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
100nF
4.7nF
22nF
22nF
LP1
HP1
HP2
PS1
PS2
PS3
PS4
100nF
L-in
100K
RLP1
RHP1
R5
R6
-
+
RPS1
RPS2
RPS3
RPS4
MIXING
AMP
Lout
PS1
90Hz
PS2
4KHz
PS3
400Hz
PS4
400Hz
-
+
SIM
MUSIC
MOVIE/
MUSIC
PHASE SHIFTER
100nF
R-in
100K
SUPPLY
MIXING
AMP
Rout
VS
AGND
CREF
February 1997
+
-
L-R
LPF
9KHz
C5
22碌F
LP
1.2nF
+
OFF
MOVIE/SIM
SCL
I
2
C BUS
DECODER
LATCHES
SDA
DIG GND
ADDR
EFFECT
CONTROL
REAR
D94AU122A
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