ADRF6755ACPZ-R7 datasheet(33/48 Pages) AD

33 / 48 page

Data Sheet

ADRF6755

Rev. B | Page 33 of 48

Table 16. Register CR9 (Address 0x09), Charge Pump

Current Setting

Bit

Description

[7:4]

Charge pump current1

0000 = 0.3125 mA (default)

0001 = 0.63 mA

0010 = 0.94 mA

0011 = 1.25 mA

0100 = 1.57 mA

0101 = 1.88 mA

0110 = 2.19 mA

0111 = 2.50 mA

1000 = 2.81 mA

1001 = 3.13 mA

1010 = 3.44 mA

1011 = 3.75 mA

1100 = 4.06 mA

1101 = 4.38 mA

1110 = 4.69 mA

1111 = 5.00 mA

Set to 0

Double-buffered. Loaded on a write to Register CR0.

Table 17. Register CR10 (Address 0x0A), Reference

Frequency Control

Bit

Description

Set to 01

R/2 divider setting1

0 = bypass R/2 divider (default)

1 = select R/2 divider

Reference frequency doubler (R-doubler) enable1

0 = disable doubler (default)

1 = enable doubler

[4:0]

5-bit R-divider setting1

00000 = divide by 32 (default)

00001 = divide by 1

00010 = divide by 2

…

11110 = divide by 30

11111 = divide by 31

Double-buffered. Loaded on a write to Register CR0.

Table 18. Register CR12 (Address 0x0C), PLL Power-Up

Bit

Description

Set to 0

Set to 1

Power down PLL

0 = power up PLL (default)

1 = power down PLL

Set to 0

Table 19. Register CR13 (Address 0x0D), Lock Detector Control 2

Bit

Description

Set to 1

LDCount1 (see Table 7)

Set to 1

Set to 0

Set to 1

Set to 0

Table 20. Register CR14 (Address 0x0E), TXDIS Control

Bit

Description

TXDIS_LOCLK

0 = LO clock always running

1 = stop LO clock when TXDIS = 1

Set to 0

Table 21. Register CR23 (Address 0x17), Lock Detector Control 1

Bit

Description

Set to 0

Set to 1

Lock detector enable

0 = lock detector disabled (default)

1 = lock detector enabled

Lock detector up/down count, LDCount0 (see Table 7)

Lock detector precision

0 = low, coarse (10 ns)

1 = high, fine (6 ns)

Set to 0

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