cht3091a rohs compliant ref. : dscht3091a6354 - 20 dec 06 1/ 8 specifications subject to change without notice united monolithic semiconductors s.a.s. route dpartementale 128 - b.p.46 - 91401 orsay cede x france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 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 broadband performances: dc-40ghz 15dbm minimum input 1db compression point (any attenuation) dc bias : -5v cht3091a dc-40ghz attenuator ref. : dscht3091a6354 - 20 dec 06 2/ 8 specifications subject to change without notice route dpartementale 128, b.p.46 - 91401 orsay ced ex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 electrical characteristics (1) tamb = +25c symbol parameter min typ max unit fin input frequency range dc 40 ghz min att. minimum attenuation |s21| (vs=0v;vp=-5v) dc-10gh z dc-20gh z dc-40gh z 2.2 3 3.5 4 db db db max att. maximum attenuation |s21| (vs=-5v;vp=0v) dc-10gh z dc- 20ghz dc-40ghz 23 21 17 15 db db db vswrin input vswr (any attenuation) 2:1 vswrout output vswr (any attenuation) 2:1 pin1db input 1db compression point.(any attenuation ) 15 dbm (1) these values are representative of on-wafer mea surements that are made without bonding wires at the rf ports. absolute maximum ratings tamb. = 25c (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.
dc-40ghz attenuator cht3091a ref. dscht3091a6354 - 20 dec 06 3/ 8 specifications subject to change without notice route dpartementale 128, b.p.46 - 91401 orsay ced ex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 typical result chip typical response (on wafer sij): tamb = +25c vp=0v vs=-5v frequency ms11 ps11 ms12 ps12 ms21 ps21 ms22 ps22 mod pha mod pha mod pha mod pha ghz db deg db deg db deg db deg 1.000 -2,53e+01 -7,45e+00 -2,24e+01 -1,90e+00 -2,24e+01 -2,14e+00 -2,43e+01 -5,46e+00 2.000 -2,47e+01 -1,19e+01 -2,24e+01 -3,81e+00 -2,23e+01 -3,70e+00 -2,45e+01 -1,20e+01 3.000 -2,46e+01 -1,80e+01 -2,24e+01 -5,50e+00 -2,23e+01 -5,54e+00 -2,43e+01 -1,80e+01 4.000 -2,44e+01 -2,33e+01 -2,24e+01 -7,42e+00 -2,24e+01 -7,55e+00 -2,41e+01 -2,43e+01 5.000 -2,42e+01 -2,90e+01 -2,24e+01 -9,20e+00 -2,23e+01 -9,27e+00 -2,38e+01 -2,97e+01 6.000 -2,39e+01 -3,43e+01 -2,23e+01 -1,12e+01 -2,23e+01 -1,13e+01 -2,35e+01 -3,56e+01 7.000 -2,36e+01 -3,92e+01 -2,23e+01 -1,29e+01 -2,23e+01 -1,31e+01 -2,33e+01 -4,04e+01 8.000 -2,32e+01 -4,32e+01 -2,23e+01 -1,43e+01 -2,22e+01 -1,46e+01 -2,29e+01 -4,43e+01 9.000 -2,29e+01 -4,77e+01 -2,22e+01 -1,63e+01 -2,22e+01 -1,68e+01 -2,27e+01 -4,96e+01 10.000 -2,26e+01 -5,20e+01 -2,22e+01 -1,81e+01 -2,21e+01 -1,88e+01 -2,23e+01 -5,38e+01 11.000 -2,22e+01 -5,56e+01 -2,21e+01 -2,01e+01 -2,21e+01 -2,04e+01 -2,18e+01 -5,64e+01 12.000 -2,19e+01 -5,90e+01 -2,21e+01 -2,17e+01 -2,20e+01 -2,24e+01 -2,16e+01 -6,05e+01 13.000 -2,16e+01 -6,18e+01 -2,20e+01 -2,34e+01 -2,19e+01 -2,42e+01 -2,13e+01 -6,32e+01 14.000 -2,13e+01 -6,51e+01 -2,19e+01 -2,52e+01 -2,19e+01 -2,60e+01 -2,07e+01 -6,69e+01 15.000 -2,10e+01 -6,81e+01 -2,18e+01 -2,70e+01 -2,18e+01 -2,78e+01 -2,06e+01 -6,91e+01 16.000 -2,07e+01 -6,99e+01 -2,17e+01 -2,88e+01 -2,17e+01 -2,97e+01 -2,03e+01 -7,09e+01 17.000 -2,04e+01 -7,28e+01 -2,16e+01 -3,04e+01 -2,15e+01 -3,15e+01 -1,99e+01 -7,48e+01 18.000 -2,02e+01 -7,49e+01 -2,15e+01 -3,23e+01 -2,15e+01 -3,32e+01 -1,97e+01 -7,64e+01 19.000 -1,98e+01 -7,70e+01 -2,13e+01 -3,43e+01 -2,13e+01 -3,51e+01 -1,93e+01 -7,85e+01 20.000 -1,97e+01 -7,93e+01 -2,11e+01 -3,59e+01 -2,11e+01 -3,72e+01 -1,90e+01 -8,02e+01 21.000 -1,93e+01 -8,08e+01 -2,10e+01 -3,84e+01 -2,09e+01 -3,96e+01 -1,86e+01 -8,19e+01 22.000 -1,92e+01 -8,26e+01 -2,08e+01 -4,03e+01 -2,08e+01 -4,20e+01 -1,84e+01 -8,31e+01 23.000 -1,90e+01 -8,35e+01 -2,06e+01 -4,28e+01 -2,06e+01 -4,38e+01 -1,82e+01 -8,43e+01 24.000 -1,87e+01 -8,54e+01 -2,04e+01 -4,49e+01 -2,04e+01 -4,59e+01 -1,79e+01 -8,81e+01 25.000 -1,86e+01 -8,60e+01 -2,01e+01 -4,70e+01 -2,02e+01 -4,81e+01 -1,78e+01 -8,83e+01 26.000 -1,83e+01 -8,71e+01 -1,99e+01 -4,95e+01 -2,00e+01 -5,09e+01 -1,70e+01 -8,99e+01 27.000 -1,82e+01 -8,86e+01 -1,96e+01 -5,21e+01 -1,98e+01 -5,31e+01 -1,71e+01 -9,26e+01 28.000 -1,79e+01 -8,90e+01 -1,95e+01 -5,44e+01 -1,95e+01 -5,62e+01 -1,67e+01 -9,15e+01 29.000 -1,78e+01 -8,92e+01 -1,93e+01 -5,74e+01 -1,92e+01 -5,85e+01 -1,66e+01 -9,34e+01 30.000 -1,77e+01 -9,00e+01 -1,90e+01 -6,03e+01 -1,90e+01 -6,17e+01 -1,68e+01 -9,20e+01 31.000 -1,74e+01 -9,07e+01 -1,87e+01 -6,32e+01 -1,87e+01 -6,47e+01 -1,61e+01 -9,23e+01 32.000 -1,72e+01 -9,05e+01 -1,85e+01 -6,59e+01 -1,85e+01 -6,77e+01 -1,62e+01 -9,71e+01 33.000 -1,69e+01 -9,02e+01 -1,81e+01 -6,98e+01 -1,82e+01 -7,11e+01 -1,60e+01 -9,57e+01 34.000 -1,67e+01 -8,99e+01 -1,79e+01 -7,31e+01 -1,79e+01 -7,45e+01 -1,52e+01 -9,89e+01 35.000 -1,63e+01 -9,09e+01 -1,76e+01 -7,62e+01 -1,77e+01 -7,72e+01 -1,49e+01 -1,01e+02 36.000 -1,60e+01 -8,99e+01 -1,73e+01 -8,02e+01 -1,73e+01 -8,13e+01 -1,46e+01 -9,37e+01 37.000 -1,58e+01 -9,11e+01 -1,71e+01 -8,40e+01 -1,71e+01 -8,51e+01 -1,46e+01 -9,89e+01 38.000 -1,54e+01 -9,10e+01 -1,68e+01 -8,81e+01 -1,68e+01 -8,99e+01 -1,55e+01 -1,04e+02 39.000 -1,50e+01 -9,00e+01 -1,66e+01 -9,15e+01 -1,67e+01 -9,32e+01 -1,34e+01 -1,02e+02 40.000 -1,47e+01 -9,03e+01 -1,63e+01 -9,53e+01 -1,64e+01 -9,77e+01 -1,37e+01 -1,05e+02
cht3091a dc-40ghz attenuator ref. : dscht3091a6354 - 20 dec 06 4/ 8 specifications subject to change without notice route dpartementale 128, b.p.46 - 91401 orsay ced ex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 tamb = +25c vp=-5v vs=0v frequency ms11 ps11 ms12 ps12 ms21 ps21 ms22 ps22 mod pha mod pha mod pha mod pha ghz db deg db deg db deg db deg 1.000 -1,68e+01 -1,62e+01 -2,09e+00 -5,63e+00 -1,91e+00 -5,65e+00 -1,61e+01 -1,48e+01 2.000 -1,59e+01 -2,74e+01 -1,92e+00 -1,10e+01 -1,88e+00 -1,08e+01 -1,59e+01 -2,75e+01 3.000 -1,57e+01 -3,97e+01 -1,98e+00 -1,61e+01 -1,94e+00 -1,61e+01 -1,55e+01 -3,99e+01 4.000 -1,54e+01 -5,27e+01 -2,07e+00 -2,15e+01 -2,03e+00 -2,15e+01 -1,52e+01 -5,27e+01 5.000 -1,50e+01 -6,26e+01 -2,13e+00 -2,65e+01 -2,09e+00 -2,66e+01 -1,48e+01 -6,32e+01 6.000 -1,44e+01 -7,38e+01 -2,20e+00 -3,19e+01 -2,17e+00 -3,20e+01 -1,42e+01 -7,42e+01 7.000 -1,41e+01 -8,31e+01 -2,30e+00 -3,67e+01 -2,26e+00 -3,70e+01 -1,39e+01 -8,28e+01 8.000 -1,37e+01 -8,94e+01 -2,34e+00 -4,12e+01 -2,29e+00 -4,16e+01 -1,35e+01 -8,91e+01 9.000 -1,30e+01 -9,89e+01 -2,41e+00 -4,69e+01 -2,40e+00 -4,73e+01 -1,28e+01 -9,87e+01 10.000 -1,28e+01 -1,07e+02 -2,53e+00 -5,18e+01 -2,49e+00 -5,24e+01 -1,24e+01 -1,07e+02 11.000 -1,25e+01 -1,14e+02 -2,62e+00 -5,65e+01 -2,61e+00 -5,69e+01 -1,22e+01 -1,13e+02 12.000 -1,23e+01 -1,21e+02 -2,72e+00 -6,13e+01 -2,69e+00 -6,20e+01 -1,19e+01 -1,20e+02 13.000 -1,22e+01 -1,27e+02 -2,82e+00 -6,60e+01 -2,80e+00 -6,66e+01 -1,17e+01 -1,26e+02 14.000 -1,20e+01 -1,34e+02 -2,91e+00 -7,06e+01 -2,88e+00 -7,14e+01 -1,15e+01 -1,32e+02 15.000 -1,19e+01 -1,40e+02 -3,00e+00 -7,52e+01 -2,99e+00 -7,61e+01 -1,14e+01 -1,37e+02 16.000 -1,19e+01 -1,45e+02 -3,07e+00 -7,98e+01 -3,09e+00 -8,06e+01 -1,14e+01 -1,43e+02 17.000 -1,18e+01 -1,50e+02 -3,14e+00 -8,44e+01 -3,13e+00 -8,52e+01 -1,12e+01 -1,48e+02 18.000 -1,18e+01 -1,56e+02 -3,22e+00 -8,89e+01 -3,22e+00 -8,97e+01 -1,13e+01 -1,53e+02 19.000 -1,19e+01 -1,61e+02 -3,29e+00 -9,35e+01 -3,28e+00 -9,45e+01 -1,13e+01 -1,58e+02 20.000 -1,20e+01 -1,66e+02 -3,31e+00 -9,78e+01 -3,31e+00 -9,88e+01 -1,14e+01 -1,62e+02 21.000 -1,20e+01 -1,71e+02 -3,35e+00 -1,03e+02 -3,34e+00 -1,04e+02 -1,14e+01 -1,66e+02 22.000 -1,22e+01 -1,77e+02 -3,41e+00 -1,07e+02 -3,41e+00 -1,08e+02 -1,16e+01 -1,72e+02 23.000 -1,25e+01 1,78e+02 -3,41e+00 -1,12e+02 -3,43e+00 -1,13e+02 -1,19e+01 -1,76e+02 24.000 -1,28e+01 1,73e+02 -3,43e+00 -1,16e+02 -3,47e+00 -1,18e+02 -1,19e+01 1,80e+02 25.000 -1,32e+01 1,68e+02 -3,46e+00 -1,21e+02 -3,51e+00 -1,22e+02 -1,22e+01 1,75e+02 26.000 -1,37e+01 1,62e+02 -3,47e+00 -1,26e+02 -3,52e+00 -1,27e+02 -1,25e+01 1,72e+02 27.000 -1,42e+01 1,56e+02 -3,44e+00 -1,31e+02 -3,54e+00 -1,32e+02 -1,28e+01 1,67e+02 28.000 -1,49e+01 1,51e+02 -3,52e+00 -1,36e+02 -3,53e+00 -1,37e+02 -1,36e+01 1,64e+02 29.000 -1,57e+01 1,45e+02 -3,51e+00 -1,40e+02 -3,50e+00 -1,42e+02 -1,40e+01 1,60e+02 30.000 -1,66e+01 1,41e+02 -3,49e+00 -1,46e+02 -3,49e+00 -1,47e+02 -1,47e+01 1,53e+02 31.000 -1,77e+01 1,34e+02 -3,45e+00 -1,51e+02 -3,49e+00 -1,52e+02 -1,58e+01 1,50e+02 32.000 -1,92e+01 1,29e+02 -3,45e+00 -1,56e+02 -3,52e+00 -1,57e+02 -1,62e+01 1,48e+02 33.000 -2,10e+01 1,22e+02 -3,40e+00 -1,61e+02 -3,48e+00 -1,63e+02 -1,74e+01 1,43e+02 34.000 -2,29e+01 1,11e+02 -3,43e+00 -1,67e+02 -3,46e+00 -1,68e+02 -1,86e+01 1,49e+02 35.000 -2,63e+01 1,01e+02 -3,42e+00 -1,72e+02 -3,48e+00 -1,74e+02 -1,99e+01 1,51e+02 36.000 -3,12e+01 7,94e+01 -3,41e+00 -1,78e+02 -3,46e+00 -1,79e+02 -2,38e+01 1,51e+02 37.000 -3,55e+01 2,69e+01 -3,39e+00 1,77e+02 -3,47e+00 1,75e+02 -2,35e+01 1,58e+02 38.000 -3,11e+01 -3,53e+01 -3,41e+00 1,70e+02 -3,41e+00 1,68e+02 -2,30e+01 1,49e+02 39.000 -2,50e+01 -6,00e+01 -3,45e+00 1,64e+02 -3,49e+00 1,63e+02 -2,35e+01 -1,63e+02 40.000 -2,27e+01 -7,35e+01 -3,54e+00 1,58e+02 -3,55e+00 1,57e+02 -2,28e+01 -1,64e+02
