click to buy information furnished by linear integrated systems and micross components is believed to be accurate and reliable. however, no responsibility is assumed for its use; nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of linear integrated systems. features ? low ? drift ? | ?? v gs1 \ 2 ? / ? t|= ? 5v/c ? max. low ? leakage ? i g ? = ? 20pa ? typ. ? low ? noise ? e n ? = ? 10nv/ hz ? typ. ? absolute ? maximum ? ratings ?? @ ? 25c ? (unless ? otherwise ? noted) ? maximum ? temperatures ? storage ? temperature ?\ 65c ? to ? +200c ? operating ? junction ? temperature ? +150c ? maximum ? voltage ? and ? current ? for ? each ? transistor ? ? ? note ? 1 ? \ v gss ? gate ? voltage ? to ? drain ? or ? source ? 60v ? \ v dso ? drain ? to ? source ? voltage ? 60v ? \ i g ( f ) ? gate ? forward ? current ? 50ma ? maximum ? power ? dissipation ? device ? dissipation ? @ ? free ? air ? ? ? total ????????????????? 400mw ? @ ? 25c ? ? matching ? characteristics ? @ ? 25c ? unless ? otherwise ? noted symbol ? characteristics ? value ? units ? conditions ? | ? v ? gs1 \ 2 ? / ? t| ? max. ? drift ? vs. ? temperature ? 25 ? v/c ? v dg =20v, ? i d =200a ? t a = \ 55c ? to ? +125c ? | ? v ? gs1 \ 2 ? | ? max. ? offset ? voltage ? 10 ? mv ? v dg =20v, ? i d =200a ? electrical ? characteristics ? @ ? 25c ? (unless ? otherwise ? noted) symbol ? characteristics ? min. ? typ. ? max. ? units ? conditions ? bv gss ? breakdown ? voltage ? 60 ? \\? \\? v ? v ds ? = ? 0 ?????????????????? i d =1a ? bv ggo ? gate \ to \ gate ? breakdown ? 60 ? \\? \\? v ? ?????? i ? g = ? 1na ??????????????? i d = ? 0 ??????????????? i s = ? 0 ? ? y fss ? transconductance ? full ? conduction ? ? 1000 ? ? 2000 ? ? 3000 ? ? mho ? ? v dg = ? 20v ????????? v gs = ? 0v ?????? f ? = ? 1khz ? y fs ? typical ? operation ? 500 ? 700 ? 1000 ? mho ? ????? v dg = ? 20v ????????? i d = ? 200a ????? |y fs1 \ 2 ? / ? y ? fs | ? mismatch ? \\? 0.6 ? 3 ? % ?? ? i dss ? drain ? current ? full ? conduction ? ? 0.5 ? ? 2 ? ? 5 ? ? ma ? ? v dg = ? 20v ?????????????? v gs = ? 0v ? |i dss1 \ 2 ? / ? i dss | ? mismatch ? at ? full ? conduction ? \\? 1 ? 5 ? % ?? ? v gs (off) ? or ? v p ? gate ? voltage ? pinchoff ? voltage ? ? 1 ? ? 2 ? ? 4.5 ? ? v ? ? v ds = ? 20v ??????????????? i d = ? 1na ? v gs (on) ? operating ? range ? 0.5 ? \\? 4 ? v ? ?????????????? v ds =20v ????????????????? i d =200a ? ? \ i g ? gate ? current ? operating ? ? \\? ? 20 ? ? 50 ? ? pa ? ? v dg = ? 20v ?????????? i d = ? 200a ? \ i g ? high ? temperature ? \\? \\? 50 ? na ? t a = ? +125c ? \ i g ? reduced ?? v dg ? \\? 5 ? \\? pa ? v dg = ? 10v ????????? i d = ? 200a ? \ i gss ? at ? full ? conduction ? \\? \\? 100 ? pa ? v dg = ? 20v ?????????????? v ds = ? 0 ? ? y oss ? output ? conductance ? full ? conduction ? ? \\? ? \\? ? 5 ? ? mho ? ? v dg = ? 20v ?????????????? v gs = ? 0v ? y os ? operating ? \\? 0.1 ? 1 ? mho ? v dg = ?? 20v ??????????? i d = ? 200a ? |y os1 \ 2 | ? differential ? \\? 0.01 ? 0.1 ? mho ? ? cmr ? common ? mode ? rejection ? \ 20 ? log ? | ? v gs1 \ 2 / ? v ds | ? ? \\? ? 100 ? ? \\? ? db ? ? ? v ds ? = ? 10 ? to ? 20v ???????? i d =200a ? cmr ?\ 20 ? log ? | ? v gs1 \ 2 / ? v ds | ? \\? 75 ? \\? db ?? v ds ? = ? 5 ? to ? 10v ???????? i d =200a ? ? nf ? noise ? figure ? ? \\? ? \\? ? 0.5 ? ? db ? v ds = ? 20v ?????? v gs = ? 0v ??????? r g = ? 10m ? f= ? 100hz ??????????? nbw= ? 6hz ? e n ? voltage ? \\? \\? 15 ? nv/ hz ? v ds =20v ??? i d =200a ??? f=10hz ?? nbw=1hz ? ? c iss ? capacitance ? input ? ? \\? ? \\? ? 6 ? ? pf ? ? v ds = ? 20v ??????? v gs = ? 0v ??????? f= ? 1mhz ? c rss ? reverse ? transfer ? \\? \\? 2 ? pf ? c dd ? drain \ to \ drain ? \\? 0.1 ? \\? pf ? v dg = ?? 20v ??????????? i d = ? 200a ? the 2n3955 is a low noise, low dr ift, monolithic dual n-channel jfet 2n3955 monolithic dual n-channel jfet note 1 ? these ratings are limiting values above which the serviceability of any semiconductor may be impaired 2n3955 applications: ? wideband differential amps ? high input impedance amplifiers the 2n3955 family are matched jfet pairs for differential amplifiers. the 2n3955 family of general purpose jfets is characterized for low and medium frequency differential amplifiers requiring low offset voltage, drift, noi se and capacitance the 2n3955 family exhibits low capacitance - 6pf max and a spot noise figure of - 0.5db max. the part offers a superior tracking ability. the 8 pin p-dip and 8 pin soic provide ease of manufacturing, and the symm etrical pinout prevents improper orientation. (see packaging information). pdip / soic (top view) available packages: 2n3955 in pdip / soic 2n3955 available as bare die please contact micross for full package and die dimensions micross components europe tel: +44 1603 788967 email: chipcomponents@micross.com web: http://www.micross.com/distribution
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