TDA9885_TDA9886_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 16 December 2008 38 of 56
NXP Semiconductors
TDA9885; TDA9886
I
2
C-bus controlled multistandard alignment-free IF-PLL demodulators
Pin numbers for TDA9885HN and TDA9886HN in parentheses.
Fig 12. Typical analog AFC characteristic
mhc113
0
5
4
3
2
1
36 37 38 40 41
38.9
38.71 39.09
lock range without SAW filter
f (MHz)
AFC window
V
AFC
(V)
+200
+100
0
−100
I
AFC
(µA)
−200
TDA9885
TDA9886
21
(23)
R1
22 kΩ
R2
22 kΩ
V
P
V
AFC
I
AFC
SC is sound carrier, with respect to sync level.
CC is chrominance carrier, with respect to sync level.
PC is picture carrier, with respect to sync level.
The sound carrier level takes into account a sound shelf
attenuation of 14 dB (SAW filter G1984M).
Fig 13. Typical signal-to-noise ratio as a function of
VIF input voltage
Fig 14. Input signal conditions
0
30 50 110
80
60
20
40
mhc112
70 90
V
i(VIF)
(dBµV)
S/N
(dB)
SC CC PC SC CC PC
BLUE YELLOW
21 dB
13.2 dB
3.2 dB
21 dB
13.2 dB
10 dB
mha739
