14 - 9

14

HMC960LP4E

v00.0211

DC - 100 MHz DUAL DigitAL

VAriAbLe gAin AMpLifier with DriVer

For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com

Application Support: apps@hittite.com

table 4. pin Descriptions

Pin Number

Function

Description

Interface Schematic

1

CMQ

Quadrature (Q) channel output common mode level

2, 3

OQN, OQP

Quadrature (Q) channel positive and negative differential

outputs

4 - 10

GC[6:0]

Gain Control Input Pins

Gain is defined as:

GC[6:0] = 0d —> Gain = 0 dB

GC[6:0] = 1d —> Gain = 0.5 dB

GC[6:0] = 2d —> Gain = 1 dB

GC[6:0] = 79d —> Gain = 39.5 dB

GC[6:0] = 80d —> Gain = 40 dB

11

DVDD

Digital 5V Supply. Must be locally decoupled to GND.

12, 14, 15

SCLK, SDI, SEN

SPI Data clock, data input and enable respectively.

13

SDO

SPI Data Output

16, 17

OIP, OIN

Inphase (I) channel negative and positive differential

outputs respectively

18

CMI

Inphase (I) channel output common mode level