TDA7405_04 Datasheet, PDF (4/57 Pages) STMicroelectronics – EQUALIZER CARRADIO SIGNAL PROCESSOR

TDA7405
4 AUDIOPROCESSOR PART
Features:
Input Multiplexer
2 fully differential CD stereo inputs with programmable attenuation
1 single-ended stereo input
2 differential mono input
1 single-ended mono input
In-Gain 0..15dB, 1dB steps
internal Offset-cancellation (AutoZero)
separate second source-selector
Beep
internal Beep with 3 frequencies + diagnostic setting (19kHz tone)
Mixing stage
Beep, Phone,Navigation and FM mixable to all speaker-outputs (see Figure 20)
programmabe Voice-Band Filter
Loudness
programmable center frequency and frequency response
15 x 1dB steps
selectable flat-mode (constant attenuation)
Volume
0.5dB attenuator
100dB range
soft-step control with programmable times
Bass
2nd order frequency response
center frequency programmable in 8 steps
DC gain programmable
± 15 x 0.5dB steps
Treble
2nd order frequency response
center frequency programmable in 4 steps
± 15 x 1dB steps
Equalizer
two stereo equalizing-filters for separate front/rear adaption
1st filter center-frequency programmable in 16 steps (4 steps/octave, min 63Hz, max
840Hz)
2nd filter center-frequency programmable in 16 steps (4 steps/octave, min 300Hz,
max 4kHz)
quality factor programmable in 4 steps
± 15 x 1dB steps
selectable flat-mode
Speaker
4 independent speaker controls in 1dB steps
control range 95dB
separate Mute
Mute Functions
direct mute
digitally controlled SoftMute with 4 programmable mute-times
Pause Detector
programmable threshold
Compander
dynamic range compression for use with CD
2:1 compression rate
programmable max. gain
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