TDA2540 Datasheet, PDF (1/7 Pages) STMicroelectronics – IF AMPLIFIER WITH DEMODULATOR AND AFC

TDA2540
TDA2541
IF AMPLIFIER WITH DEMODULATOR AND AFC
. _{SUPPLY VOLTAGE : 12V TYP}
. _{SUPPLY CURRENT : 50mA TYP}
. _{I.F. INPUT VOLTAGE SENSITIVITY AT}
F = 38.9MHz : 85µV_RMS TYP
. VIDEO OUTPUT VOLTAGE (white at 10% of
top synchro) : 2.7V_PP TYP
. I.F. VOLTAGE GAIN CONTROL RANGE :
64dB TYP
. SIGNAL TO NOISE RATIO AT VI = 10mV :
58dB TYP
. A.F.C. OUTPUT VOLTAGE SWING FOR
∆f = 100kHz : 10V TYP
DESCRIPTION
The TDA2540 and 2541 are IF amplifier and A.M.
demodulator circuits for colour and black and white
television receivers using PNP or NPN tuners. They
are intended for reception of negative or positive
modulation CCIR standard.
They incorporate the following functions :
. _{Gain controlled amplifier}
. _{Synchronous demodulator}
. _{White spot inverter}
. _{Video preamplifier with noise protection}
. _{Switchable AFC}
. _{AGC with noise gating}
. _{Tuner AGC output (NPN tuner for 2540)-(PNP}
tuner for 2541)
. VCR switch for video output inhibition (VCR
play back)
PIN CONNECTIONS
DIP16
(Plastic Package)
ORDER CODE : TDA2540-TDA2541
IF INPUT
1
DECOUPLING CAPACITOR
2
TUNER AGC TAKE-OVER ADJUST
3
TUNER AGC OUTPUT
4
AFC OUTPUT
5
AFC SWITCH
6
AFC DEMODULATOR L.C. NETWORK
7
REFERENCE L.C. NETWORK
8
16
IF INPUT
15
DECOUPLING CAPACITOR
14
AGC CAPACITOR
13
GROUND
12
VIDEO OUTPUT
11
V_CC
10
AFC DEMODULATOR L.C. NETWORK
9
REFERENCE L.C. NETWORK
August 1992
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