Datasheet

Grove - 4 Channel 16-bit ADC (ADS1115) w/
Programmable Amplifier Gain
Key Features
Wide supply range: 2.0V ~ 5.5V, support 3.3/5V system
16-bit high-resolution ADC
Programmable Data Rate: 8 SPS to 860 SPS
Internal Programmable Gain: x16 with Internal low-drift voltage reference and
oscillator
The built-in PGA is gain-adjustable and can be controlled by software
4 Single-Ended Inputs or 2 Differential Inputs
Description
We know that Raspberry Pi is ADC-free and its I/O can only handle digital signals.
Therefore, when analog sensors are involved, an external ADC module is needed to
convert the analog signal to digital. On the other hand, although most Arduino(like
Arduino UNO) come with a 10-bit ADC, which is not very accurate, and the resolution
is affected by the reference voltage, so it is not suitable for some applications where
high accuracy is required and the operating voltage range is wide. The Grove ADS1115
solves these problems perfectly.