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

10

10 - 9

Evaluation PCB

The circuit board used in the application should use

rF circuit design techniques. signal lines should

have 50 Ohm impedance while the package ground

leads and exposed paddle 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 circuit board shown is available from Hit-

tite upon request.

item

Description

J1 - J3

sMA Connector

J4 - J7

DC Pin

C19

22 pF Capacitor, 0402 Pkg.

C7, C8

10 nF Capacitor, 0402 Pkg.

C10, C12, C16, C18

1 nF Capacitor, 0402 Pkg.

C11, C15, C17, C21

0.1 µF Capacitor, 0402 Pkg.

C20

4.7 µF Case A, Tantulum

r2 - r4, r7, r8

0 Ohm resistor, 0402 Pkg.

r9

270 Ohm resistor, 0603 Pkg.

T1

1:1 Transformer - Tyco MABA CT0039

U1

HMC685LP4(e) Downconverter

118162 evaluation PCB

[1] reference this number when ordering complete evaluation PCB

[2] Circuit Board Material: Arlon 25r, Fr4

HMC685LP4 / 685LP4E

v04.0110

BiCMOS MMIC MIXER W/ INTEGRATED

LO AMPLIFIER, 1.7 - 2.2 GHz