nRF52833 ADC reference external interface

[Smart.Enrg]

Hi,

For ratio-metric sensor measurement I need to do either of the following with nRF52833 SAADC module: 

1. Access internal voltage reference signal on external pin, which can then be buffered and used as sensor excitation reference. or
2. Use sensor excitation voltage as (an external) reference input for SAADC

Either way the idea is to achieve ratio-metric measurement across sensor conditioning and SAADC for best long term accuracy, linearity.

Please advise. Thanks.

[Stian Røed Hafskjold]

Hi,

Because of Christmas holidays we will have to come back to you in the first week of January. Sorry for the inconvenience.