HMC346LP3 / 346LP3E v03.0705 ATTENUATORS - SMT 6 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Typical Applications Features The HMC346LP3 / HMC346LP3E 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 Functional Diagram General Description The HMC346LP3 & HMC346LP3E are pabsorptive Voltage Variable Attenuators (VVA) in low cost leadless surface mount plastic packages 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 DC - 14 GHz 5 Return Loss 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 6 - 96 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 HMC346LP3 / 346LP3E v03.0705 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Relative Attenuation 0 -5 -1 -10 -1.5 -2 -2.5 +25 C -40 C +85 C -3 -3.5 6 -15 -20 -25 -30 -35 -4 -40 0 2 4 6 8 10 12 14 16 0 2 4 FREQUENCY (GHz) 0 -5 -0.5 CONTROL VOLTAGE (Vdc) RETURN LOSS (dB) 0 -10 -15 -20 MIN 5 dB MAX -30 -35 10 12 14 16 V1 V2 -1 -1.5 -2 -2.5 -3 0 2 4 6 8 10 12 14 16 0 5 10 15 20 25 30 RELATIVE ATTENUATION (dB) FREQUENCY (GHz) Relative Phase Input IP3 vs. Attenuation* 30 180 160 5 dB 10 dB 15 dB 20 dB 25 dB 30 dB max 140 120 100 25 INPUT IP3 (dBm) RELATIVE PHASE (DEG) 8 Relative Attenuation vs. Control Voltage @ 10 GHz Return Loss vs. Attenuation -25 6 FREQUENCY (GHz) ATTENUATORS - SMT 0 -0.5 ATTENUATION (dB) INSERTION LOSS (dB) 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: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 6 - 97 HMC346LP3 / 346LP3E v03.0705 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 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 0 2 4 FREQUENCY (GHz) 8 10 12 10 15 INPUT P1dB (dBm) 20 0 dB (REF) 6 dB 0 -5 16 10 5 0 dB (REF) 6 dB 0 -10 -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. 6 - 98 14 1 dB Compression vs. Attenuation 15 5 6 FREQUENCY (GHz) 0.25 dB Compression vs. Attenuation INPUT .25dB (dBm) ATTENUATORS - SMT 6 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 14 16 HMC346LP3 / 346LP3E v03.0705 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 6 ATTENUATORS - SMT RF Input Power ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing NOTES: 1. LEADFRAME MATERIAL: COPPER ALLOY 2. DIMENSIONS ARE IN INCHES [MILLIMETERS] 3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE 4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM. PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM. 5. PACKAGE WARP SHALL NOT EXCEED 0.05mm. 6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED LAND PATTERN. Package Information Part Number Package Body Material Lead Finish MSL Rating HMC346LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 HMC346LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 Package Marking [3] [1] 346 XXXX [2] 346 XXXX [1] Max peak reflow temperature of 235 °C [2] Max peak reflow temperature of 260 °C [3] 4-Digit lot number XXXX 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 6 - 99 HMC346LP3 / 346LP3E v03.0705 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Pin Descriptions ATTENUATORS - SMT 6 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.) 6 - 100 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 HMC346LP3 / 346LP3E v03.0705 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 14 GHz Evaluation PCB ATTENUATORS - SMT 6 List of Materials for Evaluation PCB 105709 [1] Item Description J1 - J2 PCB Mount SMA RF Connector J3 - J6 DC Pin U1 HMC346LP3 / HMC346LP3E VVA PCB [2] 105695 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 6 - 101