bay linear, inc 2418 armstrong street, livermore, ca 94550 tel: (925) 606-5950, fa x: (925) 940-9556 www.baylinear.com surface mount zero bias schottky b8250 detector diodes series pin connection ordering information package part no. sot-26 b850xk6 -x.x description the b-8250 line of zero bias schottky detector diodes by bay linear have been engineered for use in small signal (pin<-20 dbm) applications at frequencies below 2.0 ghz. the ideal applications are for rf/id and rf tags where primary (dc bias) power is not available. at bay linear, our commitment to quality components gives our customers a reliable second source of products, which are tested at a more stringent level than our competitors. manufacturing techniques assure that when two diodes are mounted into a single package they are taken from adjacent sites on the wafer. in cross referenced parts, we guarantee pin to pin compatibility. the various package configurations available provide a low cost solution to a wide variety of design problems. features ? surface mount sot-23 3 pin packages ? sot-143 packages 4 pin packages ? miniature sot-323/36 3 3 pin and 6 pin ? high detection sensitivity: up to 50mv/w at 915 mhz ? low flicker noise: -165 dbv/hz at 100hz ? low reverse leakage ? matched diodes ? high thermal conductivity for greater power bay linear inspire the linear power pin connections and package marking notes: 1. package marking provides orientation and identification 2. see ?electrical specifications? for appropriate package marking 3 1 2 4 5 6 c4z 3 1 2 4 5 6 c4z c4z
bay linear, inc 2418 armstrong street, livermore, ca 94550 tel: (925) 606-5950, fa x: (925) 940-9556 www.baylinear.com b8250 equivalent linear circuit model rs=series resistance (see table of spice parameters) cj = junction capacitance (see table of spice parameters) rj = 8.33 x 10-5nt where ib = externally applied bias current in amps is = saturation current (see table of spice parameters) t = temperature, k n = ideality factor (see table of spice parameters) sot-23/sot-143 package lead code identification (top view) single series unconnected 3 12 2 3 1 4 pair 3 12 3 12 b 8255 b 8250 b 8252 series sot-323 package lead code identification (top view) single 3 12 3 12 sot-23 package 6 lead code identification (top view) unconnected trio bridge quad 1 3 5 6 2 4 1 3 5 6 2 4 sot-23 package 6 lead code identification (top view) unconnected trio bridge quad 1 3 5 6 2 4 1 3 5 6 2 4 b 8256 b 8254 r j c j r s r j c j r s parameter units b 825x b v v 5.0 c jo pf 0.175 e g ev 0.68 i bv a 2.9 e-4 i s a 2.9 e-6 n 1.03 r s ? 26 p b (v j ) v 0.350 p t (xt1) 1.95 m 0.49 spice paramete r
bay linear, inc 2418 armstrong street, livermore, ca 94550 tel: (925) 606-5950, fa x: (925) 940-9556 www.baylinear.com b8250 absolute maximum ratings parameter symbol sot-23/143 sot-323 units peak inverse voltage p iv 2.0 2.0 v junction temperature t j 150 150 c storage temperature t stg -65 to 150 -65 to 150 c operating temperature t np -65 to 150 -65 to 150 c thermal resistance[2] jc 500 150 c/w dc electrical specifications (t c = 25 c, single diode) part no. package marking configuration maximum forward voltage vf (mv) typical capacitance ct (pf) 8250 8251 8252 8253 8254 8255 8256 c0 c1 c2 c3 c4 c5 c6 single single series pair[2,3] series pair[2,3] bridge quad unconnected pair[2,3] unconnected trio 150 250 0.30 test conditions i f =0.1 ma if=1.0 ma v f =-0.5v to -1.0v f=1 mhz dc electrical specifications, tc = +25c, diode pairs part number maximum forward voltage difference ? vf (mv) maximum capacitance difference ? ct (pf) 8252 8253 15 -0.5 test conditions i f = 0.1ma v f = -0.5v to -1.0 v f = 1 mhz notes: 1. operation in excess of any one of these conditions may result in permanent damage to the device 2. tc = +25c, where tc is defined to be the temperature at the package pins where contact is made to the circuit board
bay linear, inc 2418 armstrong street, livermore, ca 94550 tel: (925) 606-5950, fa x: (925) 940-9556 www.baylinear.com b8250 graph 4: +25c output voltage vs. temperature. temperature (c) 010203040 50 60 70 80 90 100 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 output voltage (mv) frequency = 2.45 ghz p in = -40 dbm r l = 100 k ? measurements made using a fr4 microstrip circuit. graph 3: +25c expanded output voltage vs. input power. see figure 2. power in (dbm) 30 10 1 0.3 -50 -40 -30 voltage out (mv) 915 mhz r l = 100 k ? diodes tested in fixed-tuned fr4 microstrip circuits. graph 1: typical forward current vs. forward voltage v f - forward voltage (v) i f ? forward current (ma) 100 10 1 0.1 0.01 00.2 0.8 0.6 0.4 1.0 1.2 1.4 1.6 1.8 graph 2: +25c output voltage vs. input power at zero bias power in (dbm) voltage out (mv) 10000 1000 100 10 1 0.1 -50 -40 -30 -20 -10 0 915 mhz r l = 100 k ? diodes tested in fixed-tuned fr4 microstrip circuits.
bay linear, inc 2418 armstrong street, livermore, ca 94550 tel: (925) 606-5950, fa x: (925) 940-9556 www.baylinear.com advance information - these data sheets contain descriptions of products that are in development. the specifications are based on the engineering ca lculations, computer simulations and/ or initial prototype evaluation. preliminary information - these data sheets contain minimum and maxi mum specifications that are based on the initial device characterizations. these lim its are subject to change upon the completion of the full characterization over the specif ied temperature and supply voltage ranges. the application circuit examples are only to explain the repres entative applications of the de vices and are not intended to gua rantee any circuit design or permit any industrial property ri ght to other rights to execute. bay linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the da ta book. typical parameters can and do vary in different applications. customer?s technical experts must validate all operating parameters including ? typical? for each customer applic ation. life support and nuclear policy bay linear products are not authorized for and should not be us ed within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, sp ace equipment, submarine, or nuc lear facility applications wi thout the specific written consent of bay linear president.
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