TDA9885 Philips Semiconductors, TDA9885 Datasheet - Page 39

• Manufacturer Part Number: TDA9885
• Description: I2C-bus controlled single and multistandard alignment-free IF-PLL demodulators
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2003 Oct 02
handbook, full pagewidth
handbook, halfpage
I
alignment-free IF-PLL demodulators
V i(VIF)
(dB V)
(1) V
(2) I
(3) I
(4) I
Fig.8
2
C-bus controlled single and multistandard
110
100
90
80
70
60
TAGC
TAGC
TAGC
VAGC
0
Typical tuner takeover point as a function of
resistor R
is tuner current in TV mode with R
is tuner current in TV mode with R
is tuner current in TV mode with R
is VIF-AGC voltage and can only be measured at pin OP2 controlled by the I
4
TOP
8
.
V VAGC
12
(V)
4
3
2
1
30
16
Fig.7 Typical VIF and tuner AGC characteristic.
TOP
TOP
TOP
R TOP (k )
40
= 22 k or setting via I
= 10 k or setting via I
= 0 k or setting via I
20
MHB159
50
(1)
24
60
70
(2)
2
C-bus at +15 dB.
2
2
C-bus at 15 dB.
C-bus at 0 dB.
39
80
handbook, halfpage
(3)
V SAGC
(1) FM mode.
(2) AM mode.
90
(V)
5
4
3
2
1
2
100
30
C-bus (see Table 15).
V i(VIF) (dB V)
Fig.9 Typical SIF-AGC characteristic.
(4)
110
50
MHC116
120
(1)
(2)
600
500
400
300
200
100
70
I TAGC
0
TDA9885; TDA9886
( A)
90
V i(SIF) (dB V)
Product specification
110
MHC117
130