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TDA4455 датащи(PDF) 5 Page - TEMIC Semiconductors

номер детали TDA4455
подробное описание детали  Multistandard VIF Amplifier and PLL Demodulator
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производитель  TEMIC [TEMIC Semiconductors]
домашняя страница  http://www.temic.de
Logo TEMIC - TEMIC Semiconductors

TDA4455 датащи(HTML) 5 Page - TEMIC Semiconductors

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TELEFUNKEN Semiconductors
TDA4455
Preliminary Information
Rev. A1: 08.05.1995
5 (12)
Unit
Max.
Typ.
Min.
Symbol
Test Conditions / Pins
Parameters
IF residual voltage
f = 38.9 MHz
f = 77.8 MHz
Vres1
Vres2
2
5
mV
mV
Upsetting factor of sync
pulse in the AGC range
DVsync
Vsync
3
%
Tilt of half picture
between black and white
Standard L
5
10
%
Ultra black limiting
threshold
Below sync level
DVlim1
250
mV
Ultra white limiting
threshold
Above ultra white level
DVlim2
500
mV
Standard switch
Pin 11
Control voltage B/G
Note 6
Vsw1
2.5
4.0
V
Control voltage L
Vsw2
0
1.5
V
Control voltage D2MAC
Vsw3
5.0
Vs
V
Input selector switch
Pin 16
Control voltage – input 1
active
Note 7
5.0
VS
V
Control voltage – input 2
active
0
2.5
V
Notes
1.
A peak white value for at least 10
µs must be trans-
mitted for each complete frame
2.
Loop filter: R1 = 500
W – 1 k, C1 = 0.47 mF
Capacitor VCO circuit: CVCO = 27 – 47 pF
3.
Pin 7 unloaded
4.
Residual carrier: 10% carrier amplitude
5.
Blanking level: 30% carrier amplitude
6.
Without control voltage at Pin 11 – standard B/G is
automatically selected
7.
Without control voltage at Pin 16 – input 1 is auto-
matically active
Alignment of the VCO
1.
Apply 4.5 V to Pin 6, to disable the broadband
amplifier.
2.
Measure the dc-voltage at Pin 12 (phase detector).
3.
Apply a 38.9 MHz unmodulated carrier signal to the
IF input (Pins 1–2 or Pins 17–18); adjust the input
level so that the AGC voltage at Pin 6 is between
2.0 V and 2.5 V.
4.
Adjust the VCO circuit until at Pin 12 is the same DC-
voltage as measured in step 2.


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