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.
**Key Features**
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
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 -31 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 dB 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 dB to 15 dB range with 1 dB resolution
Treble
2nd order 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
2nd order 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
