tda7313.pdf

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DIGITAL CONTROLLED STEREO AUDIO PROCESSOR WITH LOUDNESS
TDA7313
DIGITAL CONTROLLED STEREO AUDIO PROCESSOR
WITH LOUDNESS
ADVANCE DATA
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
DIP28
SO28
ORDERING NUMBERS:
TDA7313
TDA7313D
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
and switches combined with operational amplifiers.
Thanks to the used BIPOLAR/CMOS Tecnology,
Low Distortion, Low Noise and Low DC stepping are
obtained.
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
PIN CONNECTION (Top view)
February 1994
1/14
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
199643592.002.png
TDA7313
TEST CIRCUIT
THERMAL DATA
Symbol
Description
SO28
DIP28
Unit
R th j-pins
Thermal Resistance Junction-pins
max
85
65
°
C/W
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
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
2/14
199643592.003.png
TDA7313
BLOCK DIAGRAM
3/14
199643592.004.png
TDA7313
ELECTRICAL CHARACTERISTICS (refer to the test circuit T amb =25 ° C, V S = 9V, R L = 10K W ,
R G = 600 W , 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
W
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 W
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
m
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
W
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
W
TREBLE CONTROL (1)
Gt
Control Range
Max. Boost/cut
+13
+14
+15
dB
T STEP
Step Resolution
1
2
3
dB
4/14
199643592.005.png
TDA7313
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
W
C L
Output Load Capacitance
10
nF
R OUT
Output resistance
30
75
120
W
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
m
V
A curve all gains = 0dB
3
m 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
m
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
m
F capacitor.
Figure 1: Loudness vs. Volume Attenuation
Figure 2: Loudness vs. Frequency (C LOUD =
100nF) vs. Volume Attenuation
5/14
m
V
199643592.001.png

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