# internal ADC reference to the pin on Artemis Thing Plus

**URL:** <https://community.sparkfun.com/t/internal-adc-reference-to-the-pin-on-artemis-thing-plus/44364>\
**Category:** Artemis\
**Created:** [August 21, 2022, 11:21am UTC](https://community.sparkfun.com/t/internal-adc-reference-to-the-pin-on-artemis-thing-plus/44364 "2022-08-21T11:21:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ruslan\_kh](https://avatars.discourse-cdn.com/v4/letter/r/df788c/32.png) [@ruslan\_kh](https://community.sparkfun.com/u/ruslan_kh)\
**Post date:** [August 21, 2022, 11:21am UTC](https://community.sparkfun.com/t/internal-adc-reference-to-the-pin-on-artemis-thing-plus/44364/1 "2022-08-21T11:21:08Z")

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Hi,

ADC range in Artemis Thing Plus is from 0-2V. It’s possible to route the internal ADC reference to the pin?

Thank you in advise

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**Author:** ![paulvha](https://avatars.discourse-cdn.com/v4/letter/p/65b543/32.png) [@paulvha](https://community.sparkfun.com/u/paulvha)\
**Post date:** [August 22, 2022, 9:20am UTC](https://community.sparkfun.com/t/internal-adc-reference-to-the-pin-on-artemis-thing-plus/44364/2 "2022-08-22T09:20:24Z")

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No, there is no pin that can be selected for that. The Apollo3 chip has an ADCREF pad, but most of the time only a capacitor is added to that for stability. Maybe if you add a wire to that pad it might work, but the schematic is not clear whether the pad can be accessed.