Datasheet

REV. B–18–
ADF4252
Table VII. IF N Divider Register Map
B12 B11 B10 B3 B2 B1 B COUNTER DIVIDE RATIO
000.......... 0113
000.......... 1004
............. ....
............. ....
............. ....
111.......... 1004092
111.......... 1014093
111.......... 1104094
111.......... 1114095
A COUNTER
A6 A5 .......... A2 A1 DIVIDE RATIO
00.......... 0 0 0
00.......... 0 1 1
00.......... 1 0 2
00.......... 1 1 3
............ . . .
............ . . .
............ . . .
11.......... 0 0 60
11.......... 0 1 61
11.......... 1 0 62
11.......... 1 1 63
*N = BP + A, P IS PRESCALER VALUE. B MUST BE GREATER THAN OR EQUAL TO A FOR CONTIGUOUS VALUES OF N, N
MIN
IS (P
2
– P) .
P14 P13 PRESCALER VALUE
00 8/9
01 16/17
10 32/33
11 64/65
P15 IF CP GAIN
0DISABLED
1ENABLED
DB20
DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11
DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
C2 (0) C1 (0)
A1A2A3A4A5B1B2B3B4B5B6B7B8B9B10B11B12P13 A6
CONTROL
BITS
6-BIT IF A COUNTER*12-BIT IF B COUNTER*
DB21
IF
PRESCALER*
DB22DB23
IF CP
GAIN
P14
P15
C3 (1)