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CHT3091a
RoHS COMPLIANT
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.
It is supplied in chip form.
Main Features
Insertion Loss ( dB )
.
DC-40GHz
0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 0 5 10 15 20 25 30 Frequency ( GHz )
Broadband performances:
15dBm minimum input 1dB compression point (any attenuation) DC bias : -5VCHT3091 Gain control
35
40
Main Characteristics
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. : DSCHT3091a6354 - 20 Dec 06 1/8 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
Electrical Characteristics (1)
Tamb = +25C Symbol
Fin
Attenuator
Parameter
Input frequency range Minimum attenuation |S21| (VS=0V;VP=-5V) DC-10GHz DC-20GHz DC-40GHz Maximum attenuation |S21| (VS=-5V;VP=0V) DC-10GHz DC-20GHz DC-40GHz Input VSWR (any attenuation)
Min
DC
Typ
Max
40
Unit
GHz
Min Att.
2.2 3 3.5
4
dB dB dB
Max Att.
23 21 17
15 2:1 2:1
dB dB dB
VSWRin
VSWRout Output VSWR (any attenuation) Pin1dB Input 1dB compression point.(any attenuation) 15
dBm
(1) These values are representative of on-wafer measurements that are made without bonding wires at the RF ports.
Absolute Maximum Ratings
Tamb. = 25C (1) Symbol VP VS Pin Ta Tstg VP control voltage VS control voltage RF input power Operating temperature range Storage temperature range Parameter Values -6V -6V 20 -40 to +85 -55 to +155 Unit V V dBm C C
(1) Operation of this device above anyone of these parameters may cause permanent damage.
Ref. : DSCHT3091a6354 - 20 Dec 06
2/8
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
Attenuator
Typical Result
Chip Typical Response (On wafer Sij): Tamb = +25C Vp=0V Vs=-5V
Frequency GHz 1.000 2.000 3.000 4.000 5.000 6.000 7.000 8.000 9.000 10.000 11.000 12.000 13.000 14.000 15.000 16.000 17.000 18.000 19.000 20.000 21.000 22.000 23.000 24.000 25.000 26.000 27.000 28.000 29.000 30.000 31.000 32.000 33.000 34.000 35.000 36.000 37.000 38.000 39.000 40.000 MS11 mod dB -2,53E+01 -2,47E+01 -2,46E+01 -2,44E+01 -2,42E+01 -2,39E+01 -2,36E+01 -2,32E+01 -2,29E+01 -2,26E+01 -2,22E+01 -2,19E+01 -2,16E+01 -2,13E+01 -2,10E+01 -2,07E+01 -2,04E+01 -2,02E+01 -1,98E+01 -1,97E+01 -1,93E+01 -1,92E+01 -1,90E+01 -1,87E+01 -1,86E+01 -1,83E+01 -1,82E+01 -1,79E+01 -1,78E+01 -1,77E+01 -1,74E+01 -1,72E+01 -1,69E+01 -1,67E+01 -1,63E+01 -1,60E+01 -1,58E+01 -1,54E+01 -1,50E+01 -1,47E+01 PS11 pha deg -7,45E+00 -1,19E+01 -1,80E+01 -2,33E+01 -2,90E+01 -3,43E+01 -3,92E+01 -4,32E+01 -4,77E+01 -5,20E+01 -5,56E+01 -5,90E+01 -6,18E+01 -6,51E+01 -6,81E+01 -6,99E+01 -7,28E+01 -7,49E+01 -7,70E+01 -7,93E+01 -8,08E+01 -8,26E+01 -8,35E+01 -8,54E+01 -8,60E+01 -8,71E+01 -8,86E+01 -8,90E+01 -8,92E+01 -9,00E+01 -9,07E+01 -9,05E+01 -9,02E+01 -8,99E+01 -9,09E+01 -8,99E+01 -9,11E+01 -9,10E+01 -9,00E+01 -9,03E+01 MS12 mod dB -2,24E+01 -2,24E+01 -2,24E+01 -2,24E+01 -2,24E+01 -2,23E+01 -2,23E+01 -2,23E+01 -2,22E+01 -2,22E+01 -2,21E+01 -2,21E+01 -2,20E+01 -2,19E+01 -2,18E+01 -2,17E+01 -2,16E+01 -2,15E+01 -2,13E+01 -2,11E+01 -2,10E+01 -2,08E+01 -2,06E+01 -2,04E+01 -2,01E+01 -1,99E+01 -1,96E+01 -1,95E+01 -1,93E+01 -1,90E+01 -1,87E+01 -1,85E+01 -1,81E+01 -1,79E+01 -1,76E+01 -1,73E+01 -1,71E+01 -1,68E+01 -1,66E+01 -1,63E+01
3/8
CHT3091a
PS12 pha deg -1,90E+00 -3,81E+00 -5,50E+00 -7,42E+00 -9,20E+00 -1,12E+01 -1,29E+01 -1,43E+01 -1,63E+01 -1,81E+01 -2,01E+01 -2,17E+01 -2,34E+01 -2,52E+01 -2,70E+01 -2,88E+01 -3,04E+01 -3,23E+01 -3,43E+01 -3,59E+01 -3,84E+01 -4,03E+01 -4,28E+01 -4,49E+01 -4,70E+01 -4,95E+01 -5,21E+01 -5,44E+01 -5,74E+01 -6,03E+01 -6,32E+01 -6,59E+01 -6,98E+01 -7,31E+01 -7,62E+01 -8,02E+01 -8,40E+01 -8,81E+01 -9,15E+01 -9,53E+01
MS21 mod dB -2,24E+01 -2,23E+01 -2,23E+01 -2,24E+01 -2,23E+01 -2,23E+01 -2,23E+01 -2,22E+01 -2,22E+01 -2,21E+01 -2,21E+01 -2,20E+01 -2,19E+01 -2,19E+01 -2,18E+01 -2,17E+01 -2,15E+01 -2,15E+01 -2,13E+01 -2,11E+01 -2,09E+01 -2,08E+01 -2,06E+01 -2,04E+01 -2,02E+01 -2,00E+01 -1,98E+01 -1,95E+01 -1,92E+01 -1,90E+01 -1,87E+01 -1,85E+01 -1,82E+01 -1,79E+01 -1,77E+01 -1,73E+01 -1,71E+01 -1,68E+01 -1,67E+01 -1,64E+01
PS21 pha deg -2,14E+00 -3,70E+00 -5,54E+00 -7,55E+00 -9,27E+00 -1,13E+01 -1,31E+01 -1,46E+01 -1,68E+01 -1,88E+01 -2,04E+01 -2,24E+01 -2,42E+01 -2,60E+01 -2,78E+01 -2,97E+01 -3,15E+01 -3,32E+01 -3,51E+01 -3,72E+01 -3,96E+01 -4,20E+01 -4,38E+01 -4,59E+01 -4,81E+01 -5,09E+01 -5,31E+01 -5,62E+01 -5,85E+01 -6,17E+01 -6,47E+01 -6,77E+01 -7,11E+01 -7,45E+01 -7,72E+01 -8,13E+01 -8,51E+01 -8,99E+01 -9,32E+01 -9,77E+01
MS22 mod dB -2,43E+01 -2,45E+01 -2,43E+01 -2,41E+01 -2,38E+01 -2,35E+01 -2,33E+01 -2,29E+01 -2,27E+01 -2,23E+01 -2,18E+01 -2,16E+01 -2,13E+01 -2,07E+01 -2,06E+01 -2,03E+01 -1,99E+01 -1,97E+01 -1,93E+01 -1,90E+01 -1,86E+01 -1,84E+01 -1,82E+01 -1,79E+01 -1,78E+01 -1,70E+01 -1,71E+01 -1,67E+01 -1,66E+01 -1,68E+01 -1,61E+01 -1,62E+01 -1,60E+01 -1,52E+01 -1,49E+01 -1,46E+01 -1,46E+01 -1,55E+01 -1,34E+01 -1,37E+01
PS22 pha deg -5,46E+00 -1,20E+01 -1,80E+01 -2,43E+01 -2,97E+01 -3,56E+01 -4,04E+01 -4,43E+01 -4,96E+01 -5,38E+01 -5,64E+01 -6,05E+01 -6,32E+01 -6,69E+01 -6,91E+01 -7,09E+01 -7,48E+01 -7,64E+01 -7,85E+01 -8,02E+01 -8,19E+01 -8,31E+01 -8,43E+01 -8,81E+01 -8,83E+01 -8,99E+01 -9,26E+01 -9,15E+01 -9,34E+01 -9,20E+01 -9,23E+01 -9,71E+01 -9,57E+01 -9,89E+01 -1,01E+02 -9,37E+01 -9,89E+01 -1,04E+02 -1,02E+02 -1,05E+02
Ref. DSCHT3091a6354 - 20 Dec 06
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
