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SparkFun Qwiic 12 Bit ADC - 4 Channel (ADS1015)

A lot of the time you just need to add more analog inputs to solve a problem. It happens. The SparkFun Qwiic 12 Bit ADC can provide four channels of I2C controlled ADC input to your Qwiic enabled project. These channels can be used as single-ended inputs, or in pairs for differential inputs. What makes this even more powerful is that it has a programmable gain amplifier that lets you "zoom in" on a very small change in analog voltage (but will still effect your input range and resolution). Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a breadboard.

The ADS1015 uses its own internal voltage reference for measurements, but a ground and 3.3V reference are also available on the pin outs for users. This ADC board includes screw pin terminals on the four channels of input, allowing for solderless connection to voltage sources in your setup. It also has an address jumper that lets you choose one of four unique addresses (0x48, 0x49, 0x4A, 0x4B). With this, you can connect up to four of these on the same I2C bus and have sixteen channels of ADC. The maximum resolution of the converter is 12-bits in differential mode and 11-bits for single-ended inputs. Step sizes range from 125μV per count to 3mV per count depending on the full-scale range (FSR) setting.

We have included an onboard 10K trimpot connected to channel A3. This is handy for initial setup testing and can be used as a simple variable input to your project. But don't worry, we added an isolation jumper so you can use channel A3 however you'd like.


The SparkFun Qwiic connect system is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.


  • ADS1015
    • Operating Voltage (VDD): 2.0V-5.5V
      • (Note: When powering with a Qwiic cable, the input range is only 3.3v)
    • Operating Temperature: -40°C to 125°C
    • Operation Modes: Single-Shot, Continuous-Conversion (Default), and Duty Cycling
    • Analog Inputs:
      • Measurement Type: Single-Ended (Default)
      • Input Voltage Range: GND to VDD
      • Full Scale Range (FSR): ±.256V to ±6.114V (Default: 2.048V)
    • Resolution:
      • 12-bit (Differential) or 11-bit (Single-Ended)
      • LSB size: 0.125mV - 3mV (Default: 1 mV)
    • Sample Rate: 128 Hz to 3.3 kHz (Default: 1600SPS)
    • Current Consumption (Typical): 150μA-200μA
    • I2C Address: 0x48 (Default), 0x49, 0x4A, or 0x4B
  • Screw pin terminals for solderless connection to voltage sources
  • Four unique I2C addresses:
    • 0x48
    • 0x49
    • 0x4A
    • 0x4B
  • 2x Qwiic connection ports
  • Onboard 10K trimpot

SparkFun Qwiic 12 Bit ADC - 4 Channel (ADS1015) Product Help and Resources

Qwiic 12-Bit ADC Hookup Guide

May 23, 2019

Need to add more analog inputs for your project? Check out the Qwiic 12-bit ADC.

Core Skill: DIY

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1 DIY

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Core Skill: Programming

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3 Programming

Skill Level: Competent - The toolchain for programming is a bit more complex and will examples may not be explicitly provided for you. You will be required to have a fundamental knowledge of programming and be required to provide your own code. You may need to modify existing libraries or code to work with your specific hardware. Sensor and hardware interfaces will be SPI or I2C.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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