digital attenuator, 31.5 db, 6-bit, ttl driver dc - 2.0 ghz at20-0107 north america: tel. (800) 366-2266, fax (800) 618-8883 asia/pacific: tel.+81-44-844-8296, fax +81-44-844-8298 europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 specifications subject to change without notice. visit www.macom.com for additional data sheets and product information. v 3.00 features ? attenuation: 0.5 db steps to 31.5 db 1 ? temperature stability: 0.18 db from ?40oc to +85oc typ. ? low dc power consumption ? surface m ount package ? integral ttl driver ? high intercept point ? low cost/high performance description m/a-com's at20-0107 is a gaas fet 6-bit digital attenuator with a 0.5 db minimum step size and a 31.5 db total attenuation. this at- tenuator and integral ttl driver is in a ceramic 24-lead surface mount package. the at20-0107 is ideally suited for use where accuracy, fast speed, very low power consumption and low inter- modulation products are required. typical applications include dy- namic 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-107. electrical specifications 3 t a = +25c parameter test conditions frequency units min typical max insertion loss ? ? ? dc - 0.5 ghz dc - 1.0 ghz dc - 2.0 ghz db db db ? ? ? 2.5 2.9 3.2 3.0 3.4 3.8 attenuation accuracy 4,5 any bit or combination of bits dc - 2.0 ghz db ? ? +(.3 +7% of atten.) -(.2 +1% of atten.) vswr full range dc - 2.0 ghz ratio ? ? 1.8:1 trise, tfall ton, toff 10% to 90% 50% control to 90%/10% rf ns ns ? ? 50 150 ? ? 3. all specifications apply when operated with bias voltages of +5v for v cc and ?5.0 v to ?8.0 v for v ee and 50 ? impedance at all ports unless otherwise stated. 4. this attenuator is guaranteed monotonic. 5. for the attenuator to meet the guaranteed specifications, it is nec- essary to have a dc return on either rf1 or rf2. the dc return can be either a 10k ? resistor, or an rf choke. 6. v ee = -5 v for the typical numbers given. ordering information part number package at20-0107 AT20-0107-TR at20-0107-tb bulk packaging tape and reel 2 unit mounted on a test board 2. check with the factory for available quantities and reel size. cr-13 1. above reference insertion loss.
digital attenuator, 31.5 db, 6-bit, ttl driver dc - 2.0 ghz at20-0107 electrical specifications t a = +25c parameter test conditions frequency units min typical max input ip 3 6 two-tone inputs up to +5 dbm 50 mhz 0.5-2.0 ghz db db ? ? +35 +48 ? ? input ip 2 6 two-tone inputs up to +5 dbm 50 mhz 0.5-2.0 ghz db db ? ? +75 +79 ? ? vcc -vee ? ? ? ? v v 4.5 -8.0 5.0 ? 5.5 -5.0 icc vcc = 4.5 to 5.5 v ma ? ? 6.0 -iee -vee = -5.0 to ?8.0 v ma ? ? 1.0 1 db compression 6 input power input power 0.05 ghz 0.5 - 2.0 ghz dbm dbm ? ? +75 +79 ? ? absolute maximum ratings 7 parameter absolute maximum max. input power 0.05 ghz 0.5 - 2.0 ghz +27 dbm +34 dbm +vcc +5.5v -vee -8.5v control voltage -0.5v to v cc +0.5v operating temperature -40c to +125c storage temperature -65c to +150c 7. operation of this device above any one of these parameters may cause permanent damange. truth table c16 c8 c4 c2 c1 c0.5 attenuation 0 0 0 0 0 0 loss, reference 0 0 0 0 0 1 0.5 db 0 0 0 0 1 0 1.0 db 0 0 0 1 0 0 2.0 db 0 0 1 0 0 0 4.0 db 0 1 0 0 0 0 8.0 db 1 0 0 0 0 0 16.0 db 1 1 1 1 1 1 31.5 db 0 = ttl low; 1 = ttl high functional schematic (top view) north america: tel. (800) 366-2266, fax (800) 618-8883 asia/pacific: tel.+81-44-844-8296, fax +81-44-844-8298 europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 specifications subject to change without notice. visit www.macom.com for additional data sheets and product information. v 3.00
digital attenuator, 31.5 db, 6-bit, ttl driver dc - 2.0 ghz at20-0107 typical performance pcb layout north america: tel. (800) 366-2266, fax (800) 618-8883 asia/pacific: tel.+81-44-844-8296, fax +81-44-844-8298 europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 specifications subject to change without notice. visit www.macom.com for additional data sheets and product information. v 3.00 insertion loss vs frequency 0 1 2 3 4 00.511.52 frequency (ghz) +85 c -40 c +25 c attenuation accuracy vs. frequency -0.6 -0.4 -0.2 0 0.2 0.4 0.6 00.511.52 frequency (ghz) 1 db 2 db 4 db .5 db attenuation accuracy vs. frequency -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 0 0.5 1 1.5 2 frequency (ghz) 31.5 db 8 db 16 db rf1 vswr vs. frequency 1 1.2 1.4 1.6 1.8 2 00.511.52 frequency (ghz) loss & .5 db 2 db 1db 4 db 8 & 16 db rf2 vswr vs. frequency 1 1.2 1.4 1.6 1.8 2 00.511.52 frequency (ghz) loss & .5 db 1&2db 16 db 4 db 8
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