CHM1291

Ref. : DSCHM12917166 - 15 Jun 07

1/6

Specifications subject to change without notice

United Monolithic Semiconductors S.A.S.

Route Départementale 128 - B.P.46 - 91401 Orsay Cedex France

Tel. : +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09

25-32GHz Single Side Band Mixer

GaAs Monolithic Microwave IC

Description

The CHM1291 is a multifunction chip (MFC)

which integrates a LO buffer amplifier and a sub-

harmonically balanced diodes mixer for 2LO

suppression and image rejection. It is usable

both for up-conversion and down-conversion. It

is designed for a wide range of applications,

typically commercial communication systems for

broadband local access (LMDS). The backside

of the chip is both RF and DC grounded. This

helps simplify the assembly process.

The circuit is manufactured with a pHEMT

process, 0.25µm gate length, via holes through

the substrate, air bridges and electron beam

gate lithography.

It is available in chip form.

Main Features

■ Broadband performance : 25-32GHz

■ 11dB conversion Loss

■ 15dBc image rejection

■ +5dBm LO input power

■ +1dBm input power (1dB gain comp.)

■ Low DC power consumption, 55mA@3.5V

■ Chip size : 2.06 x 1.25 x 0.10mm

-44

-40

-36

-32

-28

-24

-20

-16

-12

-8

-4

0

4

8

12

16

20

24

28

32

1,5

1,7

1,9

2,1

2,3

2,5

IF Frequency (GHz)

CL sup ( dB )

CL inf ( dB )

Img Supp ( dBc )

P LO @ RF ( dBm )

P 2xLO @ RF ( dBm )

Main Characteristics

Tamb=+25°C

Symbol

Parameter

Min

Typ

Max

Unit

RF frequency range

25

32

GHz

LO frequency range

12

15.5

GHz

IF frequency range

0.1

3

GHz

Conversion Loss

11

15

dB

ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions !

Up-Conversion supradyne mode with external combiner

P LO=+5dBm F LO=14GHz