SparkFun Absolute Digital Barometer - LPS28DFW (Qwiic)

The SparkFun Qwiic LPS28DFW Absolute Digital Barometer is a uniquely designed barometer breakout that features the LPS28DFW from STMicroelectronics^©. This sensor is water-resistant, making it suitable for pressure measurement applications where the sensor might be exposed to or submerged in water. Thanks to the Qwiic system, this barometer can be integrated into your I²C system without the need for soldering. The breakout also includes 2.54mm-spaced PTH pins connected to the sensor's communication interface and interrupt pins, perfect for applications that require a traditional soldered connection.

The LPS28DFW sensor has two full-scale measurement ranges of 260 - 1260hPa and 260 - 4060hPa, with an absolute pressure accuracy of 0.5hPa. The sensor is made up of a piezoresistive pressure sensor with a metal lid and gel encasing, which protects the sensing elements from water and other environmental hazards.

Important to note is that while the LPS28DFW is water-resistant, the rest of the components on these breakouts are not protected by any conformal coating and can be damaged by exposure to liquids. Therefore, users who intend to use these breakouts in applications where the board may be exposed to water or other liquids should apply a conformal coating to the board or place it in a sealed container before use.

The SparkFun Qwiic Connect System is an ecosystem of I²C sensors, actuators, shields, and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

The SparkFun Qwiic LPS28DFW Absolute Digital Barometer has several features including a supply voltage range of 1.7 - 3.6V, current consumption in one shot mode of approximately 1.7 - 32.2µA, and in continuous mode of approximately 2.5 - 783.8µA. It also has an I²C interface (Qwiic-enabled), I²C addresses of 0x5C (Default), 0x5D, and an output data rate range of 1 - 200Hz. The sensor package is water-resistant and has dual pressure ranges. It also includes interrupt features and 2x Qwiic Horizontal Connectors.

Documentation for the SparkFun Qwiic LPS28DFW Absolute Digital Barometer includes a schematic, Eagle Files, board dimensions, datasheet (LPS28DFW), hookup guide, Qwiic info page, LPS28DFW Arduino Library, and GitHub Hardware Repo.