Datasheet

REV.
ADF4001
–9–
Table IV. N Counter Latch Map
THESE BITS ARE NOT USED
BY THE DEVICE AND ARE
DON’T CARE BITS.
F4 (FUNCTION LATCH)
FASTLOCK ENABLE CP GAIN OPERATION
0 0CHARGE PUMP CURRENT SETTING
1 IS PERMANENTLY USED
0 1CHARGE PUMP CURRENT SETTING
2 IS PERMANENTLY USED
1 0CHARGE PUMP CURRENT SETTING
1 IS USED
1 1CHARGE PUMP CURRENT IS
SWITCHED TO SETTING 2. THE
TIME SPENT IN SETTING 2 IS
DEPENDENT ON WHICH FASTLOCK
MODE IS USED. SEE FUNCTION
LATCH DESCRIPTION.
N13 N12 N11 N3 N2 N1 N COUNTER DIVIDE RATIO
000.......... 0011
000.......... 0102
000.......... 0113
000.......... 1004
............. ....
............. ....
............. ....
111.......... 1008188
111.......... 1018189
111.......... 1108190
111.......... 1118191
DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (0) C1 (1)
N1N2N3N4N5N6N7N8N9N10N11N12N13
CONTROL
BITS
RESERVED
13-BIT N COUNTER
DB21
RESERVED
DB22DB23
CP GAIN
G1
X = DON’T CARE
X
X X
XXX X
X
B