HMC346LC3B v00.1204 ATTENUATORS - SMT 9 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz Typical Applications Features The HMC346LC3B is ideal for: Wide Bandwidth: DC - 18 GHz • Test Instrumentation Low Phase Shift vs. Attenuation • Fiber Optics & Broadband Telecom 30 dB Attenuation Range • Microwave Radio & VSAT Simplified Voltage Control • Military Radios, Radar, & ECM RoHS Compliant 3 x 3 mm SMT Package Functional Diagram General Description The HMC346LC3B is an absorptive Voltage Variable Attenuator (VVA) in a leadless “Pb free” RoHS compliant SMT mount plastic package operating from DC 18 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. The HMC346LC3B allows the use of surface mount manufacturing techniques. Electrical Specifications, TA = +25° C, 50 Ohm system Parameter Insertion Loss DC - 10 GHz DC - 14 GHz DC - 18 GHz Attenuation Range DC - 12 GHz DC - 18 GHz Return Loss Max Units 1.5 2.2 2.8 2.0 2.7 3.5 dB dB dB dB dB DC - 18 GHz 10 dB Input Power for 0.25 dB Compression (0.5 - 18 GHz) Min. Atten: Atten. >2 dB: +8 -4 dBm dBm Input Third Order Intercept (0.5 - 18 GHz) (Two-tone Input Power = -8 dBm Each Tone) Min. Atten: Atten. >2 dB: +25 +10 dBm dBm 2 8 ns ns tRISE, tFALL (10/90% RF): tON, tOFF (50% CTL to 10/90% RF): 26 22 Typical 30 26 Switching Characteristics 9 - 90 Min For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC346LC3B v00.1204 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz Relative Attenuation 0 -5 -1 -10 -1.5 -2 -2.5 +25C +85C -40C -3 -3.5 9 -15 -20 -25 -30 -35 -4 -40 0 2 4 6 8 10 12 14 16 18 0 2 4 FREQUENCY (GHz) 10 12 14 16 18 Relative Attenuation vs. Control Voltage @ 10 GHz 0 0 -5 -0.5 CONTROL VOLTAGE (Vdc) RETURN LOSS (dB) 8 FREQUENCY (GHz) Return Loss vs. Attenuation -10 -15 -20 -25 MIN 5 dB MAX -30 -35 V1 -1 V2 -1.5 -2 -2.5 -3 0 2 4 6 8 10 12 14 16 18 0 5 10 FREQUENCY (GHz) 15 20 25 30 RELATIVE ATTENUATION (dB) Relative Phase vs. Attenuation Input IP3 vs. Attenuation* 30 180 160 5 dB 10dB 15dB 20dB 25dB 30dB Max 140 120 100 25 INPUT IP3 (dBm) RELATIVE PHASE (deg) 6 ATTENUATORS - SMT 0 -0.5 ATTENUATION (dB) INSERTION LOSS (dB) Insertion Loss vs. Temperature 80 60 20 15 10 40 0 dB 3 dB 6 dB 10 dB 5 20 0 0 0 2 4 6 8 10 12 14 16 18 FREQUENCY (GHz) 0 2 4 6 8 10 12 14 16 18 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: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 9 - 91 HMC346LC3B v00.1204 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz Second Harmonic vs. Attenuation, Pin = -8 dBm Input IP2 vs. Attenuation* 80 60 70 SECOND HARMONIC (dBc) INPUT IP2 (dBm) 70 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 18 0 2 4 FREQUENCY (GHz) 8 10 12 14 10 15 INPUT P1dB (dBm) 20 5 0 dB (REF) 6 dB -5 18 10 5 0 dB (REF) 6 dB 0 -10 -5 0 2 4 6 8 10 12 14 16 18 FREQUENCY (GHz) 0 2 4 6 8 10 12 14 FREQUENCY (GHz) *Two-tone input power = -8 dBm each tone, 1 MHz spacing. 9 - 92 16 1 dB Compression vs. Attenuation 15 0 6 FREQUENCY (GHz) 0.25 dB Compression vs. Attenuation INPUT .25dB (dBm) ATTENUATORS - SMT 9 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 16 18 HMC346LC3B v00.1204 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 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 ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing NOTES: 1. PACKAGE BODY MATERIAL: ALUMINA 2. LEAD AND GROUND PADDLE PLATING: GOLD FLASH OVER Ni 3. DIMENSIONS ARE IN INCHES [MILLIMETERS] 4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE 5. PACKAGE WARP SHALL NOT EXCEED 0.05mm 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: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 9 - 93 HMC346LC3B v00.1204 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz Pin Descriptions ATTENUATORS - SMT 9 Pin Number Function Description 1, 3, 7, 9 GND Package bottom has exposed metal paddle that must also be connected to PCB RF ground. 2, 8 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, 6 V2, V1 Control input (master). 5 I Control input (slave). 10, 11, 12 N/C This pin may be connected to PCB RF/DC ground. Performance will not be affected. 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 - 94 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC346LC3B v00.1204 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz Evaluation PCB ATTENUATORS - SMT 9 List of Material for Evaluation PCB 109741 [1] Item Description J1 - J2 PCB Mount SMA RF Connector J3 - J7 DC Pin U1 HMC346LC3B VVA PCB [2] 109739-1 Evaluation PCB [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350 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. For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 9 - 95