current ripple is reduced. Therefore, there is no unidirectional magnetization.4.1.3 Filter circuitThe rectified direct current contains a relatively large alternating current component, and the pulsation coefficient is relatively large, so it cannot be directly used as the power supply for electronic circuits. Filter circuits are commonly used to remove or reduce the AC component in the output voltage, so that pure AC power is used on the device.This design uses the energy storage characteristics of capacitors and inductors to set appropriate parameters.When the circuit voltage rises, the energy storage element stores energy.When the voltage drops, the energy storage element releases energy, so as to achieve the purpose of reducing pulsation.The capacity of the capacitor is related to the discharge time. To make the filtering effect better, a capacitor with a larger capacity can be used as the filter capacitor. The filter capacitor is generally selected as RLC≥(3～5)T/2.4.1.4 Voltage stabilizing circuitThe DC voltage obtained after the AC power is rectified and filtered often fluctuates with the fluctuation of the grid voltage, temperature changes, and load resistance changes. Then, the quality of power supply will be reduced, affecting the operation of the equipment. Therefore, a voltage stabilizing circuit needs to be added between the filter circuit and the load link to achieve the purpose of stabilizing power supply.The chip L7805CT has the characteristics of good voltage regulation performance, high reliability, easy installation and low cost. Therefore, the linear stabilized power supply replaces the discrete stabilized circuit and is widely used. In order to reduce the interference and make the voltage stabilizing circuit work normally, the input voltage should be at least 2.5~3V higher than the output voltage.4.2 Component selection4.2.1 Selection of power transformerConsidering the diode forward voltage drop, wire resistance, and power grid fluctuations, the output voltage UI of the three-terminal integrated regulator should meet: Where:Uomax is the maximum output of regulated power supply;(UI-UO) min is the minimum voltage difference between the input and output of the integrated regulator;ΔUI is the change of the input voltage caused by the fluctuation of the power grid (generally taken as 10% of the sum of UO, (UI-UO) min, and UIP).For the integrated three-terminal regulator, when (UI-UO) min=2～10V, it has better voltage regulation characteristics.When U1 = 10 VWhen U2 = 9 VIn a single-phase bridge rectifier circuit, the relationship between the transformer secondary winding current I2 and the capacitor filter output current II is:In summary, choose a transformer with a capacity of 15VA and 9V.4.2.2 Selection of rectifier diodeBecause, the current flowing through each rectifier diode in the bridge circuit is: The maximum reverse peak voltage of each rectifier diode is: In summary, select the transistor IN4001, its parameters are: ID=1A, URM=50V.4.2.3 Selection of filter capacitorAlthough the current passing through the diode is a pulsating current, because the capacitor C has an energy storage and discharge function, this reduces the degree of voltage pulsation across the load RL and increases the average value.The average value and smoothness of the DC voltage on the load are related to the discharge time constant τ=RLC. The larger the value of C or RL, the slower the discharge of C. The larger the output DC voltage value, the better the filtering effect; otherwise, the worse. Generally take:The AC power supply in some Asian countries is a 50Hz sine wave, with 50 identical waveforms per second. After full-wave rectification, both the positive and negative half waves become pulsating direct current in the same direction. At this time, there are 100 identical waveforms per second, that is, f=100Hz.So the filter capacitor capacity is:among them,The output DC voltage of the capacitor filter circuit is estimated as:In summary, two electrolytic capacitors of 2200μF and 50V can be used, and they are connected in parallel. In order to filter out the interference of high-frequency signals and improve the dynamic characteristics of the power supply, a 105pF, 50V high-frequency ceramic capacitor is connected in parallel at both ends of the filter capacitor.4.2.4 How to choose a three-terminal integrated voltage regulatorThe condition that the power consumption of the three-terminal integrated voltage regulator must meet is greater than 5W and the output voltage is 5V. This design chooses L7805CT, the output voltage is 4.8～5.2V, the quiescent current is 4.2～8mA, and the maximum output current can be 1.5A, which meets the design requirements. Considering the large output current, a heat sink needs to be added.V ApplicationAdopt the design based on L7805CT to provide 5V DC power supply for counter, decoder and digital tube.Use the button to generate a single clock, realize the count of modulo 10 through the standard counter circuit, and generate the corresponding code. The value is output to the integrated decoding circuit through the decoder to display the numbers 0-9. Use the "DP" section of the integrated decoding circuit as a power-on indication. The counter has a reset button, and the integrated decoding circuit adopts a common cathode structure to realize addition and subtraction counting. as shown in figure 2.Figure 2. L7805 CircuitVI ConclusionThe 5V, 1A DC power supply design based on the L7805CT described in this blog can provide 5V DC power supply for counters, decoders, and digital tubes to achieve addition and subtraction counting.The design circuit of the L7805CT is simple, with few components, low power consumption and stable. Therefore, it can be extended to other object applications as a DC stabilized power supply to provide electrical energy.FAQWhat is l7805?A voltage regulator IC maintains the output voltage at a constant value. 7805 IC, a member of 78xx series of fixed linear voltage regulators used to maintain such fluctuations, is a popular voltage regulator integrated circuit (IC). ... 7805 IC provides +5 volts regulated power supply with provisions to add a heat sink.What is the working principle of IC 7805?A voltage regulator IC maintains the output voltage at a constant value. 7805 IC, a member of 78xx series of fixed linear voltage regulators used to maintain such fluctuations, is a popular voltage regulator integrated circuit (IC). The xx in 78xx indicates the output voltage it provides.How do I test a 7805 with a multimeter?Turn on the DC power supply and adjust the output voltage of about 8V or slightly larger. Or alternatively you can use a battery 9V-12V as voltage source. Look at the voltmeter panel when you set the voltage. Prepare a DC voltmeter readings on voltage range 50V to measure the output voltage of the IC 7805.How does 7805 regulate voltage?For 7805 IC, it is +5V DC regulated power supply. This regulator IC also adds a provision for a heat sink. The input voltage to this voltage regulator can be up to 35V, and this IC can give a constant 5V for any value of input less than or equal to 35V which is the threshold limit.