TDA2540
TDA2541
IFAMPLIFIER WITH DEMODULATOR AND AFC
August 1992
.SUPPLYVOLTAGE: 12V TYP
.SUPPLYCURRENT : 50mATYP
.I.F. INPUT VOLTAGE SENSITIVITY AT
F =38.9MHz : 85ยตVRMS TYP
.VIDEO OUTPUT VOLTAGE (white at 10% of
top synchro): 2.7VPP 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
โf = 100kHz : 10V TYP
DESCRIPTION
The TDA2540and 2541 are IF amplifier and A.M.
demodulatorcircuits for colourandblack and white
televisionreceiversusingPNPorNPNtuners.They
are intended for reception of negative or positive
modulationCCIR standard.
They incorporatethe followingfunctions :
.Gaincontrolled amplifier
.Synchronousdemodulator
.Whitespot inverter
.Video preamplifier with noise protection
.SwitchableAFC
.AGCwith noise gating
.Tuner AGC output (NPN tuner for 2540)-(PNP
tuner for2541)
.VCR switch for video output inhibition (VCR
play back)
DIP16
(Plastic Package)
ORDER CODE : TDA2540-TDA2541
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IF INPUT
DECOUPLINGCAPACITOR
TUNER AGC TAKE-OVERADJUST
TUNERAGC OUTPUT
AFCOUTPUT
AFC SWITCH
AFC DEMODULATORL.C. NETWORK
REFERENCEL.C. NETWORK
IF INPUT
DECOUPLINGCAPACITOR
AGC CAPACITOR
GROUND
VIDEO OUTPUT
VCC
AFCDEMODULATORL.C. NETWORK
REFERENCEL.C. NETWORK
2540-01.EPS
PIN CONNECTIONS
1/7
2540-02.TIF
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V (11โ13) Supply Voltage 13.8 V
V (4โ13) Tuner A.G.C. Voltage 12 V
Ptot Power Dissipation 900 mW
Tstg Storage Temperature โ 55 to + 125 ยฐC
Tamb Operating Ambient Temperature 0 to + 70 ยฐC
2540-01.TBL
THERMALDATA
Symbol Parameter Value Unit
Rth (j-a) Junction - ambient Thermal Resistance 70 ยฐC/W
2540-02.TBL
ELECTRICALOPERATING CHARACTERISTICS
Tamb =25
o
C;V
11โ13 = 12V; f = 38.9MHz (unless otherwise specified)
Symbol Parameter Min. Typ. Max. Unit
V11-13 Supply VoltageRange 10.2 12 13.8 V
I11 Supply Current 50 60 mA
V1-16 IF Input Voltage Sensitivity 60 85 180 ยตVRMS
Max Input Voltage (Pins 1-16) 140 mV
V12-13 Video Output Voltage 2.7 Vpp
Z1-16 Differential Input Impedance (inparallel with 2pF) 2 kโฆ
V12-13 Zero Signal Output Level 5.7 6 6.3 V
V12-13 Top Synchro Output Level 2.9 3.07 3.2 V
โGVIF Voltage GainControl Range 52 64 dB
2540-03.TBL
TDA2540 - TDA2541
2/7
ELECTRICALOPERATING CHARACTERISTICS (continued)
Tamb =25ยฐC; V (11 โ 13) = 12 V; f =38.9 MHz (unlessotherwise specified)
Symbol Parameter Min. Typ. Max. Unit
S/N Signal to Noise Ratio (VI= 10mV) (see note 1) 50 58 dB
B Bandwidth of Video Amplifier (โ 3dB) 6 MHz
dG Differential Gain 4 10 %
dฯDifferential Phase 2 10 %
V12-13 Carrier Signal at Video Output (VI= 10mV) 4 30 mVRMS
V12-13 2nd Harmonic of Carrier at Video Output (VI= 10mV) 20 30 mVRMS
Intermodulation at 1.1MHz (blue) (see Figures 2 and3) 46 60 dB
Intermodulation at 1.1MHz (yellow) (see Figures 2 and 3) 46 50 dB
Intermodulation at 3.3MHz (blue) (see Figures 2 and3) 46 54 dB
V14-13 VCR Switches Off Output at : (VCR = low Level) 1.1 V
White Spot InverterThreshold Level (see Figure 1) 6.6 V
White Spot Insertion Level (see Figure 1) 4.7 V
Noise Inverter ThresholdLevel (see Figure 1) 1.8 V
Noise Insertion Level (see Figure 1) 3.8 V
I4Tuner AGC output Current Range 0 to 10 mA
V14-13 Tuner AGC Output Voltage 0.3 V
I4Tuner AGC Output Leakage Current
TDA2541 V14-13 = 11V, V4-13 = 12V
TDA2540 V14-13 = 5V, V4-13 = 12V
15 ยตA
โV5-13 AFC Output Voltage Swing (โf = 100 kHz) 10 11 V
โf Change of Frequency at AFC Output (voltage swing of 10V) 100 200 kHz
V6-13 AFC Switches OFF (AFC = low level) at : 2.5 V
V6-13 AFC Switches LOW (AFC = High level) at : 3.2 V
V5-13 AFC Zero = Signal Output Voltage (minimum gain) 4 6 8 V
2540-04.TBL
Note : 1. S
N=VO(black to white)
VNโ
(RMS atB =5MHz)(dB)
2540-03.TIF
Figure1 : VideoOutput Waveform ShowingWhite Spotand Noise Inverter Threshold Levels
TDA2540- TDA2541
3/7
2540-04.EPS
Figure 2 : Input Conditionsfor IntermodulationMeasurements
2540-05.TIF
Figure3 : TestSet-up forIntermodulation
TDA2540 - TDA2541
4/7
2540-07.EPS
Figure 5 : AFC Voltageversus FrequencyV5-13
2540-06.EPS
Figure 4 : AFC Voltage versus Frequency V5-13
2540-08.EPS
Figure 6 : Signal/NoiseRatioversus Input
VoltageV1-16
Figure 7 : AGC Tuner Current Curve
2540-10.EPS
TDA2541
2540-09.EPS
TDA2540
TDA2540- TDA2541
5/7
2540-11.EPS
TDA2540 - TDA2541
2540-12.EPS
APPLICATION CIRCUIT
Figure 7 : AGC Tuner Current Curve (continued)
TDA2540 - TDA2541
6/7
Information furnishedis believed to be accurate and reliable. However, SGS-THOMSON Microelectronicsassumes no responsibility
for the consequences of use of such information nor for anyinfringement of patents or other rights of third partieswhich may result
from its use. No licence isgranted byimplication or otherwise under any patent or patentrights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components inlife
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
๏1994 SGS-THOMSON Microelectronics - All RightsReserved
Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips
I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conformsto
the I2C Standard Specifications as defined by Philips.
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - China- France - Germany - Hong Kong - Italy - Japan- Korea - Malaysia -Malta - Morocco
The Netherlands - Singapore - Spain - Sweden - Switzerland- Taiwan - Thailand - UnitedKingdom -U.S.A.
16
18
I
a1
L
Be
D
b
Z
e3
F
b1
E
9
PM-DIP16.EPS
PACKAGE MECHANICAL DATA
16 PINSโ PLASTICDIP
Dimensions Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
a1 0.51 0.020
B 0.77 1.65 0.030 0.065
b 0.5 0.020
b1 0.25 0.010
D 20 0.787
E 8.5 0.335
e 2.54 0.100
e3 17.78 0.700
F 7.1 0.280
i 5.1 0.201
L 3.3 0.130
Z 1.27 0.050
DIP16.TBL
TDA2540- TDA2541
7/7
