Hi,
I am wanting to create a circuit board with a Bipolar ADC on it and not sure what the best option would be.
I am using an esp32 but wanted to use an external ADC (surface mount) for better accuracy. The range that I want to measure is -2.4V->+2.4V. My first attempt I thought to just use a simple voltage divider, an ADC (ADS1115) and the 3V3 on the ESP32 to boost the signal so I could measure negatives which worked ok but the 3V3 fluctuates a lot with temperature which decreases the accuracy dramatically. I did do some calibration that made it a bit better but I feel it would be much easier to just use a bipolar ADC.
Is getting a bipolar ADC the easier way? What types of bipolar ADC's should I go for? Any specific recommendations? I would like to have 4 channels with mV accuracy if possible.
Sorry if I am asking a stupid question or it has been asked before. I did search the forum and couldn't find anything.
I am wanting to create a circuit board with a Bipolar ADC on it and not sure what the best option would be.
I am using an esp32 but wanted to use an external ADC (surface mount) for better accuracy. The range that I want to measure is -2.4V->+2.4V. My first attempt I thought to just use a simple voltage divider, an ADC (ADS1115) and the 3V3 on the ESP32 to boost the signal so I could measure negatives which worked ok but the 3V3 fluctuates a lot with temperature which decreases the accuracy dramatically. I did do some calibration that made it a bit better but I feel it would be much easier to just use a bipolar ADC.
Is getting a bipolar ADC the easier way? What types of bipolar ADC's should I go for? Any specific recommendations? I would like to have 4 channels with mV accuracy if possible.
Sorry if I am asking a stupid question or it has been asked before. I did search the forum and couldn't find anything.