TDA7343
DIGITALLY CONTROLLED AUDIO PROCESSOR
INPUT MULTIPLEXER
- TWO STEREO AND ONE MONO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTATION TO DIFFERENT SOURCES
FULLY
PROGRAMMABLE
LOUDNESS
FUNCTION
VOLUME CONTROL IN 0.3dB STEPS IN-
CLUDING GAIN UP TO 20dB
ZERO
CROSSING
MUTE
AND
DIRECT
MUTE
SOFT MUTE CONTROLLED BY SOFTWARE
OR HARDWARE PIN
BASS AND TREBLE CONTROL
FOUR SPEAKER ATTENUATORS
- FOUR INDEPENDENT SPEAKERS
CONTROL IN 1.25dB STEPS FOR
BALANCE AND FADER FACILITIES
- INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL I
2
CBUS
DESCRIPTION
The TDA7343 is an upgrade of the TDA7313
audioprocessor.
Thanks to the used BIPOLAR/CMOS technology,
very low distortion, low noise and DC-stepping
are obtained.
Due to a highly linear signal processing, using
CMOS-switching techniques instead of standard
bipolar multipliers, very low distortion and very
low noise are obtained Several new features like
softmute, zero-crossing mute and pause detector
are implemented.
The Soft Mute function can be activated in two
ways:
1 Via serial bus (bit D0, Mute Byte)
2 Directly on pin 22 through an I/O line of the
microcontroller
Very low DC stepping is obtained by use of a
BICMOS technology.
November 1999
ORDERING NUMBER: TDA7343 (DIP28)
TDA7343D (SO28)
DIP28
SO28
1/14
14
13
11
L1
L2
L1
L2
L3
10
R1
R2
R1
R2
R3
9
INPUT
SELECTOR
+
GAIN
LEFT
INPUTS
RIGHT
INPUTS
SUPPLY
2
31
ZERO
CROSS
+
MUTE
SOFT
MUTE
OUT(L)
IN(L)
17
16
LOUD+
VOL
ZERO
CROSS
+
MUTE
LOUD+
VOL
BASS
BASS
LOUD(L)
12
TREBLE
TREBLE
10
F
7
OUT(R)
CREF
IN(R)
68
LOUD(R)
BOUT(L)
BIN(L)
19
18
BOUT(R)
BIN(R)
21
20
5
TREBLE(R)
SPKR
ATT
MUTE
SPKR
ATT
MUTE
SPKR
ATT
MUTE
SPKR
ATT
MUTE
TREBLE(L)
4
24
28
27
25
26
23
OUT
LEFT
FRONT
OUT
LEFT
REAR
SCL
SDA
OUT
RIGHT
FRONT
OUT
RIGHT
REAR
D93AU062B
BUS
SERIAL
BUS
DECODER
+
LATCHES
2
x
1
F
C1
C2
C3
C4
C5
2
x
1
F
AGND
V
S
C6
C8
2.2
F
C7
2.2
F
C9
47nF
RB
C11
100nF
C12
100nF
R1
4.7K
C13
2.7nF
C10
100nF
C14
100nF
C15
100nF
C16
2.7nF
R2
4.7K
15
CSM
RB
CSM
22
SM
BLOCK DIAGRAM
TDA7343
2/14
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
10.5
V
T
amb
Operating Ambient Temperature
-40 to 85
C
T
stg
Storage Temperature Range
-55 to 150
C
THERMAL DATA
Symbol
Parameter
DIP28
SO28
Unit
R
th j-amb
Thermal Resistance Junction-pins
85
65
C/W
QUICK REFERENCE DATA
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
6
9
10.2
V
V
CL
Max. input signal handling
2.1
2.6
Vrms
THD
Total Harmonic Distortion V = 1Vrms f = 1KHz
0.01
0.08
%
S/N
Signal to Noise Ratio
106
dB
S
C
Channel Separation f = 1KHz
100
dB
Volume Control 0.3dB step
-59.7
20
dB
Treble Control 2dB step
-14
+14
dB
Bass Control 2dB step
-10
+18
dB
Fader and Balance Control 1.25dB step
-38.75
0
dB
Input Gain 3.75dB step
0
11.25
dB
Mute Attenuation
100
dB
IN(R)
OUT(R)
LOUD R
IN R2
IN R1
LOUD L
AM MONO
IN L2
IN L1
1
3
2
4
5
6
7
8
9
CSM
IN(L)
OUT(L)
BOUT(L)
BIN(L)
BIN(R)
BOUT(R)
SM
OUT RR
23
22
21
20
19
17
18
16
15
D94AU061B
10
11
12
13
14
28
27
26
25
24
CREF
V
S
GND
L
R
OUT LR
OUT RF
OUT LF
SDA
SCL
TREBLE
BUS
INPUTS
BASS
PIN CONNECTION
TDA7343
3/14
ELECTRICAL CHARACTERISTICS (V
S
= 9V; R
L
= 10K
; R
g
= 50
; T
amb
= 25
C; all controls flat
(G - 0dB); f = 1KHz. Refer to the test circuit, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
