TDA4443
MULTISTANDARD VIDEO IF AMPLIFIER
.
.
.
.
.
.
.
.
.
.
.
.
.
SWITCHING OFF THE IF AMPLIFIER WHEN
OPERATING IN VTR MODE
DEMODULATION OF NEGATIVE OR POSI-
TIVE IF SIGNALS. THE OUTPUT REMAINS
ON THE SAME POLARITY IN EVERY CASE
IF AGC AUTOMATICALLY ADJUSTED TO
THE ACTUAL STANDARD
TWO AGC POSSIBILITIES FOR B/G MODE :
1. GATED AGC
2. UNGATED AGC ON SYNC. LEVEL AND
CONTROLLED DISCHARGE DEPENDENT
ON THE AVERAGE SIGNAL LEVEL FOR VTR
AND PERI TV APPLICATIONS
FOR STANDARD L : FAST AGC ON PEAK
WHITE BY CONTROLLED DISCHARGE
POSITIVE OR NEGATIVE GATING PULSE
EXTREMELY HIGH INPUT SENSITIVITY
LOW DIFFERENTIAL DISTORTION
CONSTANT INPUT IMPEDANCE
VERY HIGH SUPPLY VOLTAGE REJECTION
FEW EXTERNAL COMPONENTS
LOW IMPEDANCE VIDEO OUTPUT
SMALL TOLERANCES OF THE FIXED VIDEO
SIGNAL AMPLITUDE
ADJUSTABLE, DELAYED AGC FOR PNP
TUNERS
DESCRIPTION
The TDA4443 is a Video IF amplifier with standard
switch for multistandard colour or monochrome TV
sets, and VTR’s.
DIP16
(Plastic Package)
ORDER CODE :
TDA4443
PIN CONNECTIONS
IF INPUT
STANDARD SWITCHING
GROUND
IF AGC TIME CONSTANT
DELAYED TUNER AGC OUTPUT
TUNER AGC ADJUST
GATING PULSE INPUT
REFERENCE LC NETWORK
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IF INPUT
GROUND
NOT TO BE CONNECTED
SUPPLY VOLTAGE V
CC
NOT TO BE CONNECTED
VIDEO SIGNAL OUTPUT
DISCHARGE TIME CONSTANT
REFERENCE LC NETWORK
4443-01.EPS
December 1992
1/7
STMICROELECTRONICS [ STMICROELECTRONICS ]
