ADS1115 16-Bit I2C ADC Module

The ADS1115 is a 16-bit analog-to-digital converter (ADC) with four channels and a programmable gain amplifier, communicating over I2C. It converts analog voltage from sensors (0–1023 resolution vs Arduino's standard 10-bit) into precise digital readings for microcontrollers. Its wide voltage range and built-in comparator make it ideal for precision sensor measurement in embedded projects.

Key Specifications

What You Can Build With This

• Precision temperature logger using thermocouples or thermistors
• 4-channel voltage data acquisition system for lab experiments
• Light intensity mapping with photoresistors on multiple points
• Battery monitoring circuit for solar-powered IoT nodes

Compatibility

The ADS1115 works with any board that has I2C, including Arduino Uno, Mega, Nano, Raspberry Pi, ESP32, and STM32. It uses logic-level tolerant pins, so direct connection to 3.3V or 5V systems is safe. Common pairings include load cells with HX711 for scale projects or analog pH meters.

Wiring Notes

Connect VDD to 3.3V/5V, GND to ground, SDA and SCL to corresponding pins (A4/A5 on Arduino Uno). Pull-up resistors (4.7kΩ typical) are required on SDA/SCL if your board doesn't have them. Address pin ADDR can be tied to GND, VDD, SDA, or SCL for four different addresses, allowing multiple modules on one bus.

Why Buy from Compoden

Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.