HMC346LC3B v05.1208 ATTENUATORS - ANALOG - SMT 5 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 ceramic 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 Specifi cations, 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 5 - 80 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 v05.1208 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz -1 -10 -2 +25C +85C -40C -4 -20 -30 -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 V1 V2 -1 -1.5 -2 -2.5 -3 -35 0 2 4 6 8 10 12 14 16 0 18 5 10 15 20 25 30 RELATIVE ATTENUATION (dB) FREQUENCY (GHz) Relative Phase vs. Attenuation Input IP3 vs. Attenuation* 30 180 5 dB 10dB 15dB 20dB 25dB 30dB Max 120 25 20 IP3 (dBm) 150 RELATIVE PHASE (deg) 6 ATTENUATORS - ANALOG - SMT 0 ATTENUATION (dB) INSERTION LOSS (dB) 0 -3 5 Relative Attenuation Insertion Loss vs. Temperature 90 15 60 10 30 5 0 0 dB 3 dB 6 dB 10 dB 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 5 - 81 HMC346LC3B v05.1208 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) 70 IP2 (dBm) 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 0 dB (REF) 6 dB 0 -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. 5 - 82 16 1 dB Compression vs. Attenuation 15 5 6 FREQUENCY (GHz) 0.25 dB Compression vs. Attenuation INPUT 0.25dB (dBm) ATTENUATORS - ANALOG - SMT 5 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 v05.1208 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz 5 RF Input Power +18 dBm Control Voltage Range +1 to -5V Storage Temperature -65 to +150 °C Operating Temperature -40 to +85 °C ESD Sensitivity (HBM) Class 1A ATTENUATORS - ANALOG - SMT Absolute Maximum Ratings 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 5 - 83 HMC346LC3B v05.1208 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz ATTENUATORS - ANALOG - SMT 5 Pin Descriptions 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.) 5 - 84 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 v05.1208 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 18 GHz 5 ATTENUATORS - ANALOG - SMT Evaluation PCB List of Materials 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 5 - 85