74HCT9046A Datasheet, PDF (17/40 Pages) NXP Semiconductors – PLL with bandgap controlled VCO

Philips Semiconductors
PLL with bandgap controlled VCO
Product specification
74HCT9046A
II
∆ VI
MBD108
self-bias operating point
VI
Fig.14 Typical input resistance curve at SIG_IN,
COMP_IN.
800
RI
(k Ω)
600
400
200
0
1/2VCC 0.25
MGA956 - 1
VCC =
4.5 V
5.5 V
1/2V _CC
1/2VCC 0.25
VI (V)
Fig.15 Input resistance at SIG_IN; COMP_IN with
∆V_I = 0.5 V at self-bias point.
5
II
( µA)
0
4.5 V
5.5 V
VCC = 5.5 V
MGA957
4.5 V
60
V _OFF
(mV)
40
20
0
20
VCC = 4.5 V
5.5 V
MGA958
5
1/2 VCC 0.25
1/2 VCC
1/2 VCC 0.25
VI (V)
Fig.16 Input current at SIG_IN; COMP_IN with
∆V_I = 0.5 V at self-bias point.
40
1/2 VCC 2
1/2 VCC
1/2 VCC 2
V _VCOIN (V)
___ R_s = 50 kΩ.
- - - R_s = 300 kΩ.
Fig.17 Offset voltage at demodulator output as a
function of VCO_IN and R_s.
1999 Jan 11
17