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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 Circuit Board

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 ground paddle

should be connected directly to the ground plane

similar to that shown below. A sufficient number of

VIA holes should be used to connect the top and

bottom ground planes. The evaluation circuit board

as shown is available from Hittite Microwave Corpo-

ration upon request.

Item

Description

J1 - J2

PCB Mount SMA Connector

J3

2 mm Molex Header

C1, C2

100 pF Capacitor, 0402 Pkg.

C3

0.01 μF Capacitor, 0402 Pkg.

R1

5k Ohm Resistor, 0402 Pkg.

U1

HMC271LP4 / HMC271LP4E

Digital Attenuator

108780 Evaluation PCB

[1] Reference this number when ordering complete evaluation PCB

[2] Circuit Board Material: Rogers 4350

1 dB LSB GaAs MMIC 5-BIT SERIAL

CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz

v02.0705