TDA7346 Datasheet, PDF (1/14 Pages) STMicroelectronics – DIGITAL CONTROLLED SURROUND SOUND MATRIX

TDA7346
DIGITAL CONTROLLED SURROUND SOUND MATRIX
1 STEREO INPUT
THREE INDEPENDENT SURROUND MODES
ARE AVAILABLE MOVIE, MUSIC AND SIMU-
LATED
- MUSIC: 4 SELECTABLE RESPONSES
- MOVIE AND SIMULATED:
256 SELECTABLE RESPONSES
TWO INDEPENDENT INPUT ATTENUATORS
IN 0.31dB FOR BALANCE FACILITY
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL BUS
DESCRIPTION
The TDA7346 reproduces surround sound by us-
ing 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-
BLOCK DIAGRAM
SO20
DIP20
ORDERING NUMBER: TDA7346 (DIP20)
TDA7346D (SO20)
works and switches combined with operational
amplifiers.
5.6nF
680nF
LP1 HP1 HP2
100nF
PS1
4.7nF
PS2
22nF
PS3
22nF
PS4
100nF
L-in
100K
100nF
R-in
100K
RLP1 RHP1
R5
R6
-
+
+
RPS1
PS1
90Hz
-
SIM
+
MOVIE/
MUSIC
L-R
SUPPLY
LPF
9KHz
RPS2
PS2
4KHz
RPS3
PS3
400Hz
RPS4
PS4
400Hz
MIXING
AMP
PHASE SHIFTER
MUSIC
OFF
MOVIE/SIM
EFFECT
CONTROL
I²C BUS
DECODER
LATCHES
MIXING
AMP
Lout
SCL
SDA
DIG GND
ADDR
REAR
Rout
VS
AGND CREF
C5
22µF
LP
1.2nF
D94AU122A
February 1997
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