The Kynix Components

Catalog Product Overview IR2104 Related Video Introduction IR2104 CAD Models IR2104 Pin Assignments IR2104 Typical Connection IR2104 Block Diagram IR2104 Features IR2104 Datasheet IR2104 Specifications IR2104 Manufacturer Using Warning IR2104 FAQ   Product Overview The IR2104(S) are high voltage, high speed power MOSFET and IGBT drivers with dependent high and low side referenced output channels. Proprietary HVIC and latch immune CMOS technologies enable ruggedized monolithic construction. The logic input is compatible with standard CMOS or LSTTL output, down to 3.3V logic. The output drivers feature a high pulse current buffer stage designed for minimum driver cross-conduction. The floating channel can be used to drive an N-channel power MOSFET or IGBT in the high side configuration which operates from 10 to 600 volts.   IR2104 Related Video Introduction IR2104 Video Description: Hi, welcome all. In today's video I'll show you how to make a simple 12V to 220V DC to AC Inverter based on the IR2104 Half bridge driver IC and 555 timer square wave generator.   IR2104 CAD Models Figure: IR2104 PCB Symbol       Figure: IR2104 Footprint       Figure: IR2104 3D Models   IR2104 Pin Assignments Figure: IR2104 Pin Assignments   IR2104 Typical Connection Figure: IR2104 Typical Connection   IR2104 Block Diagram Figure: IR2104 Block Diagram   IR2104 Features Floating channel designed for bootstrap operation      Fully operational to +600V      Tolerant to negative transient voltage      dV/dt immune Gate drive supply range from 10 to 20VUndervoltage lockout3.3V, 5V and 15V input logic compatibleCross-conduction prevention logicInternally set deadtimeHigh side output in phase with inputShut down input turns off both channelsMatched propagation delay for both channelsAlso available LEAD-FREE   IR2104 Datasheet You can download the datasheet from the link given below: IR2104 Datasheet   IR2104 Specifications TypeDescriptionCategoryIntegrated Circuits (ICs)PMIC - Gate DriversPart StatusObsoleteDriven ConfigurationHalf-BridgeChannel TypeSynchronousNumber of Drivers2Gate TypeIGBT, N-Channel MOSFETVoltage - Supply10V ~ 20VLogic Voltage - VIL, VIH0.8V, 3VCurrent - Peak Output (Source, Sink)210mA, 360mAInput TypeNon-InvertingHigh Side Voltage - Max (Bootstrap)600 VRise / Fall Time (Typ)100ns, 50nsOperating Temperature-40°C ~ 150°C (TJ)Mounting TypeThrough HolePackage / Case8-DIP (0.300", 7.62mm)Supplier Device Package8-PDIP   IR2104 Manufacturer Infineon Technologies is a leading global designer, manufacturer and supplier of a broad range of semiconductors used in various microelectronic applications. Infineon's product portfolio consists of logic products, including digital, mixed-signal, and analog integrated circuits, as well as discrete semiconductor products.   Using Warning Note: Please check their parameters and pin configuration before replacing them in your circuit.   IR2104 FAQ What is IR2104? The IR2104(S) are high voltage, high speed power MOSFET and IGBT drivers with dependent high and low side referenced output channels. The floating channel can be used to drive an N-channel power MOSFET or IGBT in the high side configuration which operates from 10 to 600 volts.   What is half bridge converter? A half-bridge converter is a type of DC-DC converter that, like flyback and forward converters, can supply an output voltage either higher or lower than the input voltage and provide electrical isolation via a transformer.   How does half bridge converter work? Half-Bridge DC/DC Converter. The converter's two switching elements alternate back and forth, switching the voltage (0.5 Vin) across the primary winding. The primary therefore experiences a positive and negative voltage swing, which necessitates a full-wave bridge circuit for the output.  

