HMC346MS8G / 346MS8GE

Transcription

1 Typical Applications v7.18 Features This attenuator is ideal for use as a VVA for DC - 8 GHz applications: Point-to-Point Radio VSAT Radio Functional Diagram Wide Bandwidth: DC - 8 GHz Low Phase Shift vs. Attenuation 32 db Attenuation Range 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, to -3V. The device is ideal in designs where an analog DC control signal must control RF signal levels over a 3 db amplitude range. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave point-to-point and VSAT radios. Electrical Specifications, T A = +2 C, ohm system Parameter Min Typical Max Units Insertion Loss DC - 8 GHz db Attenuation Range DC - 8 GHz db Return Loss DC - 8 GHz 1 db Switching Characteristics Input Power for.2 db Compression (. - 8 GHz) Input Third Order Intercept (. - 8 GHz) (Two-tone Input Power = -8 Each Tone) trise, tfall (1/9% RF) ton, toff (% CTL to 1/9% RF) Min. Atten. Atten. >2 db Min. Atten. Atten. >2 db ns ns - 12 One Technology Way, P.O. Box 916, Norwood, MA Phone: Order online at 2 Alpha Road, Chelmsford, MA 1824 Phone: Fax: Application Support: Phone: 1-8-ANALOG-D

2 Insertion Loss vs. Temperature v7.18 Relative Attenuation INSERTION LOSS (db) -1-3 T+2C T -4C T+8C Return Loss vs. Attenuation ATTENUATION (db) Relative Attenuation vs. Control 4 GHz RETURN LOSS (db) MIN 1 db MAX CONTROL VOLTAGE (Vdc) -. V2-4C -1 V2 +2C V2 +8C -1.. V1 +8C V1 +2C V1-4C RELATIVE ATTENUATION (db) Relative Phase RELATIVE PHASE (DEG) db 1 db 1 db max 2 db 3 db 2 db Relative Attenuation vs. Control 8 GHz CONTROL VOLTAGE (Vdc) V2 +8C V2 +2C V2-4C V1 +8C V1 +2C V1-4C RELATIVE ATTENUATION (db) One Technology Way, P.O. Box 916, Norwood, MA Phone: Order online at 2 Alpha Road, Chelmsford, MA 1824 Phone: Fax: Application Support: Phone: 1-8-ANALOG-D - 13

3 Input Third Order Intercept vs Attenuation* THIRD ORDER INTERCEPT POINT () Input Second Order Intercept vs. Attenuation*.2 db Compression vs. Attenuation 1 db Compression vs. Attenuation 2 db 3 db 6 db 1 db v7.18 SECOND ORDER INTERCEPT POINT () db 3 db 6 db 1 db INPUT.2dB COMPRESSION () 1 1 db (REF) db INPUT P1dB () 1 1 db (REF) db Second Harmonic vs. Attenuation 8 SECOND HARMONIC (dbc) db 3 db 6 db 1 db *Two-tone input power = -8 each tone, 1 MHz spacing One Technology Way, P.O. Box 916, Norwood, MA Phone: Order online at 2 Alpha Road, Chelmsford, MA 1824 Phone: Fax: Application Support: Phone: 1-8-ANALOG-D

4 Absolute Maximum Ratings v7.18 RF Input Power +18 Control Voltage Range +1 to - V Storage Temperature -6 to +1 C Operating Temperature -4 to +8 C ESD Sensitivity (HBM) Class 1A Outline Drawing ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS NOTES: 1. LEADFRAME MATERIAL: COPPER ALLOY 2. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF.1mm PER SIDE. 4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF.2mm PER SIDE.. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. Package Information Part Number Package Body Material Lead Finish MSL Rating Package Marking [3] [1] H346 HMC346MS8G Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 XXXX [2] H346 HMC346MS8GE RoHS-compliant Low Stress Injection Molded Plastic 1% matte Sn MSL1 XXXX [1] Max peak refl ow temperature of 23 C [2] Max peak refl ow temperature of 26 C [3] 4-Digit lot number XXXX One Technology Way, P.O. Box 916, Norwood, MA Phone: Order online at 2 Alpha Road, Chelmsford, MA 1824 Phone: Fax: Application Support: Phone: 1-8-ANALOG-D - 1

5 Pin Descriptions v7.18 Pin Number Function Description Interface Schematic 1, 8 RF1 RF2 This pin is DC coupled and matched to Ohm. Blocking capacitors are required if RF line potential is not equal to V. 2, 7 GND This pin must be DC grounded. 3, 6 V2, V1 Control Input (Master). 4 I Control Input (Slave). N/C Not Connected. Single-Line Control Driver External op-amp control circuit maintains impedance match while attenuation is varied. Input control ranges from Volts (min. attenuation) to. Volts (max. attenuation.) - 16 One Technology Way, P.O. Box 916, Norwood, MA Phone: Order online at 2 Alpha Road, Chelmsford, MA 1824 Phone: Fax: Application Support: Phone: 1-8-ANALOG-D

6 Evaluation PCB v7.18 List of Materials for Evaluation PCB 1491 [1] Item J1 - J2 J3 - J7 U1 PCB [2] Description PCB Mount SMA RF Connector DC PIN HMC346MS8G / HMC346MS8GE 1489 Eval Board [1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 43 The circuit board used in the fi nal application should be generated with proper RF circuit design techniques. Signal lines at the RF ports should be 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. One Technology Way, P.O. Box 916, Norwood, MA Phone: Order online at 2 Alpha Road, Chelmsford, MA 1824 Phone: Fax: Application Support: Phone: 1-8-ANALOG-D - 17