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. micross components ltd, united kingdom, te l: +44 1603 788967, fax: +44 1603788920, email: chipcomponents@micross.com web: www.micross.com/d istribution.aspx features ? direct ? replacement ? for ? siliconix ? 2n4118a ? low ? power ? i dss <90 ? a ? minimum ? circuit ? loading ? i gss <1 ? pa ? absolute ? maximum ? ratings ?? @ ? 25c ? (unless ? otherwise ? noted) ? maximum ? temperatures ? storage ? temperature ?\ 65c ? to ? +175c ? operating ? junction ? temperature ?\ 55c ? to ? +150c ? maximum ? power ? dissipation ? continuous ? power ? dissipation ?? 300mw ? maximum ? current gate ? current ? (note ? 1) ? 50ma ? maximum ? voltages ? gate ? to ? drain ? or ? gate ? to ? source ? (note ? 2) ?\ 40v ? ?? ? ls4118a ? electrical ? characteristics ? @ ? 25c ? (unless ? otherwise ? noted) symbol ? characteristic ? min ? typ. ? max ? units ? conditions ? bv gss ? gate ? to ? source ? breakdown ? voltage ?\ 40 ? \\? \\? v ? i g ? = ?\ 1a, ??? v ds ? = ? 0v ? v gs ( off ) ? gate ? to ? source ? cutoff ? voltage ?\ 1 ? \\? \ 3 ? v ? ?????????????????? v ds ? = ? 10v, ??? i d ? = ? 1na ? i dss ? gate ? to ? source ? saturation ? current ? 0.08 ? \\? 0.24 ? ma ? v ds ? = ? 10v, ??? v gs ? = ? 0v ? i gss ? gate ? leakage ? current ? \\? \\? \ 1 ? pa ? v gs ? = ?\ 20v, ?? v ds ? = ? 0v ? \\? \\? \ 2.5 ? v gs ? = ?\ 20v, ?? v ds ? = ? 0v, ?? 150c ? g fs ? forward ? transconductance(note ? 3) ? 80 ? \\? 250 ? mho ? v ds ? = ? 10v, ??? v gs ? = ? 0v, ??? f ? = ? 1khz ? ? g os ? output ? conductance ? \\? \\? 5 ? c iss ? input ? capacitance ? \\? \\? 3 ?? pf ? ? v ds ? = ? 10v, ??? v gs ? = ? 0v, ??? f ? = ? 1mhz ? c rss ? reverse ? transfer ? capacitance ? \\? \\? 1.5 ? ?????? ? ?????? ? ? notes ? 1 ? . ? absolute ? maximum ? ratings ? are ? limiting ? values ? above ? which ? ls4118a ? serviceability ? may ? be ? impaired. ?? 2. ?? due ? to ? symmetrical ? geometry, ? these ? units ? may ? be ? operated ? with ? source ? and ? drain ? leads ? interchanged ? 3. ? this ? parameter ? is ? measured ? during ? a ? 2ms ? interval ? 100ms ? after ? power ? is ? applied. ?? (not ? a ? jedec ? condition.) ? the ls4118a is an ultra-high in put impedance n-channel jfet ls4118a n-channel jfet linear s y stems re p laces discontinued siliconix 2n4118 a micross components europe tel: +44 1603 788967 email: chipcomponents@micross.com web: http://www.micross.com/distribution available packages: ls4118a in to-92 ls4118a in bare die. please contact micross for full package and die dimensions ls4118a benefits: ? insignificant signal loss / error voltage with high-impedance source ? low power consumption (battery) ? maximum signal output, low noise ? hi g h sensitivit y to low-level si g nals the ls4118a provides ultra-high input impedance. the device is specified with a 1-pa limit and typically operates at 0.2 pa. the part is ideal for use as a high- im peda n ce se n s i t iv e fr o n t - e n d a m p lifi e r. ls4118a applications: ? high-impedance transducer ? smoke detector input ? infrared detector amplifier ? precision test equipment to-92 (bottom view)
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