STMicro’s Water-Resistant MEMS Pressure Sensors Target Budget-Conscious Applications

March 20, 2019 Alix Paultre

The STMicroelectronics LPS33W water-resistant MEMS pressure sensor combines chemical compatibility, stability, and accuracy for applications such as fitness trackers and other wearables, vacuum cleaners, and general-purpose industrial sensing. Protected by a viscous potting gel inside the cylindrical metal package, the IPx8-rated LPS33W withstands salt water, chlorine, bromine, and detergents such as hand soap and shampoo, e-liquids, and light industrial chemicals such as n-pentane.

Features include a built-in signal-conditioning ASIC, and a 0.008hPa RMS pressure noise for excellent measurement resolution. Susceptibility to reflow-soldering stress during assembly is also extremely low, drifting less than ±2hPa and recovering normal accuracy in 72 hours. Temperature compensation keeps accuracy within ±3hPa over the operating range from 0°C to 65°C.

The LPS33W operates at just 15µA in high-performance mode, with a 3µA low-power mode and 1µA power-down. A 128-bit FIFO stores up to 40 slots of 32-bit pressure and temperature data, helping save extra power by minimizing intervention from the host microcontroller. A low-pass filter and I2C and SPI digital interfaces are also built-in. The 3.3mm-diameter x 2.9mm cylindrical metal-cased LPS33W is priced from $3.60 for orders of 1000 pieces.

For more information, visit

Previous Article
Micron’s Automotive-Grade UFS Portfolio Provides Immersive Cabin Experience in Connected Vehicles

Micron UFS 2.1 managed NAND delivers ultrafast boot and reliability in broad range of capacities.

Next Article
Olea Sensor Networks Launches OleaVision360™

OleaVision360™ is a novel guidance system for drones and autonomous applications.