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TDA7405STN/a522avaiEQUALIZER CAR RADIO SIGNAL PROCESSOR


TDA7405 ,EQUALIZER CAR RADIO SIGNAL PROCESSORFeatures:Input Multiplexer 2 fully differential CD stereo inputs with programmable attenuation1 sin ..
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TDA7405
EQUALIZER CAR RADIO SIGNAL PROCESSOR
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TDA7405

October 2001 3 STEREO INPUTS 3 MONO INPUTS DYNAMIC-COMPRESSION-STAGE FOR CD BASS, TREBLE AND LOUDNESS CONTROL EQ-FILTERS FOR SEPARATE FRONT/REAR-
EQUALIZATION VOICE-BAND-FILTER FOR MIXING-CHANNEL DIRECT MUTE AND SOFTMUTE INTERNAL BEEP FOUR INDEPENDENT SPEAKER-OUTPUTS INDEPENDENT SECOND SOURCE-SELECTOR FULL MIXING CAPABILITY PAUSE DETECTOR
Stereodecoder
RDS MUTE NO EXTERNAL ADJUSTMENTS AM/FM NOISEBLANKER WITH SEVERAL
TRIGGER CONTROLS PROGRAMMABLE MULTIPATH DETECTOR QUALITY DETECTOR OUTPUT
Digital control:
I2 C-BUS INTERFACE
DESCRIPTION

The device includes a high performance audioprocessor
and a stereodecoder-noiseblanker combination with the
whole low frequency signal processing necessary for
state-of-the-art as well as future carradios. The digital
control allows a programming in a wide range of all the
filter characteristics. Also the stereodecoder part offers
several possibilities of programming especially for the
adaptation to different IF-devices.
EQUALIZER CARRADIO SIGNAL PROCESSOR
BLOCK DIAGRAM
TDA7405
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SUPPLY
THERMAL DATA
ABSOLUTE MAXIMUM RATINGS
ESD

All pins are protected against ESD according to the MIL883 standard.
PIN CONNECTION (Top view)
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TDA7405
BLOCK DIAGRAM (Enlarged view)
TDA7405
4/56 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 1dB 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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TDA7405
Table 1. ELECTRICAL CHARACTERISTICS

(VS=9V; Tamb=25°C; RL=10kΩ; all gains=0dB; f=1kHz; unless otherwise specified)
INPUT SELECTOR
DIFFERENTIAL STEREO INPUTS
DIFFERENTIAL MONO INPUTS
BEEP CONTROL
The Level for the 19kHz-Testtone is 2.1VRMS
MIXING CONTROL
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