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datalogger for sub milli volt range

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datalogger for sub milli volt range

Postby croc » Wed Sep 10, 2008 6:21 pm

Hi am am looking for a data logger that will measure voltages down in the .01-.03 mV range, Can you recommend a model, I have gone through the spec on a number of your products and I don't see anything, but maybe I'm not reading your specs correctly?

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no replies?

Postby croc » Thu Sep 11, 2008 7:20 pm

Just to give more details......

I am currently using the adc16 product to measure total system current, I would like to measure chip current on at least 5 chip rails, using a .05ohm resistor gives me as low as .65uV on one of the chip rails that I need to measure in one of the test modes. Can someone offer a suggestion as to what datalogger will read as low as this?

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Postby picojohn » Mon Sep 15, 2008 10:49 am

Hello croc,

You may wish to consider the ADC-24 http://www.picotech.com/precision-data-acquisition.html which is capable of resolving down to the level that you require.

Regards
John
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Postby croc » Mon Sep 15, 2008 7:32 pm

Thanks John,

Just to clarify, to get the resolution of a data logger, do you take the bit resolution, get the decimal value and then divide that into the voltage range?

so for the ADC24 using the 39mv range it would be
.078/16777215 = voltage resolution per bit


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Postby picojohn » Thu Sep 18, 2008 2:43 pm

Hi croc,

For the ADC-24, please refer to section 4.4 of the user guide for the noise-free resolution data http://www.picotech.com/document/pdf/adc20044.pdf

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