# I bought adpd144ri I need analog output need solution

**URL:** <https://forum.digikey.com/t/i-bought-adpd144ri-i-need-analog-output-need-solution/60264>\
**Category:** Q&A\
**Created:** [September 16, 2025, 11:39am UTC](https://forum.digikey.com/t/i-bought-adpd144ri-i-need-analog-output-need-solution/60264 "2025-09-16T11:39:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kalis100](https://avatars.discourse-cdn.com/v4/letter/k/c68b51/32.png) [@kalis100](https://forum.digikey.com/u/kalis100)\
**Post date:** [September 16, 2025, 11:39am UTC](https://forum.digikey.com/t/i-bought-adpd144ri-i-need-analog-output-need-solution/60264/1 "2025-09-16T11:39:00Z")

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------Question for [EVAL-ADPD144RIZ-SF([https://www.digikey.com/en/products/detail/analog-devices-inc/EVAL-ADPD144RIZ-SF/10107139](https://www.digikey.com/en/products/detail/analog-devices-inc/EVAL-ADPD144RIZ-SF/10107139)) Please Put your question below

------hi

I realized that the kit I bought has a digital output

and I need a analog output .

obviously , the kit contains an analog output before a/d .

my question is , can I connect to analog output on the kit itself.

if not, do you have a d/a kit that connects directly to the kit I bought .

thank you

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**Author:** ![APDahlen](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/apdahlen/32/40191_2.png) [@APDahlen](https://forum.digikey.com/u/APDahlen)\
**Post date:** [September 16, 2025, 12:23pm UTC](https://forum.digikey.com/t/i-bought-adpd144ri-i-need-analog-output-need-solution/60264/2 "2025-09-16T12:23:28Z")

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> [@kalis100](#):
>
> EVAL-ADPD144RIZ-SF

Hello @kalis100,

The ADPD144RI features an I2C interface.

You could add a DAC after the microcontroller. Better yet, find a way to keep the system in the digital domain.

 ![Wire diagram for the ADPD144RI](https://global.discourse-cdn.com/digikey/original/3X/5/e/5ea98576f07bed6c214b564ed349ac5aab467b76.png)

This link may provide additional useful information:

> **[Track your blood oxygen levels with ADPD144RI and ATmega328P | EmbeddedWiki](https://embeddedwiki.com/articles/template38-with-oximeter-2-click/oximeter-2-click-arduino-uno-rev3-necto-atmega328p)**
>
> PPG optical sensor solution for photoplethysmography detection of blood oxygenation based on the Oximeter 2 Click and Arduino UNO Rev3 targeting ATmega328P

Best wishes,

APDahlen

P.S. Many microcontrollers include a DAC. For example, the [Arduino Nano R4](https://www.digikey.com/en/products/detail/arduino/ABX00143/26766495) has a 12-bit DAC.