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Discussion of precise voltage measurement

Homebrew LTZ1000 reference?

mikes@flatsurface.com

Thu, Nov 19, 2009 12:14 AM

Anyone interested in working toward a reasonable cost, homebrew LTZ1000
based reference?

Since the 1000 can be had for <$50, and seem to be the best available
(other than JJ), this might be an interesting project.

The 1000 itself has great specs, most of the variability seems to come
from the circuitry around it. One could go out and buy $100 zero-tempco
resistor arrays, etc., but a more reasonably priced reference might be
built by ovenizing things. But there may be better ideas.

The Chinese thread I pointed toward a couple of weeks ago seemed to be
headed in this direction. Group buys/shared development/shared PCB
costs, etc. There could even be an opportunity to do a group
calibration of the end result.

I know there are folks here brighter than me in this matter, but I'm
willing to contribute what I can.

Anyone interested in working toward a reasonable cost, homebrew LTZ1000 based reference? Since the 1000 can be had for <$50, and seem to be the best available (other than JJ), this might be an interesting project. The 1000 itself has great specs, most of the variability seems to come from the circuitry around it. One could go out and buy $100 zero-tempco resistor arrays, etc., but a more reasonably priced reference might be built by ovenizing things. But there may be better ideas. The Chinese thread I pointed toward a couple of weeks ago seemed to be headed in this direction. Group buys/shared development/shared PCB costs, etc. There could even be an opportunity to do a group calibration of the end result. I know there are folks here brighter than me in this matter, but I'm willing to contribute what I can.

J. L. Trantham

Thu, Nov 19, 2009 3:57 AM

This has been something that is on my very back burner of something to do.
I am interested in the result but I do not know if I have any time to devote
to it.

Joe

-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On
Behalf Of Mike S
Sent: Wednesday, November 18, 2009 6:15 PM
To: volt-nuts@febo.com
Subject: [volt-nuts] Homebrew LTZ1000 reference?

Anyone interested in working toward a reasonable cost, homebrew LTZ1000
based reference?

Since the 1000 can be had for <$50, and seem to be the best available
(other than JJ), this might be an interesting project.

I know there are folks here brighter than me in this matter, but I'm
willing to contribute what I can.

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This has been something that is on my very back burner of something to do. I am interested in the result but I do not know if I have any time to devote to it. Joe -----Original Message----- From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On Behalf Of Mike S Sent: Wednesday, November 18, 2009 6:15 PM To: volt-nuts@febo.com Subject: [volt-nuts] Homebrew LTZ1000 reference? Anyone interested in working toward a reasonable cost, homebrew LTZ1000 based reference? Since the 1000 can be had for <$50, and seem to be the best available (other than JJ), this might be an interesting project. The 1000 itself has great specs, most of the variability seems to come from the circuitry around it. One could go out and buy $100 zero-tempco resistor arrays, etc., but a more reasonably priced reference might be built by ovenizing things. But there may be better ideas. The Chinese thread I pointed toward a couple of weeks ago seemed to be headed in this direction. Group buys/shared development/shared PCB costs, etc. There could even be an opportunity to do a group calibration of the end result. I know there are folks here brighter than me in this matter, but I'm willing to contribute what I can. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.