For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, 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

8

8 - 109

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 package bottom should

be connected 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 board should be mounted

to an appropriate heat sink. The evaluation circuit

board shown is available from Hittite upon request.

Item

Description

J1 - J2

PC Mount SMA Connector

J3 - J4

DC Pin

C1 - C3

100 pF Capacitor, 0402 Pkg.

C4

1000 pF Capacitor, 0603 Pkg.

C5

2.2 μF Capacitor, Tantalum

R1

Resistor, 1210 Pkg.

L1

18 nH Inductor, 0603 Pkg.

U1

HMC478ST89 / HMC478ST89E

108370 Evaluation PCB

[1] Reference this number when ordering complete evaluation PCB

[2] Circuit Board Material: Rogers 4350

SiGe HBT GAIN BLOCK

MMIC AMPLIFIER, DC - 4 GHz

v05.0710