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| v01.0801 MICROWAVE CORPORATION HMC121G8 Features Wide Bandwidth: DC - 8 GHz Low Phase Shift vs. Attenuation 30 dB Attenuation Range Simplified Voltage Control GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Typical Applications * Base Station Infrastructure * Portable Wireless CATV & DBS 2 ATTENUATORS - SMT * MMDS & Wireless LAN * Wireless Local Loop * Fiber Optics, Military, Space & Test Equipment Functional Diagram General Description The HMC121G8 is an absorptive voltage variable attenuator provided in a surface-mount hermetic package. 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 an analog control signal must control RF signal levels over a 30 dB amplitude range, such as in AGC circuits and in temperature compensation of multiple gain stages. Electrical Specifications, TA = +25 C, 50 ohm system Parameter Insertion Loss DC - 4 GHz: DC - 8 GHz: 25 DC - 4 GHz: DC - 8 GHz: tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) Min Atten: Atten >2 dB: Min Atten: Atten >2 dB: 10 7 Min. Typ. 1.5 2 30 15 10 3 6 +10 -2 +25 +10 Max. 3.0 3.5 Units dB dB dB dB dB ns ns dBm dBm dBm dBm Attenuation Range Return Loss Switching Characteristics Input Power for 0.25 dB Compression (0.5 - 8 GHz) Input Third Order Intercept (Two-tone Input Power = -8 dBm Each Tone 2 - 20 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at sales@hittite.com v01.0801 MICROWAVE CORPORATION HMC121G8 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Insertion Loss 0 INSERTION LOSS (dB) -1 -2 -3 Relative Attenuation 0 ATTENUATION (dB) -10 -20 2 0 2 4 6 8 10 -30 -4 -5 0 2 4 6 8 10 FREQUENCY (GHz) -40 FREQUENCY (GHz) Return Loss 0 Relative Attenuation vs. Control Voltage 0 -0.5 -1 -1.5 -2 -2.5 -3 V1 V2 -10 -20 -30 0 2 4 6 8 10 FREQUENCY (GHz) CONTROL VOLTAGE RETURN LOSS (dB) 0 5 10 15 20 25 RELATIVE ATTENUATION (dB) 30 Relative Phase RELATIVE PHASE (DEG) 45 40 35 30 25 20 15 10 5 0 -5 0 2 4 6 8 10 FREQUENCY (GHz) 18 dB 12 dB 9 dB 3 dB For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at sales@hittite.com 2 - 21 ATTENUATORS - SMT MICROWAVE CORPORATION v01.0801 HMC121G8 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Input Third Order Intercept vs. Attenuation 30 THIRD ORDER INTERCEPT (dBm) Input Second Order Intercept vs. Attenuation 60 SECOND ORDER INTERCEPT (dBm) 2 ATTENUATORS - SMT 25 Reference 20 10 dB 15 3 dB 50 Reference 40 6 dB 30 3 dB 10 6 dB 5 0 0.1 1 10 FREQUENCY (GHz) 20 10 dB 10 0 0.1 1 10 FREQUENCY (GHz) 0.25 dB Compression vs. Attenuation 15 0.25 dB COMPRESSION (dBm) 1 dB Compression vs. Attenuation 20 1 dB COMPRESSION (dBm) 10 Reference 5 10 dB 0 6 dB -5 15 Reference 10 10 dB 5 6 dB 0 -10 0 0.1 1 10 FREQUENCY (GHz) 0 0.1 1 10 FREQUENCY (GHz) Second Harmonic vs. Attenuation 65 60 SECOND HARMONIC (dBc) Reference 55 50 45 10 dB 40 6 dB 35 30 3 dB 25 0 0.1 1 10 FREQUENCY (GHz) Absolute Maximum Ratings RF Input Power Control Voltage Range Storage Temperature Operating Temperature +16 dBm +1.0 to -6.0 Vdc -65 to +150 deg C -55 to +125 deg C 2 - 22 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at sales@hittite.com MICROWAVE CORPORATION v01.0801 HMC121G8 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Outline Drawing ORIENTATION TAB PIN 1 RFI GND 0.180 SQ (4.57 SQ) MAX RF2 PIN 8 1. MATERIAL: A) PACKAGE BODY - ALUMINA LOADED BOROSILI CATE GLASS B) LEADS, BASE, & COVER - ASTM F - 15 ALLOY 2. PLATING: ELECTROLYTIC GOLD 50 MICROINCHES MINIMUM. 3. DIMENSIONS ARE IN INCHES (MILLIMETERS). UNLESS OTHERWISE SPECIFIED TOL. ARE 0.005 ( 0.13). 2 ATTENUATORS - SMT 0.150 (3.81) TYP 0.050 (1.27) TYP V2 I HMC 121G8 GND V1 O 0.015 +/-0.003 (0.38 +/-0.08) 0.400 (10.16) 0.070 (1.78) MAX MAX 8 PLCS 0.005 +/-0.002 (0.13 +/-0.05) 8 PLCS 0.004 0.10 COPLANARITY 0.070 +/-0.020 (1.78 +/-0.51) 8 PLCS CASE BOTTOM IS GROUND Single-Line Control Driver 50 50 RF1 RF2 500 500 500 500 V2 I O V1 CTL +5V 1N4148 500 3.9K 500 3.9K TL321 OR EQUIVALENT -5V External op-amp control circuit maintains impedance match while attenuation is varied. Input control ranges from 0 Volts (min. attenuation) to -2.5 Volts (max. attenuation). For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at sales@hittite.com 2 - 23 |
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