ADF5000

Rev. 0 | Page 5 of 12

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

NOTES

1. NC = NO CONNECT. DO NOT CONNECT

TO THIS PIN.

2. THE EXPOSED PADDLE MUST BE

CONNECTED TO GND.

1

GND

2

RFIN

3

GND

4

GND

11 RFOUT

12 GND

10 RFOUT

9

GND

TOP VIEW

(Not to Scale)

ADF5000

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 3, 4, 5, 8, 9,

12, 13, 16

GND

RF Ground. Tie all ground pins together.

2

RFIN

Single-Ended 50 Ω Input to the RF Prescaler. This pin is ac-coupled internally via a 3 pF capacitor.

6

NC

No Connect. Do not connect to this pin.

7

CE

Chip Enable. This pin is active high. When CE is brought low, the part enters power-down mode. If this

functionality is not required, the pin can be left unconnected because it is pulled up internally through

a weak pull-up resistor.

10

RFOUT

Divided-Down Output of the Prescaler. This pin has an internal 100 Ω load resistor tied to VDD2 and an

ac coupling capacitor of 1 pF.

11

RFOUT

Complementary Divided Down Output of the Prescaler. This pin has an internal 100 Ω load resistor tied

to VDD2 and an ac coupling capacitor of 1 pF.

14

VDD2

Voltage Supply for the Output Stage. Decouple this pin to ground with a 0.1 µF capacitor in parallel with a

10 pF capacitor. VDD2 can be tied directly to VDD1.

15

VDD1

Voltage Supply for the Input Stage and Divider Block. Decouple this pin to ground with a 0.1 µF capacitor

in parallel with a 10 pF capacitor.

EPAD

The LFCSP has an exposed paddle that must be connected to GND.