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attenuators - analog - s m t 1 HMC985ALP4KE v00.1115 gaas mmic voltage - variable attenuator, 10 - 40 ghz electrical specifcations, t a = +25 c, test condition vctl1 = vctl2 parameter frequency min. t yp. ma x. u nits i nsertion l oss [1] 10 - 20 g hz 3 3.5 db 20 - 30 g hz 3 4 db 30 -40 g hz 3.5 4.5 db a ttenua tion r ange 10 - 20 g hz 25 30 db 20 - 30 g hz 30 35 db 30 - 40 g hz 35 40 db input r eturn l oss 10 - 40 g hz 13 db o utput r eturn l oss 10 - 40 g hz 13 db inpu t t hird o rder in tercept (two-tone input power = 10 dbm e ach t one) [2] 33 dbm [1] vcntl1 = vcntl2 =-2.4v [2] vcntl1 = vcntl2 =-2.0v worst case functional diagram features wide bandwidth: 10 - 40 g hz e xcell ent l inear ity: +32 db input ip3 wide a ttenu ation r ange: 3 5 db n o e xternal matching 24 l ead 4x4 m m s m t pack age: 16 mm2 typical applications the HMC985ALP4KE is ideal for: ? point-to-point r adio ? v sat r adio ? t est inst rumentation ? microwave s ensors ? m ilitary, e cm & r adar general description the hmc985 a lp4ke is an absorptive voltage variable attenuator (vva) which operates from 10 - 40 ghz and is ideal in designs where an analog dc control signal must be used to control rf signal levels over a 35 db dynamic range. it features two shunt-type attenuators which are controlled by two analog voltages, vctl1 and vctl2. optimum linearity performance of the attenuator is achieved by first varying vctl1 of the first attenuation stage from -3v to 0v with vctl2 fixed at -3v. the control voltage of the second attenuation stage, vctl2, should then be varied from -3v to 0v with vctl1 fixed at 0v. i f the vctl1 and vctl2 pins are connected together it is possible to achieve the full analog attenuation range with only a small degradation in input ip3 performance. ap pl ications include agc circuits and temperature com pensation of multiple gain stages in microwave point-to-point and vsat radios. information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. for price, delivery, and to place orders: analog devices, inc., one technology way, p.o. box 9106, norwood, ma 02062-9106 phone: 781-329-4700 order online at www.analog.com application support: phone: 1-800-analog-d preliminary
attenuators - analog - s m t 2 HMC985ALP4KE v 00.1115 ga a s mmic voltage - variabl e attenuator , 10 - 40 g hz outline drawing ele c trostat ic sens i t iv e d e vic e o b ser v e h an d l i ng p re c aut i ons notes : 1. p a ck age b o dy m ater i al : lo w stress i n j e c t i on m ol d e d p last ic s i l ic a an d s i l ic on imp regnate d. 2. lea d an d groun d p a dd le m ater i al : c o pp er allo y. 3. lea d an d groun d p a dd le p lat i ng : 100% m atte t i n 4. dim ens i ons are i n i n ch es [mi ll im eters ]. 5. lea d s p a ci ng toleran c e i s non -c u m ulat iv e . 6. ch ara c ters to b e h el v et ic a m e di u m, .025 hi g h, whi te i n k, or laser m ar k lo c ate d a pp ro x. as s h o w n . 7. p a d b urr lengt h s h all b e 0.15mm m a x. p a d b urr h e i g h t s h all b e 0.05mm m a x. 8. p a ck age w ar p s h all not e xc ee d 0.05mm 9. all groun d lea d s an d groun d p a dd le m ust b e sol d ere d to pcb r f groun d. 10. re f er to hi tt i te a pp l ic at i on note f or sugges te d pcb lan d p attern . absolute maximum ratings control voltage +1 to -5v input r f power 30 db m maximum junction t emperatu re 165 c t hermal r esistanc e ( r t h ) (junction to ground paddle) 62 c/w o perating t emperatu re -40 c to +85c s torage t emperatu re -65 c to 125c es d s ensitiv ity (hbm) class1 a , passed 25 0v for price, delivery, and to place o rd ers: analog devices, inc., one techn ol ogy way, p.o. box 9106, norwood, ma 02062-9106 pho ne: 781-329-4700 o rd er on line at ww w.anal og .com application support: p ho ne: 1-800-analog-d preliminary
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