Features

 Input multiplexer

– QD1: quasi-differential stereo input

– QD2: quasi-differential stereo input

– SE1: stereo single-ended input

– SE2: stereo single-ended input

– SE3: stereo single-ended input

 Loudness

– 2nd order 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 -63 dB with 1 dB step resolution

– Soft-step control with programmable blend

times

 Bass

– 2nd order 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 to 15 dB range with 1 dB resolution

 Middle

– 2nd order 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 to 15 dB range with 1 dB resolution

 Treble

– 2nd order frequency response

– Center frequency programmable in 4 steps

(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)

– -15 to 15 dB range with 1 dB resolution

 High-pass

– 2nd order frequency response

– Center frequency programmable in 3 steps

(100 Hz / 120 Hz / 150 Hz)

 Subwoofer

– 2nd order low pass filter

– 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

 Speaker

– 6 independent soft-step speaker controls

– +15 dB to -79 dB with 1 dB steps

– Two selectable output DC level

– Direct mute

 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

Description

The TDA7720B is a high performance signal

processor specifically designed for car radio

applications. The device includes a high

performance audio processor with fully integrated

audio filters and new soft-step architecture. The

digital control allows programming in a wide range

of filter characteristics.