Logging 100 ksps with the Arduino internal ADC

Using Arduino Storage
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The papers are included in AnalogIsrLogger20120810.zip. There are two tests of the AVR ADC.

Have you read the Analog Devices papers Unformatted write to SD - #4 by fat16lib - Storage - Arduino Forum?

They describe evaluation of ADCs.

At least read this one http://www.analog.com/static/imported-files/tutorials/MT-003.pdf.

If you want to get serious about understanding issues with ADCs, Walt Kester has many good articles.

Here is a link to his Handbook on Data Conversion http://www.analog.com/library/analogDialogue/archives/39-06/data_conversion_handbook.html. It covers both ADC and DAC issues.