TDA7721TR
数据手册.pdf5 band car audio processor
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**
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- Input multiplexer
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- QD1 to QD2: quasi-differential stereo input
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- SE1 to SE3: stereo single-ended input
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- InGain
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- 6 dB with 1 dB steps
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- Loudness
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- 2nd order frequency response
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- Programmable center frequency 400 Hz / 800 Hz / 2400 Hz
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- 15 dB with 1 dB steps
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- Selectable high frequency boost
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- Selectable flat-mode constant attenuation
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- Volume
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- +23 dB to -79 dB with 1 dB step resolution
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- SoftStep control with programmable blend times
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- EQ1
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- 2nd order frequency response
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- Center frequency programmable in 4 steps 63 Hz / 80 Hz/ 100 Hz /125 Hz
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- Q programmable in 4 steps 1.0/1.25/1.5/2.0
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- -15 to 15 dB range with 1 dB resolution
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- EQ2
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- 2nd order frequency response
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- Center frequency programmable in 4 steps 200 Hz/ 250 Hz/ 315 Hz/ 400 Hz
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- Q programmable in 4 steps 1.0/1.25/1.5/2.0
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- -15 to 15 dB range with 1 dB resolution
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- EQ3
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- 2nd order frequency response
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- Center frequency programmable in 4 steps 630 Hz/ 800 Hz/ 1 kHz/ 1.25 kHz
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- Q programmable in 4 steps 0.75/1.0/1.25/2
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- -15 to 15 dB range with 1 dB resolution
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- EQ4
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- 2nd order frequency response
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- Center frequency programmable in 4 steps 2 kHz/ 2.5 kHz/ 3.15 kHz/ 4 kHz
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- Q programmable in 4 steps 0.75/1.0/1.25/2
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- -15 to 15 dB range with 1 dB resolution
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- EQ5
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- 2nd order frequency response
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- Center frequency programmable in 4 steps 6.3 kHz/ 8 kHz / 10 kHz/ 12.5 kHz
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- Q programmable in 4 steps 0.75/1.0/1.25/2
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- -15 to 15 dB range with 1 dB resolution
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- Highpass
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- 2nd order frequency response
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- Center frequency programmable in 5 steps 63 Hz / 100 Hz / 120 Hz / 150 Hz/ 180 Hz
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- Subwoofer
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- 2nd order low pass filter
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- Programmable cut off frequency
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- 55 Hz / 85 Hz / 120 Hz / 160 Hz
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- Speaker
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- 6 independent soft step speaker controls
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- +15 dB to -79 dB with 1 dB steps
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- Three selectable output DC level
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- Direct mute
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- Mute functions
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- Direct mute
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- Digitally controlled SoftMute with 4 programmable mute-times
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- 0.48 ms / 0.96 ms / 8 ms / 16 ms
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- Offset detection
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- Offset voltage detection circuit for on-board power amplifier failure diagnosis