dc-40ghz attenuator cht3091a ref. dscht3091a6354 - 20 dec 06 5/ 8 specifications subject to change without notice route dpartementale 128, b.p.46 - 91401 orsay ced ex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 typical results chip typical response (on wafer sij): tamb = +25c vp = 0v to -5v & vs = -5v to 0v -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 -5 -4 -3 -2 -1 0 vp control voltage ( volt ) with vs = -5 - vp insertion loss ( db ) 5 10 20 30 40 cht3091 insertion loss vs control voltages as function of frequency ( ghz ) frequency ( ghz ) -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 0 5 10 15 20 25 30 35 40 45 50 55 60 frequency ( ghz ) insertion loss ( db ) cht3091 gain control
cht3091a dc-40ghz attenuator ref. : dscht3091a6354 - 20 dec 06 6/ 8 specifications subject to change without notice route dpartementale 128, b.p.46 - 91401 orsay ced ex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 -3 0 -2 8 -2 6 -2 4 -2 2 -2 0 -1 8 -1 6 -1 4 -1 2 -1 0 -8 -6 -4 -2 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 f re q u e n c y ( g h z ) input return loss ( db ) c h t 3 0 9 1 in p u t r e tu rn l o s s - 3 0 - 2 8 - 2 6 - 2 4 - 2 2 - 2 0 - 1 8 - 1 6 - 1 4 - 1 2 - 1 0 - 8 - 6 - 4 - 2 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 f r e q u e n c y ( g h z ) output return loss ( db ) c h t 3 0 9 1 o u t p u t r e t u r n l o s s
dc-40ghz attenuator cht3091a ref. dscht3091a6354 - 20 dec 06 7/ 8 specifications subject to change without notice route dpartementale 128, b.p.46 - 91401 orsay ced ex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 chip assembly and mechanical data note : supply feed might be capacitively bypassed. 25 m m diameter gold wire is to be prefered. bonding pad positions. (chip thickness: 100m. all dimensions are in micro meters)
cht3091a dc-40ghz attenuator ref. : dscht3091a6354 - 20 dec 06 8/ 8 specifications subject to change without notice route dpartementale 128, b.p.46 - 91401 orsay ced ex - france tel.: +33 (0) 1 69 33 03 08 - fax: +33 (0) 1 69 33 03 09 ordering information chip form : cht3091a99f/00 information furnished is believed to be accurate an d 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 impli cation 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 re places all information previously supplied. united monolithic semiconductors s.a.s. products are not authorised for use as critical components in life support devices or s ystems without express written approval from united monolithic semiconductors s.a.s.
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