The maximum sampling rate of the ADS1115 is 860 samples per second (SPS) for a single channel, and 240 SPS for multiple channels.
The gain settings for the ADS1115 can be configured using the PGA (Programmable Gain Amplifier) bits in the Config Register. The gain can be set to 2/3, 1, 2, 4, 8, or 16.
The DRDY (Data Ready) pin is an output pin that goes low when a conversion is complete and the data is ready to be read. It can be used to interrupt the microcontroller to read the data.
To handle noise and interference on the ADS1115, use a low-pass filter on the analog input, use a shielded cable, and keep the analog input wires away from digital signals. Also, consider using a ferrite bead or a common-mode choke to filter out high-frequency noise.
The power consumption of the ADS1115 is typically 360 μA at 3.3V supply voltage, but it can be reduced to 23 μA in power-down mode.