TDA2540 ST Microelectronics, TDA2540 Datasheet

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TDA2540

Manufacturer Part Number
TDA2540
Description
IF AMPLIFIER WITH DEMODULATOR AND AFC
Manufacturer
ST Microelectronics
Datasheet

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Part Number:
TDA2540
Manufacturer:
ST
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Part Number:
TDA2540Q
Quantity:
48
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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.
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They incorporate the following functions :
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PIN CONNECTIONS
August 1992
SUPPLY VOLTAGE : 12V TYP
SUPPLY CURRENT : 50mA TYP
I.F.
F = 38.9MHz : 85 V
VIDEO OUTPUT VOLTAGE (white at 10% of
top synchro) : 2.7V
I.F. VOLTAGE GAIN CONTROL RANGE :
64dB TYP
SIGNAL TO NOISE RATIO AT V
58dB TYP
A.F.C. OUTPUT VOLTAGE SWING FOR
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)
f = 100kHz : 10V TYP
AFC DEMODULATOR L.C. NETWORK
INPUT
TUNER AGC TAKE-OVER ADJUST
REFERENCE L.C. NETWORK
DECOUPLING CAPACITOR
VOLTAGE
TUNER AGC OUTPUT
PP
RMS
IF AMPLIFIER WITH DEMODULATOR AND AFC
TYP
AFC OUTPUT
AFC SWITCH
TYP
SENSITIVITY AT
IF INPUT
I
= 10mV :
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ORDER CODE : TDA2540-TDA2541
IF INPUT
DECOUPLING CAPACITOR
AGC CAPACITOR
GROUND
VIDEO OUTPUT
V
AFC DEMODULATOR L.C. NETWORK
REFERENCE L.C. NETWORK
CC
(Plastic Package)
DIP16
TDA2540
TDA2541
1/7

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TDA2540 Summary of contents

Page 1

... 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. ...

Page 2

... TDA2540 - TDA2541 BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol V (11–13) Supply Voltage V (4–13) Tuner A.G.C. Voltage P Power Dissipation tot T Storage Temperature stg T Operating Ambient Temperature amb THERMAL DATA Symbol R Junction - ambient Thermal Resistance th (j-a) ELECTRICAL OPERATING CHARACTERISTICS 12V 38.9MHz (unless otherwise specified) ...

Page 3

... Note : RMS at B 5MHz N Figure 1 : Video Output Waveform Showing White Spot and Noise Inverter Threshold Levels Parameter = 10mV) (see note 1) = 10mV 10mV 11V 12V 4- 12V 4-13 TDA2540 - TDA2541 Min. Typ. Max. Unit MHz RMS ...

Page 4

... TDA2540 - TDA2541 Figure 2 : Input Conditions for Intermodulation Measurements Figure 3 : Test Set-up for Intermodulation 4/7 ...

Page 5

... Figure 4 : AFC Voltage versus Frequency V Figure 6 : Signal/Noise Ratio versus Input Voltage V 1-16 Figure 7 : AGC Tuner Current Curve TDA2540 Figure 5 : AFC Voltage versus Frequency V 5-13 TDA2541 TDA2540 - TDA2541 5-13 5/7 ...

Page 6

... TDA2540 - TDA2541 Figure 7 : AGC Tuner Current Curve (continued) TDA2540 - TDA2541 APPLICATION CIRCUIT 6/7 ...

Page 7

... The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S. Typ. Max. Min. 0.020 1.65 0.030 0.5 0.25 20 8.5 2.54 17.78 7.1 5.1 3.3 1. system, is granted provided that the system conforms to C Standard Specifications as defined by Philips. TDA2540 - TDA2541 b1 E Inches Typ. Max. 0.065 0.020 0.010 0.787 0.335 0.100 0.700 0.280 0.201 0.130 0.050 7/7 ...

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