Philips tda7314 DATASHEETS
®
DIGITAL CONTROLLED AUDIO PROCESSOR
1 STERE O INPU T
SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTION TO DIFFERENT SOURCES
INPUT AND OUTPUT FOR EXTERNAL
EQUALIZER OR NOISE REDUCTION SYSTEM
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 FUN CTIONS PROGR AMMABLE VI A SE-
RIAL BUS
DESCRIPTION
The TDA7314 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
system s.
TDA7314
WITH LOUDNESS
SDIP24
ORDERING NUMBER: TDA7314
Selectable input gain and internal loudness function
are provided. Control is accomplished by serial bus
microproce ss or i nterfac e.
The AC signal s etting is obtained by r esistor netwo rks
and switches c ombin ed with opera tional ampl ifiers.
Thanks to the used BIPOLAR/CMOS Tecnology,
Low Distortion, Low Noise and DC stepping are obtained.
PIN CONNECTION
November 1999
(Top view)
1/12
TDA7314
TEST CIRCUIT
THERMAL DATA
Symbol Description Value Unit
R
th j-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 °C
Storage Temperature Range -55 to +150 °C
QUICK REFERENCE DATA
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 Treble Control 2db step -14 +14 dB
Fader and Balance Control 1.25dB step -38.75 0 dB
Input Gain 6.25dB step 0 18.75 dB
Mute Attenuation 100 dB
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, all controls flat (G = 0), f = 1KHz unless otherwise specified)
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 ST AGE
G
G
G
R
V
CL
R
INmin
INmax
STEP
e
IN
V
DC
II
L
Input Resistance Pin 9, 11 35 50 70 KΩ
Clipping Level 2 2.5 Vrms
Output Load resistance 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
VOLUME CONTROL
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 = 0 to -20dB
Av = -20 to -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
SPEAKER ATTENUATORS
dB
dB
mV
mV
C
S
A
range
STEP
E
A
MUTE
V
DC
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
TREBLE CONTROL (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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