ADRF6655ACPZ-R7 datasheet(7/44 Pages) AD

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ADRF6655

Rev. 0 | Page 7 of 44

PIN CONFIGURATION AND FUNCTION DESPCRIPTIONS

VCO

LDO

3.3V

LDO

PD +

CHARGE

PUMP

SERIAL

PORT

PROGRAMMABLE

DIVIDER

PRESCALER

MODULUS

INTEGER

FRACTION

VCO

BAND

AND

CURRENT

CAL/SET

PFD

2.5V

LDO

÷2 OR ÷3

÷2 OR ÷4

×2

NC = NO CONNECT

VCC1

DECL1

GND

RSET

REFIN

GND

MUXOUT

DECL2

VCC2

23 GND

24 GND

25 INN

26 INP

27 VCCMIX

28 GND

29 IP3SET

30 GND

22 VCCV2I

21 GND

ADRF6655

WIDEBAND

UP/DOWN

CONVERTER

MUX

ENABLE

VCO

CORE

THIRD-ORDER

SDM

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

VCC1

Power Supply for Internal 3.3 V LDO. The power supply voltage range is 4.75 V to 5.25 V. Supply pin should

be decoupled with 100 pF and 0.1 μF capacitors located close to the pin.

DECL1

Decoupling Node for 3.3 V LDO. Pin should be decoupled with 100 pF, 0.1 μF, and 10 μF capacitors

located close to the pin.

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

4, 7, 11, 15,

20, 21, 23,

24, 28, 30,

31, 35, 36

GND

Ground. Connect these pins to a low impedance ground plane.

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