HMC346C8_08

HMC346C8 v02.1008 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz 5 ATTENUATORS - SMT Typical Applications The HMC346C8 is ideal for: • Basestation Infrastructure • Fiber Optics & Broadband Telecom • Microwave Radio & VSAT • Military Radios, Radar, & ECM • Test Instrumentation Features Wide Bandwidth: DC - 8 GHz Low Phase Shift vs. Attenuation 30 dB Attenuation Range Surface Mount Ceramic Package Functional Diagram General Description The HMC346C8 is an absorptive Voltage Variable Attenuator (VVA) in a non-hermetic surface-mount 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 Specifi cations, TA = +25° C, 50 ohm system Parameter Insertion Loss 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) Input Third Order Intercept (0.5 - 8 GHz) (Two-tone Input Power = -8 dBm Each Tone) Min. Atten. Atten. >2 dB Min. Atten. Atten. >2 dB DC - 6 GHz DC - 8 GHz DC - 8 GHz DC - 8 GHz Min Typical 1.9 2.1 30 10 2 8 +8 -2 +25 +10 Max 2.9 3.1 Units dB dB dB dB ns ns dBm dBm dBm dBm 5 - 78 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 HMC346C8 v02.1008 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz Insertion Loss vs. Temperature 0 Relative Attenuation, Control Voltage Optimized for 4 GHz Operation 0 -5 5 ATTENUATORS - SMT 5 - 79 INSERTION LOSS (dB) -1 ATTENUATION (dB) -10 -15 -20 -25 -30 -5 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) -35 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) -2 +25C +85C -40C -3 -4 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: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC346C8 v02.1008 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz 5 ATTENUATORS - SMT Relative Phase 140 120 RELATIVE PHASE (DEG) 100 80 60 40 5dB 10dB 15dB 20dB 25dB 30dB Input Third Order Intercept vs. Attenuation* 30 25 0 dB 3 dB 10 dB 6 dB IP3 (dBm) 20 15 10 20 0 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) 5 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) Input Second Order Intercept vs. Attenuation* 70 60 50 IP2 (dBm) 40 30 20 10 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) Second Harmonic vs. Attenuation 80 70 0 dB 60 50 40 30 20 0 1 2 3 4 5 6 7 8 FREQUENCY (GHz) 6 dB 3 dB 10 dB 0 dB 3 dB 6 dB 10 dB 0.25 dB Compression vs. Attenuation INPUT 0.25 dB COMPRESSION (dBm) 15 1 dB Compression vs. Attenuation 20 SECOND HARMONIC (dBc) P1dB (dBm) 10 16 12 5 6 dB 0 dB (REF) 6dB 0dB 8 0 4 -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. 5 - 80 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 HMC346C8 v02.1008 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 ESD Sensitivity (HBM) +18 dBm +1.0 to -5V 150 °C 190 °C/W -65 to +150 °C -40 to +85 °C Class 1A 5 ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing NOTES: 1. PACKAGE MATERIAL: ALUMINA LOADED BOROSILICATE GLASS. 2. LEAD, BASE, COVER MATERIAL: KOVAR™ (#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: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 5 - 81 ATTENUATORS - SMT HMC346C8 v02.1008 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz 5 ATTENUATORS - SMT Pin Descriptions Pin Number 1, 8 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 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.) 5 - 82 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 HMC346C8 v02.1008 GaAs MMIC SMT VOLTAGEVARIABLE ATTENUATOR, DC - 8 GHz Evaluation PCB 5 ATTENUATORS - SMT List of Materials for Evaluation PCB 109023 [1] Item J1 - J2 J3 - J7 U1 PCB [2] Description PCB Mount SMA RF Connector DC PIN HMC346C8 Eval Board 102084-5 [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 - 83