Need a precision reference to make sure your measurements are on the nose? Here is a simple breakout Dolabra designed for just that purpose. It’s a ADR510 based battery powered 1V reference, with +0.35% tolerance and 70 ppm/C temperature stability.
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I would not have used the ADR510 reference in this application. The 70ppm drift is pretty bad. Better parts are the LT1461 from Linear Technology, the new MAX6070/MAX6071 parts are nice. The MAX 63XX series (e.g. MAX6325/41/50) are also interesting. But there are always trade-offs. Do always run your reference off a battery though.
MAX6070/MAX6071
* +/-0.04% Initial Accuracy
* 1.5ppm/°C (typ), 6ppm/°C (max) Temperature Drift
* 4.8µVP-P Noise (0.1Hz to 10Hz) at 2.5V
* 85dB Ripple Rejection
* Noise Filter Option
* 200mV Dropout
* 150µA Supply Current
* 10mA Source/Sink Load Current
* 6-Pin SOT23
As it happens I was just searching for a voltage reference when I came across these: (attempting a link in the face of spam moderation) – Touchstonesemi voltage-references They claim to be more stable than MAXIM but only seem to offer 2.5V output. I’ ma lookin for 2.048 and 4.096v.
Confucius say: ” man who measure PRECISION reference with ghetto multimeter is like man who uses piece of string as ruler”
Jack Burton says – “Man who calibrates his ghetto meters with precision reference is very wise”
What Jack burton calls “wisdom” I call unshakable optimism. :)
Cool ! :o)
this guys makes a really nice one of these. I got one and its pretty stable. Its obviously has it use, but is quite practical:
http://www.gellerlabs.com/FIREVOLT.htm