Product OverviewThe 74HC138 is a high speed CMOS device. The device accepts a three bit binary weighted address on input pins A0, A1 and A2 and when enabled will produce one active low output with the remaing seven being high. There are two active LOW enable inputs E1 and E2, and one active HIGH enable input E3. The disabled device state results in all outputs being high. The enable state occurs with E1 and E2 asserted low and E3 asserted high. This blog will introduce 74HC138 systematically from its features, pinout to its specifications, applications, also including 74HC138 datasheet and so much more. CatalogProduct Overview74HC138 Features74HC138 Pinout74HC138 Applications74HC138 Circuit Schematic74HC138 Logic Diagram74HC138 Block Diagram74HC138 Package74HC138 Specification74HC138 Manufacturer74HC138 DatasheetUsing Warnings74HC138 FAQ 74HC138 FeaturesWide supply voltage range from 2.0 to 6.0 VCMOS low power dissipationHigh noise immunityLatch-up performance exceeds 100 mA per JESD 78 Class II Level BDemultiplexing capabilityMultiple input enable for easy expansionIdeal for memory chip select decodingActive LOW mutually exclusive outputsInput levels: For 74HC138: CMOS levelFor 74HCT138: TTL levelComplies with JEDEC standards:JESD8C (2.7 V to 3.6 V)JESD7A (2.0 V to 6.0 V)ESD protection:HBM JESD22-A114F exceeds 2000 VMM JESD22-A115-A exceeds 200 VMultiple package optionsSpecified from -40 °C to +85 °C and from -40 °C to +125 °C  74HC138 PinoutThe following figure is the diagram of 74HC138 pinout. 74HC138 Pinout 74HC138 ApplicationsMemory chip select decodingDemultiplexingSingle line peripheral controlAllow simple serial bit streams from a microcontroller to control asmany peripheral lines as needed 74HC138 Circuit SchematicVOL and VOH are typical voltage output levels that occur with the output load. Waveforms and test circuit 74HC138 Logic DiagramThe following figure shows the logic diagram of 74HC138. 74HC138 Logic Diagram 74HC138 Block DiagramThe following figure shows the block diagram of 74HC138. 74HC138 Block Diagram 74HC138 PackageThe following diagram shows the 74HC138 package. 74HC138 Package 74HC138 SpecificationBrand Name:NXP SemiconductorLength:5 mmLoad Capacitance (CL):50 pFOperating Temperature-Max:125 °COperating Temperature-Min: -40 °CPeak Reflow Temperature (Cel):260Power Supplies:2/6 VProp. Delay@Nom-Sup:45 nsPropagation Delay (tpd):225 nsSupply Voltage-Max (Vsup):6 VSupply Voltage-Min (Vsup):2 VSupply Voltage-Nom (Vsup):5 VSubcategory:Decoder/Drivers 74HC138 ManufacturerNXP Semiconductors N.V. enables secure connections for a smarter world, advancing solutions that make lives easier, better and safer. As the world leader in secure connectivity solutions for embedded applications, NXP is driving innovation in the automotive, industrial & IoT, mobile and communication infrastructure markets. 74HC138 DatasheetYou can download 74HC138 datasheet from the link given below:74HC138 Datasheet Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. 74HC138 FAQWhat is a 74HC138?The 74HC138 is a high speed CMOS device. The device accepts a three bit binary weighted address on input pins A0, A1 and A2 and when enabled will produce one active low output with the remaing seven being high. There are two active LOW enable inputs E1 and E2, and one active HIGH enable input E3. What is a 3 to 8 decoder?A 3 to 8 decoder has three inputs (A,B,C) and eight outputs (DO to D7). Based on the 3 inputs one of the eight outputs is selected. The truth table for 3 to 8 decoder is shown in table (1). What are the advantages of 3 to 8 line decoder in computer interfacing?3 to 8 line Decoder has a memory of 8 stages. It is convenient to use an AND gate as the basic decoding element for the output because it produces a “HIGH” or logic “1” output only when all of its inputs are logic “1”. You can clearly see the logic diagram is developed using the AND gates and the NOT gates. When a decoder can be used as a demultiplexer?A decoder with an enable input can function as a Demultiplexer. A demultiplexer is a circuit that receives information on a single line and transmits this information on one of 2n possible output lines. Selection of a specific output line is controlled by the bit values of n selection lines. What does a decoder do in a circuit?A decoder is a circuit that changes a code into a set of signals. It is called a decoder because it does the reverse of encoding, but we will begin our study of encoders and decoders with decoders because they are simpler to design.

