TDA7313
DIGITAL CONTROLLED STEREO AUDIO PROCESSOR
WITH LOUDNESS
INPUT MULTIPLEXER:
- 3 STEREO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTION TO DIFFERENT SOURCES
INPUT
AND
OUTPUT
FOR
EXTERNAL
EQUALIZER OR NOISE REDUCTION SYS-
TEM
LOUDNESS FUNCTION
VOLUME CONTROL IN 1.25dB STEPS
TREBLE AND BASS CONTROL
FOUR SPEAKER ATTENUATORS:
- 4 INDEPENDENT SPEAKERS CONTROL
IN 1.25dB STEPS FOR BALANCE AND
FADER FACILITIES
- INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL I
2
C BUS
DESCRIPTION
The TDA7313 is a volume, tone (bass and treble)
balance (Left/Right) and fader (front/rear) processor
for quality audio applications in car radio and Hi-Fi
systems.
Selectable input gain and external loudness function
are provided. Control is accomplished by serial I
2
C
bus microprocessor interface.
The AC signal setting is obtained by resistor networks
andswitches combined with operationalamplifiers.
Thanks to the used BIPOLAR/CMOS Tecnology,
Low Distortion, Low Noise and Low DC stepping are
obtained.
November 1999
DIP28
SO28
ORDERING NUMBERS:
TDA7313
TDA7313D
PIN CONNECTION (Top view)
1/14
THERMAL DATA
Symbol
Description
SO28
DIP28
Unit
R
th j-pins
Thermal Resistance Junction-pins
max
85
65
C/W
QUICK REFERENCE DATA
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
6
9
10
V
V
CL
Max. input signal handling
2
Vrms
THD
Total Harmonic Distortion V = 1Vrms f = 1KHz
0.01
0.1
%
S/N
Signal to Noise Ratio
106
dB
S
C
Channel Separation f = 1KHz
103
dB
Volume Control
1.25dB step
-78.75
0
dB
Bass and Treble Control
2db step
-14
+14
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
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
10.2
V
T
amb
Operating Ambient Temperature
-40 to 85
C
T
stg
Storage Temperature Range
-55 to +150
C
TEST CIRCUIT
TDA7313
2/14
L1
15
L1
L2
14
L2
L3
13
L3
INPUT
SELECTOR
+
GAIN
C1
C2
C3
LEFT
INPUTS
3x
2.2
F
SUPPLY
R3
9
R3
R2
10
R2
R1
11
R1
C4
C5
C6
3x
2.2
F
RIGHT
INPUTS
231
V
CC
AGND
CREF
C9
2.2
F
OUT(L)
IN(L)
17
16
VOL
+
LOUD
LOUD(L)
12
100nF
C14
BASS
19
5.6K
R2
BOUT(L)
18
BIN(L)
100nF
C15
RB
TREBLE
C17
2.7nF
TREBLE(L)
4
MUTE
D94AU180
SERIAL
BUS
DECODER
+
LATCHES
SPKR
ATT
25
VOL
+
LOUD
BASS
TREBLE
OUT(R)
IN(R)
C8
2.2
F
76
100nF
C12
100nF
C13
5.6K
R1
BOUT(R)
BIN(R)
21
20
RB
2.7nF
C16
TREBLE(R)
MUTE
SPKR
ATT
28
27
26
22
SCL
SDA
DIGGND
BUS
OUT
RIGHT
REAR
OUT
LEFT
FRONT
5
22
F
C7
8
LOUD(R)
C11
100nF
100nF
C10
MUTE
SPKR
ATT
OUT
LEFT
REAR
23
MUTE
SPKR
ATT
OUT
RIGHT
FRONT
24
BLOCK DIAGRAM
TDA7313
3/14
ELECTRICAL CHARACTERISTICS (refer to the test circuit T
amb
= 25
C, V
S
= 9V, R
L
= 10K
,
R
G
= 600
