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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

900 MHz Application Circuit, Compact Layout

Recommended Component Values

L1, L2

1 nH

L3

36 nH

R1

5.1 Ohms

C1

8 pF

C2

22 pF

C3

2.7 pF

C4, C6

100 pF

C5

2.2 μF

TL1

Impedance

50 Ohm

Physical Length

0.050”

Electrical Length

2.5°

PCB Material: 10 mil Rogers 4350,

Er = 3.48

This circuit was used to specify the performance for 894-960 MHz operation. This circuit will satisfy many applications

from 700 to 1200 MHz. Contact the HMC Applications Group for assistance in optimizing performance for your

application.

Pin Descriptions

Pin Number

Function

Description

Interface Schematic

1

RFIN

This pin is AC coupled.

Off chip matching components are required.

See Application Circuit herein.

3

RFOUT

RF output and DC Bias input for the output amplifier stage.

Off chip matching components are required.

See Application Circuit herein.

2,4

GND

These pins & package bottom must be connected to

RF/DC ground.

HMC454ST89 / 454ST89E

v04.0907

InGaP HBT ½ WATT HIGH IP3

AMPLIFIER, 0.4 - 2.5 GHz