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 ? low ? leakage ? i g ? = ? 10pa ? typ. ? low ? noise ? e n ? = ? 8nv/ hz ? typ. ? low ? offset ? voltage ? | ? v ? gs1 \ 2 |= ? 2mv ? typ. ? absolute ? maximum ? ratings ? @ ? 25c ? (unless ? otherwise ? noted) ? maximum ? temperatures ? storage ? temperature ?\ 65c ? to ? +150c ? 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 ? @ ? +125c ? ? matching ? characteristics ? @ ? 25c ? unless ? otherwise ? noted symbol ? characteristics ? value ? units ? conditions ? | ? v ? gs1 \ 2 ? / ? t| ? max. ? drift ? vs. ? temperature ? 5 ? v/c ? v dg =20v, ? i d =200a ? t a = \ 55c ? to ? +125c ? | ? v ? gs1 \ 2 ? | ? max. ? offset ? voltage ? 5 ? 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 ? 60 ? \\? v ? v ds ? = ? 0 ?????????????????? i d =1na ? bv ggo ? gate \ to \ gate ? breakdown ? 60 ? \\? \\? v ? ?????? i ? g = ? 1na ??????????????? i d = ? 0 ??????????????? i s = ? 0 ? ? y fss ? transconductance ? full ? conduction ? ? 1000 ? ? \\? ? 4000 ? ? mho ? ? v dg = ? 20v ????????? v gs = ? 0v ?????? f ? = ? 1khz ? y fs ? typical ? operation ? 500 ? \\? 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 max. ? gate ? current ? operating ? ? \\? ? 10 ? ? 50 ? ? pa ? ? v dg = ? 20v ? i d = ? 200a ? \ i g max. ? high ? temperature ? \\? \\? 50 ? na ? t a = ? +125c ? \ i g max. ? reduced ? v dg ? \\? 5 ? \\? pa ? v dg ? = ? 10v ? i d = ? 200a ? \ i gss max. ? at ? full ? conduction ? \\? \\? 100 ? pa ? v dg = ? 20v ? , ? v ds =0 ? ? y oss ? output ? conductance ? full ? conduction ? ? \\? ? \\? ? 10 ? ? 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 ? \ 20 ? log ? | ? v ? gs1 \ 2 / ? v ? ds | ? \\? 75 ? \\? ? 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 ? \\? \\? 10 ? nv/ hz ? v ds =20v ??? i d =200a ?? f=1khz ? nbw=1hz ? \\? \\? 15 ? v ds =20v ??? i d =200a ?? f=10hz ? nbw=1hz ? ? c iss ? capacitance ? input ? ? \\? ? 4 ? 10 ?? ? pf ? ? ? v ds = ? 20v, ??? i d =200a ??? c rss ? reverse ? transfer ? \\? 1.2 ? 5 ? c dd ? drain \ to \ drain ? \\? 0.1 ? \\? ls840 monolithic dual n-channel jfet linear s y stems ultra low leaka g e low drift monolithic dual jfet ls840 applications: ? wideband differential amps ? high-speed,temp-compensated single- ended input amps ? high-speed comparators ? impedance converters and vibrations detectors. the ls840 is a high-performance monolithic dual jfet featuring extremely lo w noise, tight offset voltage and low drift over temperat ure specifications, and is targeted for use in a wide range of precision instrumentation applications . the ls840 features a 25- mv offset and 20-v/c drift. the hermetically sealed to-71 & to-78 packages are well suited for military and harsh environment applications. (see packaging information). available packages: ls840 / ls840 in to-78 & to-71 ls840 / ls840 available as bare die please contact micross for full p acka g e and die dimensions note 1 ? these ratings are limiting values above which the serviceability of any semiconductor may be impaired tel: +44 1603 788967 email: chipcomponents@micross.com web: http://www.micross.com/distribution to-71 & to-78 (top view)
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