MPL3115A2 - I2C Barometric Pressure/Altitude/Temperature Sensor - P00115


Quick Overview:       14523
This pressure sensor from Freescale is a great low-cost sensing solution for precision measurement of barometric pressure and altitude. The MPL3115A2 has a typical 1.5 Pascal resolution, which can resolve altitude at 0.3 meters (compare to the BMP180 which can do 0.17m).


Technical Specifications
Reviews (3800)

This pressure sensor from Freescale is a great low-cost sensing solution for precision measurement of barometric pressure and altitude. The MPL3115A2 has a typical 1.5 Pascal resolution, which can resolve altitude at 0.3 meters (compare to the BMP180 which can do 0.17m). It has some upsides compared to the BMP180, such as interrupt outputs for ultra-low power usage, and its also a heck of a lot easier to read altitude with a built in altimeter calculation - no calibration reading and calculating required. As a bonus, there's even a fairly good temperature sensor with Ī1įC typical accuracy (Ī3įC max).

This chip likes to be used with 2-3.6V power and logic voltages, so we placed it on a breakout with a 3V regulator and logic level shifting. Its easy to use with any Arduino or microcontroller that has i2c capability.

This chip looks and sounds a whole lot like the MPL115A2 but this is the precision version, which can act as an altitude-sensor as well as barometer

Using the sensor is easy. For example, if you're using an Arduino, simply connect the VDD pin to the 5V voltage pin, GND to ground, SCL to I2C Clock (Analog 5 on an UNO) and SDA to I2C Data (Analog 4 on an UNO). Then download our MPL3115A2 Arduino library and example code for temperature, pressure and basic altitude calculation. Install the library, and load the example sketch. Immediately you'll have the temperature, pressure and altitude data printed in the serial console.


  • 1.95V to 3.6V Supply Voltage, internally regulated by LDO
  • 1.6V to 3.6V Digital Interface Supply Voltage
  • Fully Compensated internally
  • Direct Reading, Compensated
    • Pressure: 20-bit measurement (Pascals)
    • Altitude: 20-bit measurement (meters)
    • Temperature: 12-bit measurement (degrees Celsius)
  • Programmable Events
  • Autonomous Data Acquisition
  • Resolution down to 1 ft. / 30 cm
  • 32 Sample FIFO
  • Ability to log data up to 12 days using the FIFO
  • 1 second to 9 hour data acquisition rate
  • I2C digital output interface (operates up to 400 kHz)

3800 Reviews for MPL3115A2 - I2C Barometric Pressure/Altitude/Temperature Sensor

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