Data Sheet

ADRF6806

Rev. B | Page 7 of 36

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

1

2

3

30

29

28

4

5

6

7

8

22

23

24

25

26

27

9

10

21

RFIN

GND

RSET

VCC1

CPOUT

VCC2

REFIN

DECL2

VCC1

THIRD-ORDER

SDM

VCO

BAND

CURRENT

CAL/SET

VCO

2800MHz

TO

2H400MHz

PHASE DETECTOR

AND

CHARGE PUMP

QUADRATURE

÷2

SERIAL

PORT

×2

ENABLE

PROGRAMABLE

DIVIDER

÷4

PRESCALER

÷2

VCO

LDO

2.5V

LDO

MUX

INTEGER

FRACTION

6

6

BLEED

SCALE

VOCM

DECL3

GND

VCCBB

VCCRF

GND

GND

RFIP

GND

DIV

÷2

TO

÷40

DIV

÷4, ÷6, ÷8

MODULUS

BUFFER

CTRL

DIV

CTRL

GND

COMMON-

MODE

LEVEL

CONTROL

MUXOUT

NOTES

1. THE EXPOSED PADDLE SHOULD BE SOLDERED TO A LOW IMPEDANCE GROUND PLANE.

÷2

DIV

CTRL

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 2

VCC1

The 3.3 V power supply for VCO and PLL.

3

CPOUT

Charge Pump Output Pin. Connect this pin to VTUNE through the loop filter.

4, 7, 11, 15, 16, 20,

21, 24, 27, 30, 31, 35

GND

Connect these pins to a low impedance ground plane.

5

RSET

Charge Pump Current. The nominal charge pump current can be set to 250 μA, 500 μA, 750 μA, or 1 mA

using DB10 and DB11 of Register 4 and by setting DB18 to 0 (internal reference current). In this mode, no

externally tweaked according to the following equation where the resulting value is in units of ohms.

8

.

37

4

.

217

−

⎥

⎦

⎤

⎢

⎣

⎡

×

=

NOMINAL

CP

SET

I

I

R

6

REFIN

Reference Input. Nominal input level is 1 V p-p. Input range is 9 MHz to 160 MHz.