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CHM1290REF Schematic ( PDF Datasheet ) - United Monolithic Semiconductors

Teilenummer CHM1290REF
Beschreibung 20-30GHz SUB-HARMONICALLY PUMPED MIXER
Hersteller United Monolithic Semiconductors
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Gesamt 8 Seiten
CHM1290REF Datasheet, Funktion
CHM1290REF
20-30GHz SUB-HARMONICALLY PUMPED MIXER
GaAs Monolithic Microwave IC in SMD leadless package
Description
The monolithic microwave IC (MMIC) in the
package is a multi-function chip which
integrates a self biased LO buffer amplifier
and a sub-harmonic diode mixer for 2LO
suppression. It is usable both for up- and
down-conversion and it is designed for a
wide range of applications, typically
commercial communication systems for
broadband local access (LMDS).
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
supplied in a new SMD-type leadless chip
carrier.
SMD Package Dimensions
Main Features
Broadband performance : 20-30GHz
10.5 dB conversion Loss
-25dBm 2LO Power @ RF port
-4dBm LO input power
-3dBm input power 1dB compression
Low DC power consumption,
33mA@ 3.0V
Dimensions: 5.08 x 5.08 x 0.97 mm3
Ref.: DSCCHM1290REF2239 -27-Aug.-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






CHM1290REF Datasheet, Funktion
CHM1290REF
20-30GHz SHP Mixer
The RF ports comprise a DC blocking capacitor on chip level. The DC connections
include a first level of DC decoupling capacitors (typically 120pF) in the package.
However, all DC bias ports should be additionally connected to ground with 10nF
capacitors at board level to prevent the MMIC from oscillations. These parts should
be placed close to the SMD leadless package. If the same bias is required at different
DC ports, the lines should only be connected behind these block capacitors.
Further information on the application of the SMD leadless packages for GaAs
monolithic microwave ICs are given in the UMS Application Note AN0005.
Ref. : DSCCHM1290REF2239 -27-Aug.-02
6/6
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

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