General description
The MPL3115A2 is a compact, piezoresistive, absolute pressure sensor with an I2C digital interface. MPL3115A2 has a wide operating range of 20 kPa to 110 kPa, a range that covers all surface elevations on earth. The MEMS is temperature compensated utilizing an on-chip temperature sensor. The pressure and temperature data is fed into a high resolution ADC to provide fully compensated and digitized outputs for pressure in Pascals and temperature in °C. The compensated pressure output can then be converted to altitude, utilizing the formula stated in Section 9.1.3 "Pressure/altitude" provided in meters.The internal processing in MPL3115A2 removes compensation and unit conversion load from the system MCU, simplifying system design.

FEATUREs and benefits
• Operating range: 20 kPa to 110 kPa absolute pressure
• Calibrated range: 50 kPa to 110 kPa absolute pressure
• Calibrated temperature output: −40 °C to 85 °C
• I2C digital output interface
• Fully compensated internally
• Precision ADC resulting in 0.1 meter of effective resolution
• Direct reading
   – Pressure: 20-bit measurement (Pascals)
      – 20 to 110 kPa
   – Altitude: 20-bit measurement (meters)
      – –698 to 11,775 m
   – Temperature: 12-bit measurement (°C)
      – –40 °C to 85 °C
• Programmable interrupts
• Autonomous data acquisition
   – Embedded 32-sample FIFO
   – Data logging up to 12 days using the FIFO
   – One-second to nine-hour data acquisition rate
• 1.95 V to 3.6 V supply voltage, internally regulated
• 1.6 V to 3.6 V digital interface supply voltage
• Operating temperature from −40 °C to +85 °C

APPLICATIONs
• High-accuracy altimetry and barometry
• Smartphones, tablets and wearable devices
• GPS applications: dead reckoning, map assist, navigation, enhancement for emergency services
• Weather station equipment