Datasheet

REV. B–16–
ADF4252
Table V. RF Control Register Map
P6 RF POWER-DOWN
0DISABLED
1ENABLED
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (1) C1 (0)P4P5P6N1P8 0CP1
CP2
N2T1T2T3N3
CONTROL
BITS
RF CP
CURRENT
SETTING
RF PD
POLARITY
C3 (0)
RESERVED
NOISE AND
SPUR
SETTING 1
RF POWER-
DOWN
RF CP
THREE-
STATE
RF
COUNTER
RESET
RESERVED
NOISE AND
SPUR
SETTING 2
NOISE AND
SPUR
SETTING 3
I
CP
(mA)
CP2 CP1 1.5k 2.7k 5.6k
001.125 0.625 0.301
013.375 1.875 0.904
105.625 3.125 1.506
117.7875 4.375 2.109
P8 RF PD POLARITY
0NEGATIVE
1POSITIVE
P5 RF CP THREE-STATE
0DISABLED
1THREE-STATE
P4 RF COUNTER
RESET
0DISABLED
1ENABLED
N3 N2 N1 NOISE AND SPUR
SETTING
000LOWEST SPUR
001LOW NOISE AND SPUR
111LOWEST NOISE
THESE BITS SHOULD
EACH BE SET TO 0 FOR
NORMAL OPERATION