AN420 Datasheet, PDF (1/16 Pages) STMicroelectronics – Occasionally the analog signal provided by external sensors require

AN420
Application note
Expanding A/D resolution of the ST6 A/D converter
1
Introduction
Occasionally the analog signal provided by external sensors require an Analog to Digital
conversion with a resolution of greater than 8 bits. In order to extract the full information for
subsequent data processing within the microcontroller a higher resolution Analog to Digital
is thus required.
The solution described in this note enables this higher resolution with the on-chip 8-bit A/D
converter of the ST62, using only an additional Operational Amplifier (OpAmp) and a few
resistors
November 2011
Doc ID 2078 Rev 2
1/15
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