TDA8120B Datasheet, PDF (1/6 Pages) STMicroelectronics – MULTISTANDARD VIDEO AND SOUND IF SYSTEM

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
1
2
CARRIER TUNING
3
SUPPLY VOLTAGE V_S1
4
2nd IF SOUND OUT (QSS)
5
6
GND
7
VIDEO OUTPUT
8
SUPPLY VOLTAGE V_S2
9
AGC TIME CONSTANT T_2V
10
11
CARRIER TUNING
12
24
AGC TIME CONSTANT T_2S
23
AGC TIME CONSTANT T_1S
22
STANDARD SWITCH
21
QSS OR AM INPUT
20
19
GND
18
17
VIDEO IF INPUT
16
15
AGC TIME CONSTANT T_1V
AND VIDEO MUTING
14
TUNER AGC OUTPUT
13
TUNER AGC DELAY
October 1993
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