INPUT SELECTOR
R
I
Input Resistance
70
100
130
K
V
CL
Clipping Level
d
0.3%
2.1
2.6
V
RMS
S
I
Input Separation
80
100
dB
R
L
Output Load Resistance
2
K
G
I MIN
Minimum Input Gain
-0.75
0
0.75
dB
G
I MAX
Maximum Input Gain
10.25
11.25
12.25
dB
G
step
Step Resolution
2.75
3.75
4.75
dB
e
N
Input Noise
20Hz to 20 KHz unweighted
2.3
V
V
DC
DC Steps
Adiacent Gain Steps
1.5
10
mV
G
IMIN
to G
IMAX
3
mV
VOLUME CONTROL
R
I
Input Resistance
35
50
K
G
MAX
Maximum Gain
18.75
20
21.25
dB
A
MAX
Maximum Attenuation
57.7
59.7
62.7
dB
A
STEPC
Step Resolution Coarse
Attenuation
0.5
1.25
2.0
dB
A
STEPF
Step Resolution Fine Attenuation
0.11
0.31
0.51
dB
E
A
Attenuation Set Error
G = 20 to -20dB
-1.25
0
1.25
dB
G = -20 to -58dB
-3
2
dB
E
t
Tracking Error
2
dB
V
DC
DC Steps
Adiacent Attenuation Steps
-3
0
3
mV
From 0dB to A
MAX
0.5
5
mV
LOUDNESS CONTROL
R
I
Internal Resistor
Loud = ON
35
50
65
K
A
MAX
Maximum Attenuation
17.5
18.75
20.0
dB
A
step
Step Resolution
0.5
1.25
2.0
dB
ZERO CROSSING MUTE
V
TH
Zero Crossing Threshold
(note 1)
WIN = 11
20
mV
WIN = 10
40
mV
WIN = 01
80
mV
WIN = 00
160
mV
A
MUTE
Mute Attenuation
80
100
dB
V
DC
DC Step
0dB to Mute
0
3
mV
SOFT MUTE
A
MUTE
Mute Attenuation
60
dB
T
DON
ON Delay Time
C
CSM
= 22nF; 0 to -20dB; I = I
MAX
0.7
1
1.7
ms
C
CSM
= 22nF; 0 to -20dB; I = I
MIN
20
35
55
ms
T
DOFF
OFF Delay Time
V
CSM
= 0V; I = I
MAX
25
50
75
A
V
CSM
= 0V; I = I
MIN
1
A
V
THSM
Soft Mute Threshold
1.5
2.5
3.5
V
R
INT
Pullup Resistor (pin 22)
(note 2)
35
50
65
K
V
SMH
(pin 22) Level High
Soft Mute Active
3.5
V
V
SML
(pin 22) Level Low
1
V
TDA7343
4/14
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
BASS CONTROL
B
BOOST
Max Bass Boost
15
18
20
dB
B
CUT
Max Bass Cut
-8.5
-10
-11.5
dB
A
step
Step Resolution
1
2
3
dB
R
g
Internal Feedback Resistance
45
65
85
K
TREBLE CONTROL
C
RANGE
Control Range
13
14
15
dB
A
step
Step Resolution
1
2
3
dB
SPEAKER ATTENUATORS
C
RANGE
Control Range
35
37.5
40
dB
A
step
Step Resolution
0.5
1.25
2.0
dB
A
MUTE
Output Mute Attenuation
Data Word = XXX11111
80
100
dB
E
A
Attenuation Set Error
1.25
dB
V
DC
DC Steps
Adjacent Attenuation Steps
0
3
mV
AUDIO OUTPUT
V
clip
Clipping Level
d = 0.3%
2.1
2.6
Vrms
R
L
Output Load Resistance
2
K
R
O
Output Impedance
30
100
V
DC
DC Voltage Level
3.5
3.8
4.1
V
GENERAL
V
CC
Supply Voltage
6
9
10.2
V
I
CC
Supply Current
5
10
15
mA
PSRR
Power Supply Rejection Ratio
f = 1KHz
60
80
dB
B = 20 to 20kHz "A" weighted
65
dB
e
NO
Output Noise
Output Muted (B = 20 to 20kHz flat)
2.5
V
All Gains 0dB (B = 20 to 20kHz flat)
5
15
V
E
t
Total Tracking Error
A
V
= 0 to -20dB
0
1
dB
A
V
= -20 to -60dB
0
2
dB
S/N
Signal to Noise Ratio
All Gains = 0dB; V
O
= 1V
rms
106
dB
S
C
Channel Separation
80
100
dB
d
Distortion
V
in
= 1V
0.01
0.08
%
BUS INPUTS
V
IL
Input Low Voltage
1
V
V
lN
Input High Voltage
3
V
I
lN
Input Current
VIN = 0.4V
-5
5
A
V
O
Output Voltage SDA
Acknowledge
I
O
= 1.6mA
0.4
0.8
V
Note 1: WIN represents the MUTE programming bit pair D
6
, D
5
for the zero crossing window threshold
Note 2: Internal pullup resistor to Vs/2; "LOW" = softmute active
TDA7343
5/14
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