R2 REGISTER

The R2 Register address bits (R2 [1:0]) are “10”.

The IF_CUR [1:0] bits program the IF charge pump current. Considering the external IF VCO and loop filter, the user can select

the amount of IF charge pump current to be 100µA, 200µA, 300µA or 800µA.

R2 REGISTER

MSB

SHIFT REGISTER BIT LOCATION

LSB

23

22

21

20

19

18

17

16

15

14

13

12

11

10

987654321

0

Data Field

Address

Field

R2

(Default)

IF_

CUR[1:0]

00100111011

01

0

1

00010

10

Name

Functions

IF_CUR [1:0]

IF Charge Pump Current

00 = 100 µA

01 = 200 µA

10 = 300 µA

11 = 800 µA

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