Tamb = +25C Vp=-5V Vs=0V
Frequency GHz 1.000 2.000 3.000 4.000 5.000 6.000 7.000 8.000 9.000 10.000 11.000 12.000 13.000 14.000 15.000 16.000 17.000 18.000 19.000 20.000 21.000 22.000 23.000 24.000 25.000 26.000 27.000 28.000 29.000 30.000 31.000 32.000 33.000 34.000 35.000 36.000 37.000 38.000 39.000 40.000 MS11 mod dB -1,68E+01 -1,59E+01 -1,57E+01 -1,54E+01 -1,50E+01 -1,44E+01 -1,41E+01 -1,37E+01 -1,30E+01 -1,28E+01 -1,25E+01 -1,23E+01 -1,22E+01 -1,20E+01 -1,19E+01 -1,19E+01 -1,18E+01 -1,18E+01 -1,19E+01 -1,20E+01 -1,20E+01 -1,22E+01 -1,25E+01 -1,28E+01 -1,32E+01 -1,37E+01 -1,42E+01 -1,49E+01 -1,57E+01 -1,66E+01 -1,77E+01 -1,92E+01 -2,10E+01 -2,29E+01 -2,63E+01 -3,12E+01 -3,55E+01 -3,11E+01 -2,50E+01 -2,27E+01 PS11 pha deg -1,62E+01 -2,74E+01 -3,97E+01 -5,27E+01 -6,26E+01 -7,38E+01 -8,31E+01 -8,94E+01 -9,89E+01 -1,07E+02 -1,14E+02 -1,21E+02 -1,27E+02 -1,34E+02 -1,40E+02 -1,45E+02 -1,50E+02 -1,56E+02 -1,61E+02 -1,66E+02 -1,71E+02 -1,77E+02 1,78E+02 1,73E+02 1,68E+02 1,62E+02 1,56E+02 1,51E+02 1,45E+02 1,41E+02 1,34E+02 1,29E+02 1,22E+02 1,11E+02 1,01E+02 7,94E+01 2,69E+01 -3,53E+01 -6,00E+01 -7,35E+01 MS12 mod dB -2,09E+00 -1,92E+00 -1,98E+00 -2,07E+00 -2,13E+00 -2,20E+00 -2,30E+00 -2,34E+00 -2,41E+00 -2,53E+00 -2,62E+00 -2,72E+00 -2,82E+00 -2,91E+00 -3,00E+00 -3,07E+00 -3,14E+00 -3,22E+00 -3,29E+00 -3,31E+00 -3,35E+00 -3,41E+00 -3,41E+00 -3,43E+00 -3,46E+00 -3,47E+00 -3,44E+00 -3,52E+00 -3,51E+00 -3,49E+00 -3,45E+00 -3,45E+00 -3,40E+00 -3,43E+00 -3,42E+00 -3,41E+00 -3,39E+00 -3,41E+00 -3,45E+00 -3,54E+00 PS12 pha deg -5,63E+00 -1,10E+01 -1,61E+01 -2,15E+01 -2,65E+01 -3,19E+01 -3,67E+01 -4,12E+01 -4,69E+01 -5,18E+01 -5,65E+01 -6,13E+01 -6,60E+01 -7,06E+01 -7,52E+01 -7,98E+01 -8,44E+01 -8,89E+01 -9,35E+01 -9,78E+01 -1,03E+02 -1,07E+02 -1,12E+02 -1,16E+02 -1,21E+02 -1,26E+02 -1,31E+02 -1,36E+02 -1,40E+02 -1,46E+02 -1,51E+02 -1,56E+02 -1,61E+02 -1,67E+02 -1,72E+02 -1,78E+02 1,77E+02 1,70E+02 1,64E+02 1,58E+02 MS21 mod dB -1,91E+00 -1,88E+00 -1,94E+00 -2,03E+00 -2,09E+00 -2,17E+00 -2,26E+00 -2,29E+00 -2,40E+00 -2,49E+00 -2,61E+00 -2,69E+00 -2,80E+00 -2,88E+00 -2,99E+00 -3,09E+00 -3,13E+00 -3,22E+00 -3,28E+00 -3,31E+00 -3,34E+00 -3,41E+00 -3,43E+00 -3,47E+00 -3,51E+00 -3,52E+00 -3,54E+00 -3,53E+00 -3,50E+00 -3,49E+00 -3,49E+00 -3,52E+00 -3,48E+00 -3,46E+00 -3,48E+00 -3,46E+00 -3,47E+00 -3,41E+00 -3,49E+00 -3,55E+00 PS21 pha deg -5,65E+00 -1,08E+01 -1,61E+01 -2,15E+01 -2,66E+01 -3,20E+01 -3,70E+01 -4,16E+01 -4,73E+01 -5,24E+01 -5,69E+01 -6,20E+01 -6,66E+01 -7,14E+01 -7,61E+01 -8,06E+01 -8,52E+01 -8,97E+01 -9,45E+01 -9,88E+01 -1,04E+02 -1,08E+02 -1,13E+02 -1,18E+02 -1,22E+02 -1,27E+02 -1,32E+02 -1,37E+02 -1,42E+02 -1,47E+02 -1,52E+02 -1,57E+02 -1,63E+02 -1,68E+02 -1,74E+02 -1,79E+02 1,75E+02 1,68E+02 1,63E+02 1,57E+02
