Datasheet

ADF4106 Data Sheet
Rev. E | Page 14 of 24
Table 8. N (A, B) Counter Latch Map
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)A1A2A3A4A5B1B2B3B4B5B6B7B8B9B10B11B12B13 A6
DB21
DB22DB23
G1
0 0
0
1
1
0
F4 (FUNCTION LATCH)
FASTLOCK ENABLE
1 1
A6 A5 .......... A2 A1
0 0 .......... 0 0 0
0 0 .......... 0 1 1
0 0 .......... 1 0 2
0 0 .......... 1 1 3
. . .......... . . .
. . .......... . . .
. . .......... . . .
1 1 .......... 0 0 60
1 1 .......... 0 1 61
1 1 .......... 1 0 62
1 1 .......... 1 1 63
X X
B13 B12 B11 B3 B2 B1
0 0 0 .......... 0 0 0
0 0 0 .......... 0 0 1
0 0 0 .......... 0 1 0
0 0 0 .......... 0 1 1
3
. . . .......... . . .
.
. . . .......... . . .
.
. . . .......... . . .
.
1 1 1 .......... 1 0 0
8188
1 1 1 .......... 1 0 1
8189
1 1 1 .......... 1 1 0
8190
1 1 1 .......... 1 1 1
8191
X = DON’T CARE
RESERVED
13-BIT B COUNTER
6-BIT A COUNTER
CONTROL
BITS
CP GAIN
A COUNTER
DIVIDE RATIO
B COUNTER DIVIDE RATIO
NOT ALLOWED
NOT ALLOWED
NOT ALLOWED
THESE BITS ARE NOT USED
BY THE DEVICE AND ARE
DON'T CARE BITS.
OPERATIONCP GAIN
CHARGE PUMP CURRENT
SETTING 1 IS PERMANENTLY USED.
CHARGE PUMP CURRENT
SETTING 2 IS PERMANENTLY USED.
CHARGE PUMP CURRENT
SETTING 1 IS USED.
CHARGE 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.
N = BP + A, P IS PRESCALER VALUE SET IN THE FUNCTION
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).
02720-024