The ADS1115 is a high-precision 16-bit ADC designed for accurate and stable analog-to-digital conversion in a wide range of electronics, sensor monitoring, and microcontroller projects. With support for up to 860 samples per second and a built-in programmable gain amplifier (PGA), it allows developers to read small signals with enhanced resolution. The module offers four single-ended inputs or two differential inputs, making it ideal for multi-sensor applications. Fully compatible with Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers via I2C communication. Its wide input voltage support (2V–5V) makes it flexible for various embedded systems and DIY electronics projects.

Features:

• High-resolution 16-bit analog-to-digital conversion

• Supports 860 samples per second for fast signal capture

• Four single-ended channels or two differential channels

• Built-in programmable gain amplifier up to x16 for signal boosting

• Wide supply voltage range from 2.0V to 5.5V

• Ultra-low power consumption: 150μA in continuous mode

• Auto shutdown in single-shot mode for energy efficiency

• Pin-selectable I2C addresses (0x48–0x4B)

• Internal voltage reference and low-drift oscillator for stable readings

• Easy integration with Arduino, Raspberry Pi, ESP8266, ESP32, STM32

• Ideal for sensors, voltage monitoring, audio analysis, scientific experiments

• Compact and reliable module for precise measurement applications

How to Use:

• Connect VCC (2.0–5.5V) and GND to your microcontroller

• Connect SDA and SCL to the I2C pins of the development board

• Select the I2C address using the onboard jumpers

• Choose between single-ended or differential input configurations

• Feed analog sensor signals to A0–A3 pins

• Use available libraries (Arduino ADS1115 library, Python Adafruit ADS1x15, etc.)

• Configure gain settings based on input voltage range

• Read data at up to 860 samples/second depending on project requirements

Application Instructions:

• Suitable for temperature sensors, light sensors, gas sensors, audio input, voltage sensing

• Use differential mode for noise reduction in low-signal environments

• Apply proper gain for small mV-level sensors such as load cells and thermocouples

• Place the module away from high-power circuits for noise-free readings

• Use shielded cables for long sensor wires

• Ensure input voltage does not exceed the ADC's allowed limits

Specifications:

• Supply Voltage: 2.0V – 5.5V

• Resolution: 16-Bit

• Current Consumption: 150μA (continuous mode)

• Data Rate: 8 SPS to 860 SPS

• Input Modes: 4 single-ended or 2 differential

• Communication: I2C (7-bit address 0x48–0x4B)

• Features: Internal voltage reference, internal oscillator, internal PGA

• Comparator: Programmable threshold comparator

• Compatibility: Arduino, Raspberry Pi, ESP32, ESP8266, STM32, MicroPython

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