Ultra Low Noise JFETs from Texas Instruments

[tomchr]

I see a low-noise test & measurement amplifier in my future. Thanks for making this available.

Mike - should the 0.545 pV/rtHz be 545 pV/rtHz (0.545 nV/rtHz)?

Tom

 

[MikeHartshorne]

Tom-
Yes! Thanks, I'll go back and fix it.
Mike

 

[jackinnj]

There seems to be an inconsistency in the data illustrated by graphs Figures 6-2 and 6-3.

 

[stinius]

There seems to be an inconsistency in the data illustrated by graphs Figures 6-2 and 6-3.

Are you sure?
In my opinion it seems like 6-3 fits in perfectly under 6-2. Ofcourse in a different scale.

Stein

 

[jackinnj]

Compare the IDS at Vgs = -0.5V @VDS of 5V and 10V

 

[stinius]

Yes, I see what you mean 🙂

 

[MikeHartshorne]

Yes, thanks stinius and jackinnj for clarifying. I added two graphs because I believe this JFET would be a great solution for very low power, low noise applications. In order to get resolution for the lower IDS currents I had to split to 2 graphs. You can achieve noise < 3 nV/rthz for only 100 uA current consumption!

Regards,
Mike

 

[MikeHartshorne]

On closer review, I see that there is a difference in ID currents for the two graphs, Fig. 6-3 is incorrect (VGS is 100 mV higher than it is supposed to be). I'll be revising ASAP - in the meantime, please let me know if you find anything else.

Thanks,
Mike

 

[jackinnj]

Yupp, on examination, I thought you were running it from -0.6V to -1.0V.

I was gonna throw it into my model-maker and noticed the discrepancy.

 

[MikeHartshorne]

Thanks for that catch.

We do have models on the website for spice-based simulators and TI-TINA:
JFE150 data sheet, product information and support | TI.com

The clamp diodes are also included in the models online, although, they have almost no impact to performance until they become forward-biased.

Regards,
Mike

 

[wayne]

Always happy to welcome a new low noise fet with thorough documentation. Thanks TI.

 

[EUVL]

Would you be kind rnough to provide a model in Spice ?


Patrick

 

[johnc124]

There is a PSpice model available for download on the product folder:

JFE150 data sheet, product information and support | TI.com

It should be compatible with other Spice-based simulators as well.

 

[kn0ppers]

I see it is not a preview part but marked as active, so we can also expect availability through authorised distributors in the near future?

 

[johnc124]

Yep. Distributor stocking might take a few days after we officially release the product, but it should be there soon.

 

[Mark Johnson]

Good because the TI Store has a hopelessly intractable wedgie in its under pants.

 

[tomchr]

Good because the TI Store has a hopelessly intractable wedgie in its under pants.

LOL. TI works in mysterious ways, Mark. 🙂

FWIW, I was able to get all the way to the payment page with QTY = 5 of the JFE150DCKR in my cart. I didn't pay as I have no immediate need for these. I also didn't try ordering them as samples (for the same reason). This via Safari on my Mac.

Maybe try a different browser and/or clearing the browser cache (assuming you haven't already).

The TI Store now remembers my GST (sales tax) number and phone number correctly. Yay! TI!

Tom

 

[johnc124]

I'll feed that back to the team and see if they can remove said wedgie.

 

[wayne]

The sales side giving the tech side wedgies, just like grade school.

 

[peranders]

Good because the TI Store has a hopelessly intractable wedgie in its under pants.

Not often I don't have a clue of what you are talking about and Google hasn't got any translation either.