STMicroelectronics LPS25HBTR

Overview

LPS25HBTR from STMicroelectronics is a piezoresistive MEMS absolute pressure sensor delivering 24-bit digital barometric output over 260–1260 hPa, with 0.01 hPa RMS resolution in high-resolution mode and integrated temperature compensation. It operates from 1.7–3.6 V, supports I²C/SPI interfaces, and is qualified for -30 to +105 °C - used in portable altimeters, GPS-assisted navigation, and wearable environmental monitoring.

For engineers reviewing the LPS25HBTR datasheet, LPS25HBTR pinout, LPS25HBTR application, or LPS25HBTR equivalent, key selection considerations include its dual-interface flexibility, embedded FIFO for burst sampling, interrupt-driven pressure threshold detection, and 20× overpressure survivability (2 MPa) in compact HLGA-10L packaging.

Technical Context

The LPS25HBTR integrates a dedicated silicon membrane sensing element with on-chip ADC, digital filtering, and programmable resolution control via RES_CONF register. Its pressure data path includes factory-calibrated quadratic temperature compensation and configurable ODR (1–25 Hz), enabling stable readings across industrial temperature ranges without external calibration.

It implements three distinct communication modes: I²C (7-bit address with SA0 pin), 4-wire SPI (with CS-controlled protocol), and 3-wire SPI (SDI/SDO shared). Interrupt logic supports Data Ready, FIFO full/empty, and differential pressure threshold events - all configurable via INTERRUPT_CFG and INT_SOURCE registers.

Key Specifications

Pinout & Package

HLGA-10L (2.5 × 2.5 × 0.76 mm typ.) is a holed land-grid array package enabling ambient pressure access to the MEMS diaphragm. The exposed cavity requires proper PCB venting design and conformal coating avoidance over the aperture.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar absolute pressure sensing applications.

Compared with BMP280TR, LPS25HBTR offers superior FIFO management and pressure-threshold interrupts for autonomous edge processing; compared with LPS22HBTR, it trades minor noise/ODR gains for proven field reliability and broader temperature qualification (-30 to +105 °C).

Availability

LPS25HBTR is available at Aetrix Electronics and suitable for portable altimeters, GPS-assisted navigation systems, and weather station equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LPS25HBTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and analog components for industrial, automotive, and consumer markets.

The LPS25HBTR belongs to ST's MEMS pressure sensor product line, engineered specifically for high-accuracy, low-power barometric and altimetric applications in space-constrained, battery-operated devices.

FAQ

What is the recommended PCB layout practice for the LPS25HBTR's pressure port?

The HLGA-10L package features an underside vent hole aligned with the MEMS diaphragm. PCB layout must include an unobstructed cavity beneath the device - no solder mask, silkscreen, or copper fill over the aperture. A minimum 1.5 mm diameter vent opening to ambient air is required, with clean airflow path and no conformal coating intrusion.

How does the LPS25HBTR handle temperature-induced pressure drift?

It uses factory-programmed quadratic temperature compensation applied in real time to raw pressure data. This achieves ±0.2 hPa absolute accuracy over 0–80 °C after one-point calibration (OPC) in-system, and ±1 hPa before OPC. No external thermistor or lookup table is needed.

Can the LPS25HBTR operate in both I²C and SPI modes simultaneously?

No. Interface selection is hardware-controlled via the CS pin: CS = HIGH enables I²C and disables SPI; CS = LOW enables SPI and disables I²C. The device cannot arbitrate or switch protocols dynamically during operation - mode must be fixed at power-up.

What FIFO modes are supported, and how do they affect power consumption?

It supports Bypass, FIFO, Stream, Stream-to-FIFO, Bypass-to-Stream, FIFO Mean, and Bypass-to-FIFO modes. Power use remains constant at 4.5 μA in Low Current & Noise mode regardless of FIFO configuration - the FIFO buffer draws no additional current beyond base mode, making it ideal for energy-constrained edge nodes.