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STMicroelectronics Electronic Components Datasheet

TDA8120B Datasheet

Multistandard Video And Sound if System

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TDA8120B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM
. GAIN CONTROLLED IF AMPLIFIER
. VIF OPERATING FREQUENCY UP TO
50MHz
. SYNCHRONOUS DETECTOR
. WHITE SPOT INVERTER
. VERY LOW DIFFERENTIAL ERROR
. VERY LOW PHASE ERROR
. INTERNAL AGC SWITCH (B/G - L)
. AGC TOP. SYNCH. FOR STANDARD B/G
. AGC TOP WHITE FOR STANDARD L
. QUASI SPLIT SOUND FOR STANDARD B/G
. SOUND DETECTOR FOR STANDARD L
. VIDEO MUTING FACILITY
. SEPARATED SOUND OUTPUT
. OPERATES WITHOUT EXTERNAL GATING
PULSE
The Sound IF section acts as a Quasi Split Sound
(QSS) subsystem in B/G transmission and allows
a second Sound IF with high rejection of the video
information.
The DC switch can modify the Sound IF configura-
tion to process AM modulated Sound signals (L).
The TDA8120B is assembled in a 24 pin dual in line
power package.
DESCRIPTION
The TDA8120B is a monolithic IC for TV video IF
and Sound IF amplification and demodulation that
can operate with all the TV standards.
The Video IF section can handle negative (B/G) or
positive (L) modulated video signals by means of
DC switching.
PIN CONNECTIONS
DIP24
(Plastic Package)
ORDER CODE : TDA8120B
AF AM OUT
CARRIER TUNING
SUPPLY VOLTAGE VS1
2nd IF SOUND OUT (QSS)
GND
VIDEO OUTPUT
SUPPLY VOLTAGE VS2
AGC TIME CONSTANT T2V
CARRIER TUNING
1
2
3
4
5
6
7
8
9
10
11
12
24 AGC TIME CONSTANT T2S
23 AGC TIME CONSTANT T1S
22 STANDARD SWITCH
21
QSS OR AM INPUT
20
19
GND
18
17
VIDEO IF INPUT
16
15
AGC TIME CONSTANT T1V
AND VIDEO MUTING
14 TUNER AGC OUTPUT
13 TUNER AGC DELAY
October 1993
1/6


STMicroelectronics Electronic Components Datasheet

TDA8120B Datasheet

Multistandard Video And Sound if System

No Preview Available !

TDA8120B pdf
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TDA8120B
BLOCK DIAGRAM
11 12
STANDARD SSW
22 SWITCH
LIMITER
(B/G or L)
18
16
VIF AMP
(3 STAGES)
17
14 AGC AMPLIF.
AND
13 AGC DELAY
10
19
20
1st SIF AMP.
(3 STAGES)
21
23 AGC AMPLIF.
AND
24 AGC DELAY
1
AM or AGC
DETECTOR
SSW
SSW
PHASE
SHIFTER
(0° or 180°)
49
VOLTAGE
REGULATION
VIDEO
DEMOD.
AND BUFFER
WHITE SPOT INV.
NOISE INVERT
VIDEO PREAMP.
TOP SYNC CLAMP
or TOP WHITE CLAMP
MIN. VIDEO DETECTOR
SSW
VIDEO SECTION
BUFFER
LIMITER
LIMITER
AND PHASE
SHIFTER (90°)
2nd SIF
DEMOD.
SSW
SOUND SECTION
23
8
7
15
5
6
ABSOLUTE MAXIMUM RATINGS
Symbol
V4, V9
I8, I5, I1
I22, I15
Pto t
Tstg, Tj
V1 4
Parameter
Supply Voltage Vs
Video Out, QSSout, AF AM Out, DC Output Current
Pin 22 and Pin 15 Input Current
Total Power Dissipation (Tamb = 70 °C)
Storage and Junction Temperature
Voltage at Pin 14
THERMAL DATA
Symbol
Rth j–amb
Thermal Resistance
Parameter
Max
Value
15
10
1
2
– 40 to 150
Vs
Unit
V
mA
mA
W
°C
Value
40
Unit
°C/W
2/6


Part Number TDA8120B
Description Multistandard Video And Sound if System
Maker ST Microelectronics
Total Page 6 Pages
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