Low-noise JFET for high-performance applications
Linear Systems has announced the re-release of the low-noise, low-cost LS844 series dual JFET with immediate large-scale availability and large-volume pricing. The LS844 is a low-noise Junction Field Effect Transistor (JFET) ideal for precision, high-end audio, sensor and discrete operational amplifier applications.
The re-released LS844 is the latest evolution of a classic dual JFET developed and introduced by Linear Systems over 20 years ago. The company says it has refined the part’s design and fabrication processes to improve its low noise, matching and Common Mode Rejection Ratio qualities while retaining the linearity and other characteristics sought by audio and other circuit designers.
It features a unique design construction of interleaving both JFETs on the same piece of silicon to provide excellent matching and thermal tracking, as well as a low-noise profile having nearly zero popcorn noise and lower intermodulation distortion.
“The release of this high-performance dual JFET at a low price enables design-ins for high-volume production,” says Linear Systems President Tim McCune. “Applications ranging from microphones to sensor inputs based on the LS844 will have vastly better signal clarity than circuits based on other options at this price point.”
The LS844, Low Noise, Monolithic Dual, N-Channel JFET provides designers with a better-performing solution for obtaining tighter IDSS matching and better thermal tracking than using individual JFETs or non-monolithic dual JFETs. The part is an ideal combination of high transconductance, low noise (2.5nV/vHz typical at f = 1kHz) and very low input capacitance (3pF typical CISS).
In quantities of 1,000 pieces, the LS844 in the SOT-23 6L package is $1.19 each.
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