Product OverviewThe MLX90393 brings the highest flexibility in the Triaxis portfolio's smallest packaged assembly. Additionally, the MLX90393 is designed for micropower applications, with programmable duty cycles in the range of 0.1% to 100% allowing for configurable power consumption based on system requirements. The MLX90393 magnetic field sensor can be reprogrammed to different modes and with different settings at run-time to fine-tune the performance and power consumed. The sensor offers a 16-bit output proportional to the magnetic flux density sensed along the X, Y, and Z axes using the Melexis proprietary Triaxis technology and offers a 16-bit temperature output signal. These digital values are available via I2C and SPI, where the MLX90393 is a slave on the bus. Multiple sensors can be connected to the same bus, by A0 and A1 hardwired connection (4x) but also through ordering codes with different SW address (4x). This blog will introduce MLX90393 systematically from its features, pinout to its specifications, applications, also including MLX90393 datasheet and so much more. CatalogProduct OverviewRelated Video IntroductionMLX90393 FeaturesMLX90393 PinoutMLX90393 Pin ConfigurationMLX90393 ApplicationsMLX90393 Block DiagramMLX90393 Circuit DiagramMLX90393 PackageMLX90393 SpecificationMLX90393 ManufacturerMLX90393 DatasheetUsing WarningsMLX90393 FAQ Related Video Introduction Video: Magnetic Field Sensor - Magnetometer (MLX90393) MLX90393 Video Description: The MLX90393 is the newest addition to the Melexis position sensing portfolio, bringing the highest flexibility in the portfolio’s smallest assembly. Complementing this, the magnetic field sensor is designed for micropower applications, with programmable duty cycles in the range of 0.1% to 100%. MLX90393 FeaturesAbsolute Position Sensor IC featuringTriaxis® Hall TechnologySimple & Robust Magnetic DesignMiniature size for tiny assembliesSelectable SPI and I2C bus protocolsWide dynamic range (5-50mT) with on-thefly programmable gain2V-3.6V supply for battery poweredapplications, down to 1.8V IO voltageOn board filter settingsOn the fly programmable operating modesand sleep times for micro-power useExternal and internal acquisition triggeringmodesExternal interrupt pin when the fieldchangesOn board temperature sensor MLX90393 PinoutThe following figure is the diagram of MLX90393 pinout. MLX90393 Pinout MLX90393 Pin ConfigurationPin NumberPin NameDescriptions1CSSPI Chip select2MISOSPI MISO (Master IN Slave Out)3MOSISPI MOSI (Master Out Slave In)4SCLKSPI Clock input53.3V3.3V Input6GNDPower supply ground7GNDPower supply ground83.3V3.3V Input9SDAI2C serial data (SDA)10SCLI2C serial clock (SCL)11INTInterrupt Pin12TRIGTRIGGER Pin MLX90393 ApplicationsNon-contacting HMI applications with push-pull functionalityRotary knobs & dials(Long stroke) Linear motion in one or two axes for levers & sliding switchesJoystick (gimbal or ball & socket)Home Security 3D closure detectionAccurate liquid level sensingFactory automation position sensingMagnetic fingerprint detection MLX90393 Block DiagramThe following figure shows the block diagram of MLX90393. MLX90393 Block Diagram MLX90393 Circuit DiagramThe following is the circuit diagram of MLX90393. I2C recommended schematic 3/4wire SPI recommended schematic MLX90393 PackageThe following diagram shows the MLX90393 package. MLX90393 Package MLX90393 SpecificationOperating Voltage: 2.2V-3.6VCurrent Consumption: 100µA (Typ.)Operating Temperature: -20°C – 85°CResolution: 0.161µTMax Full Scale Resolution: 44,000µTI2C Address: 0xC0 MLX90393 ManufacturerMelexis is a global supplier of micro-electronic semiconductor solutions and stands for engineering that enables the best imaginable future - a future which is safe, clean, comfortable and healthy. All of these aspects are reflected in the applications that our technology empowers. MLX90393 DatasheetYou can download MLX90393 datasheet from the link given below:MLX90393 Datasheet Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. MLX90393 FAQWhat is a magnetometer used for?A magnetometer is a scientific instrument used to measure the strength and direction of the magnetic field in the vicinity of the instrument. How does magnetometer sensor work?This magnetometer measures the resonance frequency of the protons in a magnetic field by using nuclear magnetic resonance (NMR). When a polarizing DC current is sent through a solenoid, it creates high magnetic flux around the hydrogen-rich fuel like kerosene and some of the protons get aligned with this flux. Why does my phone have a magnetometer?Compass functionality in phones and tablets is enabled by something a bit more sophisticated – a sensor called a magnetometer, which is used to measure the strength and direction of magnetic fields. By analyzing Earth's magnetic field, the sensor allows a phone to determine its orientation pretty accurately.

