STMicroelectronics LPS33K MEMS Pressure Sensor

STMicroelectronics LPS33K MEMS Pressure Sensor combines a sensing element based on a piezoresistive Wheatstone bridge approach with an I²C interface in a single compact package. The sensing element, which detects absolute pressure, consists of a suspended silicon membrane. When pressure is applied, the membrane deflection induces an imbalance in the Wheatstone bridge, and the output signal is converted by the IC interface. The LPS33K features a data-ready signal which indicates when a new set of measured pressure and temperature data are available, thus simplifying data synchronization in the digital system that uses the device.

The LPS33W is available in a ceramic LGA package with metal lid. The package is holed to allow external pressure to reach the sensing element. The gel inside the IC protects the electrical components from harsh environmental conditions.

Features

300hPa to 1260hPa absolute pressure range
Current consumption down to 3μA
20x full-scale overpressure capability
Embedded temperature compensation
24-bit pressure data output
16-bit temperature data output
Output data rate from 1Hz to 75Hz

SPI and I²C interfaces
Embedded FIFO
Data-ready, FIFO flags, and pressure thresholds interrupt functions
1.7V to 3.6V supply voltage
CCLGA 10L potted gel ceramic package
3.3mm x 3.3mm x 2.9mm footprint
ECOPACK^® lead-free compliant

Applications

Wearable devices
Altimeters and barometers for portable devices

GPS applications
Weather station equipment

Application Notes

LPS33K: MEMS Pressure Sensor with Potted Gel Package
Surface Mount Guidelines for MEMS Sensors in HLGA Packages
Digital Pressure Sensor: Efficient Design Tips

STMicroelectronics LPS33K MEMS Pressure Sensor

Features

Applications

Application Notes

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