TDA4427 ,VIDEO IF Amplifier with Demodulator and AFCr SGS-nm ON
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TDA4426
TDA4427
VIDEO F AMPLIFIER WITH DEMODULAT ..
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TDA4427
VIDEO IF Amplifier with Demodulator and AFC
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TDA4426
TDA4427
VIDEO F AMPLIFIER WITH DEMODULATOR AND AFC
u SYNCHRONOUS DEMODULATORS
u GAIN CONTROLLED AMPLIFIER
a VERY HIGH INPUT SENSITIVITY
n CONSTANT INPUT IMPEDANCE INDEPEN-
DENT OF AGC
n FIXED VIDEO OUTPUT VOLTAGE WITH
SMALL TOLERANCE RANGE
u SWITCHABLE AFC
n POSITIVE OR NEGATIVE AGC GATING
a VERY FEW EXTERNAL COMPONENTS
u OUTPUT VIDEO SIGNAL NO MUCH AF-
FECTED BY SUPPLY VOLTAGE VARIATIONS
u THETDA4426ANDTDA4427GETDIFFERENT
AFC CURVES (inverted AFC for TDA4427)
DESCRIPTION
The TDA4426 and TDA4427 are IF amplifier and
A.M. demodulator circuits for colour or black and
white television receiver using PNP tuner. They are
intended for reception of negative or positive modu-
lation CCIR standards.
PIN CONNECTION
TDA4426/TDA4427
(Plastic Package)
H1 U 18]
E2 17]
E3 165
E4 15]
Cs 14]
Le 13]
cs, 12]
E8 113
Cg IOC]
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- IF input
- Not to be connected
- Ground
- AGC filter capacitor
- Tuner AGC output
- Tuner AGC adjustment
- Pulse input for AGC gated
- Carrier tuned circuit output 1
- AFC tuned circuit output 1
- AFC tuned circuit output 2
- Carrier tuned circuit output 2
- AFC output
- Negative video output
- Positive video output
- Supply voltage
- Not to be connected
- Ground
- IF input
E88TDA4426-01
November 1988
TDA4426-TDA4427
APPLICATION CIRCUIT
. C--1.5pF PIN AND LEAD CAPACITOR
VIDEO OUTPUTS
25MF 10nF,--A----, AFC
" Hpos Ncg OUTPUT
DEMODULATOR
68pF 47pF
IF INPUT TDA 4426/27 "d 2:
ZOKA AFC
I l OFF
_ I vow
TUNER AGC *wF
I E88TDA4426-02
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Vcc Supply Voltage 15 V
vs Voltage at pin 5 Vcc V
V4 Voltage at Pin 4 5 V
I13 - IN Output Current to Ground Pins 13, 14. 30 mA
(source Current) Max : 1 s
I13 - I14 Output Current from Positive Supply Pins 13, 14. 5 mA
(sink current) Max : 1 s
TI Junction Temperature 125 ''C
Tamb Operating Ambient Temperature 0 to + 70 (
Tstg Storage Temperature - 25 to + 125 (
THERMAL DATA
Symbol Parameter Value Unit
Rudi-a) Junction - ambient Thermal Resistance 80 °C/W
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