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| CHT3091A 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, 0.7m gate length, via holes through the substrate and air bridges. . Main Features Broadband performances : DC-40GHz 15dBm minimum input 1dB compression point ( any attenuation) DC bias : -5V Tamb. = 25C Symbol Fin Min Att. Max Att. VSWRin Parameter Input frequency range Minimum attenuation |S21| (VS=0V;VP=-5V) Maximum attenuation |S21| (VS=-5V;VP=0V) Input VSWR (any attenuation) Min DC Typ Max 40 Unit GHz dB dB 3 20 2.:1 2.:1 15 VSWRout Output VSWR (any attenuation) Pin1dB Input 1dB compression point.(any attenuation) dBm ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions ! Ref. : DSCHT30911074 -15-Mar.-01 1/4 Specifications subject to change without notice United Monolithic Semiconductors S.A.S. Route Departementale 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 Absolute Maximum Ratings Tamb. = 25C (1) Symbol VP VS Pin Ta Tstg (1) VP control voltage VS control voltage RF input power Operating temperature range Storage temperature range Parameter DC-40GHz Attenuator Values -6V -6V 20 -40 to +85 -55 to +155 Unit V V dBm C C 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. 25m diameter gold wire is to be prefered. Bonding pad positions. ( Chip thickness : 100m. All dimensions are in micrometers ) Ref. : DSCHT30911074 -15-Mar.-01 2/4 Specifications subject to change without notice Route Departementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09 DC-40GHz Attenuator Typical Results Chip Typical Response ( On wafer Sij ) : Tamb = +25C Vp = 0V to -5V & Vs = -5V to 0V 0 -2 -4 -6 -8 -10 Insertion Loss ( dB ) -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -5 -4 -3 -2 Frequency ( GHz ) 5 10 20 30 40 CHT3091A CHT3091 Insertion Loss vs Control Voltages as Function of FREQUENCY ( GHz ) -1 0 Vp Control Voltage ( Volt ) with Vs = -5 - Vp 0 -2 -4 -6 -8 -10 Insertion Loss ( dB ) -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 0 5 10 15 20 25 30 Frequency ( GHz ) 35 40 45 50 55 60 CHT3091 Gain control vvRef. : DSCHT30911074 -15-Mar.-01 3/4 Specifications subject to change without notice Route Departementale 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 0 -2 -4 -6 -8 Input Return Loss ( dB ) -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 0 5 10 15 20 25 30 Frequency ( GHz ) 0 -2 -4 -6 -8 Output Return Loss ( dB ) -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 0 5 10 15 20 25 30 Frequency ( GHz ) 35 35 DC-40GHz Attenuator CHT3091 Input Return Loss 40 45 50 55 60 CHT3091 Output Return Loss 40 45 50 55 60 Ordering Information Chip form : CHT3091A-99F/00 Information furnished is believed to be accurate and reliable. However United Monolithic Semiconductors S.A.S. assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of United Monolithic Semiconductors S.A.S.. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. United Monolithic Semiconductors S.A.S. products are not authorised for use as critical components in life support devices or systems without express written approval from United Monolithic Semiconductors S.A.S. Ref. : DSCHT30911074 -15-Mar.-01 4/4 Specifications subject to change without notice Route Departementale 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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