CHM1291
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 PM-HEMT
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
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Broadband performances : 25-32GHz
11dB conversion Loss
15dBc image rejection
+5dBm LO input power
+5dBm input power (1dB gain comp.)
Low DC power consumption, 55mA@3.5V
Chip size : 2.06 x 1.25 x 0.10 mm
Main Characteristics
Tamb. = 25°C
Parameter
Min
Typ
Max
Unit
F
RF
F
LO
F
IF
L
c
RF frequency range
LO frequency range
IF frequency range
Conversion Loss
25
12
0.1
11
32
15.5
3
15
GHz
GHz
GHz
dB
ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions !
Ref. : DSCHM12912266 - 23-Sept.-02
1/6
Specifications subject to change without notice
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
UMS [ UNITED MONOLITHIC SEMICONDUCTORS ]
