TDA7718N Datasheet, PDF (1/40 Pages) STMicroelectronics – 3 band car audio processor

TDA7718N
3 band car audio processor
Features
■ Input multiplexer
– QD1: quasi-differential stereo inputs
– SE1: stereo single-ended input
– SE2: stereo single-ended input
– SE3: stereo single-ended input
– FD1 / SE4+SE5: 1 full-differential input or 2
stereo single-ended inputs
■ Loudness
– 2^nd 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
– 2^nd 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
– 2^nd 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
– 2^nd 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
TSSOP28
■ Speaker
– 4 independent soft step speaker controls
– +15 dB to -79 dB with 1 dB steps
– Direct mute
■ Subwoofer
– 2^nd 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
■ 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
Description
The TDA7718N 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.
Table 1. Device summary
Order code
Package
TDA7718N
TSSOP28
TDA7718NTR
TSSOP28
Packing
Tube
Tape and reel
October 2009
Doc ID 16502 Rev 1
1/40
www.st.com
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