attenuators - smt 5 5 - 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 gaas mmic smt voltage-variable attenuator, dc - 8 ghz v07.1008 general description features functional diagram wide bandwidth: dc - 8 ghz low phase shift vs. attenuation 32 db attenuation range electrical speci cations, t a = +25 c, 50 ohm system typical applications this attenuator is ideal for use as a vva for dc - 8 ghz applications: ? point-to-point radio ? vsat radio the hmc346ms8g & HMC346MS8GE are absorp- tive voltage variable attenuators (vva) in 8 lead sur- face-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 con- trol 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. parameter min typical max units insertion loss dc - 8 ghz 1.5 2.5 db attenuation range dc - 8 ghz 27 32 db return loss dc - 8 ghz 5 10 db switching characteristics 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 -2 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
attenuators - smt 5 5 - 103 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 relative attenuation relative attenuation vs. control voltage @ 4 ghz insertion loss vs. temperature return loss vs. attenuation relative phase relative attenuation vs. control voltage @ 8 ghz -4 -3 -2 -1 0 012345678910 t+25c t -40c t+85c insertion loss (db) frequency (ghz) -3 -2.5 -2 -1.5 -1 -0.5 0 0 5 10 15 20 25 30 control voltage (vdc) relative attenuation (db) v2 +85c v2 +25c v2 -40c v1 +85c v1 +25c v1 -40c -30 -25 -20 -15 -10 -5 0 012345678910 min 15 db max return loss (db) frequency (ghz) 0 20 40 60 80 100 120 140 012345678910 relative phase (deg) frequency (ghz) 5 db 10 db 15 db 20 db 25 db 30 db max -3 -2.5 -2 -1.5 -1 -0.5 0 0 5 10 15 20 25 30 control voltage (vdc) relative attenuation (db) v2 +85c v2 +25c v2 -40c v1 +85c v1 +25c v1 -40c -40 -30 -20 -10 0 012345678910 attenuation (db) frequency (ghz) hmc346ms8g / 346ms8ge v07.1008 gaas mmic smt voltage-variable attenuator, dc - 8 ghz
attenuators - smt 5 5 - 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 input third order intercept vs attenuation* *two-tone input power = -8 dbm each tone, 1 mhz spacing. input second order intercept vs. attenuation* 0.25 db compression vs. attenuation 1 db compression vs. attenuation second harmonic vs. attenuation 20 30 40 50 60 70 80 012345678 0 db 3 db 6 db 10 db second harmonic (dbc) frequency (ghz) -5 0 5 10 15 20 012345678 0 db (ref) 5 db input p1db (dbm) frequency (ghz) -5 0 5 10 15 20 012345678 0 db (ref) 5 db input.25db compression (dbm) frequency (ghz) 10 20 30 40 50 60 70 012345678 0 db 3 db 6 db 10 db second order intercept point (dbm) frequency (ghz) 5 10 15 20 25 30 012345678 0 db 3 db 6 db 10 db third order intercept point (dbm) frequency (ghz) hmc346ms8g / 346ms8ge v07.1008 gaas mmic smt voltage-variable attenuator, dc - 8 ghz
attenuators - smt 5 5 - 105 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 outline drawing absolute maximum ratings rf input power +18 dbm control voltage range +1 to -5 v storage temperature -65 to +150 c operating temperature -40 to +85 c esd sensitivity (hbm) class 1a electrostatic sensitive device observe handling precautions part number package body material lead finish msl rating package marking [3] hmc346ms8g low stress injection molded plastic sn/pb solder msl1 [1] h346 xxxx HMC346MS8GE rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] h346 xxxx [1] max peak re ow temperature of 235 c [2] max peak re ow temperature of 260 c [3] 4-digit lot number xxxx package information 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. hmc346ms8g / 346ms8ge v07.1008 gaas mmic smt voltage-variable attenuator, dc - 8 ghz
attenuators - smt 5 5 - 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 pin number function description interface schematic 1, 8 rf1 rf2 this pin is dc coupled and matched to 50 ohm. blocking capacitors are required if rf line potential is not equal to 0v. 2, 7 gnd this pin must be dc grounded. 3, 6 v2, v1 control input (master). 4 i control input (slave). 5n/c not connected. pin descriptions 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.) single-line control driver hmc346ms8g / 346ms8ge v07.1008 gaas mmic smt voltage-variable attenuator, dc - 8 ghz
attenuators - smt 5 5 - 107 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 evaluation pcb the circuit board used in the nal 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. list of materials for evaluation pcb 104091 [1] item description j1 - j2 pcb mount sma rf connector j3 - j7 dc pin u1 hmc346ms8g / HMC346MS8GE pcb [2] 104089 eval board [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 hmc346ms8g / 346ms8ge v07.1008 gaas mmic smt voltage-variable attenuator, dc - 8 ghz
|
