Datasheet

Data Sheet ADF4107
Rev. D | Page 13 of 20
AB COUNTER LATCH MAP
DB20
DB19
DB18
DB17
DB16 DB15 DB14
DB13
DB12
DB1
1
DB10 DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2 DB1
DB0
C2 (0)
C1 (1)
A1A2A3A4A5B1B2B3
B4B5
B6
B7B8
B9
B10B
11B12B13 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 B1
1 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 RA
TIO
B COUNTER DIVIDE R
ATIO
NOT
ALLOWED
NOT ALLOWED
NOT
ALLOWED
THESE BITS ARE NOT USED
B
Y THE DEVICE AND ARE
DON'T CARE BITS.
OPER
ATIONCP
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 F
ASTLOCK
MODE IS USED. SEE FUNCTION
L
ATCH DESCRIPTION.
N = BP + A, P IS PRESCALER VALUE SET IN THE FUNCTION
LATCH. B MUST BE GRE
ATER THAN OR EQUAL TO A. FOR
CONTINUOUSLY ADJACENT VALUES OF (N × F
REF
), AT THE
OUTPUT, N
MIN
IS (P
2
– P).
03338-024
Figure 24. AB Counter Latch Map