voltage variable absorptive attenuator 12 db, dc-2.0 ghz at-259 m/a-com inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. m/a-com makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does m/a-com assume any liability whatsoever arising out of the use or application of any product(s) or information. ? north america tel: 800.366.2266 / fax: 978.366.2266 ? europe tel: 44.1908.574.200 / fax: 44.1908.574.300 ? asia/pacific tel: 81.44.844.8296 / fax: 81.44.844.8298 visit www.macom.com for additional data sheets and product information. v4 1 features ? attenuation: 12 db at 1 ghz ? low intermodulation products ? low dc power consumption: 50 w ? single voltage control: 0 to -4 volts ? nanosecond switching speed ? temperature range: -40c to +85c ? sot-143 plastic package ? tape and reel packaging available description m/a-com?s at-259 is a gaas mmic voltage variable absorptive attenuator in a low cost sot-143 4-lead surface mount plastic package. the at-259 is ideally suited for use where attenuation fine tuning, fast switching and very low power consumption are required. typical applications include radio, cellular, gps equipment and other automatic gain/level control circuits. the at-259 is fabricated with a monolithic gaas mmic using a mature 1 micron process. the process features full chip passivation for increased performance and reliability. functional schematic 43 2 1 pin configuration pin no. function pin no. function 1 ground 3 rf2 2 v c 4 rf1 absolute maximum ratings 1 parameter absolute maximum input power +21 dbm control voltage +5v, -8.5v operating temperature -40c to +85c storage temperature -65c to +150c ordering information part number package at-259 sot 4-lead plastic package at-259tr forward tape and reel note: reference applicati on note m513 for reel size information. 1. exceeding any one or combination of these limits may cause permanent damage to this device .
voltage variable absorptive attenuator 12 db, dc-2.0 ghz at-259 m/a-com inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. m/a-com makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does m/a-com assume any liability whatsoever arising out of the use or application of any product(s) or information. ? north america tel: 800.366.2266 / fax: 978.366.2266 ? europe tel: 44.1908.574.200 / fax: 44.1908.574.300 ? asia/pacific tel: 81.44.844.8296 / fax: 81.44.844.8298 visit www.macom.com for additional data sheets and product information. v4 2 sot-143 electrical specifications: t a = 25c, z 0 = 50 ? parameter test conditions 2 frequency units min typ max insertion loss ? dc - 0.1 ghz dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz db db db db ? ? ? ? 2.9 3.0 3.2 3.4 3.1 3.2 3.5 3.8 flatness (peak to peak) 5 db attenuation 10 db attenuation 15 db attenuation dc - 2.0 ghz dc - 2.0 ghz dc - 2.0 ghz db db db ? ? ? + 0.2 + 2.3 + 7.0 + 0.4 + 2.5 + 7.5 output impedance ? ? ohms ? 50 ? vswr ? ? ratio ? 2.1:1 ? trise, tfall 10% to 90% rf, 90% to 10% rf ? ns ? 3 ? ton, toff 50% control to 90% rf, 50% control to 10% rf ? ns ? 5 ? transients in band ? mv ? 10 ? power handling linear operation absolute maximum input power ? dbm dbm ? ? ? ? 13 21 ip 2 measured relative to input power (for two-tone input power up to +5 dbm) 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? 34 47 ? ? ip 3 measured relative to input power (for two-tone input power up to +5 dbm) 0.05 ghz 0.5 - 2.0 ghz dbm dbm 18 18.5 31 3 36 3 ? ? 2. control voltage: 0 to -4 volts @ 20 a typical. 3. for levels above 6 db attenuation. for levels below 6 db, the minimum specification numbers apply.
voltage variable absorptive attenuator 12 db, dc-2.0 ghz at-259 m/a-com inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. m/a-com makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does m/a-com assume any liability whatsoever arising out of the use or application of any product(s) or information. ? north america tel: 800.366.2266 / fax: 978.366.2266 ? europe tel: 44.1908.574.200 / fax: 44.1908.574.300 ? asia/pacific tel: 81.44.844.8296 / fax: 81.44.844.8298 visit www.macom.com for additional data sheets and product information. v4 3 typical performance curves insertion loss vs. frequency attenuation vs. frequency vswr vs. frequency attenuation vs. control voltage, f = 950 mhz 1.0 1.2 1.4 1.6 1.8 2.0 0.0 0.5 1.0 1.5 2.0 0 12 5 frequency (ghz) 0 5 10 15 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 control voltage (v) 0 1 2 3 4 0.0 0.5 1.0 1.5 2.0 +25c -40c +85c frequency (ghz) 0 5 10 15 20 0.0 0.5 1.0 1.5 2.0 5 10 15 frequency (ghz)
|
