What this sensor does on the board
The STMicroelectronics LPS22DFTR is a 24-bit absolute pressure sensor in a 10-HLGA package, communicating over I2C or SPI. It measures barometric pressure from 3.77 PSI up to 18.27 PSI (26 to 126 kPa) with a rated accuracy of ±0.007 PSI (±0.05 kPa). That 24-bit resolution gives you fine altitude steps for drone barometers, weather stations, or portable altimeters — the digital output goes straight to an MCU without an external ADC.
The temperature-compensated feature keeps the pressure reading stable across that span — no external compensation lookup table needed. Storage temperature exceeds the operating range, so the part survives shipping and storage without issue.
The LPS22DFTR is an active, current-production part from STMicroelectronics, ROHS3 compliant. No last-time-buy or obsolescence risk at this point.
