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TDA4472-M Fiches technique(PDF) 8 Page - TEMIC Semiconductors

No de pièce TDA4472-M
Description  Video-IF and Quasi Parallel Sound Processing
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Fabricant  TEMIC [TEMIC Semiconductors]
Site Internet  http://www.temic.de
Logo TEMIC - TEMIC Semiconductors

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TDA4472-M
TELEFUNKEN Semiconductors
Rev. A2, 15-Oct-96
Preliminary Information
8 (14)
Unit
Max.
Typ.
Min.
Symbol
Test Conditions / Pins
Parameters
Control voltage: – input 1 active
– input 2 active
See note 9
VSW
2.0
0
VS
0.8
V
V
Switching current
ISW
±100
mA
Notes
1.)
This parameter is given as an application information and not tested during production.
2.)
In VCR mode the VIF- and SIF path is switched off.
3.)
Adjustment of turn over point (delayed tuner AGC) with external resistor Rtop or external voltage Vtop possible.
4.)
Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 – 10 pF,
Coil LVCO with unloaded Q-factor Qo
w 60 for an oscillator voltage w 100 mVRMS at Pin 20 – 21
(e.g. TOKO coil 7 KM, 292 XNS - 4051Z)
5.)
The oscillator drift is related to the picture carrier frequency, at external temperature-compensated LC circuit.
6.)
a (1.07) = 20 log (4.43 MHz component/1.07 MHz component); a (1.07) value related to black-white signal
input signal conditions:
picture carrier = 0 dB, colour carrier = –6 dB, sound carrier = –24 dB
7.)
Without control voltage at Pin 19 “AFC on” is automatically selected.
8.)
Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to sync. peak level).
9.)
Without control voltage at Pin 3 the SIF input 1 is automatically selected.
28
27
26
25
24
23
22
21
20
19
18
17
16
15
12
35
4
6
789
10
11
12
13
14
8.2 pF
LVCO
CVCO
Loop
filter
150
W
470 nF
AFC
switch
AFC
+VS
Intercarrier
(FM/NICAM)
10 k
W
Loop
comp.
SIF 2
CRef
2.2
mF
10 k
W
Tuner
delay
Tuner
AGC
Video
AGC (VIF)
VIF
AGC (SIF)
SIF
Input switch
SIF 1
NC
NC
10
mF
2.2
mF
NC
NC
*)
external L/C circuit (VCO 38.9 MHz)
with TOKO coil 7KM, 292XNS – 4051Z
Figure 3. Test circuit


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