74HCT9046AN Philips, 74HCT9046AN Datasheet - Page 17

• Manufacturer Part Number: 74HCT9046AN
• Description: PLL with bandgap controlled VCO
• Manufacturer: Philips

Philips Semiconductors
1999 Jan 11
PLL with bandgap controlled VCO
I I
1/2 V
( A)
Fig.14 Typical input resistance curve at SIG
I I
Fig.16 Input current at SIG
5
0
5
CC
4.5 V
5.5 V
0.25
COMP
V
I
= 0.5 V at self-bias point.
IN
.
V I
1/2 V CC
V
self-bias operating point
CC
IN
=
; COMP
V (V)
5.5 V
I
4.5 V
1/2 V
IN
MGA957
V I
with
MBD108
CC
IN
,
0.25
17
___ R
- - - R
V OFF
(mV)
(k )
Fig.17 Offset voltage at demodulator output as a
1/2V
R I
Fig.15 Input resistance at SIG
800
600
400
200
s
s
60
40
20
20
40
= 300 k .
0
= 50 k .
0
CC
1/2 V
function of VCO
0.25
CC
V
I
5.5 V
= 0.5 V at self-bias point.
2
V
CC
=
4.5 V
1/2 V CC
1/2V CC
IN
and R
V
VCOIN
74HCT9046A
IN
V (V)
s
Product specification
I
.
; COMP
V
(V)
4.5 V
5.5 V
CC
1/2 V
MGA956 - 1
=
1/2V
MGA958
CC
IN
CC
with
2
0.25