voltage variable attenuator 824 - 960 mhz at65 - 0009 sot - 25 v 1.00 electrical specifications : t a = 25 c, z 0 = 50 w parameter test conditions units min. typ. max. insertion loss v b = 0v db ? 1.7 2.1 vswr ratio ? 1.7 2.2 attenuation flatness vs. frequency 0 - 10 db 0 - 20 db 0 - 30 db db db db ? ? ? 0.5 0.5 1.0 1.3 1.3 2.5 switching speed 50% control to 90%/10% rf sec ? 5.0 7.0 input ip3 two tones 900 mhz, 905 mhz, +5 dbm vb = 0v db ? 40 ? input ip2 two tones 900 mhz, 905 mhz, +5 dbm v b = 0v db ? 34 ? attenuation v b = 3.7v db 25 28 ? f eatures n 25 db attenuation range n high ip3 n excellent linearity performance n surface mount sot - 25 package n low cost/high performance n 50 ohm nominal impedance description m/a - com?s at65 - 0009 is an integrated assembly contai n- ing two pin diodes and a passive glass quadrature hybrid. this device is packaged in a 5 leaded sot plastic surface mount package. the diodes are biased to +3.5v for max i- mum attenuation using the suggested bias circuit. the at65 - 0009 is ideally suited for gsm communication appl i- cations requiring variable attenuation in the 824 to 960 mhz bandwidth.
voltage variable attenuator, 824 - 960 mhz at65 - 0009 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 1.00 2 recommended pcb configuration pin configuration absolute maximum ratings 3 3. operation of this device above any one of these parameters may cause permanent damage. parameter absolute maximum max input power +27 dbm operating voltage +5 v operating temperature - 40c to +85c storage temperature - 65c to +125c pin # function 1 rfin v b 2 gnd 3 rfout v b 4 gnd 5 gnd functional diagram and bias circuitry part value purpose c1 390 pf dc block c2 390 pf dc block c3 390 pf by - pass c4 390 pf by - pass l1 180 nh rf choke l2 180 nh rf choke r1 10 kohm current limiting c5 5 1.5 pf rf tune c6 5 1.5 pf rf tune 4. all external circuitry parts are readily available, low cost surface mount components (.060 in. x .030 in or .080 in x .050 in.). 5. see application note ma - c - 05010008a for external tuning capacitor values to suit specific communication bandwidths . external circuitry parts 4 ordering information part number package at65 - 0009 bulk packaging at65 - 0009tr tape and reel (1k reel) at65 - 0009 - tb units mounted on test board 1. circuit material = fr - 4, tetra ii, 0.031 inches thick. 2. line width = 0.025 inches, line spacing = 0.0056 inches. gnd rf in rf out c1 c2 v b l2 l1 c3 c4 gnd gnd r1 pin 1 pin 3 c6 c5
voltage variable attenuator, 824 - 960 mhz at65 - 0009 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 1.00 typical performance curves loss vs. frequency @ +85c no tuning cap loss vs. frequency @ - 40c no tuning cap loss vs. frequency @ +25c no tuning cap attenuation vs. voltage with 1.5 pf tuning cap @ +85c attenuation vs. voltage with 1.5 pf tuning cap @ - 40c attenuation vs. voltage with 1.5 pf tuning cap @ +25c 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 volts attenuation 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 0.0 1.0 2.0 3.0 4.0 volts attenuation 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 0.0 1.0 2.0 3.0 4.0 volts attenuation 1.00 1.20 1.40 1.60 1.80 2.00 820 840 860 880 900 920 940 960 frequency (mhz) loss (db) 1.00 1.20 1.40 1.60 1.80 2.00 820 840 860 880 900 920 940 960 frequency (mhz) loss (db) 1.00 1.20 1.40 1.60 1.80 2.00 820 840 860 880 900 920 940 960 frequency (mhz) loss (db)
voltage variable attenuator, 824 - 960 mhz at65 - 0009 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 1.00 typical performance curves attenuation vs. freq. with 1.5 pf tuning cap @ - 40c input vswr vs. freq. with 1.5 pf tuning cap @ - 40c - 5.00 10.00 15.00 20.00 25.00 30.00 35.00 820 840 860 880 900 920 940 960 frequency attenuation 1.0 2.0 3.0 3.2 attenuation vs. freq. with 1.5 pf tuning cap @ +85c - 5.00 10.00 15.00 20.00 25.00 30.00 35.00 820 840 860 880 900 920 940 960 frequency attenuation 1.0 2.0 3.0 3.7 attenuation vs. freq. with 1.5 pf tuning cap @ +25c - 5.00 10.00 15.00 20.00 25.00 30.00 35.00 820 840 860 880 900 920 940 960 frequency (mhz) attenuation 1v 2v 3v 3.85v 1 1.5 2 2.5 820 855 890 925 960 frequency vswr 0v 1v 2v 3v and 3.2v input vswr vs. freq. with 1.5 pf tuning cap @ +85c 1 1.5 2 2.5 820 855 890 925 960 frequency vswr 0v 1v 2v 3v 3.7v input vswr vs. freq. with 1.5 pf tuning cap @ +25c 1 1.5 2 2.5 820 855 890 925 960 frequency vswr 0v 1v 2v 3v 3.2v
|
