TDA9887 Philips Semiconductors, TDA9887 Datasheet - Page 40

• Manufacturer Part Number: TDA9887
• Description: I2C-bus controlled multistandard alignment-free IF-PLL demodulator with FM radio
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2004 Aug 25
I
IF-PLL demodulator with FM radio
(dB V)
(1) V
(2) I
(3) I
(4) I
V
Fig.8
2
i(VIF)
C-bus controlled multistandard alignment-free
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
.
12
V
16
VAGC
(V)
Fig.7 Typical VIF and tuner AGC characteristic.
TOP
TOP
TOP
4
3
2
1
30
= 22 k or setting via I
= 10 k or setting via I
= 0 k or setting via I
20
R
TOP
mhb159
40
(k )
24
50
(1)
60
70
2
(2)
C-bus at +15 dB.
2
2
C-bus at 15 dB.
C-bus at 0 dB.
40
80
handbook, halfpage
(3)
V FMAGC
90
(V)
100 110
V
i(VIF)
(4)
4
3
2
1
2
40
C-bus (see Table 15).
Fig.9 Typical FM-AGC characteristic.
(dB V)
mhc116
120
600
500
400
300
200
100
0
60
I
( A)
TAGC
80
V i(FMIN) (dB V)
Product specification
100
TDA9887
MHC148
120