Data Sheet

ADF4007

Rev. B | Page 5 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

14

13

12

1

3

4

M1

15 MUXOUT

M2

N1

11 N2

CPGND

NOTES

1. THE LFCSP HAS AN EXPOSED PADDLE THAT

MUST BE CONNECTED TO GROUND.

AGND

2

AGND

5

TOP

VIEW

ADF4007

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

CPGND

Charge Pump Ground. The ground return path of the charge pump.

2, 3

AGND

Analog Ground. The ground return path of the prescaler.

4

RF

Complementary Input to the RF Prescaler. This point must be decoupled to the ground plane with a small bypass

capacitor, typically 100 pF.

5

RF

Input to the RF Prescaler. This small signal input is ac-coupled to the external VCO.

6, 7

AV

DD

Analog Power Supply. This pin can range from 2.7 V to 3.3 V. Decoupling capacitors to the analog ground plane

should be placed as close as possible to this pin. AV

8

REF

IN

Reference Input. A CMOS input with a nominal threshold of V

This input can be driven from a TTL or CMOS crystal oscillator, or it can be ac-coupled.

9, 10

DGND

Digital Ground.

11, 12

N2, N1

These two bits set the N value. See Table 4.

13, 14

M2, M1

These two bits set the status of MUXOUT and PFD polarity. See Table 5.

15

MUXOUT

This multiplexer output allows either the N divider output or the R divider output to be accessed externally.

16, 17

DV

DD

Digital Power Supply. This pin can range from 2.7 V to 3.3 V. Decoupling capacitors to the digital ground plane

should be placed as close as possible to this pin. DV

18

V

P

Charge Pump Power Supply. This pin should be greater than or equal to V

set to 5 V and used to drive a VCO with a tuning range of up to 5 V.

19

R

SET

Connecting a resistor between this pin and CPGND sets the maximum charge pump output current. The nominal

voltage potential at the R

SET

MAX

CP

R

I

5

.

25

=

Therefore, if R

20

CP

Charge Pump Output. When enabled, this pin provides ±I

external VCO.

21

EP

Exposed Pad.