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TDA5940-2 데이터시트(PDF) 7 Page - Siemens Semiconductor Group

부품명 TDA5940-2
상세설명  Video and Sound IF with V & S SCART
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제조업체  SIEMENS [Siemens Semiconductor Group]
홈페이지  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

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Semiconductor Group
50
TDA 5940-2
Characteristics (cont’d)
Alignment Instructions
At a video carrier input level of
V1/2 = 4 mVrms, fPC = 38.9 MHz, and a superimposed AGC voltage
of
V22 = 1.5 V, the demodulator tank circuit is preliminarily aligned until a max. video signal V11pp is
obtained at the video output. Any suitable video test signal can be used for modulation. The AGC
voltage
V22 is reduced until the signal is approx. 1 Vpp and the max. video signal is obtained when
fine-aligning the demodulator tank circuit. The alignment is not critical due to relatively large
bandwidth of the demodulator tank circuit. Fine-tuning to intercarrier
S/N, differential phase or
2T-pulse characteristics is possible.
Parameter
Symbol
Limit Values
Unit
Test Condition
min.
typ.
max.
Sound IF Section
Min. sound IF-input voltage
(min. control)
V9
70
µV
AF-output voltage
V6
500
mV
f = 30 kHz
fmod = 1 kHz
FSIF = 5.5 MHz
SCART AF-output voltage
V5
500
mV
f = 30 kHz
fmod = 1 kHz
FSIF = 5.5 MHz
Total harmonic distortion
THDAFo
0.5
%
f = 30 kHz
fmod = 1 kHz
FSIF = 5.5 MHz
Max. SCART-input voltage
V7RMS
2V
Gain SCART-sound switch
G7-6
1
V8 ≥ 3.6 V


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