TDA4472-M Datasheet, PDF (8/14 Pages) TEMIC Semiconductors – Video-IF and Quasi Parallel Sound Processing

TDA4472-M
Parameters
Test Conditions / Pins Symbol Min. Typ. Max. Unit
Control voltage: – input 1 active See note 9
– input 2 active
V_SW
2.0
0
V_S
V
0.8
V
Switching current
I_SW
±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.)
w w ^{Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 – 10 pF,}
Coil L_VCO with unloaded Q-factor Q_o 60 for an oscillator voltage 100 mV_RMS 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.}
SIF 2
Loop
comp.
Intercarrier
(FM/NICAM)
AFC
+V_S
AFC
switch
Loop
filter
10 k W
NC
8.2 pF
L_VCO
150 W
C_VCO
470 nF
C_Ref
2.2 mF
NC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
10 mF
2.2 mF
10 k W
NC NC
SIF 1
SIF
Input switch
AGC (SIF)
AGC (VIF)
VIF
*) external L/C circuit (VCO 38.9 MHz)
with TOKO coil 7KM, 292XNS – 4051Z
Tuner
delay Tuner Video
AGC
Figure 3. Test circuit
8 (14)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A2, 15-Oct-96