TDA2540 [STMICROELECTRONICS]
IF AMPLIFIER WITH DEMODULATOR AND AFC; IF放大器，解调器和AFC
| 型号： | TDA2540 |
| 厂家： | 
ST |
| 描述： | IF AMPLIFIER WITH DEMODULATOR AND AFC |
| 文件： | 总7页 (文件大小：94K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TDA2540
TDA2541
IF AMPLIFIER WITH DEMODULATOR AND AFC
.
.
.
SUPPLY VOLTAGE : 12V TYP
SUPPLY CURRENT : 50mATYP
I.F. INPUT VOLTAGE SENSITIVITY AT
F = 38.9MHz : 85µVRMS 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 V = 10mV :
.
.
.
.
I
58dB TYP
A.F.C. OUTPUT VOLTAGE SWING FOR
∆f = 100kHz : 10V TYP
DESCRIPTION
The TDA2540 and 2541 are IF amplifier and A.M.
demodulatorcircuits for colour andblack and white
televisionreceiversusing PNPorNPNtuners. They
are intended for reception of negative or positive
modulation CCIR standard.
DIP16
(Plastic Package)
They incorporate the following functions :
ORDER CODE : TDA2540-TDA2541
.
Gain controlled amplifier
Synchronousdemodulator
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
IF INPUT
DECOUPLING CAPACITOR
TUNER AGC TAKE-OVER ADJUST
TUNER AGC OUTPUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IF INPUT
DECOUPLING CAPACITOR
AGC CAPACITOR
GROUND
AFC OUTPUT
VIDEO OUTPUT
AFC SWITCH
VCC
AFC DEMODULATOR L.C. NETWORK
AFC DEMODULATOR L.C. NETWORK
REFERENCE L.C. NETWORK
REFERENCE L.C. NETWORK
1/7
August 1992
TDA2540 - TDA2541
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
13.8
Unit
V
V (11–13) Supply Voltage
V (4–13)
Ptot
Tuner A.G.C. Voltage
Power Dissipation
12
V
900
mW
°C
°C
Tstg
Storage Temperature
– 55 to + 125
0 to + 70
Tamb
Operating Ambient Temperature
THERMAL DATA
Symbol
Parameter
Junction - ambient Thermal Resistance
Value
Unit
Rth (j-a)
70
°C/W
ELECTRICAL OPERATING CHARACTERISTICS
Tamb = 25oC ; V11–13 = 12V; f = 38.9MHz (unless otherwise specified)
Symbol
V11-13
I11
Parameter
Min.
Typ.
12
Max.
13.8
60
Unit
V
Supply Voltage Range
Supply Current
10.2
50
mA
µVRMS
mV
Vpp
kΩ
V1-16
IF Input Voltage Sensitivity
60
85
180
Max Input Voltage (Pins 1-16)
Video Output Voltage
140
2.7
2
V12-13
Z1-16
Differential Input Impedance (in parallel with 2pF)
Zero Signal Output Level
V12-13
V12-13
∆GV
5.7
2.9
52
6
6.3
3.2
V
Top Synchro Output Level
3.07
64
V
IF Voltage Gain Control Range
dB
2/7
TDA2540 - TDA2541
ELECTRICAL OPERATING CHARACTERISTICS (continued)
Tamb = 25 °C; V (11 – 13) = 12 V; f = 38.9 MHz (unless otherwise specified)
Symbol
S/N
Parameter
Signal to Noise Ratio (VI = 10mV) (see note 1)
Bandwidth of Video Amplifier (– 3dB)
Min.
Typ.
58
6
Max.
Unit
dB
50
B
MHz
%
dG
Differential Gain
4
10
10
30
30
dφ
Differential Phase
2
%
V12-13
V12-13
Carrier Signal at Video Output (VI = 10mV)
2nd Harmonic of Carrier at Video Output (VI = 10mV)
Intermodulation at 1.1MHz (blue) (see Figures 2 and 3)
Intermodulation at 1.1MHz (yellow) (see Figures 2 and 3)
Intermodulation at 3.3MHz (blue) (see Figures 2 and 3)
VCR Switches Off Output at : (VCR = low Level)
White Spot Inverter Threshold Level (see Figure 1)
White Spot Insertion Level (see Figure 1)
Noise Inverter Threshold Level (see Figure 1)
Noise Insertion Level (see Figure 1)
4
mVRMS
mVRMS
dB
20
60
50
54
46
46
46
dB
dB
V14-13
1.1
V
6.6
4.7
V
V
1.8
V
3.8
V
I4
V14-13
I4
Tuner AGC output Current Range
0 to 10
mA
V
Tuner AGC Output Voltage
0.3
15
Tuner AGC Output Leakage Current
TDA2541 V14-13 = 11V, V4-13 = 12V
TDA2540 V14-13 = 5V, V4-13 = 12V
µA
∆V5-13
∆f
AFC Output Voltage Swing (∆f = 100 kHz)
10
11
V
kHz
V
Change of Frequency at AFC Output (voltage swing of 10V)
AFC Switches OFF (AFC = low level) at :
100
200
2.5
V6-13
V6-13
V5-13
AFC Switches LOW (AFC = High level) at :
AFC Zero = Signal Output Voltage (minimum gain)
3.2
4
V
6
8
V
V
O (black to white)
S
N
Note : 1.
=
(dB)
VN (RMS at B = 5MHz)
Figure 1 : Video Output Waveform Showing White Spot and Noise Inverter Threshold Levels
3/7
TDA2540 - TDA2541
Figure 2 : Input Conditions for IntermodulationMeasurements
Figure 3 : Test Set-up for Intermodulation
4/7
TDA2540 - TDA2541
Figure 4 : AFC Voltage versus Frequency V5-13
Figure 5 : AFC Voltage versus Frequency V5-13
Figure 6 : Signal/Noise Ratio versus Input
Voltage V1-16
Figure 7 : AGC Tuner Current Curve
TDA2540
TDA2541
5/7
TDA2540 - TDA2541
Figure 7 : AGC Tuner Current Curve (continued)
TDA2540 - TDA2541
APPLICATION CIRCUIT
6/7
TDA2540 - TDA2541
PACKAGE MECHANICAL DATA
16 PINS – PLASTIC DIP
b1
b
B
e
E
Z
e3
D
9
8
16
1
Millimeters
Typ.
Inches
Typ.
Dimensions
Min.
Max.
Min.
0.020
0.030
Max.
a1
B
b
0.51
0.77
1.65
0.065
0.5
0.020
0.010
b1
D
E
e
0.25
20
0.787
8.5
2.54
0.335
0.100
0.700
e3
F
17.78
7.1
5.1
0.280
0.201
i
L
3.3
0.130
Z
1.27
0.050
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights 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 in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
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 conforms to
the I2C Standard Specifications as defined by Philips.
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