ADS1115IRUGT-Comprehensive Enablement of Intelligent Applications with High-Performance 16-Bit ADC

Overview

The ADS1115IRUGT is a 16-bit high-precision analog-to-digital converter launched by Texas Instruments. It communicates via I²C interface and supports up to 4 single-ended or 2 differential inputs. It features an internal programmable gain amplifier (PGA) and supports various input voltage ranges. With extremely low power consumption, it is particularly suitable for portable applications powered by batteries. Compared with other packages of the ADS1115 series, the IRUGT version adopts the X2QFN (RUG) 10-pin package, with a size of only 1.5 mm x 1.5 mm. This is particularly suitable for designs with strict limitations on PCB area.

Features

•Ultra-small package:

-X2QFN: 2mm×1.5mm×0.4mm

-SOT: 2.9mm×2.8mm×0.6mm

•Wide power supply voltage range: 2.0V to 5.5V

•Low current consumption: 150μA (continuous conversion mode)

•Programmable data rate: 8SPS to 860SPS

•Single-cycle stability

•Internal low-drift voltage reference

•Internal oscillator

•I2C interface: four-pin selectable address

•Operating temperature range: -40°C to +125°C

•Device series:

-ADS1113: 1 single-ended (SE) or differential (DE) input

-ADS1114: 1 single-ended or differential input with comparator and PGA

-ADS1115: 4 single-ended inputs or 2 differential inputs, with comparator and PGA

Application

1. Portable Instruments

Application Features:

Portable instruments require low power consumption, high precision, and compact ADCs.

Examples: handheld glucometers, portable multimeters, portable gas detectors, etc.

Advantages of ADS1115IRUGT:

16-bit high resolution allows capturing tiny signal variations and improves measurement accuracy.

Extremely low power consumption in single-shot mode (approx. 150 µA), extending battery life.

Compact QFN package fits tight internal layouts of portable devices.

Integrated PGA supports a wide range of input signal levels without the need for external amplification.

2. Battery Voltage and Current Monitoring

Application Features:

Battery management systems (BMS) or portable devices require real-time monitoring of voltage, current, temperature, etc.

High precision is necessary to prevent overcharging, over-discharging, and unbalanced charging.

Advantages of ADS1115IRUGT:

±6.144V input range supports sampling of most series-connected lithium battery voltages.

PGA can amplify small voltage drops across shunt resistors for current sensing.

Multi-channel input allows simultaneous monitoring of voltage, current, and temperature.

Fast I²C communication makes integration with MCUs or FPGAs easy.

3. Temperature Measurement Systems

Application Features:

Many sensors (such as thermocouples, thermistors, PT100, etc.) output very weak analog signals requiring high-precision acquisition.

Temperature monitoring is widely used in industrial, medical, and environmental monitoring fields.

Advantages of ADS1115IRUGT:

Built-in PGA easily amplifies tiny millivolt-level temperature sensor signals.

16-bit resolution provides high temperature sensitivity and stability.

Multi-channel support allows simultaneous monitoring of multiple temperature points.

High stability and low long-term drift make it suitable for high-reliability monitoring systems.

4. Consumer Electronics

Application Features:

Smart home devices integrate various sensors and require compact size and low power.

Common examples: smart home systems, wearables, game controllers, VR headsets, etc.

Advantages of ADS1115IRUGT:

Ultra-small package saves PCB space, ideal for miniaturized electronics.

Multi-channel support allows integration of various sensors.

Low power consumption extends standby time, meeting long battery life needs.

High resolution improves measurement accuracy and user experience.

5. Factory Automation and Process Control

Application Features:

Industrial process control requires highly accurate, stable, and reliable signal acquisition.

Multiple analog sensor signals need to be accurately acquired and controlled.

Advantages of ADS1115IRUGT:

Programmable input range±256mV to±6.144V is compatible with standard industrial signals like 4-20mA and 0-10V (via resistor/divider adaptation).

High precision ADC ensures stable long-term operation and process control accuracy.

Industrial temperature grade (-40℃to +125℃) adapts to harsh environments.

Fast sampling rate meets dynamic process control needs.

Multi-channel monitoring allows real-time supervision of multiple sensor statuses.

Usage Suggestions

Power Decoupling: Place a 0.1µF surface mount ceramic capacitor at the VDD pin to enhance power supply stability;

Input Filtering: Add an RC filter (such as 1kΩ+ 1nF) at the analog input front end to reduce high-frequency noise interference;

I²C Line Protection: Appropriately add an upper pull-up resistor (generally 4.7kΩ~ 10kΩ); Packaging welding: Due to the small size of the QFN package, the reflow soldering process is recommended. During PCB layout, make sure to leave space for the solder pads and the design for heat dissipation and grounding.

Conclusion

The ADS1115IRUGT, with its high precision, low power consumption, small package size and high cost-effectiveness, has become an ideal ADC solution for numerous embedded and portable measurement systems. Especially in applications where size is limited but high-precision signal acquisition is required, its advantages are particularly prominent. Whether in engineering projects, scientific research and development, or mass production applications, the ADS1115IRUGT can provide stable and reliable performance guarantees.