SGS Thomson Microelectronics TDA7315, TDA7315D Datasheet
DIGITAL CONTROLLED AUDIO PROCESSOR
1 STEREOINPUT
LOUDNESSFUNCTION
VOLUMECONTROLIN 1.25dB STEPS
TREBLEAND BASSCONTROL
TWOSPEAKERSATTENUATORS:
- INDEPENDENTSPEAKERSCONTROL
IN 1.25dB STEPS
- INDEPENDENTMUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS
DESCRIPTION
The TDA 7315 is a volume, tone (bass and treble)
balance(Left/Right)processorforqualityaudioapplicationsincarradioandHi-Fisystems.
Controlisaccomplishedbyserial busmicroprocessor
interface.
TheAC signalsettingis obtainedbyresistornetworks
TDA7315
SO20
ORDERING NUMBER: TDA7315 (DIP20)
and switc hes com bined with operational amplifiers.
Thanks to the used BIPOLAR /C M OS Technol ogy,
LowDistortion, Low Noiseand DC steppingare obtained.
DIP 20
TDA7315D (SO 20)
BLOCK DIAGRAM
July 1998
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TDA7315
PIN CONNECTION (Topview)
THERMAL DATA
Symbol Parameter SO 20 DIP 20 Unit
R
thj-pins
Thermal Resistance Junction-pins Max. 150 150 °C/W
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
T
amb
T
stg
Operating Supply Voltage 10.2 V
S
Operating Ambient Temperature -10 to 85 °C
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 1.25dB step -78.75 0 dB
Bass and TrebleControl 2db step -14 +14 dB
Balance Control 1.25dB step -38.75 0 dB
Mute Attenuation 100 dB
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TEST CIRCUIT
TDA7315
ELECTRICAL CHARACTERISTICS (refer to the test circuit T
=25°C, VS= 9V, RL= 10KΩ,RG=
amb
600Ω, all controls 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
VOLUMECONTROL
R
IV
C
RANGE
A
VMIN
A
VMAX
A
STEP
E
A
E
T
V
DC
Input Resistance 20 33 50 k
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
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
3
10
BASS CONTROL (1)
Gb ControlRange Max. Boost/cut +12 +14 +16 dB
B
STEP
R
B
Step Resolution 1 2 3 dB
Internal Feedback Resistance 34 44 58 KΩ
Ω
dB
dB
mV
mV
mV
mV
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TDA7315
ELECTRICALCHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
TREBLECONTROL (1)
Gt ControlRange Max. Boost/cut +13 +14 +15 dB
T
STEP
AUDIO OUTPUTS
Step Resolution 1 2 3 dB
V
OCL
R
L
C
L
R
OUT
V
OUT
Clipping Level d = 0.3% 2 2.5 Vrms
Output LoadResistance 2 KΩ
Output LoadCapacitance 10 nF
Output resistance 30 75 120 Ω
DC Voltage Level 4.2 4.5 4.8 V
GENERAL
e
NO
S/N Signal to Noise Ratio all gains = 0dB; V
d Distortion A
Sc Channel Separation left/right 80 103 dB
Output Noise BW = 20-20KHz, flat
output muted
all gains = 0dB
A curve all gains = 0dB 3 µV
O
=0,VIN= 1Vrms
V
A
= -20dB VIN= 1Vrms
Total Tracking error A
V
= 0 to -20dB
V
V
= 0.3Vrms
IN
-20 to -60 dB
2.5
515
µ
µV
= 1Vrms 106 dB
0.01
0.09
0.04
0
0
0.1
0.3
1
2
%
%
%
dB
dB
V
BUS INPUTS
V
IL
V
IH
I
IN
V
O
Note:
(1) Bass and Treble response seeattached diagram (fig.19). The center frequencyand quality of the resonance behaviour can be choosenby
the external circuitry. A standard first order bass response can be realized by a standard feedback network.
Figure 1: LoudnessversusVolume Attenuation
Input Low Voltage 1V
Input High Voltage 3 V
Input Current -5 +5 µA
Output VoltageSDA
IO= 1.6mA 0.4 V
Acknowledge
Figure2: Loudnessversus Frequency
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