digital attenuator, 50 db, 6 - bit, ttl driver, dc - 2 ghz at20 - 0106 cr - 13 v 5.00 features n attenuation: 1 db steps to 50 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 high intercept point n low cost/high performance n 50 ohm nominal impedance description m /a - com?s at20 - 0106 is a gaas fet 6 - bit digital attenuator with a 1 db minimum step size and 50 db total attenuation. this atte nuator and integral ttl driver is in a ceramic 24 - lead surface mount package. the at20 - 0106 is ideally suited for use where acc uracy, fast switching, low power consumption and low intermodulation products are required. typical applications include dynami c range setting in precision receiver circuits and other gain/leveling control circuits. available with enhanced performance a s fully hermetic version. environmentally screenable as p/n at - 106. 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 ? ? ? 3.0 3.5 4.0 3.6 4.1 4.6 attenuation accuracy 2 any single bit any combination of bits (for attenuation to 26 db) any combination of bits (for attenuation 27 to 50 db) dc - 2.0 ghz dc - 2.0 ghz dc - 1.5 ghz db db db (0.3 +4% of atten. setting) (0.4 +4% of atten. setting) (0.5 +5% of atten. setting) vswr ? 0.05 - 0.10 ghz 0.101 - 2.0 ghz ratio ratio ? ? ? ? 2.0:1 1.8:1 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 ? ? +34 +46 ? ? input ip2 for two - tone input power up to +5 dbm 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +75 +79 ? ? 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, 50 db, 6 - bit, ttl driver, dc - 2 ghz at20 - 0106 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 5.00 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 ? ? 6.0 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 c6 c5 c4 c3 c2 c1 attenuation 0 0 0 0 0 0 reference 0 0 0 0 0 1 1 db 0 0 0 0 1 0 2 db 0 0 0 1 0 0 4 db 0 0 1 0 0 0 8 db 0 1 0 0 0 0 16 db 1 0 0 0 0 0 32 db 1 1 1 1 1 1 63 db control inputs functional schematic (top view) pin 1 gnd gnd gnd c32 c16 vee (-5v to -8v) vcc (+5v) c8 gnd gnd gnd gnd gnd gnd rf1 pin 24 32 db 16 db 8 db 4 db 2 db 1 db gnd gnd gnd orientation mark gnd rf2 pin 13 c4 c2 c1 pin 12 gnd 0 = ttl low 1 = ttl high
digital attenuator, 50 db, 6 - bit, ttl driver, dc - 2 ghz at20 - 0106 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 5.00 typical performance curves 3 ordering information part number package at20 - 0106 pin cr - 13 attenuation accuracy vs. frequency insertion loss vs. frequency attenuation accuracy vs. frequency rf1 vswr vs. frequency rf2 vswr vs. frequency 0 1 2 3 4 5 0.0 0.5 1.0 1.5 2.0 frequency (ghz) insertion loss (db) +85c +25c -55c -0.60 -0.40 -0.20 0.00 0.20 0.40 0.60 0.0 0.5 1.0 1.5 2.0 frequency (ghz) deviation from nominal atten (db) 1 db 2 db 4 db 8 db -2.00 -1.00 0.00 1.00 2.00 0.0 0.5 1.0 1.5 2.0 frequency (ghz) deviation from nominal atten (db) 16 db 32 db 40 db 50 db 1 1.2 1.4 1.6 1.8 2 0.0 0.5 1.0 1.5 2.0 frequency (ghz) vswr 1 db 4 db 8 & 16 db 32 db ref loss & 2 db 1 1.2 1.4 1.6 1.8 2 0.0 0.5 1.0 1.5 2.0 frequency (ghz) vswr 1 db 2 db 8 db 16 db ref loss & 4 db 32 db
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