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| v00.0504 MICROWAVE CORPORATION HMC346C8 Features Wide Bandwidth: DC - 8 GHz Low Phase Shift vs. Attenuation 30 dB Attenuation Range Surface Mount Ceramic Package GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz Typical Applications The HMC346C8 is ideal for: 9 ATTENUATORS - SMT * Basestation Infrastructure * Fiber Optics & Broadband Telecom * Microwave Radio & VSAT * Military Radios, Radar, & ECM * Test Instrumentation Functional Diagram General Description The HMC346C8 is an absorptive Voltage Variable Attenuator (VVA) in a non-hermetic surfacemount ceramic package operating from DC - 8 GHz. It features an on-chip reference attenuator for use with an external op-amp to provide simple single voltage attenuation control, 0 to -3V. The device is ideal in designs where an analog DC control signal must control RF signal levels over a 30 dB amplitude range. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave radios and test instrumentation. Electrical Specifications, TA = +25 C, 50 ohm system Parameter Insertion Loss DC - 6 GHz DC - 8 GHz DC - 8 GHz DC - 8 GHz Min Typical 1.9 2.1 30 10 Max 2.9 3.1 Units dB dB dB dB Attenuation Range Return Loss Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) Input Power for 0.25 dB Compression (0.5 - 8 GHz) Min. Atten. Atten. >2 dB Input Third Order Intercept (0.5 - 8 GHz) (Two-tone Input Power = -8 dBm Each Tone) Min. Atten. Atten. >2 dB 2 8 ns ns +8 -2 +25 +10 dBm dBm dBm dBm 9 - 62 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 Order Online at www.hittite.com v00.0504 MICROWAVE CORPORATION HMC346C8 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz Relative Attenuation, Control Voltage GaAs MMIC SUB-HARMONICALLY Optimized for 4 GHz Operation GHz PUMPED MIXER 17 - 25 Insertion Loss vs. Temperature 0 -0.5 INSERTION LOSS (dB) -1 ATTENUATION (dB) -1.5 -2 -2.5 -3 -3.5 -4 -4.5 -5 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) +25C +85C -40C 0 -5 -10 -15 -20 -25 -30 -35 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) 9 ATTENUATORS - SMT 9 - 63 Return Loss vs. Attenuation 0 -5 RETURN LOSS (dB) -10 -15 -20 -25 -30 -35 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) 5dB 10dB 15dB 20dB 25dB 30dB Relative Attenuation, Control Voltage Optimized for 8 GHz Operation 0 -5 ATTENUATION (dB) -10 -15 -20 -25 -30 -35 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) Relative Attenuation vs. Control Voltage @ 4 GHz 0 CONTROL VOLTAGE (Vdc) -0.5 -1 -1.5 -2 -2.5 -3 0 5 10 15 20 25 30 RELATIVE ATTENUATION (dB) V1 +25C V2 +25C V1 +85C V2 +85C V1 -40C V2 -40C Relative Attenuation vs. Control Voltage @ 8 GHz 0 CONTROL VOLTAGE (Vdc) -0.5 -1 -1.5 -2 -2.5 -3 0 5 10 15 20 25 30 RELATIVE ATTENUATION (dB) V1 +25C V2 +25C V1 +85C V2 +85C V1 -40C V2 -40C 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 Order Online at www.hittite.com v00.0504 MICROWAVE CORPORATION HMC346C8 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz GaAs MMIC Relative Phase 140 RELATIVE PHASE (DEG) SUB-HARMONICALLY Intercept vs.MIXER 17 - 25 GHz PUMPED Attenuation* 30 Third Order Intercept Point (dBm) 25 0 dB 3 dB 10 dB 6 dB Input Third Order 9 ATTENUATORS - SMT 120 100 80 60 40 20 0 0 1 2 5dB 10dB 15dB 20dB 25dB 30dB 20 15 10 5 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) FREQUENCY (GHz) Input Second Order Intercept vs. Attenuation* 70 Second Order Intercept Point (dBm) 60 Second Harmonic vs. Attenuation 80 70 0 dB 50 40 30 20 10 0 1 2 3 4 5 6 7 8 9 10 SECOND HARMONIC (dBc) 60 50 6 dB 10 dB 0 dB 3 dB 6 dB 10 dB 40 30 20 0 1 2 3 4 5 6 7 8 FREQUENCY (GHz) 3 dB FREQUENCY (GHz) 0.25 dB Compression vs. Attenuation INPUT 0.25 dB COMPRESSION (dBm) 15 6 dB 1 dB Compression vs. Attenuation 20 18 16 input P1dB (dBm) 14 12 10 8 6 4 2 6dB 0dB 10 0 dB (REF) 5 0 -5 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) 0 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) *Two-tone input power = -8 dBm each tone. 9 - 64 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 Order Online at www.hittite.com MICROWAVE CORPORATION v00.0504 HMC346C8 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz Absolute Maximum Ratings RF Input Power Control Voltage Range Channel Temperature Thermal Resistance Storage Temperature Operating Temperature +18 dBm +1.0 to -5.0 Vdc 150 C 190 C/W -65 to +150 C -40 to +85 C 9 ATTENUATORS - SMT Outline Drawing NOTES: 1. PACKAGE MATERIAL: ALUMINA LOADED BOROSILICATE GLASS. 2. LEAD, BASE, COVER MATERIAL: KOVARTM (#7052 CORNING). 3. PLATING: ELECTROLYTIC GOLD 50 MICROINCHES MIN., OVER ELECTROLYTIC NICKEL 50 MICROINCHES MIN. 4. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 5. TOLERANCES: .005 [0.13] UNLESS OTHERWISE SPECIFIED. 6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 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 Order Online at www.hittite.com 9 - 65 v00.0504 MICROWAVE CORPORATION HMC346C8 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz Pin Descriptions Pin Number Function RF1, RF2 Description This pin is DC coupled and matched to 50 Ohms. Blocking capacitors are required if RF line potential is not equal to 0V. Interface Schematic 9 ATTENUATORS - SMT 1, 8 2, 7 GND This pin must be DC grounded. 3, 6 V2, V1 Control Input (Master). 4 I Control Input (Slave). 5 O This pin must have an external 500 Ohm resistor to ground. Single-Line Control Driver Note: 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.) 9 - 66 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 Order Online at www.hittite.com v00.0504 MICROWAVE CORPORATION HMC346C8 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz Evaluation PCB 9 ATTENUATORS - SMT The circuit board used in the final application should be generated with proper RF circuit design techniques. Signal lines at the RF ports should be 50 ohm impedance and the package ground leads and package bottom should be connected directly to the PCB RF ground plane, similar to that shown above. The evaluation circuit board shown above is available from Hittite Microwave Corporation upon request. List of Materials for Evaluation PCB 109023* Item J1 - J2 J3 - J7 U1 PCB** Description PC Mount SMA RF Connector DC PIN HMC346C8 Eval Board 102084-5 **Circuit Board Material: Rogers 4350 * Reference this number when ordering complete evaluation PCB. 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 Order Online at www.hittite.com 9 - 67 |
Price & Availability of HMC346C8
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