digital attenuator, 31 db, 5 - bit, ttl driver, dc - 2 ghz at20 - 0263 cr - 12 v 3.00 features n attenuation: 1 db steps to 31 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 - 0263 is a gaas fet 5 - bit digital attenuator with a 1 db minimum step size and 31 db total attenuation. this attenuator and integral t tl driver is in a ceramic 16 - lead surface mount package. the at20 - 0263 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. available with enhanced performance as fully hermetic version. environmentally screenable as p/n at - 263. 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 ? ? ? 2.0 2.2 2.5 2.4 2.8 3.0 attenuation accuracy 2 any single bit any combination of bits dc - 1.0 ghz dc - 2.0 ghz (0.25 +3% of atten setting in db) db (0.25 +3% of atten setting in db) db or 0.4 db, whichever is greater vswr ? dc - 2.0 ghz ratio ? ? 1.6:1 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 ? ? +40 +48 ? ? input ip2 for two - tone input power up to +5 dbm 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +45 +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, 31 db, 5 - bit, ttl driver, dc - 2 ghz at20 - 0263 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 ? ? 5.0 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 control inputs c5 c4 c3 c2 c1 attenuation 0 0 0 0 0 reference 0 0 0 0 1 1 db 0 0 0 1 0 2 db 0 0 1 0 0 4 db 0 1 0 0 0 8 db 1 0 0 0 0 16 db 1 1 1 1 31 db 1 functional schematic (top view) 0 = ttl low 1 = ttl high c5 +5v -5v c4 c3 c2 rf2 gnd gnd gnd gnd 16 db 8 db 4 db 2 db 1 db gnd gnd orientation mark rf1 pin 1 c1 pin 16 gnd
digital attenuator, 31 db, 5 - bit, ttl driver, dc - 2 ghz at20 - 0263 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 - 0263 cr - 12 -1.5 -1 -0.5 0 0.5 0.0 0.5 1.0 1.5 2.0 frequency (ghz) deviation from nominal atten (db) 1,2,4,8,16 db full attenuation 1.00 1.20 1.40 1.60 1.80 2.00 0.00 0.50 1.00 1.50 2.00 frequency (ghz) vswr 4 db state 1 db state 0 1 2 3 4 5 0.0 0.5 1.0 1.5 2.0 frequency (ghz) loss (db) +85c +25c -55c
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