8

8 - 250

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 - 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

v03.0409

BiCMOS MMIC MIXER W/ INTEGRATED

LO AMPLIFIER, 1.7 - 2.2 GHz