ADF4372 datasheet(9/47 Pages) AD

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Data Sheet

ADF4372

Rev. 0 | Page 9 of 47

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

GND 1

CPOUT 2

RS_SW 3

GND

RF16P

RF16N

GND

VCC_MUX

VCC_3V

VDD_NDIV

VDD_LS

SDIO

SCLK

GND

13 14 15 16 17 18 19 20 21 22 23 24

VCC_CAL 4

VTUNE 5

VCC_REG_OUT 6

VCC_VCO 7

VCC_LDO 8

GND 9

NC 10

NC 11

GND 12

TOP VIEW

(Not to Scale)

ADF4372

NOTES

1. THE LAND GRID ARRAY (LGA) HAS AN EXPOSED PAD

THAT MUST BE SOLDERED TO A METAL PLATE ON

THE PCB FOR MECHANICAL REASONS AND TO GND.

Figure 6. Pin Configuration

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 9, 12, 13, 20,

24, 25, 28, 36,

37, 42, 48

GND

Ground Return.

CPOUT

Charge Pump (CP) Output. When enabled, this output provides ±I

CP to the external loop filter. The

output of the loop filter is connected to VTUNE to drive the internal VCO.

RS_SW

Loop Filter Switch. Used for switching loop filter resistors in fast lock applications.

VCC_CAL

Power Supply for Internal Calibration Monitor Circuit. The voltage on this pin ranges from 3.15 V to

3.45 V. VCC_CAL must have the same value as AV

DD, nominally 3.3 V.

VTUNE

Control Input to the VCO. This voltage determines the output frequency and is derived from filtering

the CPOUT output voltage.

VCC_REG_OUT

VCO Supply Regulator Out. The output supply voltage of the VCO regulator is available at this pin, and

must be decoupled to GND with a 10 μF capacitor and shorted to the VCC_VCO pin. Leave this pin

open if an external LDO regulator is connected to VCC_VCO.

VCC_VCO

Power Supply for the VCO. The voltage on this pin ranges from 4.75 V to 5.25 V. Place decoupling

capacitors to the analog ground plane as close to this pin as possible. For optimal performance, this

supply must be clean and have low noise.

VCC_LDO

Supply Pin to the VCO Regulator. If the internal regulator is used, connect the voltage supply to

VCC_LDO. The voltage on this pin ranges from 4.75 V to 5.25 V. If the external regulator is used, short

this pin to VCC_VCO.

10, 11

No Connect.

14, 16

VCC_X1

Power Supply for the Main RF Output. The voltage on this pin must have the same value as AV

DD.

15, 17

VDD_X1

Digital Supply for the Main RF Circuit. The voltage on this pin must have the same value as AV

DD.

RF8P

Main RF Output. AC couple to the next stage. The output level is programmable. The VCO fundamental

output or a divided down version is available.

RF8N

Complementary Main RF Output. AC couple this pin to the next stage. The output level is

programmable. The VCO fundamental output or a divided down version is available.

VCC_X2

Power Supply for the Doubled RF Output. The voltage on this pin must have the same value as AV

DD.

RFAUX8P

Auxiliary RF Output. AC couple to the next stage. This pin can be powered off when not in use.

RFAUX8N

Complementary Auxiliary RF Output. AC couple this pin to the next stage. This pin can be powered off

when not in use.

RF16P

Doubled VCO Output. AC or dc couple this pin to the next stage. This pin can be powered off when not

in use. If unused, this pin can be left open.

RF16N

Complementary Doubled VCO Output. AC or dc couple this pin to the next stage. This pin can be

powered off when not in use. If unused, this pin can be left open.

ADF4372 Datasheet(PDF) 9 Page - Analog Devices

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