SGS Thomson Microelectronics TDA7311 Datasheet
SERIAL BUS CONTROLLED AUDIO PROCESSOR
INPUTMULTIPLEXER
– TWOSTEREODIFFERENTIAL INPUTS
– TWOSTEREOSINGLE ENDEDINPUTS
– ONE MONO DIFFERENTIAL INPUT
INPUT AND OUTPUT FOR EXTERNAL
EQUALIZER OR NOISE REDUCTION SYSTEM
VOLUMECONTROL IN 1.25dB STEPS
TREBLEAND BASS CONTROL
FOURSPEAKERATTENUATORS:
– 4 INDEPENDENTSPEAKERSCONTROL
IN 1.25dB STEPS FOR BALANCE AND
FADERFACILITIES
– INDEPENDENTMUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SPI
COMPATIBLESERIAL BUS
DESCRIPTION
The TDA7311 is a volume, tone (bass and treble)
and fader (front/rear) processor for high quality
audio applicationsin carradio and Hi-Fi systems.
TDA7311
DIP40
ORDERING NUMBER: TDA7311
Control is accomplished by serial bus microprocessorinterface.
The AC signal setting is obtained by resistor networks and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOStechnology,
low distortion, low noise and DC stepping are obtained.
PINS CONNECTION
July 1999
(Top view)
1/11
TDA7311
TEST CIRCUIT
THERMAL DATA
Symbol Description DIP40 Unit
R
thj-pins
Thermal Resistance Junction-pins max 85
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
T
T
Operating Supply Voltage 11.2 V
S
Operating Temperature Range -40 to 85
op
Storage Temperature Range -55 to +150
stg
QUICK REFERENCE DATA
Symbol Parameter Min. Typ. Max. Unit
V
V
CL
THD Total Harmonic Distortion V = 1Vrms f = 1KHz 0.01 %
S/N Signal to Noise Ratio 106 dB
S
BR
Supply Voltage 8 10 11 V
S
Max. input signal handling 2.3 Vrms
Channel Separation f = 1KHz 95 dB
C
Volume Control 1.25dB step -78.75 +11.25 dB
Treble Control 2dB step -14 +14 dB
Bass Control 2dB step –20 +20 dB
SS
Fader and Balance Control 1.25dB step -38.75 0 dB
Mute Attenuation 92 dB
C/W
°
°
°
C
C
2/11
BLOCK DIAGRAM
TDA7311
ATT
SPKR
OUT
LEFT REAR
16
TREBLE
VOL BASS
MUTE
CLDACE
201918
DIG GND
21
SPI BUS DECODER + LATCHES
OUT
LEFT FRONT
15
ATT
SPKR
14
12 13
MUTE
ATT
SPKR
OUT
RIGHT FRONT
26
MUTE
VOL BASS TREBLE
ATT
SPKR
OUT
25
RIGHT REAR
MUTE
SUPPLY
1402
27
AN-GND CREF
CC
V
10 11
SECMUTE
9
8
4
IN4
IN3
DIFF
5
STEREO 1
LEFT
INPUTS
7
DIFF
6
STEREO 2
38
3
DIFF MONO
SECMUTE
34
DIFF
STEREO 2
35
37
36
DIFF
STEREO 1
RIGHT
INPUTS
31 30 29 28
33
IN3
D94AU178
32
IN4
3/11
TDA7311
ELECTRICALCHARACTERISTICS (T
=25°C,VCC= 10V, RL= 10KΩ,RG= 600Ω,GV=0dB,
amb
f = 1KHzunless otherwise specified)(referto thetest circuit)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
S
I
S
SVR Ripple Rejection 55 80 dB
Supply Voltage 8 10 11 V
Supply Current 15 20 mA
INPUT SELECTORS
R
II
V
CL
CMRR Common Mode Rejection Differential Inputs 65 dB
INS Input Separation (2) 70 90 dB
R
L
C
L
R
O
G
IN
Input Resistance Single Ended inputs 30 50 70 K
Differential Inputs 10 20 KΩ
Clipping Level Single Ended Inputs 2.3 2.8 Vrms
Differential Inputs 4.6 5.6 Vrms
Output Load resistance 2 K
Output Load capacitance 1 nF
Output Impedance 15 50 Ω
Input Gain Single Ended Inputs -1 0 1 dB
differential Inputs -7 -6 -5 dB
VOLUMECONTROL
Ω
Ω
R
IN
G
R
Input Resistance 15 30 k
Control Range Max. Attenuation – 75 dB
Max. Gain +11.25 dB
A
STEP
E
A
E
T
V
DC
Step Resolution 1.25 dB
Attenuation Set Error AV= +11.25 to -20dB
A
= -20 to -60dB
V
-1.25
-3
0 1.25
2
Tracking Error 2dB
DC Steps adjacent attenuationsteps
From 0dB to A
Vmax
0
1
3.0
10.0mVmV
Vimax. Max. Input Voltage 2.3 2.8 Vrms
SPEAKERATTENUATORS
A
R
A
step
E
A
V
DC
Control Range 37.5 dB
Step Resolution 1.25 dB
Attenuation set error 1.5 dB
DC Steps adjacent att.steps
from 0 to mute
0
1
BASS CONTROL(1)
Control Range +20 dB
Step Resolution 2 dB
Attenuation / Gain set error –2.0 2.0 dB
TREBLECONTROL(1)
Ω
dB
dB
mV
mV
4/11
Control Range +14 dB
Step Resolution 2.0 dB
Attenuation / Gain set error –1.0 0 1.0 dB
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