Datasheet

ADF4360-2 Data Sheet
Rev. C | Page 14 of 24
Table 8. N Counter Latch
DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB1
2 DB11 DB10 DB9 DB8 DB7 DB6
DB5 DB4 DB3 DB2 DB1 DB0
C2 (1) C1 (0)
A1A2A3A4A5B1B2B3B4B5B6B7B8B9B10B11B12B13 RSV
CONTROL
BITS
5-BIT A COUNTER
13-BIT B COUNTER
DB21DB22DB23
CP GAIN
DIVIDE-BY-
2 SELECT
DIVIDE-
BY-2
RESERVED
CPGDIV2
DIVSEL
THIS BIT IS NOT USED
BY THE DEVICE AND
IS A DON'T CARE BIT.
A5 A4 .......... A2 A1
A COUNTER
DIVIDE RATIO
00.......... 0 0 0
00.......... 0 1 1
00.......... 1 0 2
00.......... 1 1 3
............ . . .
............ . . .
............ . . .
1 1 .......... 0 0 28
1 1 .......... 0 1 29
1 1 .......... 1 0 30
1 1 .......... 1 1 31
F4 (FUNCTION LATCH)
FASTLOCK ENABLE
CP GAIN OPERATION
CHARGE PUMP CURRENT SETTING 1
IS PERMANENTLY USED
00
CHARGE PUMP CURRENT SETTING 2
IS PERMANENTLY USED
10
N = BP + A; P IS PRESCALER VALUE SET IN THE CONTROL LATCH.
B MUST BE GREATER THAN OR EQUAL TO A. FOR CONTINUOUSLY
ADJACENT VALUES OF (N × F
REF
), AT THE OUTPUT, N
MIN
IS (P
2
–P).
B13 B12 B11 B3 B2 B1 B COUNTER DIVIDE RATIO
.......... 00 0 0
0 0 0
0 0 0
0 0 0
0 0 NOT ALLOWED
.......... 0 0 1 NOT ALLOWED
.......... 0 1 0 NOT ALLOWED
.......... 1 1 1 3
.......... .. . .
. . .
. . .
. . .
.......... . . . .
.......... . . . .
.......... 11 1 1
1 1 1
1 1 1
1 1 1
0 0 8188
.......... 1 0 1 8189
.......... 1 1 0 8190
.......... 1 1 1 8191
04436-018
DIV2
0
1
DIVIDE-BY-2
FUNDAMENTAL OUTPUT
DIVIDE-BY-2
DIVSEL
0
1
DIVIDE-BY-2 SELECT (PRESCALER INPUT)
FUNDAMENTAL OUTPUT SELECTED
DIVIDE-BY-2 SELECTED