? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 visit www.macomtech.com for addi tional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. 1 digital attenuator 32.0 db, 2-bit, ttl driver, dc-2.0 ghz rev. v9 AT-273-PIN advanced: data sheets contain information regarding a product m/a-com technology solutions is considering for development. performance is based on target specifications, simulated results, and/or prototype measurements. commitment to develop is not guaranteed. preliminary: data sheets contain information regarding a product m/a-com technology solutions has under development. performance is based on engineering tests. specifications are typical. mechanical outline has been fixed. engineering samples and/or test data may be available. commitment to produce in volume is not guaranteed. 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 ? lead-free cr-11 package ? 260c reflow compatible ? rohs* compliant description m/a-com's AT-273-PIN 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-pin 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. environmental screening is available. contact the factory for information. ordering information part number package AT-273-PIN bulk packaging note: reference application note m513 for reel size information. pin configuration pin no. function pin no. function 1 c2 9 rf1 2 gnd 10 gnd 3 c1 11 gnd 4 gnd 12 gnd 5 gnd 13 vee 6 gnd 14 vcc 7 gnd 15 nc 8 rf2 16 nc * restrictions on hazardous substanc es, european union directive 2002/95/ec. the metal bottom of the case must be connected to rf and dc ground. functional schematic 1 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 1. use the c1 control for a single 16-db bit.
? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 visit www.macomtech.com for addi tional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. 2 digital attenuator 32.0 db, 2-bit, ttl driver, dc-2.0 ghz rev. v9 AT-273-PIN advanced: data sheets contain information regarding a product m/a-com technology solutions is considering for development. performance is based on target specifications, simulated results, and/or prototype measurements. commitment to develop is not guaranteed. preliminary: data sheets contain information regarding a product m/a-com technology solutions has under development. performance is based on engineering tests. specifications are typical. mechanical outline has been fixed. engineering samples and/or test data may be available. commitment to produce in volume is not guaranteed. electrical specifications: t a = 25c 1,2 parameter frequency units min typ 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 dc - 2.0 ghz dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz vswr dc - 2.0 ghz ratio ? ? 1.6:1 trise, tfall ? ns ? 7 ? ton, toff ? ns ? 28 ? transients ? mv ? 30 ? 1 db compression 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +20 +28 ? ? input ip3 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +38 +48 ? ? input ip2 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +44 +68 ? ? 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 test conditions ? c1 bit full attenuation (32 db) full attenuation (32 db) full attenuation (32 db) full range 10% to 90% 50% cntl to 90% / 10% rf in-band (peak-to-peak) input power input power two-tone inputs up to +5 dbm two-tone inputs up to +5 dbm 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 leakage current (high) 0 to 0.8v 2.0 to 5.0v ? ? a a ? ? ? ? 1.0 1.0 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 1. all specifications apply when operated with bi as voltages of +5v for vcc and ?5.0v for vee. 2. this attenuator is guaranteed monotonic.
? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 visit www.macomtech.com for addi tional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. 3 digital attenuator 32.0 db, 2-bit, ttl driver, dc-2.0 ghz rev. v9 AT-273-PIN advanced: data sheets contain information regarding a product m/a-com technology solutions is considering for development. performance is based on target specifications, simulated results, and/or prototype measurements. commitment to develop is not guaranteed. preliminary: data sheets contain information regarding a product m/a-com technology solutions has under development. performance is based on engineering tests. specifications are typical. mechanical outline has been fixed. engineering samples and/or test data may be available. commitment to produce in volume is not guaranteed. handling procedures please observe the following precautions to avoid damage: static sensitivity gallium arsenide integrated circuits are sensitive to electrostatic discharge (esd) and can be damaged by static electric ity. proper esd control techniques should be used when handling these devices. truth table (digital attenuator) c1 c2 attenuation 0 0 loss, reference 0 1 16.0 db 1 1 32.0 db 0 = ttl low; 1 = ttl high typical performance curves attenuation accuracy vs. frequency ref. insertion loss vs. frequency 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 fre qu e n cy (g h z ) deviation from nominal atten (db) full attenuation 16 db bit vswr vs. frequency 1. 0 0 1. 2 0 1. 4 0 1. 6 0 1. 8 0 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 absolute maximum ratings 3,4 parameter absolute maximum max. input power 0.05 ghz 0.5 - 2.0 ghz +27 dbm +34 dbm v cc -0.5v v cc +7.0v v cc - v ee -0.5v v cc - v ee 14.5v vin 5 -0.5v vin v cc + 0.5v operating temperature -55c to +125c storage temperature -65c to +150c v ee -8.5v v ee +0.5v 3. exceeding any one or combination of these limits may cause permanent damage to this device. 4. m/a-com does not recommend sustained operation near these survivability limits. 5. standard cmos ttl interface, latch-up will occur if logic signal is applied prior to power supply.
? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 visit www.macomtech.com for addi tional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. 4 digital attenuator 32.0 db, 2-bit, ttl driver, dc-2.0 ghz rev. v9 AT-273-PIN advanced: data sheets contain information regarding a product m/a-com technology solutions is considering for development. performance is based on target specifications, simulated results, and/or prototype measurements. commitment to develop is not guaranteed. preliminary: data sheets contain information regarding a product m/a-com technology solutions has under development. performance is based on engineering tests. specifications are typical. mechanical outline has been fixed. engineering samples and/or test data may be available. commitment to produce in volume is not guaranteed. lead-free, cr-11 ceramic package ? ? reference application note m 538 for lead-free solder reflow recommendations.
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