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9

9 - 210

HMC770LP4BE

v00.0909

GaAs pHEMT 50 / 75 Ohm

DIFFERENTIAL AMPLIFIER, 0.04 - 1 GHz

Application Circuit -

for Transimpedance Amplifier Mode for use with 75 Ohm Evaluation Board

Pin Number

Function

Description

Interface Schematic

1, 5

INN, INP

This pin is DC coupled

An off chip DC blocking capacitor is required

11, 15

OUTN, OUTP

This pin is DC coupled

An off chip DC blocking capacitor is required

9, 17

RFCN,

RFCP

RF Choke and DC Bias (Vdd) for the output stage

2 - 4, 6 - 8, 10,

12 - 14, 16, 18, 19

N/C

These pins may be left unconnected.

20

BIAS

This pin is used to set the DC current of the

amplifier by selection of the external bias resistor.

See application circuit.

Package

Base

GND

Package bottom must be

connected to RF/DC ground.

Pin Descriptions