Following on from yesterday’s constant current driver, today we have another I2C-controlled device on a nicely sized, easy to use breakout board.This Qwiic/Stemma QT Compatible ADS1115 16-bit ADC board makes it easy to get high-resolution analog measurements to your microcontroller.The ADS1115 is not just a low-power, high-resolution ADC – it also has a built-in programmable gain amplifier and a digital comparator.
However, these are not high-speed ADCs – the typical maximum sample speed is 860 samples per second.Even though the sample rate is low, the accuracy and drift specs are great.Integral nonlinearity and offset error are typically under 3-4 LSBs, with long-term offset drift of just ±1 LSB after 1000 hours at 125°C.
If you want to do long-term, low-drift accurate measurements, it’s hard to beat a low-power ADC like this.And it does all this while using 150μA operating, and just 500nA in sleep mode, making it ideal for remote, battery-powered devices.This PCB has nice, big solder pads for the 4 inputs (which can be used as 2 differential inputs if desired).
You can easily change the I2C address to get more than one on the same bus.And with lots of documentation and example code out there, you can get up and running quickly! Just grab a board that has a Qwiic/Stemma QT connector, attach this breakout, and you’ll be getting accurate, high-resolution measurements in minutes. Like this:Like Loading...