5

5 - 175

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

Evaluation PCB

The circuit board used in the final application should

use RF circuit design techniques. Signal lines

should have 50 ohm impedance while the package

ground leads and exposed paddle should be con-

nected directly to the ground plane similar to that

shown. A sufficient number of via holes should be

used to connect the top and bottom ground planes.

The evaluation circuit board shown is available from

Hittite upon request.

Item

Description

J1 - J2

PCB Mount SMA Connector

J3 - J8

DC Pin

C1 - C3

1000 pF Capacitor, 0402 Pkg.

C4, C5

330 pF Capacitor, 0402 Pkg.

U1

HMC540LP3 / HMC540LP3E

Digital Attenuator

111291 Evaluation PCB

[1] Reference this number when ordering complete evaluation PCB

[2] Circuit Board Material: Rogers 4350

1 dB LSB GaAs MMIC 4-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz

v00.0605