digital attenuator, 32 db, 2 - bit, ttl driver, dc - 2 ghz at20 - 0273 cr - 11 v 3.00 features n attenuation: 16 db steps to 32 db n temperature stability: 0.18 db from ? 40c to +85c typical n low dc power consumption n surface mount package n integral ttl driver n low cost/high performance n 50 ohm nominal impedance description m/a - com?s at20 - 0273 i s a gaas fet digital attenuator with a 16 db minimum step size and 32 db total attenuation. this attenuator and integral ttl d river is in a sealed ceramic 16 - lead surface mount package. the at20 - 0273 is ideally suited for use where accuracy, fast switc hing, very low power consumption and low intermodulation products are required. typical applications include dynamic range set ting in precision receiver circuits and other gain/leveling control circuits. available with enhanced performance as fully her metic version. environmentally screenable as p/n at - 273. electrical specifications : t a = 25 c 1 parameter test conditions frequency units min typ max reference insertion loss ? dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz db db db ? ? ? 1.2 1.3 1.5 1.6 1.7 1.9 attenuation accuracy 2 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 ? dc - 2.0 ghz ratio ? ? 1.4:1 trise, tfall 10% to 90% ? ns ? 50 ? ton, toff 50% control to 90/10% rf ? ns ? 150 ? transients in - band (peak - peak) ? mv ? 50 ? 1 db compression input power input power 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +20 +28 ? ? input ip3 for two - tone input power up to +5 dbm 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +38 +48 ? ? input ip2 for two - tone input power up to +5 dbm 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +44 +68 ? ? vcc ? ? v 4.5 5.0 5.5 vee ? ? v - 8.0 ? - 5.0 1. all specifications apply when operated with bias voltages of +5v for vcc and ? 5.0v for vee. 2. this attenuator is guaranteed monot onic.
digital attenuator, 32 db, 2 - bit, ttl driver, dc - 2 ghz at20 - 0273 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 3.00 2 parameter test conditions frequency units min typ max icc vcc = 4.5 to 5.5v vctl = 0 to 0.8v, or vcc ? 2.1v to vcc ? ma ? ? 2.0 iee vee = - 5.0 to - 8.0v ? ma ? ? 1.0 electrical specifications : t a = 25 c absolute maximum ratings 3 3. operation of this device above any one of these parameters may cause permanent damage. 4. standard cmos ttl interface, latch - up wil l occur if logic signal is applied prior to power supply. parameter absolute maximum max input power 0.5 ghz 0.5 - 2.0 ghz +27 dbm +34 dbm supply voltages vcc vee +5.5v - 8.5v control voltage 4 - 0.5v to vcc +0.5v operating temperature - 40c to +125c storage temperature - 65c to +150c truth table 0 = ttl low 1 = ttl high c2 c1 attenuation 0 0 reference 0 1 16 db 1 0 32 db control input functional schematic (top view) 5 rf1 gnd gnd gnd vee vcc rf2 gnd gnd gnd gnd 16 db 16 db c1 gnd orientation mark c2 pin 1 nc pin 16 nc 5. use the c1 control for a single 16 - db bit.
digital attenuator, 32 db, 2 - bit, ttl driver, dc - 2 ghz at20 - 0273 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 3.00 typical performance curves attenuation accuracy vs. frequency ref. insertion loss vs. frequency vswr vs. frequency 3 ordering information part number package at20 - 0273 cr - 11 0 1 2 3 4 5 0.0 0.5 1.0 1.5 2.0 2.5 3 frequency (ghz) loss (db) +85c +25c -55c -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 frequency (ghz) deviation from nominal atten (db) full attenuation 16 db bit 1.00 1.20 1.40 1.60 1.80 2.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 frequency (ghz) vswr 16 db state 32 db state full attenuation
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