Product Overview

MPL3115A2R1 is a compact, high-precision I2C digital barometric altimeter sensor based on piezoresistive technology. It supports 20~110 kPa absolute pressure measurement (covering all surface elevations on Earth) and directly outputs 20-bit pressure (Pascal), 20-bit altitude (meter), and 12-bit temperature (℃) data. Equipped with a built-in temperature compensation circuit and high-resolution ADC, it is factory pre-calibrated with calibration coefficients stored. It supports dual operating modes: barometer and altimeter. Features a 32-sample FIFO buffer, supports autonomous data acquisition from 1 second to 9 hours, and two programmable interrupt pins. Operating voltage ranges from 1.95~3.6V, with a package size of 3x5x1.1mm LGA-8, RoHS compliant. It is a universal barometric pressure sensor for consumer electronics and industrial applications, combining ease of use and high performance.

Key Features

• Dual Operating Modes for Flexibility：Supports barometer (20~110 kPa) and altimeter (-700~11775 m) modes. Pressure or altitude data can be read directly without additional algorithm conversion, reducing MCU load.
• High Precision and Resolution：Absolute pressure accuracy of ±0.4 kPa (0~50℃), relative accuracy of ±0.05 kPa, altitude resolution of 0.0625 m, and temperature accuracy of ±1℃ (25℃), meeting professional measurement needs.
• Autonomous Data Acquisition Capability：32-sample FIFO buffer supports data logging for up to 12 days. Programmable acquisition cycle from 1 second to 9 hours reduces host interaction frequency.
• Dual Programmable Interrupts：Equipped with INT1/INT2 dual interrupt pins, supporting 8 interrupt sources including data ready, FIFO events, pressure/temperature thresholds, and variation. Polarity and output mode can be flexibly configured.
• Wide Temperature and Voltage Adaptation：Operating temperature ranges from -40℃ to 85℃, supply voltage from 1.95~3.6V, and digital interface voltage from 1.62~3.6V. ESD protection up to ±2000V (HBM), adapting to multi-scenario environments.
• Technical Specifications

Technical Specifications

Typical Applications

• High-Precision Altimeters and Barometers：Suitable for professional measurement equipment such as outdoor adventure altimeters and weather station pressure monitoring modules. The 20-bit high resolution and ±0.05 kPa relative accuracy ensure data stability and accuracy.
• Smartphones, Tablets and Wearable Devices：As a small low-power pressure sensor, MPL3115A2R1’s compact package fits internal device space. It can implement floor detection, GPS-aided positioning, and sports altitude tracking. The 40 μA low power consumption does not affect device battery life.
• GPS Applications：Aids GPS dead reckoning, map-assisted navigation, and emergency service positioning enhancement. In scenarios where GPS signals are interrupted (such as tunnels), continuous positioning is achieved through pressure changes, improving navigation reliability.
• Weather Station Equipment：Supports long-term autonomous data acquisition. The 32-sample FIFO can buffer multiple sets of pressure and temperature data, combined with a programmable acquisition cycle of 1 second to 9 hours, providing a low-cost and high-reliability measurement solution for micro weather stations.

Why Choose MPL3115A2R1 ?

• Built-in Intelligent Compensation：Integrates temperature compensation and factory calibration, directly outputting compensated data without additional user calibration, simplifying system design.
• Flexible Acquisition Modes：Supports one-shot trigger, continuous acquisition, and autonomous logging. FIFO buffer reduces host polling, lowering overall system power consumption.
• Rich Interrupt Functions：8 independent configurable interrupt sources, dual interrupt pins can route different events separately, adapting to complex data acquisition logic.
• Long-Term Data Logging Capability：32-sample FIFO combined with a maximum 9-hour acquisition cycle enables unattended data logging for long-term monitoring needs.
• High Compatibility：Wide supply voltage and temperature range, easy-to-use I2C interface, and compact LGA-8 package adapt to consumer electronics and industrial equipment.

SUNTOP COMPANY INTRODUCTION

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