ADF4108BRUZ AD [Analog Devices], ADF4108BRUZ Datasheet - Page 13

• Manufacturer Part Number: ADF4108BRUZ
• Description: PLL Frequency Synthesizer
• Manufacturer: AD [Analog Devices]

AB COUNTER LATCH MAP
DB23
THESE BITS ARE NOT USED
BY THE DEVICE AND ARE
DON'T CARE BITS.
RESERVED
X
DB22
X
F4 (FUNCTION LATCH)
FASTLOCK ENABLE
0
0
1
1
DB21
G1
X = DON’T CARE
DB20
B13
B13
0
0
0
0
.
.
.
1
1
1
1
DB19
B12
B12
0
0
0
0
.
.
.
1
1
1
1
DB18
B11
G1
CP GAIN
0
1
0
1
B11
0
0
0
0
.
.
.
1
1
1
1
DB17
B10
OPERATION
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.
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
DB16
B9
DB15
13-BIT B COUNTER
B8
B3
0
0
0
0
.
.
.
1
1
1
1
DB14
B7
Figure 18. AB Counter Latch Map
B2
0
0
1
1
.
.
.
0
0
1
1
DB13
B6
Rev. 0 | Page 13 of 20
B1
0
1
0
1
.
.
.
0
1
0
1
DB12
B5
DB11
B4
B COUNTER DIVIDE RATIO
NOT ALLOWED
NOT ALLOWED
NOT ALLOWED
3
.
.
.
8188
8189
8190
8191
DB10
B3
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
OUTPUT, N
DB9
B2
A6
0
0
0
0
.
.
.
1
1
1
1
DB8
B1
MIN
IS (P
A5
0
0
0
0
.
.
.
1
1
1
1
DB7
A6
2
– P).
DB6
A5
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
6-BIT A COUNTER
DB5
A4
A2
0
0
1
1
.
.
.
0
0
1
1
DB4
A3
REF
DB3
A2
A1
0
1
0
1
.
.
.
0
1
0
1
), AT THE
DB2
A1
A COUNTER
DIVIDE RATIO
0
1
2
3
.
.
.
60
61
62
63
ADF4108
C2 (0) C1 (1)
DB1
CONTROL
BITS
DB0