[Test-Equipment] Simple DC Voltage Standard?

[Howie]

Texas Instruments makes a  1.25 voltage reference .

Mouser part number 595-ref3312AIDBZT

The catalog says VI,which I take to mean input voltage Is 1.8/7.5,although 
in the data sheet it says max voltage is 5.5.

 So it`ll run on a couple of AA or AA batts for a long time as the output 
current is rated at a max of 5 Ma!.

This would be ideal for an instrument test as the output current prob would 
NOT screw up a meter if you happened to,(like me ,ocassionaly), try to test 
a voltage in the ohms position,as the current is prob not enough to hurt the 
meter!


(geez I said so much good things about this chip I think Ill get 
one!HI,HI!.)


----- Original Message ----- 
From: "Robert Nickels" <ranickel at comcast.net>
To: <test-equipment at mailman.qth.net>
Sent: Monday, February 28, 2011 11:10 PM
Subject: Re: [Test-Equipment] Simple DC Voltage Standard?


> If 1.024 volts will do, the National  LM4140  0.1% precision voltage
> reference might be worth a look:
>
> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=LM4140CCM-1.0-ND
>
> 73, Bob W9RAN
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