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TDA7345 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. TDA7345
Description  DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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TDA7345 Datasheet(HTML) 1 Page - STMicroelectronics

 
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TDA7345
DIGITALLY CONTROLLED AUDIO PROCESSOR
WITH SURROUND SOUND MATRIX
1 STEREO INPUT
VOLUME CONTROL IN 1.25dB STEP
TREBLE AND BASS CONTROL
THREE SURROUND MODES ARE AVAIL-
ABLE:
– MOVIE, MUSIC AND SIMULATED
FOUR SPEAKER ATTENUATORS:
– 4 INDEPENDENT SPEAKERS CONTROL
IN 1.25dB STEPS FOR BALANCE FACILITY
– INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL BUS
DESCRIPTION
The TDA7345 is a volume tone (bass and treble)
balance (Left/Right) processor for quality audio
applications in car radio and Hi-Fi systems.
It reproduces surround sound by using phase
shifters and a signal matrix. Control of all the
functions is accomplished by serial bus.
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained.
November 1999
®
HP2
L-in
BASS-LA
BASS-LB
TREBLE-L
REC_OUT_R
REC_OUT_L
Lout
Rout
1
3
2
4
5
6
7
8
9
AGND
SCL
SDA
TREBLE-R
DIG GND
BASS-RB
BASS-RA
R-in
REAR OUT
23
22
21
20
19
17
18
16
15
D94AU191A
10
11
12
13
14
28
27
26
25
24
CREF
PS2
PS1
LP1
HP1
REAR IN
LP
PS4
PS3
Vs
PIN CONNECTION
ORDERING NUMBER: TDA7345D
SO28
1/18


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