74HCT9046A Datasheet, PDF (24/40 Pages) NXP Semiconductors – PLL with bandgap controlled VCO

Philips Semiconductors
PLL with bandgap controlled VCO
Product specification
74HCT9046A
MGA937 - 1
f
f2
fc
f'c
f1
V
V
min
1/2V _CC
max
V _VCOIN
f′_c = -f-¹----⁺_2-----f--²-
linearity = ^f---′-^c---f-^–_c-----f-^c- × 100%
Fig.24 Definition of VCO frequency linearity:
∆V = 0.5 V over the V_CC range.
4
f _VCO
(%)
C1 = 1 µF
4.5 V
5.5 V
0 C1 =
39 pF
4.5 V
4
5.5 V
8
1
10
MBD114
10 ² _{R1 (kΩ)} 10 ³
R2 = ∞ and ∆V = 0.5 V.
Fig.25 Frequency linearity as a function of R1, C1
and V_CC.
1
PD
(W)
10 ¹
VCC =
5.5 V
C1 = 1 µF
4.5 V
C1 = 1 µF
5.5 V
C1 = 39 pF
4.5 V
C1 = 39 pF
10 ²
0
100
MBD121
200 _{R1 (kΩ)} 300
R2 = ∞.
Fig.26 Power dissipation as a function of
component values.
1999 Jan 11
1
PD
(W)
10 ¹
VCC =
5.5 V
C1 = 39 pF
4.5 V
C1 = 39 pF
MBD110
10 ²
0
5.5 V
4.5 V
C1 = 1 µF
100
200 _{R2 (kΩ)} 300
R1 = ∞.
Fig.27 Power dissipation as a function of
component values.
24