Matched Low Noise JFETS from TI JFE2140

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57sputnik

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Jul 8, 2010
Messages
146
FYI...

The JFE2140 is a Burr-Brown™ matched-pair discrete JFET built using Texas Instruments' modern, high performance, analog bipolar process. The JFE2140 features performance not previously available in older discrete JFET technologies. The JFE2140 offers excellent noise performance across all current ranges, where the quiescent current can be set by the user from 50 μA to 20 mA. When biased at 5 mA, the device yields 0.9 nV/√Hz of input referred noise, giving ultra-low noise performance withextremely high input impedance (> 1 TΩ). In addition, the matching between JFETs is tested to ±4 mV, ensuring low offset and high CMRR performance for differential pair configurations. The JFE2140 also features integrated diodes connected to separate clamp nodes to provide protection without the addition of high leakage, nonlinear external diodes.

Product page: https://www.ti.com/product/JFE2140

Data Sheet: https://www.ti.com/lit/ds/symlink/jfe2140.pdf

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Bo Deadly

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Dec 22, 2015
Messages
2,958
Location
New Jersey, USA
Wow. Can that transconductance value be right? Price isn't too bad either. Someone definitely will be designing mics around this part.
 

MicUlli

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Joined
Mar 18, 2022
Messages
20
Location
Germany
Yes, this part is very promising. I like the very low gate leakage current and therefore very low current noise. And the transconductance is impressively high. It is indeed very well suited for mic input stages (y)(y):)
 

Rusan

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Joined
Aug 18, 2020
Messages
89
Location
U.S.A.
Wow, that's some crazy high Yfs/Gm, like a LSK170/LSK389 on steroids. For those of us in the US and Canada, Mouser Electronics and Digi-Key have the JFE150 in stock, and the JFE2140 is supposed to arrive in a couple of weeks. I have to make an order in the next couple of days anyway, and there'll be a JFE150 or two in it. I can't wait to check 'em out. Thanks for the heads-up, Sputnik!
 

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