ICS1522 Ver la hoja de datos (PDF) - Integrated Circuit Systems
Número de pieza
componentes Descripción
Lista de partido
ICS1522
Integrated Circuit Systems
ICS1522 Datasheet PDF : 13 Pages
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ICS1522
REG#
4
4
4
4
4
4
5
5
5
5
BIT(S)
3-5
6
7
8
9
10
0
1
2
3
BIT REF.
PFD (0;2)
DESCRIPTION
Phase Frequency Detector Gain
PFD(2)
0
0
0
0
1
1
1
1
PFD(1)
0
0
1
1
0
0
1
1
PFD(0)
0
1
0
1
0
1
0
1
PFD GAIN
.2344uA/2Πrad
.9375uA/2Πrad
3.750uA/2Πrad
15.00uA/2Πrad
1.875uA/2Πrad
7.500uA/2Πrad
30.00uA/2Πrad
120.0uA/2Πrad
FINE PHASE
ADJ.
3ns/V
3ns/V
3ns/V
3ns/V
6ns/V
6ns/V
1.5ns/V
.375ns/V
PDEN
INT_FLT
INT_VCO
CLK_SEL
RESERVED
FBK_SEL
FBK_POL
ADD
SWLW
Phase Frequency Detector Enable
(Default=1) 0=PFD Disable; 1=PFD Enable
Loop Filter Select (Default=1)
0=External Loop Filter (IPUMP & VVCO active)
1=Internal Loop Filter
VCO Select (Default=1)
0=External VCO (EXTVCO active)
1=Internal VCO
Feedback Divider Clock Input Select (Default=0)
0=VCO; 1=OUT1
Must be set to one.
Feedback Select (Default=1)
0=External Feedback (EXTFBK active)
1=Internal Feedback An active external feedback signal at EXTFBK
is necessary to synchronously switch to internal.
External Feedback Polarity (Default=0)
0=Positive Edge; 1=Negative Edge
Addition of 1 VCO Cycle (Default=0)
Toggle (0 to 1 to 0) to add 1 VCO cycle.
Removal of 1 VCO Cycle (Default=0)
Toggle (0 to 1 to 0) to remove 1 VCO cycle.
6
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