The TDA7721 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 SoftStep architecture. The digital control allows programming in a wide range of filter characteristics.
●Key Features
● Input multiplexer
● QD1 to QD2: quasi-differential stereo input
● SE1 to SE3: stereo single-ended input
● InGain
● 6 dB with 1 dB steps
● 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 -79 dB with 1 dB step resolution
● SoftStep control with programmable blend times
● EQ1
● 2nd order frequency response
● Center frequency programmable in 4 steps (63 Hz / 80 Hz/ 100 Hz /125 Hz)
● Q programmable in 4 steps (1.0/1.25/1.5/2.0)
● -15 to 15 dB range with 1 dB resolution
● EQ2
● 2nd order frequency response
● Center frequency programmable in 4 steps (200 Hz/ 250 Hz/ 315 Hz/ 400 Hz)
● Q programmable in 4 steps (1.0/1.25/1.5/2.0)
● -15 to 15 dB range with 1 dB resolution
● EQ3
● 2nd order frequency response
● Center frequency programmable in 4 steps (630 Hz/ 800 Hz/ 1 kHz/ 1.25 kHz)
● Q programmable in 4 steps (0.75/1.0/1.25/2)
● -15 to 15 dB range with 1 dB resolution
● EQ4
● 2nd order frequency response
● Center frequency programmable in 4 steps (2 kHz/ 2.5 kHz/ 3.15 kHz/ 4 kHz)
● Q programmable in 4 steps (0.75/1.0/1.25/2)
● -15 to 15 dB range with 1 dB resolution
● EQ5
● 2nd order frequency response
● Center frequency programmable in 4 steps (6.3 kHz/ 8 kHz / 10 kHz/ 12.5 kHz)
● Q programmable in 4 steps (0.75/1.0/1.25/2)
● -15 to 15 dB range with 1 dB resolution
● Highpass
● 2nd order frequency response
● Center frequency programmable in 5 steps (63 Hz / 100 Hz / 120 Hz / 150 Hz/ 180 Hz)
● Subwoofer
● 2nd order low pass filter
● Programmable cut off frequency
● (55 Hz / 85 Hz / 120 Hz / 160 Hz)
● Speaker
● 6 independent soft step speaker controls
● +15 dB to -79 dB with 1 dB steps
● Three selectable output DC level
● Direct mute
● Mute functions
● Direct mute
● Digitally controlled SoftMute 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
