STMicroelectronics TDA7703

Description

The TDA7719 is a high performance signal processor specifically designed for car radio applications. The device includes a high performance audioprocessor with fully integrated audio filters and new Soft Step architecture. The digital control allows programming in a wide range of filter characteristics. By the use of BCMOS process and liner signal processing low distortion and low noise are obtained.

Features

■ Input multiplexer
– Multiple input configuration for different application
■ Loudness
– 2nd order frequency response
– Programmable center frequency
– 15dB with 1dB steps
– Selectable high frequency boost
– Selectable flat-mode
■ Volume
– +15dB to -15dB with 1dB step resolution
– Soft-step control with programmable blend times
■ Bass
– 2nd order frequency response
– Center frequency programmable in 4 steps
– Q programmable 1.0/1.25/1.5/2.0
– DC gain programmable
– -15 to 15dB range with 1dB resolution
■ Middle
– 2nd order frequency response
– Center frequency programmable in 4 steps
– Q programmable 0.5/0.75/1.0/1.25
– -15 to 15dB range with 1dB resolution
■ Treble
– 2nd order frequency response
– Center frequency programmable in 4 steps
– -15 to 15dB range with 1dB resolution
■ Speaker
– 4 independent soft step speaker controls
– 0dB to -79dB with 1dB steps
– Direct mute
■ Subwoofer
– 2nd order low pass filter with
programmable cut off frequency
– 2 independent soft step level control,
■ Mute functions
– Direct mute
– Digitally controlled SoftMute with 4
programmable mute-times
■ Offset detection
– Offset voltage detection circuit for on-board
power amplifier failure diagnosis
■ Level meter
– Provide rectified level voltage of main
source signal (before loudness)
■ Rear seat selector
– Full source selector for rear seat output
■ Mixing selector