Data Sheet

ADF4155

Figure 28. Register 4 (R4)

RD1

REFERENCE DIVIDE BY 2

0

DISABLED

1

ENABLED

CP4

CP3

CP2

CP1

ICP (mA)

4.7kΩ

0

0

0

0

0.31

0

0

0

1

0.63

0

0

1

0

0.94

0

0

1

1

1.25

0

1

0

0

1.56

0

1

0

1

1.88

0

1

1

0

2.19

0

1

1

1

2.50

1

0

0

0

2.81

1

0

0

1

3.13

1

0

1

0

3.44

1

0

1

1

3.75

1

1

0

0

4.06

1

1

0

1

4.38

1

1

1

0

4.69

1

1

1

1

5.00

R10

R9

..........

..........

..........

..........

..........

..........

..........

..........

..........

..........

R2

R1

R DIVIDER (R)

0

0

0

1

1

0

0

1

0

2

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

1

1

0

0

1020

1

1

0

1

1021

1

1

1

0

1022

1

1

1

1

1023

U4

0

NEGATIVE

1

POSITIVE

U3

POWER-DOWN

0

DISABLED

1

ENABLED

M3

M2

M1

OUTPUT

0

0

0

THREE-STATE OUTPUT

0

0

1

0

1

0

0

1

1

R

1

0

0

N COUNTER OUTPUT

COUNTER OUTPUT

1

0

1

ANALOG LOCK DETECT

1

1

0

DIGITAL LOCK DETECT

1

1

1

RESERVED

L2

DITHER 2

0

OFF

1

ON

10-BIT R COUNTER

MUXOUT

DB31 DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8

DB7

DB6 DB5

DB4

DB3

DB2

DB1

DB0

M2

M1

RD2

RD1

R10

CONTROL BITS

R9

R8

R7

R6

R5

R4

R3

R2

R1

D1

CP4

CP3

CP2

CP1

LVS

U4

U3

U2

U1

C3(1) C2(0) C1(0)

C4(0)

M3

L2

0

U1

COUNTER

RESET

0

DISABLED

1

ENABLED

RD2

REFERENCE

DOUBLER

0

DISABLED

1

ENABLED

D1

DOUBLE BUFFER

R6, DB23 TO DB21

0

DISABLED

1

ENABLED

U2

CHARGE PUMP

THREE-STATE

0

DISABLED

1

ENABLED

0

LVS

MUXOUT

LOGIC LEVEL

0

1.8 V

1

CHARGE PUMP

CURRENT

SETTING

Rev. 0 | Page 21 of 32