CatalogProduct OverviewIRLB8721PBF Related Video IntroductionIRLB8721PBF CAD ModelsIRLB8721PBF Test CircuitsIRLB8721PBF Packaging DimensionsIRLB8721PBF BenefitsIRLB8721PBF ApplicationsIRLB8721PBF DatasheetIRLB8721PBF SpecificationsIRLB8721PBF ManufacturerUsing WarningIRLB8721PBF FAQ Product OverviewInfineon 30V HEXFET® Power MOSFETs are designed for high density applications requiring small size, high efficiency and improved thermal conduction, making them ideally suited for notebook applications and point-of-load (POL) converters used in servers, as well as advanced telecom and datacom systems. These 30V HEXFET Power MOSFETs offer significant gate oxide improvement over previous generations and provide high performance as part of a system-wide solution to optimize 12VIN / 1V to 3V OUT DC-DC synchronous buck converter applications. IRLB8721PBF Related Video IntroductionIRLB8721PBF Video Description: The Power MOSFET Data Sheet contains characteristics, ratings and performance detail that is critical to the selection and use of the MOSFET in an application. While each application is unique the MOSFET data sheet can provide useful information for initial power loss calculations and it provides a snapshot of device performance capabilities. This video will provide an overview an overview of the Power MOSFET data sheet and clarification of specific data sheet parameters and definitions. IRLB8721PBF CAD ModelsFigure: IRLB8721PBF PCB Symbol   Figure: IRLB8721PBF Footprint   Figure: IRLB8721PBF 3D Models IRLB8721PBF Test CircuitsFigure: IRLB8721PBF Unclamped Inductive Test Circuit  Figure: IRLB8721PBF Switching Time Test Circuit   Figure: IRLB8721PBF Gate Charge Test Circuit IRLB8721PBF Packaging DimensionsFigure: IRLB8721PBF Packaging Dimensions IRLB8721PBF BenefitsVery Low RDS(on) at 4.5V VGSUltra-Low Gate ImpedanceFully Characterized Avalanche Voltageand CurrentLead-Free IRLB8721PBF ApplicationsOptimized for UPS/Inverter ApplicationsHigh Frequency Synchronous BuckConverters for Computer Processor PowerHigh Frequency Isolated DC-DCConverters with Synchronous Rectification for Telecom and Industrial Use IRLB8721PBF DatasheetYou can download the datasheet from the link given below:IRLB8721PBF Datasheet IRLB8721PBF SpecificationsProduct AttributeAttribute ValueManufacturer:InfineonProduct Category:MOSFETTechnology:SiMounting Style:Through HolePackage / Case:TO-220-3Transistor Polarity:N-ChannelNumber of Channels:1 ChannelVds - Drain-Source Breakdown Voltage:30 VId - Continuous Drain Current:62 ARds On - Drain-Source Resistance:8.7 mOhmsVgs - Gate-Source Voltage:- 20 V, + 20 VVgs th - Gate-Source Threshold Voltage:1.8 VQg - Gate Charge:7.6 nCOperating Temperature:-55°C ~ 175°C (TJ)Pd - Power Dissipation:65 WChannel Mode:EnhancementTradename:HEXFETPackaging:TubeBrand:Infineon / IRConfiguration:SingleFall Time:17 nsForward Transconductance - Min:35 SHeight:15.65 mmLength:10 mmProduct Type:MOSFETRise Time:93 nsSeries:N-ChannelSubcategory:MOSFETsTransistor Type:1 N-ChannelTypical Turn-Off Delay Time:9 nsTypical Turn-On Delay Time:9.1 nsWidth:4.4 mmPart # Aliases:IRLB8721PBF SP001558140Unit Weight:0.068784 oz IRLB8721PBF ManufacturerInfineon Technologies is a leading global designer, manufacturer and supplier of a broad range of semiconductors used in various microelectronic applications. Infineon's product portfolio consists of logic products, including digital, mixed-signal, and analog integrated circuits, as well as discrete semiconductor products. Using WarningNote: Please check their parameters and pin configuration before replacing them in your circuit. IRLB8721PBF FAQWhat is IRLB8721PBF?The IRLB8721PBF is a 30V single N-channel HEXFET® Power MOSFET with extremely low on-resistance per silicon area and fast switching performance using Trench MOSFET technology. What is a power Mosfet used for?Power MOSFETs are widely used in transportation technology, which include a wide range of vehicles. In the automotive industry, power MOSFETs are widely used in automotive electronics. Power MOSFETs (including DMOS, LDMOS and VMOS) are commonly used for a wide range of other applications. What is the difference between MOSFET and power mosfet?Power MOSFET is a type of MOSFET which is specially meant to handle high levels of power. These exhibit high switching speed and can work much better in comparison with other normal MOSFETs in the case of low voltage levels. However its operating principle is similar to that of any other general MOSFET. 

CatalogProduct OverviewIRF9530 Related Video IntroductionIRF9530 SymbolIRF9530 Test CircuitsIRF9530 FeaturesIRF9530 DatasheetIRF9530 SpecificationsIRF9530 ManufacturerUsing WarningIRF9530 FAQ Product OverviewThese are P-Channel enhancement mode silicon gate power field effect transistors. They are advanced power MOSFETs designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche mode of operation. All of these power MOSFETs are designed for applications such as switching regulators, switching converters, motor drivers, relay drivers, and drivers for high power bipolar switching transistors requiring high speed and low gate drive power. The high input impedance allows these types to be operated directly from integrated circuits. IRF9530 Related Video IntroductionIRF9530 Video Description: This is a video for testing or checking a N and P-channel MOSFET using a DMM and a power supply.  It teaches a quick way to check a MOSFET if it defective.It show the way to check the body diode of a MOSFET and to check if the MOSFET is ON or OFF by applying a gate voltage.  This can also be done using only a DMM but I discovered not all DMMs are the same.  If the voltage injected by the DMM is low, it is not enough to turn the MOSFET ON so you will think it is open.  Applying a 10 volt gate voltage is also closest to the real application of the MOSFET. IRF9530 SymbolFigure: IRF9530 Symbol IRF9530 Test CircuitsFigure: IRF9530 Unclamped Energy Test Circuit  Figure: IRF9530 Switching Time Test Circuit   Figure: IRF9530 Gate Charge Test Circuit IRF9530 Features-10A and -12A, -80V and -100VrDs(ON)= 0.30 and 0.40Single Pulse Avalanche Energy RatedSOA is Power Dissipation LimitedNanosecond Switching SpeedsLinear Transfer CharacteristicsHigh Input ImpedanceRelated Literature- TB334,“Guidelines for Soldering Surface Mount Components to PC Boards" IRF9530 DatasheetYou can download the datasheet from the link given below:IRF9530 Datasheet IRF9530 SpecificationsTypeDescriptionCategoryDiscrete Semiconductor ProductsTransistors - FETs, MOSFETs - SinglePart StatusActiveFET TypeP-ChannelTechnologyMOSFET (Metal Oxide)Drain to Source Voltage (Vdss)100 VCurrent - Continuous Drain (Id) @ 25°C12A (Tc)Rds On (Max) @ Id, Vgs300mOhm @ 6.5A, 10VVgs(th) (Max) @ Id4V @ 250µAGate Charge (Qg) (Max) @ Vgs45 nC @ 10 VVgs (Max)±20VInput Capacitance (Ciss) (Max) @ Vds500 pF @ 25 VPower Dissipation (Max)75W (Tc)Operating Temperature-55°C ~ 150°C (TJ)Mounting TypeThrough HoleSupplier Device PackageTO-220ABPackage / CaseTO-220-3 IRF9530 ManufacturerHarris is an international communications and information technology company serving government and commercial markets in more than 150 countries. Headquartered in Melbourne, Florida, the company has annual revenue of $5.4 billion and 16,500 employees including nearly 7,000 engineers and scientists. Harris is dedicated to developing best-in-class assured communications; products, systems, and services. Using WarningNote: Please check their parameters and pin configuration before replacing them in your circuit. IRF9530 FAQWhat is IRF9530?IRF9530 is new generation of high voltage MOSFET family that is utilizing an advanced charge balance mechanism for outstanding low on-resistance and lower gate charge performance. What is P-channel power Mosfet?A P-Channel MOSFET is a type of MOSFET in which the channel of the MOSFET is composed of a majority of holes as current carriers. A depletion-type MOSFET is normally on (maximum current flows from source to drain) when no difference in voltage exists between the gate and source terminals. What is P-channel MOSFET used for?P-channel MOSFETs are often used for load switching. The simplicity of P-channel solutions on the high side makes them equally attractive for applications such as Low-Voltage Drives and non-isolated Point of Loads in systems where space is at a premium. Which MOSFET is faster N channel or P-channel?The mobility of electrons, which are carriers in the case of an n-channel device, is greater than that of holes, which are the carriers in the p-channel device. Thus an n-channel device is faster than a p-channel device. The N-channel transistor has lower on-resistance and gate capacitance for the same die area. 

Product OverviewThe HTS221 is an ultra-compact sensor for relative humidity and temperature. It includes a sensing element and a mixed signal ASIC to provide the measurement information through digital serial interfaces. This blog will introduce HTS221 systematically from its features, pinout to its specifications, applications, also including HTS221 datasheet and so much more. CatalogProduct OverviewRelated Video IntroductionHTS221 FeaturesHTS221 PinoutHTS221 ApplicationsHTS221 CAD ModelsHTS221 Block DiagramHTS221 Circuit DiagramHTS221 PackageHTS221 SpecificationHTS221 ManufacturerHTS221 DatasheetUsing WarningsHTS221 FAQ Related Video Introduction Video: Arduino Nano - HTS221 Relative Humidity and Temperature Sensor Tutorial HTS221 Video Description: HTS221 Capacitive Digital Sensor for Relative Humidity and Temperature I²C Mini Module. It includes a sensing element and a mixed signal ASIC to provide the measurement information through digital serial interfaces. HTS221 Features0% to 100% relative humidity rangeSupply voltage: 1.7V to 3.6VLow power consumption: 2μA @ 1Hz ODRSelectable ODR from 1Hz to 12.5HzHigh rH sensitivity: 0.004% rH/LSBHumidity accuracy: ± 5% rH, 20% to +80% rHTemperature accuracy: ±5°C, 15°C to +40°CEmbedded 16-bit ADC16-bit humidity and temperature output dataSPI and I2C interfacesFactory calibratedTiny 2mm x 2mm x 0.9mm packageECOPACK® compliant HTS221 PinoutThe following figure is the diagram of HTS221 pinout. HTS221 Pinout HTS221 ApplicationsAir conditioning, heating and ventilationAir humidifiersRefrigeratorsWearable devicesSmart home automationIndustrial automationRespiratory equipmentAsset and goods tracking HTS221 CAD ModelsThe followings are HTS221 Symbol, Footprint, and 3D Model. HTS221 Symbol HTS221 Footprint HTS221 3D Model HTS221 Block DiagramThe following figure shows the block diagram of HTS221. HTS221 Block Diagram HTS221 Circuit DiagramThe following is the circuit diagram of HTS221. HTS221 electrical connections HTS221 PackageThe following diagram shows the HTS221 package. HTS221 Package HTS221 SpecificationManufacturer:STMicroelectronicsOperating Temperature-Max:120 °COperating Temperature-Min:-40 °CSeated Height-Max:0.9 mmSupply Voltage-Max (Vsup):3.6 VSupply Voltage-Min (Vsup):1.7 VSupply Voltage-Nom (Vsup):2.5 VWidth:2 mmSensor Type:Humidity, TemperatureAccuracy:±4.5% RH HTS221 ManufacturerSTMicroelectronics is a global independent semiconductor company and a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivaled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio, and strategic partners positions, STMicroelectronics is at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence trends. HTS221 DatasheetYou can download HTS221 datasheet from the link given below:HTS221 Datasheet Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. HTS221 FAQHow does a humidity and temperature sensor work?Humidity sensors work by detecting changes that alter electrical currents or temperature in the air. Two thermal sensors conduct electricity based upon the humidity of the surrounding air. One sensor is encased in dry nitrogen while the other measures ambient air. The difference between the two measures the humidity. Where should the temperature and humidity sensor be placed?The mounting location should be in a sheltered area that is protected from rain. Ideally, the transmitter should be located on the north-side of the building (under an eave) to prevent sun-heated air from rising up the building's wall and affecting the relative humidity of the sensor. How accurate is DHT22?The DHT22 is the more expensive version which obviously has better specifications. Its temperature measuring range is from -40°C to +125°C with +-0.5 degrees accuracy, while the DHT11 temperature range is from 0°C to 50°C with +-2 degrees accuracy.