LPS33W – MEMS pressure sensor withstands harsh environment

MEMS pressure sensor: 260-1260 hPa absolute digital output barometer with potted gel package.

STMicroelectronics LPS33W MEMS Pressure Sensor is ultra compact and functions as a digital output barometer. The LPS33W combines a sensing element and an IC interface which communicates through I²C or SPI from the sensing element to the application. Detecting absolute pressure, the sensing element consists of a suspended membrane manufactured using a dedicated process developed by ST.

The LPS33W is available in a ceramic LGA package with metal lid, and 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, and gel inside the IC protects the electrical components from harsh environmental conditions.

Key Features

• Pressure sensor with potted gel package
• 260 to 1260hPa absolute pressure range
• Current consumption down to 3μA
• High overpressure capability: 20x full scale
• Embedded temperature compensation
• 24-bit pressure data output
• 16-bit temperature data output
• ODR from 1Hz to 75Hz
• SPI and I²C interfaces
• Embedded FIFO
• Interrupt functions: data-ready, FIFO flags, pressure thresholds
• Supply voltage: 1.7 to 3.6V
• ECOPACK^® lead-free compliant

The LPS33W operates at just 15µA in high-performance mode, with a 3µA low-power mode and 1µA power-down to help maximize runtime of battery-powered devices. A generous 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 LPS33W is in mass production now, in a 3.3mm-diameter x 2.9mm cylindrical metal case, priced from $3.60 for orders of 1000 pieces. For more information, visit www.st.com/lps33w-pr

Please follow and like us: