EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts   Wearables & Medical  Biometric Sensors    ADS1115IRUGR
ADS1115IRUGR

TIADS1115IRUGR

Texas Instruments
16 Bit Analog to Digital Converter 2, 4 Input 1 Sigma-Delta 10-X2QFN (2x1.5)
Active6,725 in stock
Datasheet Digi-Key Compare Prices

Overview

The Texas Instruments ADS1115 is a 16-bit analog-to-digital converter (ADC) featuring a programmable gain amplifier (PGA) and an I2C interface. It offers a compact solution for precise analog measurements in embedded systems. With its 2 or 4 input channels, it supports both differential and single-ended configurations.

Why Choose This Part

Engineers choose the ADS1115 for its high 16-bit resolution and integrated programmable gain amplifier, which simplifies signal conditioning for a wide range of input voltages. Its I2C interface and selectable address reduce pin count and complexity in microcontroller designs. The small X2QFN package (2x1.5mm) and low power consumption are beneficial for space-constrained and battery-sensitive applications.

Applications

Portable Instrumentation
Its low power consumption (150uA in continuous-conversion mode) and compact X2QFN package make it suitable for battery-powered portable measurement devices.
Temperature Measurement
The 16-bit resolution and PGA allow for accurate digitization of thermistor or thermocouple signals, even with small voltage changes.
Pressure Sensing
Can be used to interface with bridge sensors for pressure measurement, leveraging its differential input capability.
Environmental Monitoring
Suitable for converting analog sensor data from various environmental sensors, such as humidity or gas sensors.
Wearable Medical Devices
Its small footprint and low power make it a good fit for integrating into compact medical sensors or wearable health monitors.
Industrial Process Control
Provides precise data acquisition for monitoring and controlling industrial processes where high accuracy is required.

Key Specifications

Features PGA, Selectable Address
Input Type Differential, Single Ended
Architecture Sigma-Delta
Configuration MUX-PGA-ADC
Mounting Type Surface Mount
Data Interface I2C
Number of Bits 16
Package / Case 10-XFQFN
Reference Type Internal
Number of Inputs 2, 4
Operating Temperature -40degC ~ 125degC
Supplier Device Package 10-X2QFN (2x1.5)
Number of A/D Converters 1
Voltage - Supply, Analog 2V ~ 5.5V
Voltage - Supply, Digital 2V ~ 5.5V
Sampling Rate (Per Second) 860

Getting Started

To get started with the ADS1115, connect it to any microcontroller with an I2C interface. Many open-source libraries are available for platforms like Arduino and Raspberry Pi to simplify I2C communication and ADC readings. Refer to the Texas Instruments datasheet for detailed register configurations and timing information.

ADS1115 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
ADS1115IRUGR (this part) XFQFN-10 6,725
ADS1115IDGSR TFSOP-10 2,787
Also available as: ADS1115LIYCJR, ADS1115LIDGSR, ADS1115

Also Consider

ADS1015 TITexas Instruments - For applications requiring a 12-bit resolution at a potentially lower cost or higher sample rate, the ADS1015 is a pin-compatible alternative.
MCP3424 MCHPMicrochip Technology - This 18-bit delta-sigma ADC offers higher resolution and similar I2C interface with multiple input channels, suitable for more demanding precision applications.

Categories

Wearables & Medical > Biometric Sensors
The 2026 Embedded Online Conference