Product category:
Discrete Power Devices
News Release from: Linear Integrated Systems | Subject: LSK389 series
Edited by the Electronicstalk Editorial
Team on 13 January 2006
Dual JFETs promise a perfect match
A new family of ultra-low-noise dual JFETs offers a better performing, less time consuming and cheaper solution than matching individual devices.
New from Linear Integrated Systems is the LSK389 series of 1nV N-channel monolithic dual JFETs The LSK389 series is a monolithic dual version of the recently released LSK170 single N-channel JFET
This article was originally published on Electronicstalk on 27 Jan 2005 at 8.00am (UK)
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This family of ultra-low-noise dual JFETs was specifically designed to provide users a better performing, less time consuming, and cheaper solution for obtaining tighter IDSS matching, and better thermal tracking, than matching individual JFETs.
Available packaged in surface mount, RoHS compliant versions, the LSK389 is an ideal improved functional replacement for the through-hole Toshiba 2SK389, within space limited circuits for audio and instrumentation applications.
The LSK389 incorporates three grades of IDSS - 2.6-6.5, 6.0-12 and 10-20mA - with an IDSS match of 10%, a gate threshold offset of 20mV, a voltage noise of 1nV/Hz at 1kHz, 2nV/Hz at 10Hz typical, with a gain of 22ms, and 22pF capacitance.
Great for maximising battery operated applications by providing a wide output swing, and a high signal to noise ratio as a result of the LSK389's tightly matched gate threshold voltages and low gate threshold voltages.
The uniquely linear VGS transfer function is highly desirable for producing low intermodulation in audio front-ends.
The 40V breakdown provides maximum linear headroom in high transient program content amplifiers.
The LSK389 provides a low input noise to capacitance product that has nearly zero popcorn noise.
The narrow ranges of the IDSS electrical grades combined with the superior matching performance of the LSK389's monolithic dual construction promote ease of device tolerancing in low voltage applications, as compared with matching single JFETs.
Additionally, LIS offers custom screening for users who require different ranges of IDSS, VGS or other DC parameters than found in the datasheet.
Devices are housed in surface mount SOIC-8 and through-hole TO-71 6-lead packages.
Lead-free, RoHS compliant versions are available.
"Our new LSK389 series features a unique design construction of interleaving both JFETs on the same piece of silicon that provides excellent matching and thermal tracking, as well a low noise profile having nearly zero popcorn noise", says Dr John Hall, Linear Integrated Systems founder and President.
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