ADF5904

Data Sheet

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

24 GND

23 RX3_RF

22 GND

20 GND

19 RX4_RF

18 GND

17 RX4_O

1

2

3

4

5

6

7

8

GND

RX1_RF

GND

GND

RX2_RF

GND

RX2_O

TOP VIEW

(Not to Scale)

ADF5904

NOTES

1. THE LFCSP HAS AN EXPOSED PAD

THAT MUST BE CONNECTED TO GND.

Figure 4. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 3, 5, 7, 18, 20,

22, 24, 28, 30

GND

Ground Pins.

2

RX1_RF

Channel 1 RF Input.

4, 21, 27

Analog Power Supply. The supply range is 3.3 V ± 5%. Place decoupling capacitors (0.1 µF, 1 nF, and 10 pF)

to the ground plane as close as possible to this pin.

6

RX2_RF

Channel 2 RF Input.

8

RX2_O

Channel 2 Baseband Output.

9

RX2_OB

Channel 2 Complementary Baseband Output.

10

LE

Load Enable, CMOS Input. When LE goes high, data stored in the shift registers is loaded into one of the

four latches; the control bits select the latch.

11

CLK

Serial Clock Input. This serial clock clocks in the serial data to the registers. Data latches into the 32-bit

shift register on the CLK rising edge. This input is a high impedance CMOS input.

12

DATA

Serial Data Input. The serial data loads MSB first and the two LSBs are the control bits.

This input is a high impedance CMOS input.

13

CE

Chip Enable. A logic low on this pin powers down the device.

14

DOUT

Serial Data Output.

15

ATEST

Analog Test Output

16

RX4_OB

Channel 4 Complementary Baseband Output.

17

RX4_O

Channel 4 Baseband Output.

19

RX4_RF

Channel 4 RF Input.

23

RX3_RF

Channel 3 RF Input.

25

RX3_O

Channel 3 Baseband Output.

26

RX3_OB

Channel 3 Complementary Baseband Output.

29

LO_IN

Local Oscillator Input.

31

RX1_OB

Channel 1 Complementary Baseband Output.

32

RX1_O

Channel 1 Baseband Output.

EPAD

Exposed Pad. The LFCSP has an exposed pad that must be connected to GND.

Rev. 0 | Page 6 of 15