1answers

[Others] How to read a 5V ratiometric sensor using a 1.1V fixed vref ADC?

The ACS712 outputs a voltage from 0-5V and the ESP32 ADC reads from 0 to 3.3V using 1.1V as vref. There is a voltage divider already to reduce the 5V to 3.3 range.The problem is: voltage drops on the power supply affects the ACS712 output. I consider that if it might work by using an external ADC with external vref tied to the 5V rail.
Ranking Name Answers
1 Nikola Krneta 11
2 Pete Dudash 4
3 Viacheslav 3
4 PCBWay Support 2
5 VinmaMat 2
6 Allianbo Guu 1
7 Ali Mohammed 1
8 Carl 1
9 Joson 1
10 Yashodha Salgado 1