1 General description

The MPL3150A2 is a compact, piezoresistive, absolute pressure sensor with an I2C digital interface.

MPL3150A2 has a wide operating range of 50 kPa to 150 kPa. 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 internal processing in MPL3150A2 removes compensation and unit conversion load from the system MCU, simplifying system design.

MPL3150A2's advanced ASIC has multiple user programmable modes such as power saving, interrupt and autonomous data acquisition modes, including programmed acquisition cycle timing, and poll-only modes. Typical active supply current is 40 μA per measurement-second and is offered in a 5 mm x 3 mm x 1.1 mm LGA RoHS compliant package.

2 Features and benefits

• Operating range: 50 kPa to 150 kPa absolute pressure

• Calibrated range: 70 kPa to 150 kPa absolute pressure

• Calibrated temperature output: −40 °C to 85 °C

• I2C digital output interface

• Fully compensated internally

• Direct reading

– Pressure: 20-bit measurement (Pascals)

– 50 kPa to 150 kPa

– 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

3 Applications

• High-accuracy barometry

• Smartphones, tablets, and wearable devices

• GPS applications: dead reckoning, map assist, navigation, enhancement for emergency services

• Weather station equipment