LPS28DFW Dual Full-Scale, Absolute Digital Output Barometer

STMicroelectronics’ ultra-compact piezoresistive absolute pressure sensor functions as a digital output barometer

STMicroelectronics’ LPS28DFW is an ultra-compact piezoresistive absolute pressure sensor that functions as a digital output barometer. The device comprises a sensing element and an IC interface that communicates over the I²C or MIPI I3C^SM interface from the sensing element to the application. The LPS28DFW provides lower power consumption, achieving lower pressure noise than its predecessor.

The LPS28DFW is available in a ceramic LGA package with a metal lid. 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. Gel inside the IC protects the electrical components from water, and the metal cap is, optionally, connected to ground or left floating electrically in the application PCB layout. The connection of the metal cap is determined according to the customer’s target application.

This device has been designed to meet the requirements and mission profile for personal electronics and consumer applications.

Features

• Dual full-scale absolute pressure with water-resistant package
  • Mode 1: 260 hPa ~ 1260 hPa
  • Mode 2: 260 hPa ~ 4060 hPa
• Current consumption down to 1.7 μA
• Absolute pressure accuracy: 0.5 hPa
• Low-pressure sensor noise: 0.32 Pa
• Embedded temperature compensation
• 24-bit pressure data output
• ODR from 1 Hz to 200 Hz
• I²C or MIPI I3CSM interface
• Embedded FIFO
• Interrupt functions: data-ready, FIFO flags, pressure thresholds
• Supply voltage: 1.7 V to 3.6 V
• Easily sealed package with O-ring
• ECOPACK lead-free compliant

Applications

• Wearables
• Altimeters and barometers for portable devices
• GPS applications
• Weather station equipment
• Sport watches
• e-cigarettes
• Water depth monitoring

more information: https://www.st.com/en/mems-and-sensors/lps28dfw.html

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