HMC346LP3 v02.0604 MICROWAVE CORPORATION GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz ATTENUATORS - SMT 9 Typical Applications Features The HMC346LP3 is ideal for: Wide Bandwidth: DC - 14 GHz • Basestation Infrastructure Low Phase Shift vs. Attenuation • Fiber Optics & Broadband Telecom 30 dB Attenuation Range • Microwave Radio & VSAT Simplified Voltage Control • Military Radios, Radar, & ECM 3 mm x 3 mm x 1 mm SMT Package • Test Instrumentation General Description Functional Diagram The HMC346LP3 is an absorptive Voltage Variable Attenuator (VVA) in a low cost leadless surface mount plastic package operating from DC - 14 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. This VVA is an excellent alternative to the HMC121C8. Electrical Specifications, TA = +25° C, 50 ohm system Parameter Typical Max Units 1.7 2.8 2.2 3.3 dB dB Insertion Loss DC - 10 GHz DC - 14 GHz Attenuation Range DC - 10 GHz DC - 14 GHz 27 22 30 27 dB dB Return Loss DC - 14 GHz 5 10 dB tRISE, tFALL (10/90% RF): tON, tOFF (50% CTL to 10/90% RF): 2 8 ns ns Input Power for 0.25 dB Compression (0.5 - 8 GHz) Min. Atten: Atten. >2 dB: +8 -4 dBm dBm Input Third Order Intercept (0.5 - 8 GHz) (Two-tone Input Power = -8 dBm Each Tone) Min. Atten: Atten. >2 dB: +25 +10 dBm dBm Switching Characteristics 9 - 74 Min 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 HMC346LP3 v02.0604 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz 0 0 -0.5 -5 -1 -10 -1.5 -2 -2.5 -3 +25 C -40 C +85 C -3.5 9 -15 -20 -25 -30 -35 -4 -40 0 2 4 6 8 10 12 14 16 0 2 4 FREQUENCY (GHz) 8 10 12 14 16 Relative Attenuation vs. Control Voltage @ 10 GHz 0 0 -5 V1 V2 -0.5 CONTROL VOLTAGE (Vdc) RETURN LOSS (dB) 6 FREQUENCY (GHz) Return Loss vs. Attenuation -10 -15 -20 -25 MIN 5 dB MAX -30 -35 -1 -1.5 -2 -2.5 -3 0 2 4 6 8 10 12 14 0 16 5 10 15 20 25 30 RELATIVE ATTENUATION (dB) FREQUENCY (GHz) Relative Phase Input IP3 vs. Attenuation* 180 30 160 5 dB 10 dB 15 dB 20 dB 25 dB 30 dB max 140 120 100 25 INPUT IP3 (dBm) RELATIVE PHASE (DEG) 17 - 25 GHz ATTENUATORS - SMT ATTENUATION (dB) INSERTION LOSS (dB) GaAs MMIC SUB-HARMONICALLY Relative PUMPED MIXER Attenuation Insertion Loss vs. Temperature 80 60 20 15 10 0 dB 3 dB 6 dB 10 dB 40 5 20 0 0 0 2 4 6 8 10 12 14 16 FREQUENCY (GHz) 0 2 4 6 8 10 12 14 16 FREQUENCY (GHz) *Two-tone input power = -8 dBm each tone, 1 MHz spacing. 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 - 75 HMC346LP3 v02.0604 MICROWAVE CORPORATION GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Second Harmonic vs. Attenuation, Pin = -8 dBm Input IP2 vs. Attenuation* 60 70 SECOND HARMONIC (dBc) INPUT IP2 (dBm) 80 50 40 30 0 dB 3 dB 6 dB 10 dB 20 10 60 50 40 0 dB 3 dB 6 dB 10 dB 30 20 0 2 4 6 8 10 12 14 16 0 2 4 FREQUENCY (GHz) 6 8 10 12 16 1 dB Compression vs. Attenuation 20 10 15 INPUT P1dB (dBm) 15 5 0 dB (REF) 6 dB 0 -5 10 5 0 -10 0 dB (REF) 6 dB -5 0 2 4 6 8 10 12 14 16 FREQUENCY (GHz) 0 2 4 6 8 10 12 FREQUENCY (GHz) *Two-tone input power = -8 dBm each tone, 1 MHz spacing. 9 - 76 14 FREQUENCY (GHz) 0.25 dB Compression vs. Attenuation INPUT .25dB (dBm) ATTENUATORS - SMT 9 70 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 14 16 HMC346LP3 v02.0604 MICROWAVE CORPORATION GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Absolute Maximum Ratings +18 dBm Control Voltage Range +1.0 to -5.0 Vdc Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C 9 ATTENUATORS - SMT RF Input Power Outline Drawing NOTES: 1. MATERIAL PACKAGE BODY: LOW STRESS INJECTION MOLDED PLASTIC SILICA AND SILICON IMPREGNATED. 2. LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY 3. LEAD AND GROUND PADDLE PLATING: Sn/Pb SOLDER 4. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 5. LEAD SPACING TOLERANCE IS NON-CUMULATIVE 6. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM. PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM. 7. PACKAGE WARP SHALL NOT EXCEED 0.05mm. 8. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 9. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB LAND PATTERN. 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 - 77 HMC346LP3 v02.0604 MICROWAVE CORPORATION GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Pin Descriptions ATTENUATORS - SMT 9 Pin Number Function Description 1, 3, 7, 10, 12 GND Package bottom has exposed metal paddle that must also be connected to PCB RF ground. 2, 11 RF1 RF2 This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required if the RF line potential is not equal to 0V. 4, 9, 13, 14, 15, 16 N/C This pin should be connected to PCB RF ground. 5, 8 V2, V1 Control input (master). 6 I Control input (slave). Interface Schematic Single-Line Control Driver External op-amp control circuit maintains impedance match while attenuation is varied. Input control ranges from 0 Volts (min. attenuation) to -3.0 Volts (max. attenuation.) 9 - 78 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 v02.0604 MICROWAVE CORPORATION HMC346LP3 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Evaluation PCB ATTENUATORS - SMT 9 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 Material Item Description J1 - J2 PC Mount SMA RF Connector J3 - J6 DC Pin U1 HMC346LP3 VVA PCB* 105695 Evaluation PCB * Circuit Board Material: Rogers 4350 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 - 79