HMC121 Datasheet | Hittite Microwave Corporation

Description The HMC121 chip is an absorptive voltage variable attenuator. It features an on-chip reference attenuator for use with an external op-amp to provide simple single voltage attenuation control. The device is ideal in designs where analog control signal must control RF signal levels over a 30 d B range, such as AGC circuits and in temperature pensation of multiple gain stages. Applications include military ECM and munications as well as mercial microwave radios and VSAT. See SMT packaged version HMC121G8 (hermetic). Ga As MMIC VOLTAGE-VARIABLE ATTENUATOR DC - 15 GHz SEPTEMBER 1999 Features WIDE BANDWIDTH: DC - 15 GHZ .. LOW PHASE SHIFT VS. ATTENUATION Attenuators 30 d B ATTENUATION RANGE SIMPLIFIED VOLTAGE CONTROL Guaranteed Performance, 50 ohm system, -55 to +85 deg C Parameter Insertion Loss Attenuation Range Return Loss Switching Characteristics DC - 8 GHz: DC - 15 GHz: t RISE, t FALL ( 10/90% RF): t ON, t OFF (50% CTL to 10/90% RF): Min. Atten: Atten. > 2d B: Min. Atten: Atten. > 2d B: DC - 8 GHz: DC - 15 GHz: 25 13 10 Min. Typ. 1.8 2 30 18 15 3 6 +10 -2 +25 +10 Max. 2.8 3.5 Units d B d B d B d B d B ns ns d Bm d Bm d Bm d Bm Input Power for 0.25d B p. ( 0.5 - 15 GHz) Input Third Order Intercept (two - 8 d Bm signals 0.5 - 15 GHz) 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Web Site: .hittite. 2-6 MICROWAVE CORPORATION HMC121 VOLTAGE-VARIABLE ATTENUATOR DC - 15 GHz SEPTEMBER 1999 Insertion...