digital attenuator, 31.5 db, 6 - bit, ttl driver, dc - 2.0 ghz at20 - 0107 cr - 13 v 4.00 electrical specifications 2 : t a = +25 c f eatures n attenuation: 0.5 db steps to 31.5 db 1 n temperature stability: 0.18 db from ? 40 o c to +85 o c typ. n low dc power consumptio n n surface mount package n integral ttl driver n high intercept point n low cost/high performance description m/a - com's at 20 - 0107 is a gaas fet 6 - bit digital attenuator with a 0.5 db minimum step size and a 31.5 db total attenuation . this attenuator and integral ttl driver is in a ceramic 24 - lead surface mount package. the at 20 - 0107 is ideally suited for use where accuracy, fast speed, very low power consumption and low intermodulation pro d ucts are required. typical applications include dynamic range setting in precision receiver circuits and other gain/ leveling control circuits. available with enhanced perfor m- ance as fully hermetic version. environmentally screenable as p/n at - 107. parameter test conditions frequency units min typ . max insertion loss ? dc - 2.0 ghz db ? 3.2 3.8 attenuation accuracy 3,4 any bit or combination of bits dc - 2.0 ghz db ? ? + (. 3 + 7 % of atten.) - (. 2 + 1 % of atten.) vswr full range dc - 2.0 ghz ratio ? ? 1.8:1 trise, tfall ton, toff transients 10% to 90% 50% control to 90%/10% rf in - band (peak to peak) ? ? ? ns ns mv ? ? ? 50 150 50 ? ? ? 1 db compression 5 input power input power 50 m hz 0.5 - 2.0 ghz dbm dbm ? ? +21 +29 ? ? input ip 3 5 two tone inputs up to +5 dbm 50 mhz 0.5 - 2.0 ghz db db ? ? +35 +48 ? ? input ip 2 5 two tone inputs up to +5 dbm 50 mhz 0.5 - 2.0 ghz db db ? ? +75 +79 ? ? vcc - vee ? ? ? ? v v 4.5 - 8.0 5.0 ? 5.5 - 5.0 icc vcc = 4.5 to 5.5v ? ma ? ? 6.0 - iee - vee = - 5.0 to - 8.0v ? ma ? ? 1.0 1. above reference insertion loss. 2. all specifications apply when operated with bias voltages of +5v for v cc and ? 5.0 v to ? 8.0 v for v ee and 50 o impedance at all ports unless otherwise stated. 3. this attenuator is guaranteed monotonic. 4. for the attenuator to meet the guaranteed specifications, it is necessary to have a dc return on either rf1 or rf2. the dc return can be either a 10k o resistor, or an rf choke. 5. v ee = - 5 v for the typical numbers given.
digital attenuator, 31.5 db, 6 - bit, ttl driver, dc - 2.0 ghz at20 - 0107 specifications subject to change without notice. n north america: tel. (800) 366 - 2266 n asia/pacific: tel.+ 81 - 44 - 844 - 8296 , fax + 81 - 44 - 844 - 8298 n europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 4.00 2 absolute maximum ratings 6 parameter absolute maximum max. input power 0.05 ghz 0.5 - 2.0 ghz +27 dbm +34 dbm +vcc +5.5v - vee - 8.5v control voltage - 0.5v to v cc +0.5v operating temperature - 40c to + 12 5c storage temperature - 65c to +15 0 c 6. operation of this device above any one of these parameters may cause permanent damange. truth table c16 c8 c4 c2 c1 c0.5 attenuation 0 0 0 0 0 0 loss, reference 0 0 0 0 0 1 0.5 db 0 0 0 0 1 0 1.0 db 0 0 0 1 0 0 2.0 db 0 0 1 0 0 0 4.0 db 0 1 0 0 0 0 8.0 db 1 0 0 0 0 0 16.0 db 1 1 1 1 1 1 31.5 db 0 = ttl low; 1 = ttl high functional schematic (top view) pcb layout
digital attenuator, 31.5 db, 6 - bit, ttl driver, dc - 2.0 ghz at20 - 0107 specifications subject to change without notice. n north america: tel. (800) 366 - 2266 n asia/pacific: tel.+ 81 - 44 - 844 - 8296 , fax + 81 - 44 - 844 - 8298 n europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 4.00 typical performance curves attenuation accuracy vs. frequency insertion loss vs. frequency attenuation accuracy vs. frequency 3 rf1 vswr vs. frequency rf2 vswr vs. frequency ordering information part number package at 20 - 0107 bulk packaging at 20 - 0107tr tape and ree l (1k reel) at20 - 0107 - tb unit mounted on a test board 0 1 2 3 4 0 0.5 1 1.5 2 frequency (ghz) loss (db) +85 c -40 c +25 c -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0 0.5 1 1.5 2 frequency (ghz) deviation (db) 1 db 2 db 4 db 0.5 db -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 0 0.5 1 1.5 2 frequency (ghz) deviation (db) 31.5 db 8 db 16 db 1 1.2 1.4 1.6 1.8 2 0 0.5 1 1.5 2 frequency (ghz) deviation (db) loss & 0.5 db 2 db 1 db 4 db 8 & 16 db 1 1.2 1.4 1.6 1.8 2 0 0.5 1 1.5 2 frequency (ghz) deviation (db) loss & 0.5 db 1 & 2 db 16 db 4 db 8 db
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