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

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

5

HMC941LP4 / 941LP4E

v00.0910

0.5 dB LSB GaAs MMIC 5-BIT DIGITAL

ATTENUATOR, 0.1 - 33 GHz

Pad Number

Function

Description

Interface Schematic

1

Vss

Negative Bias -5V

2-4, 6-13,

15-17, 19

n/C

The pins are not connected internally; however, all data

shown herein was measured with these pins connected to

RF/DC ground externally.

5, 14

RF1, RF2

These pins are DC coupled and matched to 50 Ohm. Blocking

capacitors are required if RF line potential is not equal to 0V.

18

Vdd

Positive Bias +5V

20 - 24

P0 - P4

See truth table and control voltage table.

GnD

Package bottom must be connected to RF/DC ground.

Pin Descriptions

Truth Table

Control Voltage Input

Attenuation

State

RF1 - RF2

P4

8 dB

P3

4 dB

P2

2 dB

P1

1 dB

P0

0.5 dB

High

High

High

High

High

Reference I.L.

High

High

High

High

Low

0.5 dB

High

High

High

Low

High

1 dB

High

High

Low

High

High

2 dB

High

Low

High

High

High

4 dB

Low

High

High

High

High

8 dB

Low

Low

Low

Low

Low

15.5 dB

Any Combination of the above states will provide an attenuation

approximately equal to the sum of the bits selected.