Datasheet

REV. B–20–
ADF4252
Table IX. IF Control Register Map
P19 IF POWER-DOWN
0DISABLED
1ENABLED
P20 IF LDP
03
15
IF CP3 IF CP2 IF CP1 1.5k 2.7k 5.6k
000 1.125 0.625 0.301
001 2.25 1.25 0.602
010 3.375 1.875 0.904
011 4.5 2.5 1.205
100 5.625 3.125 1.506
101 6.75 3.75 1.808
110 7.7875 4.375 2.109
11195.0 2.411
P21 IF PD POLARITY
0NEGATIVE
1POSITIVE
P18 IF CP THREE-STATE
0DISABLED
1THREE-STATE
P17 IF COUNTER RESET
0DISABLED
1ENABLED
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (1) C1 (0)P17P18P19P20P21CP1CP2
CP3
PR1T7T8PR2PR3
CONTROL
BITS
IF CP CURRENT
SETTING
IF PD
POLARITY
C3 (1)
RESERVED
IF LDP
IF POWER-
DOWN
IF CP
THREE-
STATE
IF
COUNTER
RESET
RF PHASE
RESYNC
RF PHASE
RESYNC
THESE BITS
SHOULD BE SET
TO 0 FOR NORMAL
OPERATION
PR3 PR2 PR1 RF PHASE RESYNC
000DISABLED
111ENABLED
I
CP
(mA)