cdot123
Posts: 1
Joined: Tue Feb 13, 2018 1:26 am

3.3V to 1.8V for I2C sensor VDDIO?

Tue Feb 13, 2018 1:31 am

I'm trying to connect several ICM-20948 IMUs to the Pi Zero W, over I2C. The 3.3V put out by the Pi is well within the range of VDD for the IMU component, but is above the 1.8V needed for it on VDDIO.

What's the easiest way for me to bring the voltage down for that connection? I tried looking for a breakout board with a 1.8V voltage regulator, but didn't find one in the usual places.

tatulea
Posts: 1
Joined: Sat Jul 28, 2018 2:29 pm

Re: 3.3V to 1.8V for I2C sensor VDDIO?

Sat Jul 28, 2018 2:30 pm

Hi, are you still using ICM-20948?

DPEng
Posts: 1
Joined: Sat Dec 08, 2018 11:44 am

Re: 3.3V to 1.8V for I2C sensor VDDIO?

Sat Dec 08, 2018 11:47 am

Hi there,

I have created a breakout board with 1.8V on board voltage regulator and I2C/SPI voltage translation. Stock is available for sale on Ebay: https://www.ebay.co.uk/itm/323724746939

Also you can check out my Arduino library for the ICM-20948 on Github:
https://github.com/drcpattison/DPEng_ICM20948_AK09916

It includes raw sensor data, magnetometer calibration and AHRS sketches.

Kind regards,
DPEng

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