Three Band Car Audio Processor 28-Pin TSSOP T/R

The TDA7718B 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.

Input multiplexer

QD1: quasi-differential stereo inputs

SE1: stereo single-ended input

SE2: stereo single-ended input

SE3: stereo single-ended input

FD full-differential or quasi-differential input

Loudness

2^ndorder frequency response

Programmable center frequency(400 Hz / 800 Hz / 2400 Hz)

15 dB with 1 dB steps

Selectable high frequency boost

Selectable flat-mode (constant attenuation)

Volume

+23 dB to -31 dB with 1 dB step resolution

Soft-step control with programmable blend times

Bass

2^ndorder frequency response

Center frequency programmable in 4 steps(60 Hz / 80 Hz / 100 Hz / 200 Hz)

Q programmable 1.0/1.25/1.5/2.0

DC gain programmable

-15 dB to 15 dB range with 1 dB resolution

Middle

2^ndorder frequency response

Center frequency programmable in 4 steps(500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz)

Q programmable 0.75/1.0/1.25

-15 dB to 15 dB range with 1 dB resolution

Treble

2^ndorder frequency response(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)

Center frequency programmable in 4 steps(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)

-15 dB to 15 dB with 1 dB resolution

Speaker

4 independent soft-step speaker controls

+15 dB to -79 dB with 1 dB steps

Direct mute

Subwoofer

2^ndorder low pass filter with programmable cut off frequency(55 Hz / 85 Hz / 120 Hz / 160 Hz)

2 independent soft-step level control,+15 dB to –79 dB with 1 dB steps

Mute functions

Direct mute

Digitally controlled soft-mute with 4 programmable mute-times (0.48 ms/0.96 ms/8 ms/16 ms)

Offset detection

Offset voltage detection circuit for on-board power amplifier failure diagnosis