TDA9885_TDA9886_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 16 December 2008 26 of 56
NXP Semiconductors
TDA9885; TDA9886
I
2
C-bus controlled multistandard alignment-free IF-PLL demodulators
VIF AGC
[13]
t
resp(inc)
AGC response time to an
increasing VIF step
negative modulation; 20 dB
[14]
-4-ms
positive modulation; 20 dB
[14]
- 2.6 - ms
t
resp(dec)
AGC response time to a
decreasing VIF step
negative modulation; 20 dB
[14]
-3-ms
positive modulation; 20 dB
[14]
- 890 - ms
L standard; fast mode - 2.6 - ms/dB
L standard; normal mode
[14]
- 143 - ms/dB
∆V
i(VIF)
VIF amplitude step for activating
AGC fast mode
L standard −2 −6 −10 dB
V
VAGC
gain control voltage range see Figure 9 0.8 - 3.5 V
CR
stps
control steepness definition: ∆G
VIF
/ ∆V
VAGC
;
V
VAGC
=2Vto3V
- −80 - dB/V
V
th(VIF)
threshold voltage for high level
VIF input
see Table 6 and Table 7 120 200 320 µV
Pin VAGC
I
ch(max)
maximum charge current L standard - 100 - µA
I
ch(add)
additional charge current L standard: in the event of
missing VITS pulses and
no white video content
- 100 - nA
I
dch
discharge current L standard; normal mode - 35 - nA
L standard; fast mode - 1.8 - µA
Tuner AGC; pin TAGC; see
Figure 9 to Figure 11
V
i(VIF)(start1)(rms)
VIF input signal voltage for
minimum starting point of tuner
takeover at pins VIF1 and VIF2
(RMS value)
I
TAG C
= 120 µA;
R
TOP
=22kΩ or no R
TOP
and −15 dB via I
2
C-bus
(see
Table 12)
- 25mV
V
i(VIF)(start2)(rms)
VIF input signal voltage for
maximum starting point of tuner
takeover at pins VIF1 and VIF2
(RMS value)
I
TAG C
= 120 µA;R
TOP
=0Ω
or no R
TOP
and +15 dB via
I
2
C-bus (see Table 12)
45 90 - mV
QV
TOP
tuner takeover point accuracy I
TAG C
= 120 µA;
R
TOP
=10kΩ or no R
TOP
and 0 dB via I
2
C-bus
(see
Table 12)
7 1743mV
∆QV
TOP
/∆T takeover point variation with
temperature
I
TAG C
= 120 µA - 0.03 0.07 dB/K
V
o
permissible output voltage from external source - - 8.8 V
V
sat
saturation voltage I
TAG C
= 450 µA - - 0.5 V
I
sink
sink current no tuner gain reduction;
V
TAG C
= 8.8 V
- - 0.75 µA
maximum tuner gain
reduction; V
TAG C
=1V
450 600 750 µA
Table 20. Characteristics
…continued
V
P
=5V; T
amb
=25
°
C; see Table 22 for input frequencies; B/G standard is used for the specification (f
PC
= 38.9 MHz;
f
SC
= 33.4 MHz; PC / SC = 13 dB; f
mod
= 400 Hz); input level V
i(VIF)
= 10 mV (RMS) (sync level for B/G; peak white level
for L); IF input from 50
Ω
via broadband transformer 1 : 1; video modulation DSB; residual carrier for B/G is 10 % and for
L is 3 %; video signal in accordance with “ITU-T J.63 line 17 and line 330” or “NTC-7 Composite”; measurements taken in
test circuit of
Figure 26; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
