MEMS pressure sensor, 260-1260 mbar absolute digital output barometer

The LPS331AP is an ultra compact absolute piezoresistive pressure sensor. It includes a monolithic sensing element and an IC interface able to take the information from the sensing element and to provide a digital signal to the external world.

The sensing element consists of a suspended membrane realized inside a single mono-silicon substrate. It is capable to detecting pressure and is manufactured using a dedicated process developed by ST, called VENSENS.

The VENSENS process allows to build a mono-silicon membrane above an air cavity with controlled gap and defined pressure. The membrane is very small compared to the traditionally built silicon micromachined membranes. Membrane breakage is prevented by an intrinsic mechanical stopper.

The IC interface is manufactured using a standard CMOS process that allows a high level of integration to design a dedicated circuit which is trimmed to better match the sensing element characteristics.

The LPS331AP is available in a small holed cap land grid array (HCLGA) package and it is guaranteed to operate over a temperature range extending from -40 °C to +85 °C. The package is holed to allow external pressure to reach the sensing element.

Key Features

  • 260 to 1260 mbar absolute pressure range
  • High-resolution mode: 0.020 mbar RMS
  • Low power consumption:
    • Low resolution mode: 5.5 μA
    • High resolution mode: 30 μA
  • High overpressure capability: 20x full scale
  • Embedded temperature compensation
  • Embedded 24-bit ADC
  • Selectable ODR from 1 Hz to 25 Hz
  • SPI and I2C interfaces
  • Supply voltage: 1.71 to 3.6 V
  • High shock survivability: 10,000 g
  • Small and thin package
  • ECOPACK® lead-free compliant

Design

Technical Documentation

Product Specifications
Description Version Size
DS8615 DS8615: MEMS pressure sensor: 260-1260 mbar absolute digital output barometer 7.0 442 KB
Application Notes
Description Version Size
AN4159 AN4159: Hardware and software guidelines for use of the LPS331AP 3.0 647 KB
Technical Notes & Articles
Description Version Size
TN1180 TN1180: How to interpret pressure and temperature readings in the LPS331AP pressure sensor 2.0 183 KB
TN1198 TN1198: Surface mount guidelines for MEMS sensors in HLGA packages 1.0 128 KB

Publications and Collaterals

Flyers
Description Version Size
LPS331AP high-resolution MEMS pressure sensor 1.0 1008 KB

Tools and Software

Evaluation Tools
Product Evaluation Tools
Support & Community

Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
LPS331APTR HCLGA 3x3 Tape And Reel NRND - - NEC EAR99 - MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LPS331APTR NRNDHCLGA 3x3IndustrialEcopack2 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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