®
TDA7313N
DIGITAL CONTROLLED STEREO AUDIO PROCESSOR
WITH LOUDNESS
INPUT MULTIPLEXER:
- 3 STEREO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTION TO DIFFERENT SOURCES
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 TDA7313N 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
DIP28
SO28
ORDERING NUMBERS:
TDA7313N
TDA7313ND
are provided. Control is accomplished by serial
I
2
C bus microprocessor interface.
The AC signal setting is obtained by resistor networks
and switches combined with operational amplifiers.
Thanks to the used BIPOLAR/CMOS Tecnology,
Low Distortion, Low Noise and Low DC stepping are
obtained.
PIN CONNECTION
(Top view)
November 1999
1/14
TDA7313N
TEST CIRCUIT
THERMAL DATA
Symbol
R
th j-pins
Description
Thermal Resistance Junction-pins
max
SO28
85
DIP28
65
Unit
°C/W
ABSOLUTE MAXIMUM RATINGS
Symbol
V
S
T
amb
T
stg
Parameter
Operating Supply Voltage
Operating Ambient Temperature
Storage Temperature Range
Value
10.2
-40 to 85
-55 to +150
Unit
V
°C
°C
QUICK REFERENCE DATA
Symbol
V
S
V
CL
THD
S/N
S
C
Supply Voltage
Max. input signal handling
Total Harmonic Distortion V = 1Vrms f = 1KHz
Signal to Noise Ratio
Channel Separation f = 1KHz
Volume Control
1.25dB step
2db step
1.25dB step
-78.75
-14
-38.75
0
100
Bass and Treble Control
Parameter
Min.
6
2
Typ.
9
0.01
106
103
0
+14
0
11.25
Max.
10
0.1
Unit
V
Vrms
%
dB
dB
dB
dB
dB
dB
dB
Fader and Balance Control
Input Gain 3.75dB step
Mute Attenuation
2/14
5.6K
C17
2.7nF
100nF
C15
BIN(L)
TREBLE(L)
4
SPKR
ATT
25
MUTE
OUT LEFT
FRONT
R2
C9 2.2µF
BLOCK DIAGRAM
OUT(L)
17
16
12
19
18
IN(L)
C11
100nF
100nF
C14
LOUD(L)
BOUT(L)
RB
3x
2.2µF
C1
L1
L1
VOL
+ LOUD
BASS
TREBLE
MUTE
SPKR
ATT
23
15
LEFT
INPUTS
L3
C2
L2
14
L2
C3
L3
13
OUT LEFT
REAR
28
SERIAL BUS DECODER + LATCHES
27
26
SCL
SDA
DIGGND
BUS
INPUT
SELECTOR
+ GAIN
R3
VOL
+ LOUD
BASS
TREBLE
C4
R3
9
RIGHT
INPUTS
R1
C5
R2
10
R2
SPKR
ATT
24
MUTE
OUT RIGHT
FRONT
C6
R1
11
3x
2.2µF
SPKR
ATT
RB
MUTE
1
CREF
C7
22µF
C8 2.2µF
OUT(R)
IN(R)
7
6
8
21
LOUD(R)
100nF
C12
100nF
C10
5.6K
R1
20
BOUT(R)
BIN(R)
100nF
C13
2.7nF
C16
5
TREBLE(R)
D98AU888
22
SUPPLY
3
OUT RIGHT
REAR
2
VS
AGND
TDA7313N
3/14
TDA7313N
ELECTRICAL CHARACTERISTICS
(refer to the test circuit T
amb
= 25°C, V
S
= 9V, R
L
= 10KΩ,
R
G
= 600Ω, all controls flat (G = 0), f = 1KHz unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY
V
S
I
S
SVR
Supply Voltage
Supply Current
Ripple Rejection
6
60
9
8
80
10
11
V
mA
dB
INPUT SELECTORS
R
II
V
CL
S
IN
R
L
G
INmin
G
INmax
G
STEP
e
IN
V
DC
Input Resistance
Clipping Level
Input Separation (2)
Output Load resistance
Min. Input Gain
Max. Input Gain
Step Resolution
Input Noise
DC Steps
G = 11.25dB
adjacent gain steps
G = 18.75 to Mute
pin 7, 17
Input 1, 2, 3
35
2
80
2
-1
50
2.5
100
0
11.25
3.75
2
4
4
20
1
70
KΩ
Vrms
dB
KΩ
dB
dB
dB
µV
mV
mV
VOLUME CONTROL
R
IV
C
RANGE
A
VMIN
A
VMAX
A
STEP
E
A
E
T
V
DC
Input Resistance
Control Range
Min. Attenuation
Max. Attenuation
Step Resolution
Attenuation Set Error
Tracking Error
DC Steps
adjacent attenuation steps
From 0dB to Av max
0
0.5
Av = 0 to -20dB
Av = -20 to -60dB
20
70
-1
70
0.5
-1.25
-3
33
75
0
75
1.25
0
50
80
1
80
1.75
1.25
2
2
3
7.5
kΩ
dB
dB
dB
dB
dB
dB
dB
mV
mV
SPEAKER ATTENUATORS
C
range
S
STEP
E
A
A
MUTE
V
DC
Control Range
Step Resolution
Attenuation set error
Output Mute Attenuation
DC Steps
adjacent att. steps
from 0 to mute
35
0.5
80
37.5
1.25
100
0
1
3
10
40
1.75
1.5
dB
dB
dB
dB
mV
mV
BASS CONTROL (1)
Gb
B
STEP
R
B
Control Range
Step Resolution
Internal Feedback Resistance
Max. Boost/cut
+12
1
34
+14
2
44
+16
3
58
dB
dB
KΩ
TREBLE CONTROL (1)
Gt
T
STEP
Control Range
Step Resolution
Max. Boost/cut
+13
1
+14
2
+15
3
dB
dB
4/14
TDA7313N
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
AUDIO OUTPUTS
V
OCL
R
L
C
L
R
OUT
V
OUT
Clipping Level
Output Load Resistance
Output Load Capacitance
Output resistance
DC Voltage Level
d = 0.3%
2
2
10
30
4.2
75
4.5
120
4.8
2.5
Vrms
KΩ
nF
Ω
V
GENERAL
e
NO
Output Noise
BW = 20-20KHz, flat
output muted
all gains = 0dB
A curve all gains = 0dB
S/N
d
Signal to Noise Ratio
Distortion
all gains = 0dB; V
O
= 1Vrms
A
V
= 0, V
IN
= 1Vrms
A
V
= -20dB V
IN
= 1Vrms
V
IN
= 0.3Vrms
80
A
V
= 0 to -20dB
-20 to -60 dB
2.5
5
3
106
0.01
0.09
0.04
103
0
0
0.1
0.3
µV
µV
µV
dB
%
%
%
dB
dB
dB
15
Sc
Channel Separation left/right
Total Tracking error
1
2
BUS INPUTS
V
IL
V
IH
I
IN
V
O
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 2.2µF capacitor.
Input Low Voltage
Input High Voltage
Input Current
Output Voltage SDA
Acknowledge
I
O
= 1.6mA
1
3
-5
+5
0.4
V
V
µA
V
Figure 1:
Loudness vs. Volume Attenuation
Figure 2:
Loudness vs. Frequency (C
LOUD
=
100nF) vs. Volume Attenuation
5/14
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