Adafruit ADS1115 ADC

Most microcontrollers have limited resolution, often 10-bit or 12-bit. The ADS1115 provides 16-bit resolution, which offers significantly higher precision and accuracy for sensitive sensor readings, plus an integrated programmable gain amplifier to boost very small signals.

Yes, it is fully compatible with all three. Adafruit provides extensive libraries and example code for Arduino, CircuitPython, and Raspberry Pi to make integration straightforward regardless of your platform.

You can connect up to four ADS1115 devices on a single I2C bus. The board features selectable I2C addresses (0x48 through 0x4B), allowing you to daisy-chain them without address conflicts.

The PGA allows you to amplify small input signals before they are converted to digital data. This is particularly useful when measuring low-voltage sensors, as it effectively increases the resolution of your readings by utilizing the full range of the ADC.

No, it does not require soldering if you use the included STEMMA QT connectors. These allow for a plug-and-play, solderless connection to compatible microcontrollers, though you can still solder header pins if you prefer a traditional breadboard setup.

Single-ended mode allows you to measure four independent signals relative to ground. Differential mode uses two pins to measure the voltage difference between them, which is excellent for rejecting common-mode noise and improving accuracy in electrically noisy environments.