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| HMC346MS8G / 346MS8GE v05.0607 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Typical Applications Features Wide Bandwidth: DC - 8 GHz Low Phase Shift vs. Attenuation 32 dB Attenuation Range 6 ATTENUATORS - SMT This attenuator is ideal for use as a VVA for DC - 8 GHz applications: * Point-to-Point Radio * VSAT Radio Functional Diagram General Description The HMC346MS8G & HMC346MS8GE are absorptive Voltage Variable Attenuators (VVA) in 8 lead surface-mount packages 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 point-to-point and VSAT radios. Electrical Specifications, TA = +25 C, 50 ohm system Parameter Insertion Loss Attenuation Range Return Loss Switching Characteristics 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) DC - 8 GHz DC - 8 GHz DC - 8 GHz tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) Min. Atten. Atten. >2 dB Min. Atten. Atten. >2 dB 27 5 Min Typical 1.5 32 10 2 8 +8 -2 +25 +10 Max 2.5 Units dB dB dB ns ns dBm dBm dBm dBm 6 - 102 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 HMC346MS8G / 346MS8GE v05.0607 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Insertion Loss vs. Temperature 0 Relative Attenuation 0 -5 6 ATTENUATORS - SMT 6 - 103 INSERTION LOSS (dB) ATTENUATION (dB) 7 8 9 10 -1 -10 -15 -20 -25 -30 -35 -2 -3 T+25C T -40C T+85C -4 0 1 2 3 4 5 6 FREQUENCY (GHz) -40 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) Return Loss vs. Attenuation 0 -5 RETURN LOSS (dB) -10 -15 -20 -25 -30 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (GHz) MIN 15 dB MAX Relative Attenuation vs. Control Voltage @ 4 GHz 0 -0.5 V2 -40C CONTROL VOLTAGE (Vdc) -1 V2 +25C V2 +85C -1.5 -2 -2.5 V1 +85C V1 +25C V1 -40C -3 0 5 10 15 20 25 30 RELATIVE ATTENUATION (dB) Relative Phase 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 1 2 max 25 dB 30 dB 20 dB 15 dB 10 dB 5 dB Relative Attenuation vs. Control Voltage @ 8 GHz 0 -0.5 V2 -40C CONTROL VOLTAGE (Vdc) RELATIVE PHASE (DEG) -1 V2 +25C V2 +85C -1.5 -2 -2.5 V1 +85C V1 +25C V1 -40C -3 3 4 5 6 7 8 9 10 0 5 10 15 20 25 30 FREQUENCY (GHz) RELATIVE ATTENUATION (dB) 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 HMC346MS8G / 346MS8GE v05.0607 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Input Second Order Intercept vs. Attenuation* 70 SECOND ORDER INTERCEPT POINT (dBm) Input Third Order Intercept vs Attenuation* THIRD ORDER INTERCEPT POINT (dBm) 6 ATTENUATORS - SMT 30 60 50 40 30 20 10 0 dB 3 dB 6 dB 10 dB 25 0 dB 3 dB 6 dB 10 dB 20 15 10 5 0 1 2 3 4 5 6 7 8 FREQUENCY (GHz) 0 1 2 3 4 5 6 7 8 FREQUENCY (GHz) 0.25 dB Compression vs. Attenuation 20 INPUT.25dB COMPRESSION (dBm) 1 dB Compression vs. Attenuation 20 15 0 dB (REF) 5 dB 15 INPUT P1dB (dBm) 10 10 5 5 0 0 0 dB (REF) 5 dB -5 0 1 2 3 4 5 6 7 8 FREQUENCY (GHz) -5 0 1 2 3 4 5 6 7 8 FREQUENCY (GHz) Second Harmonic vs. Attenuation 80 70 60 50 40 30 20 0 1 2 3 4 5 6 7 8 FREQUENCY (GHz) 0 dB 3 dB 6 dB 10 dB *Two-tone input power = -8 dBm each tone, 1 MHz spacing. 6 - 104 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 SECOND HARMONIC (dBc) HMC346MS8G / 346MS8GE v05.0607 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Absolute Maximum Ratings RF Input Power Control Voltage Range Storage Temperature Operating Temperature +18 dBm +1.0 to -5.0 Vdc -65 to +150 C 6 ATTENUATORS - SMT NOTES: 1. LEADFRAME MATERIAL: COPPER ALLOY 2. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE. 4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE. 5. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. -40 to +85 C ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Outline Drawing Package Information Part Number HMC346MS8G HMC346MS8GE Package Body Material Low Stress Injection Molded Plastic RoHS-compliant Low Stress Injection Molded Plastic Lead Finish Sn/Pb Solder 100% matte Sn MSL Rating MSL1 MSL1 [1] Package Marking [3] H346 XXXX H346 XXXX [2] [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 - 105 HMC346MS8G / 346MS8GE v05.0607 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Pin Descriptions 6 ATTENUATORS - SMT Pin Number 1, 8 Function RF1 RF2 Description This pin is DC coupled and matched to 50 Ohm. 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 N/C Not Connected. 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 -2.5 Volts (max. attenuation.) 6 - 106 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 HMC346MS8G / 346MS8GE v05.0607 GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz Evaluation PCB 6 ATTENUATORS - SMT List of Materials for Evaluation PCB 104091 Item J1 - J2 J3 - J7 U1 PCB [2] Description PCB Mount SMA RF Connector DC PIN HMC346MS8G / HMC346MS8GE 104089 Eval Board [1] [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 - 107 |
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