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October 2003 s 3 STEREO INPUTS s 3 MONO INPUTS
s DYNAMIC-COMPRESSION-STAGE FOR CD s SOFTSTEP-VOLUME
s BASS, TREBLE AND LOUDNESS CONTROL s VOICE-BAND-FILTER
s DIRECT MUTE AND SOFTMUTE s INTERNAL BEEP
s FOUR INDEPENDENT SPEAKER-OUTPUTS s STEREO SUBWOOFER OUTPUT s
INDEPENDENT SECOND SOURCE-SELECTOR
无锡s FULL MIXING CAPABILITY s
PAUSE DETECTOR
Stereodecoder:s RDS MUTE
s NO EXTERNAL ADJUSTMENTS
s
AM/FM NOISEBLANKER WITH SEVERAL TRIGGER CONTROLS
s PROGRAMMABLE MULTIPATH DETECTOR s
QUALITY DETECTOR OUTPUT
Digital Control:I 2C-BUS INTERFACE
DESCRIPTION
The device includes a high performance audiopro-cessor and a stereodecoder-noiseblanker combina-tion with the whole low frequency signal processing necessary for state-of-the-art as well as future carra-dios. The digital control allows a programming in a wide range of all the filter characteristics. Also the stereodecoder part offers several possibilities of pro-gramming especially for the adaptation to different IF-devices.
CARRADIO SIGNAL PROCESSOR
TDA7412
ESD:
All pins are protected against ESD according to the MIL883 standard. ABSOLUTE MAXIMUM RATI
NGS
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THERMAL DATA
SUPPLY
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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 4 frequencies
Mixing stage Beep, Phone and Navigation mixable to all speaker-outputs
Loudness programmable center frequency and frequency response
15 x 1dB steps
selectable flat-mode (constant attenuation)
Volume0.5dB attenuator最爱的人是你
100dB range
soft-step control with programmable times
Compander dynamic range compression for use with CD
2:1 compression rate
programmable max. gain
Bass2nd order frequency response
center frequency programmable in 8 steps
DC gain programmable
+ 15 x 1dB steps
Treble2nd order frequency response
center frequency programmable in 4 steps
+15 x 1dB steps
Voice Bandpass2nd order butterworth highpass filter with programmable cut-off frequency 2nd order butterworth lowpass filter with programmable cut-off frequency
selectable flat-mode
Speaker 4 independent speaker controls in 1dB steps
control range 95dB
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separate Mute
Subwoofer single-ended stereo output
independent stereo level 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
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ELECTRICAL CHARACTERISTICS
= 9V; T= 25°C; R= 10kΩ; all gains = 0dB; f = 1kHz; unless otherwise specified
V
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ELECTRICAL CHARACTERISTICS (continued)
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