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| CHT3091RCF DC-40GHz Attenuator GaAs Monolithic Microwave IC in SMD leadless package Description The monolithic microwave IC (MMIC) in the package is a variable DC-40GHz attenuator. It is designed for a wide range of applications, from military to commercial communication systems. The circuit is manufactured with a MESFET process, 0.7m gate length, via holes through the substrate and air bridges. It is supplied in a new SMD leadless chip carrier. Main Features Broad band performance: DC-40GHz Minimum attenuation [S21] : 4dB ( VS = 0V; VP = -5V ) Maximum attenuation [S21] : 20dB ( VS = -5V; VP = 0V ) Minimum input 1dB compression point (P-1dB) : 14dBm SMD leadless package Dimensions: 5.08 x 5.08 x 0.97 mm3 SMD Package Dimensions not to scale; not all details shown; dimensions are in millimeters [inches] 1.02 [0.04] 2.46 [0.10] 5.08 [0.20] 0.46 [0.02] 5 6 7 EXPOSED GROUND PAD CONNECT TO RF GROUND PLANE UMS CHT3091 PIN 1 Index 5.08 [0.20] PIN Function 1 2 3 4 Vs NC Vp RF out 4 8 2.46 [0.10] 3 0.97 [0.038] PIN 5 6 7 8 Function NC NC NC RF in 2 0.91 [0.036] 1 "Please note that PIN 1 is located in the lower left corner of the package (front-side view) for all SMD-type packages from United Monolithic Semiconductors. It is indicated by a triangle on the package lid. Starting with PIN 1 the other pads are numbered counter-clockwise (front-side view). ATTENTION: The dot on the backside of the package (i.e. side with metallic pads) is just for fabrication purposes and does NOT indicate the location of PIN Ref. : DSCHT3091RCF1257 - 14-Sept-01- 1/3 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 0.86 [0.034] 0.46 [0.02] CHT3091RCF Typical Bias Conditions for an ambient Temperature of +25C Symbol Vs Vp Pin No. 1 3 VS control voltage VP control voltage Parameter DC-40GHz Attenuator Values -5 to 0 0 to -5 Unit V V All other pins are not used for this device. Footprint Suggested PCB Footprint for CHT3091RCF not to scale; dimensions are in millimeters [inches] 4.93 [0.194] 1.02 [0.040] 0.46 [0.018] 1.02 [0.040] 2.03 [0.080] 0.88 [0.035] 3.91 [0.154] SMD mounting procedure The SMD leadless package has been designed for high volume surface mount PCB assembly process. The dimensions and footprint required for the PCB (motherboard) are given in the drawings above. For the mounting process standard techniques involving solder paste and a suitable reflow process can be used. For further details, see application note AN0005. Ref. : DSCHT3091RCF1257 - 14-Sept-012/3 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 0.86 [0.034] 0.46 [0.02] DC-40GHz Attenuator CHT3091RCF Ordering Information SMD leadless package form : CHT3091RCF/24 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. : DSCHT3091RCF1257 - 14-Sept-013/3 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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