HMC812LC4 v03.0614 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz Typical Applications Features The HMC812LC4 is ideal for: Wide Bandwidth: 5 - 30 GHz Excellent Linearity: +28 dBm Input IP3 Point-to-Point Radio VSAT Radio High Power Handling: +25 dBm Input P1dB Wide Attenuation Range: 30 dB Test Instrumentation Microwave Sensors 24 Lead Ceramic 4x4 mm SMT Package: 16mm Military, ECM & Radar Functional Diagram General Description The HMC812LC4 is an absorptive Voltage Variable Attenuator (VVA) which operates from 5 - 30 GHz and is ideal in designs where an analog DC control signal must be used to control RF signal levels over a 30 dB amplitude range. It features two shunt-type attenuators which are controlled by two analog vol- tages, Vctrl1 and Vctrl2. Optimum linearity perfor- mance of the attenuator is achieved by first varying Vctrl1 of the 1st attenuation stage from -3V to 0V with Vctrl2 fixed at -3V. The control voltage of the 2nd attenuation stage, Vctrl2, should then be varied from -3V to 0V, with Vctrl1 fixed at 0V. The HMC812LC4 is housed in a RoHS compliant 4x4 mm QFN lead- less ceramic package However, if the Vctrl1 and Vctrl2 pins are connected together it is possible to achieve the full analog atten- uation 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. Electrical Specifications, T = +25 C, 50 Ohm system A Parameter Min. Typ. Max. Units 5 - 16 GHz 2 dB Insertion Loss 16 - 24 GHz 3 dB 24 - 30 GHz 4 dB Attenuation Range 30 dB Input Return Loss 12 dB Output Return Loss 8 dB Input Power for 1 dB Compression (any attenuation) 25 dBm Input Third Order Intercept (Two-tone Input Power = 10 dBm Each Tone) 28 dBm 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 1 Application Support: Phone: 978-250-3343 or apps hittite.com OBSOLETE ATTENUATORS - ANALOG - SMTHMC812LC4 v03.0614 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz Attenuation vs. Frequency over Vctrl Attenuation vs. Frequency over Vctrl Vctrl1 = Variable, Vctrl2 = -3V Vctrl1 = 0V, Vctrl2 = Variable 0 0 -5 -10 -10 -20 -15 -30 -3.0 V -3.0 V -1.8 V -2.0 V -20 -1.4 V -40 -1.6 V -0.8 V -1.0 V 0.0 V 0.0 V -25 -50 2 6 10 14 18 22 26 30 2 6 10 14 18 22 26 30 FREQUENCY (GHz) FREQUENCY (GHz) Attenuation vs. Vctrl1 Attenuation vs. Vctrl2 Over Temperature 10 GHz, Vctrl2 = -3V Over Temperature 10 GHz, Vctrl1 = 0V 0 0 -5 +25 C -3 +85 C -40 C -10 -6 -15 -20 -9 -25 +25 C -12 +85 C -40 C -30 -15 -35 -3 -2.5 -2 -1.5 -1 -0.5 0 -3 -2.5 -2 -1.5 -1 -0.5 0 Vctrl1 (V) Vctrl2 (V) Attenuation vs. Pin 10 GHz Input Return Loss Vctrl1 = Variable, Vctrl2 = -3V Vctrl1 = Variable, Vctrl2 = -3V 0 0 -3 -10 -6 -9 -20 -12 -3.0 V -30 -1.6 V 0.0 V -3.0 V -0.8 V -15 -1.8 V 0.0 V -1.4 V -18 -40 0 3 6 9 12 15 18 2 6 10 14 18 22 26 30 INPUT POWER (dBm) FREQUENCY (GHz) 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 2 Application Support: Phone: 978-250-3343 or apps hittite.com OBSOLETE ATTENUATION (dB) ATTENUATION (dB) ATTENUATION (dB) RETURN LOSS (dB) ATTENUATION (dB) ATTENUATION (dB) ATTENUATORS - ANALOG - SMT