SGS Thomson Microelectronics TDA7314 Datasheet
DIGITAL CONTROLLED AUDIO PROCESSOR
1 STEREOINPUT
SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTIONTO DIFFERENTSOURCES
INPUT AND OUTPUT FOR EXTERNAL
EQUALIZER OR NOISE REDUCTION SYSTEM
LOUDNESSFUNCTION
VOLUMECONTROLIN 1.25dB STEPS
TREBLEAND BASSCONTROL
FOURSPEAKER ATTENUATORS:
- 4 INDEPENDENTSPEAKERSCONTROL
IN 1.25dB STEPS FOR BALANCEAND
FADERFACILITIES
- INDEPENDENTMUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS
DESCRIPTION
The TDA 7314 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.
TDA7314
WITH LOUDNESS
SDIP24
ORDERING NUMBER: TDA7314
Selectable input gain and internalloudness function
are provid ed. Control is accomplished by serial bus
microprocessorinterface.
TheAC signalsettingis obtainedbyresis tornetwo rks
andswitchescombinedwithoperationalamplifiers.
Thanks to the used BIPOLAR/CMOS Tecnology ,
LowDistortion, Low Noiseand DC steppingare obtained.
PIN CONNECTION (Topview)
November 1999
1/12
TDA7314
TEST CIRCUIT
THERMAL DATA
Symbol Description Value Unit
R
thj-pins
Thermal Resistance Junction-pins Max. 65 °C/W
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
T
amb
T
stg
Operating Supply Voltage 10.2 V
S
Operating Ambient Temperature -40 to 85
Storage Temperature Range -55 to +150 °C
QUICK REFERENCEDATA
Symbol Parameter Min. Typ. Max. Unit
V
V
CL
THD Total Harmonic Distortion V = 1Vrms f = 1KHz 0.01 0.1 %
S/N Signal to Noise Ratio 106 dB
S
Supply Voltage 6 9 10 V
S
Max. input signal handling 2 Vrms
Channel Separation f = 1KHz 103 dB
C
Volume Control 1.25dBstep -78.75 0 dB
Bass and TrebleControl 2db step -14 +14 dB
Fader and Balance Control 1.25dB step -38.75 0 dB
Input Gain 6.25dBstep 0 18.75 dB
Mute Attenuation 100 dB
C
°
2/12
BLOCK DIAGRAM
TDA7314
3/12
TDA7314
ELECTRICAL CHARACTERISTICS (refer to the test circuit T
=25°C, VS= 9V, RL= 10KΩ,RG=
amb
600Ω, allcontrols flat(G = 0), f = 1KHz unless otherwisespecified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
S
I
S
SVR Ripple Rejection 60 80 dB
Supply Voltage 6 9 10 V
Supply Current 8 11 mA
INPUT STAGE
G
G
G
R
V
CL
R
INmin
INmax
STEP
e
IN
V
DC
II
L
Input Resistance Pin 9, 11 35 50 70 K
Clipping Level 2 2.5 Vrms
Output Loadresistance pin 7, 17 2 KΩ
Min. Input Gain -1 0 1 dB
Max. Input Gain 18.75 dB
Step Resolution 6.25 dB
Input Noise G = 18.75dB 2 µV
DC Steps adjacent gain steps 4 20 mV
G = 18.75 to Mute 4 mV
VOLUMECONTROL
R
IV
C
RANGE
A
VMIN
A
VMAX
A
STEP
E
A
E
T
V
DC
Input Resistance 20 33 50 kΩ
Control Range 70 75 80 dB
Min. Attenuation -1 0 1 dB
Max. Attenuation 70 75 80 dB
Step Resolution 0.5 1.25 1.75 dB
Attenuation Set Error Av = 0to -20dB
Av = -20to -60dB
-1.25
-3
0 1.25
2
Tracking Error 2dB
DC Steps adjacent attenuation steps
From 0dB to Av max
0
0.5
3
7.5
SPEAKERATTENUATORS
Ω
dB
dB
mV
mV
C
S
A
range
STEP
E
MUTE
V
DC
A
Control Range 35 37.5 40 dB
Step Resolution 0.5 1.25 1.75 dB
Attenuation set error 1.5 dB
Output Mute Attenuation 80 100 dB
DC Steps adjacent att. steps
from 0 to mute
0
1
BASS CONTROL (1)
Gb Control Range Max. Boost/cut +12 +14 +16 dB
B
STEP
R
B
Step Resolution 1 2 3 dB
Internal Feedback Resistance 34 44 58 KΩ
TREBLECONTROL (1)
Gt Control Range Max. Boost/cut +13 +14 +15 dB
Step Resolution 1 2 3 dB
4/12
T
STEP
10
3
mV
mV
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