It is expected the ALS (Ambient Light Sensor) VD6283 to have an overshoot in its initialization?

GMaid.2 · ‎2023-02-08

I'm performing some experiments with VD6283 breakout board in controlled conditions, and when it got first energized and initialized it presents an overshoot and a huge settling time (around 3 minutes) which is not reproduced in subsequent illuminance condition changes. Is this behavior expected for some particular reason? Or there is an way to overcome this situation?

BR,

Gabriel.

Douglas MILLER · ‎2023-02-14

This forum thread was marked by the moderator as needing a little more investigation, so a Support case was created in your name and will be handled off-line. Should anyone have any similar questions, please feel free to open a Support case directly at your myST portal: https://st.com/ols

Anne BIGOT · ‎2023-08-08

This is not an expected behaviour. What is your initialization routine ?

The sensor should reply within less than a second.

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mkamryn · ‎2023-08-08

The initial overshoot and extended settling time you're experiencing during the first initialization can be influenced by various factors, including startup conditions and the device's internal processes.This behavior can sometimes be due to capacitive effects, power-up sequencing, or calibration processes during the first initialization. It's not uncommon for certain sensors or components to exhibit variations during their initial power-up phase.