digital attenuator, 32 db, 2-bit, ttl driver dc - 2.0 ghz at-273 m/a-com division of amp incorporated q north america: tel. (800) 366-2266, fax (800) 618-8883 q asia/pacific: tel.+85 2 2111 8088, fax +85 2 2111 8087 q europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 www.macom.com amp and connecting at a higher level are trademarks. specifications subject to change without notice. v5.00 features attenuation: 16.0 db steps to 32 db low dc power consumption hermetic surface mount package integral ttl driver 50 ohm impedance temperature stability: 0.18 db from -55c to +85c typ. tape and reel packaging available descri p tion m/a-com's at-273 is a gaas fet digital attenuator with a 16.0 db minimum step size and a 32 db total attenuation range. this attenuator and integral ttl driver is in a hermetically sealed ceramic 16-lead surface mount package. the at-273 is ideally suited for use where accuracy, fast switching, very low power consumption and low intermodulation products are required. typical applications include dynamic range setting in precision receiver circuits and other gain/leveling control circuits. environ- mental screening is available. contact the factory for information. cr-11 di g ital attenuator, 32 db, 2-bit, ttl driver dc - 2.0 ghz at-273 orderin g information part number package at-273 bulk packaging AT-273-TR tape and reel 1 parameter test conditions frequency units min typical max insertion loss dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz db db db 1.6 1.7 1.9 attenuation accuracy c1 bit full attenuation (32 db) dc - 2.0 ghz dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz 3% of attenuation setting in db 3% of attenuation setting in db 3% of attenuation setting in db, -1 db 3% of attenuation setting in db, -3 db vswr full range dc - 2.0 ghz ratio 1.6:1 trise, tfall ton, toff transients 10% to 90% 50% cntl to 90%/10% rf in-band (peak to peak) ns ns mv 7 28 30 electrical s p ecifications t a = +25c 1. check with the factory for available quantities and reel size. orientation mark pin 2 0.050 (1.27) 16 places 0.250 7 equal spaces @ .050 (1.27) tol. non-cumulative 0.050 typ (1.27) 0.075 max 0.008 0.002 0.450 (11.43) (6.35) (1.91) (0.20 0.05) pin 8 pin 9 bottom view 0.015 0.003 (0.38 0.08) 16 places pin 9 0.047 (1.19) 14 places 0.096 (2.44) 0.077 (1.96)
digital attenuator, 32 db, 2-bit, ttl driver dc - 2.0 ghz at-273 m/a-com division of amp incorporated q north america: tel. (800) 366-2266, fax (800) 618-8883 q asia/pacific: tel.+85 2 2111 8088, fax +85 2 2111 8087 q europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 www.macom.com amp and connecting at a higher level are trademarks. specifications subject to change without notice. v5.00 absolute maximum ratin g s 2 pin confi g uration electrical s p ecifications t a = +25c parameter test conditions frequency units min typical max 1 db compression input power input power 0.05 ghz 0.5 - 2.0 ghz dbm dbm +20 +28 input ip 3 two-tone inputs up to +5 dbm 0.05 ghz 0.5 - 2.0 ghz dbm dbm +38 +48 input ip 2 two-tone inputs up to +5 dbm 0.05 ghz 0.5 - 2.0 ghz dbm dbm +44 +68 vcc -vee v v 4.5 -8.0 5.0 5.5 -5.0 vctl vctl logic (0) ttl logic (1) ttl v v 0.0 2.0 0.8 5.0 input leakage current (low) input lekage current (high) 0 to 0.8 v 2.0 to 5.0 v a a - 1.0 1.0 icc vcc = 4.5 to 5.5v vctl = 0 to 0.8v, or v cc -2.1 v to v cc ma 2.0 -iee vee = -5.0 to -8.0 v ma -1 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 -0.5 to vcc + 0.5v operating temperature -55c to +125c storage temperature -65c to +150c truth table c1 c2 attenuation 0 0 loss, reference 0 1 16.0 db 1 1 30.0 db pin # function pin # function 1c29rf1 2gnd10gnd 3c111gnd 4gnd12gnd 5gnd13v ee 6gnd14v cc 7 gnd 15 nc 8rf216nc 0 = ttl low; 1 = ttl high 2. operation of this device above any one of these parameters may cause perament damage.
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