United Monolithic Semiconductors CHT3091a-99F-00 Datasheet
DC-40GHz ATTENUATOR
GaAs Monolithic Microwave IC
Description
The CHT3091a is a variable DC-40GHz
attenuator designed for a wide range of
applications, from military to commercial
communication systems. The backside of the
chip is both RF and DC grounds. This helps
simplify the assembly process.
The circuit is manufactured with a MESFET
process, 0.7µm gate length, via holes through
the substrate and air bridges.
CHT3091a
.
Main Features
■ Broadband performances : DC-40GHz
■ 15dBm minimum input 1dB compression point
( any attenuation)
■ DC bias : -5V<VS<0V ; -5V<VP<0V
■ Chip size : 0.91 x 0.86 x 0.10 mm
Main Characteristics
Tamb. = 25°C
Symbol Parameter Min Typ Max Unit
Fin Input frequency range DC 40 GHz
Min Att. Minimum attenuation |S21| (VS=0V;VP=-5V) 3 dB
Max Att. Maximum attenuation |S21| (VS=-5V;VP=0V) 20 dB
VSWRin Input VSWR (any attenuation) 2.:1
VSWRout Output VSWR (any attenuation) 2.:1
Pin1dB Input 1dB compression point.(any attenuation) 15 dBm
ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions !
Ref. : DSCHT30911074 -15-Mar.-01 1/4 Specifications subject to change without notic e
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
CHT3091a
DC-40GHz Attenuator
Absolute Maximum Ratings
Tamb. = 25°C (1)
Symbol Parameter Values Unit
VP VP control voltage -6V V
VS VS control voltage -6V V
Pin RF input power 20 dBm
Ta Operating temperature range -40 to +85 °C
Tstg Storage temperature range -55 to +155 °C
(1) Operation of this device above anyone of these parameters may cause permanent damage.
Chip Assembly and Mechanical Data
Note : Supply feed should be capacitively bypassed. 25µm diameter gold wire is to be prefered.
Bonding pad positions.
( Chip thickness : 100µm. All dimensions are in micrometers )
Ref. : DSCHT30911074 -15-Mar.-01 2/4 Specifications subject to change without notic e
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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