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HMC985

Hittite Microwave Corporation
Part Number HMC985
Manufacturer Hittite Microwave Corporation
Description Gaas mmic voltage
Published Dec 6, 2011
Detailed Description www.DataSheet.co.kr HMC985 v00.0211 Gaas mmic voltage - variable attenuator, 20 - 50 GHz 0 attenuators - analog - Chi...
Datasheet PDF File HMC985 PDF File

HMC985
HMC985

Overview
www.
DataSheet.
co.
kr HMC985 v00.
0211 Gaas mmic voltage - variable attenuator, 20 - 50 GHz 0 attenuators - analog - Chip Typical Applications The HMC985 is ideal for: • Point-to-Point Radio • VSAT Radio • Test Instrumentation • Microwave Sensors • Military, ECM & Radar Features Wide Bandwidth: 20 - 50 GHz Excellent Linearity: +32 dB Input IP3 Wide Attenuation Range: 35 dB Die Size: 2.
78 x 1.
37 x 0.
1 mm General Description The HMC985 is an absorptive Voltage Variable Attenuator (VVA) which operates from 20 - 50 GHz and is ideal in designs where an analog DC control signal must be used to control RF signal levels over a 35 dB dynamic range.
It features two shunt-type attenuators which are controlled by two analog voltages, Vctrl1 and Vctrl2.
Optimum linearity performance of the attenuator is achieved by first varying Vctrl1 of the first attenuation stage from -3V to 0V with Vctrl2 fixed at -3V.
The control voltage of the second attenuation stage, Vctrl2, should then be varied from -3V to 0V with Vctrl1 fixed at 0V.
However, if the Vctrl1 and Vctrl2 pins are connected together it is possible to achieve the full analog attenuation range with only a small degradation in input IP3 performance.
Applications include AGC circuits and temperature compensation of multiple gain stages in microwave point to point and VSAT radios.
Functional Diagram Electrical Specifications, TA = +25 °C, See Test Conditions Parameter Condition 20 - 27 Insertion Loss 27 - 35 35 - 50 20 - 27 Attenuation Range 27 - 35 35 - 50 Input Return Loss Output Return Loss Input Third Order Intercept (two-tone input Power = 10 dBm Each Tone) [1] [1] VCTR2 = -3, VCTR1 = -2.
0 worst case 25 30 35 Min.
Typ.
3 3 3.
5 30 35 40 13 13 33 Max.
3.
5 4 4.
5 Units dB dB dB dB dB dB dB dB dBm 0-1 For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.
hittite.
com Application Support: Phone: 978-250-...


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