Overview
The MPL3115A2 is a compact, piezoresistive, absolute pressure sensor developed by NXP USA Inc. It features an I2C digital interface and is designed for high accuracy in measuring pressure and altitude. The sensor operates within a wide range of 20 kPa to 110 kPa, covering all surface elevations on Earth. It also includes an on-chip temperature sensor for temperature compensation, ensuring accurate readings across various environmental conditions. The MPL3115A2 is particularly useful in applications requiring precise altimetry and barometry, such as in smartphones, tablets, wearable devices, and GPS systems.
Key Specifications
| Parameter | Specification |
|---|---|
| Operating Pressure Range | 20 kPa to 110 kPa |
| Calibrated Pressure Range | 50 kPa to 110 kPa |
| Calibrated Temperature Range | −40 °C to 85 °C |
| Interface | I2C (up to 400 kHz) |
| Supply Voltage | 1.95 V to 3.6 V (internally regulated) |
| Digital Interface Supply Voltage | 1.6 V to 3.6 V |
| Operating Temperature | −40 °C to +85 °C |
| Pressure Resolution | 20-bit measurement (Pascals) |
| Altitude Resolution | 20-bit measurement (meters), −698 to 11,775 m |
| Temperature Resolution | 12-bit measurement (°C) |
| Active Supply Current | Typical 40 μA per measurement-second |
| Package | 8-LGA (3x5 mm), surface mount with stainless steel lid, RoHS compliant |
Key Features
- Fully compensated internally for pressure and temperature.
- Precision ADC resulting in 0.1 meter effective resolution for altitude.
- Direct reading capabilities for pressure (20-bit, Pascals), altitude (20-bit, meters), and temperature (12-bit, °C).
- Programmable interrupts and autonomous data acquisition modes.
- Embedded 32-sample FIFO for data logging up to 12 days.
- Data acquisition rate from 1 second to 9 hours.
- Multiple user-programmable modes including power saving, interrupt, and poll-only modes.
Applications
- High-accuracy altimetry and barometry.
- Smartphones, tablets, and wearable devices.
- GPS applications: dead reckoning, map assist, navigation, and enhancement for emergency services.
- Weather station equipment.
- UAV controllers and other altitude-sensitive applications.
Q & A
- What is the operating pressure range of the MPL3115A2?
The MPL3115A2 operates within a pressure range of 20 kPa to 110 kPa.
- What is the calibrated temperature range for the MPL3115A2?
The calibrated temperature range is −40 °C to 85 °C.
- What type of interface does the MPL3115A2 use?
The MPL3115A2 uses an I2C digital interface that operates up to 400 kHz.
- What is the supply voltage range for the MPL3115A2?
The supply voltage range is 1.95 V to 3.6 V, internally regulated.
- How accurate is the altitude measurement of the MPL3115A2?
The MPL3115A2 provides an altitude resolution of 0.1 meters, with measurements ranging from −698 to 11,775 meters.
- What are the key features of the MPL3115A2's data acquisition capabilities?
The MPL3115A2 features autonomous data acquisition with a 32-sample FIFO, allowing data logging up to 12 days and a data acquisition rate from 1 second to 9 hours.
- What are some common applications of the MPL3115A2?
Common applications include high-accuracy altimetry, smartphones, tablets, wearable devices, GPS systems, and weather station equipment.
- How does the MPL3115A2 handle temperature compensation?
The MPL3115A2 uses an on-chip temperature sensor to provide temperature compensation, ensuring accurate pressure and altitude readings across various temperatures.
- What is the typical active supply current of the MPL3115A2?
The typical active supply current is 40 μA per measurement-second.
- Is the MPL3115A2 RoHS compliant?
