Datasheet

REV. B–6–
ADF4252
ADF4252
2
DOUBLER
OUTPUT
MUX
V
DD
D
GND
V
DD
N
DIV
R
DIV
HIGH Z
4-BIT R
COUNTER
PHASE
FREQUENCY
DETECTOR
LOCK
DETECT
CHARGE
PUMP
REFERENCE
REF
IN
REF
OUT
V
DD
1 V
DD
2 V
DD
3 DV
DD
V
P
1 V
P
2
R
SET
24-BIT
DATA
REGISTER
CLK
DATA
LE
FRACTION
REG
MODULUS
REG
INTEGER
REG
N
COUNTER
THIRD ORDER
FRACTIONAL
INTERPOLATOR
RF
IN
A
RF
IN
B
CP
RF
6-BIT IF A
COUNTER
CP
IF
2
DOUBLER
15-BIT R
COUNTER
CHARGE
PUMP
PHASE
FREQUENCY
DETECTOR
12-BIT IF B
COUNTER
IF PRE-
SCALER
MUXOUT
A
GND
1 A
GND
2 D
GND
CP
GND
1 CP
GND
2
IF
IN
B
IF
IN
A
Figure 2. Detailed Functional Block Diagram