, all controls flat (G = 0), f = 1KHz unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY
V
S
Supply Voltage
6
9
10
V
I
S
Supply Current
8
11
mA
SVR
Ripple Rejection
60
80
dB
INPUT SELECTORS
R
II
Input Resistance
Input 1, 2, 3
35
50
70
K
V
CL
Clipping Level
2
2.5
Vrms
S
IN
Input Separation (2)
80
100
dB
R
L
Output Load resistance
pin 7, 17
2
K
G
INmin
Min. Input Gain
-1
0
1
dB
G
INmax
Max. Input Gain
11.25
dB
G
STEP
Step Resolution
3.75
dB
e
IN
Input Noise
G = 11.25dB
2
V
V
DC
DC Steps
adjacent gain steps
4
20
mV
G = 18.75 to Mute
4
mV
VOLUME CONTROL
R
IV
Input Resistance
20
33
50
k
C
RANGE
Control Range
70
75
80
dB
A
VMIN
Min. Attenuation
-1
0
1
dB
A
VMAX
Max. Attenuation
70
75
80
dB
A
STEP
Step Resolution
0.5
1.25
1.75
dB
E
A
Attenuation Set Error
Av = 0 to -20dB
Av = -20 to -60dB
-1.25
-3
0
1.25
2
dB
dB
E
T
Tracking Error
2
dB
V
DC
DC Steps
adjacent attenuation steps
From 0dB to Av max
0
0.5
3
7.5
mV
mV
SPEAKER ATTENUATORS
C
range
Control Range
35
37.5
40
dB
S
STEP
Step Resolution
0.5
1.25
1.75
dB
E
A
Attenuation set error
1.5
dB
A
MUTE
Output Mute Attenuation
80
100
dB
V
DC
DC Steps
adjacent att. steps
from 0 to mute
0
1
3
10
mV
mV
BASS CONTROL (1)
Gb
Control Range
Max. Boost/cut
+12
+14
+16
dB
B
STEP
Step Resolution
1
2
3
dB
R
B
Internal Feedback Resistance
34
44
58
K
TREBLE CONTROL (1)
Gt
Control Range
Max. Boost/cut
+13
+14
+15
dB
T
STEP
Step Resolution
1
2
3
dB
TDA7313
4/14
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
AUDIO OUTPUTS
V
OCL
Clipping Level
d = 0.3%
2
2.5
Vrms
R
L
Output Load Resistance
2
K
C
L
Output Load Capacitance
10
nF
R
OUT
Output resistance
30
75
120
V
OUT
DC Voltage Level
4.2
4.5
4.8
V
GENERAL
e
NO
Output Noise
BW = 20-20KHz, flat
output muted
all gains = 0dB
2.5
5
15
V
V
A curve all gains = 0dB
3
V
S/N
Signal to Noise Ratio
all gains = 0dB; V
O
= 1Vrms
106
dB
d
Distortion
A
V
= 0, V
IN
= 1Vrms
A
V
= -20dB V
IN
= 1Vrms
V
IN
= 0.3Vrms
0.01
0.09
0.04
0.1
0.3
%
%
%
Sc
Channel Separation left/right
80
103
dB
Total Tracking error
A
V
= 0 to -20dB
-20 to -60 dB
0
0
1
2
dB
dB
BUS INPUTS
V
IL
Input Low Voltage
1
V
V
IH
Input High Voltage
3
V
I
IN
Input Current
-5
+5
A
V
O
Output Voltage SDA
Acknowledge
I
O
= 1.6mA
0.4
V
Notes:
(1) Bass and Treble response see attached diagram (fig.16). The center frequency and quality of the resonance behaviour can be choosen by
the external circuitry. A standard first order bass response can be realized by a standard feedback network
(2) The selected input is grounded thru the 2.2
F capacitor.
Figure 2: Loudnessvs. Frequency (C
LOUD
=
100nF) vs. Volume Attenuation
Figure 1: Loudness vs. Volume Attenuation
TDA7313
5/14
PDF 
ZIP