SparkFun Micro Pressure Sensor - BMP581 (Qwiic)

The SparkFun Qwiic BMP581 Pressure Sensor is a micro-sized, absolute pressure sensor breakout from Bosch Sensortec. The BMP581 boasts exceptional resolution and accuracy (down to 1/64Pa) and uses on-chip linearization and temperature compensation to provide true absolute data for pressure and temperature. This version of the BMP581 Pressure Sensor is in the smallest Qwiic form-factor yet, the Qwiic Micro. These breakouts measure just 0.75in. by 0.30in. to make it so you can install these sensors in projects with exceptionally tight spaces.

The BMP581 has a wide pressure-sensing range (30 to125 kPa) with excellent accuracy across the sensing range (±0.5hPa (max), as well as output data rates up to 622Hz (we have only regularly achieved 500Hz in testing, though). The sensor includes a configurable oversampling setting, FIFO buffer for storing up to 32 pressure samples, programmable low-pass filtering, and even 6-bytes of user-programmable non-volatile memory. All of this allows you to customize the performance based on your application's requirements. Even without low-pass filtering, the BMP581 has very low noise (< 0.1Pa RMS). The Qwiic Micro Pressure Sensor communicates over I²C, utilizing our handy Qwiic Connect System, so no soldering is required to connect it to the rest of your project. Sorry SPI users, there is no space on this Micro-sized breakout for any extra pins for that communication protocol. If you prefer a soldered connection or SPI, the Standard Qwiic version of this board features those options.

The sensor has five operating modes: Normal, Forced, Continuous, Standby, and Deep Standby. Deep Standby consumes the least amount of current at just 1.5µA (typical) and peak current consumption by the sensor is 260µA.

Note: Although this board is called "SparkFun Micro Pressure Sensor," the name only refers to the size of the board and not its sensing precision capabilities. If you are looking for a "MicroPressure" sensor calibrated to sensing pressure ranges of 1-25psi from liquid media, check out the SparkFun Qwiic MicroPressure Sensor instead!

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.

Qwiic Micro is our smallest I²C-supported board form-factor yet! At only 0.75in. by 0.30in. (or 24.65mm by 7.62mm for metric friends), Qwiic Micro is perfect for projects and applications that have space or weight concerns. With just a single Qwiic connector, Micro boards work great alongside the Qwiic Multiport or at the end of a Qwiic daisy chain.

Features:

• Qwiic Micro Sized Board (0.75in x 0.30in / 19.05mm x 7.62mm)
• Supply Voltage Range: 1.65V - 3.6V
• Current Draw:
  • 260µA - Max draw during measurements
  • 1.3µA - at 1 Hz in Low Power Mode
  • 0.55µA - Absolute minimum in Deep Standby mode
• Data Transfer Rates:
  • I²C - 1MHz
• 6-bytes of Non-Volatile Memory
• Pressure Sensing Range: 30 - 125kPa
• Pressure Data Resolution: 1/64Pa
• Absolute Pressure Accuracy: ±0.5hPa
• Temperature Sensing Range: -40 - 85 °C
• Output Data Rate: 0.125 - 240Hz (Normal Mode)
• Max Output Data Rate: 622 Hz (Continuous Mode, 1x Oversampling)
• I²C Address: 0x47 (Default), 0x46 (Alternate)
• 1x Horizontal Qwiic Connection Port

Documents:

• Schematic
• Eagle Files
• Board Dimensions
• Hookup Guide
• Datasheet (BMP581)
• Qwiic Info Page
• Arduino Library
• GitHub Hardware Repo

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