Attenuator
MS22 mod dB -1,61E+01 -1,59E+01 -1,55E+01 -1,52E+01 -1,48E+01 -1,42E+01 -1,39E+01 -1,35E+01 -1,28E+01 -1,24E+01 -1,22E+01 -1,19E+01 -1,17E+01 -1,15E+01 -1,14E+01 -1,14E+01 -1,12E+01 -1,13E+01 -1,13E+01 -1,14E+01 -1,14E+01 -1,16E+01 -1,19E+01 -1,19E+01 -1,22E+01 -1,25E+01 -1,28E+01 -1,36E+01 -1,40E+01 -1,47E+01 -1,58E+01 -1,62E+01 -1,74E+01 -1,86E+01 -1,99E+01 -2,38E+01 -2,35E+01 -2,30E+01 -2,35E+01 -2,28E+01
PS22 pha deg -1,48E+01 -2,75E+01 -3,99E+01 -5,27E+01 -6,32E+01 -7,42E+01 -8,28E+01 -8,91E+01 -9,87E+01 -1,07E+02 -1,13E+02 -1,20E+02 -1,26E+02 -1,32E+02 -1,37E+02 -1,43E+02 -1,48E+02 -1,53E+02 -1,58E+02 -1,62E+02 -1,66E+02 -1,72E+02 -1,76E+02 1,80E+02 1,75E+02 1,72E+02 1,67E+02 1,64E+02 1,60E+02 1,53E+02 1,50E+02 1,48E+02 1,43E+02 1,49E+02 1,51E+02 1,51E+02 1,58E+02 1,49E+02 -1,63E+02 -1,64E+02
Ref. : DSCHT3091a6354 - 20 Dec 06
4/8
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
Attenuator
Typical Results
Chip Typical Response (On wafer Sij):
Tamb = +25C Vp = 0V to -5V & Vs = -5V to 0V
0 -2 -4 -6 -8 Insertion Loss ( dB ) -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -5 -4 -3 -2
Frequency ( GHz )
CHT3091a
CHT3091 Insertion Loss vs Control Voltages as Function of FREQUENCY ( GHz )
5 10 20 30 40
-1
0
Vp Control Voltage ( Volt ) with Vs = -5 - Vp 0 -2 -4 -6 -8 Insertion Loss ( dB ) -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 0 5 10 15 20 25 30 35 40 45 50 55 60 Frequency ( GHz )
CHT3091 Gain control
Ref. DSCHT3091a6354 - 20 Dec 06
5/8
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
Attenuator
0 -2 -4 -6 -8 -1 0
Input Return Loss ( dB )
C H T3091 In p u t R e tu rn L o s s
-1 2 -1 4 -1 6 -1 8 -2 0 -2 2 -2 4 -2 6 -2 8 -3 0 0 5 10 15 20 25 30 35 40 45 50 55 60 F re q u e n c y ( G H z )
0 -2 -4 -6 -8
C H T3091 O u tp u t R e tu rn L o s s
Output Return Loss ( dB )
-1 0 -1 2 -1 4 -1 6 -1 8 -2 0 -2 2 -2 4 -2 6 -2 8 -3 0 0 5 10 15 20 25 30 35 40 45 50 55 60 F re q u e n c y ( G H z )
Ref. : DSCHT3091a6354 - 20 Dec 06
6/8
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
Attenuator
Chip Assembly and Mechanical Data
CHT3091a
Note : Supply feed might be capacitively bypassed. 25m diameter gold wire is to be prefered.
Bonding pad positions.
(Chip thickness: 100m. All dimensions are in micrometers)
Ref. DSCHT3091a6354 - 20 Dec 06 7/8 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
Attenuator
Ordering Information
Chip form: CHT3091a99F/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. : DSCHT3091a6354 - 20 Dec 06 8/8 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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