Overview
The LPS22DF is an ultracompact, piezoresistive, absolute pressure sensor that functions as a digital output barometer. Developed by STMicroelectronics, this device is designed to provide lower power consumption and reduced pressure noise compared to its predecessors. The sensor includes a sensing element and an IC interface that communicates via I²C, MIPI I3CSM, or SPI interfaces. The sensing element, manufactured using a dedicated ST process, consists of a suspended membrane that detects absolute pressure. The LPS22DF is packaged in a full-mold, holed LGA (HLGA) package and operates over a temperature range of -40 °C to +85 °C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Pressure Range | 260 to 1260 | hPa |
| Supply Voltage | 1.7 to 3.6 | V |
| Supply Current @ ODR 1 Hz | 1.7 μA (AVGP = 4), 9.4 μA (AVGP = 128) | μA |
| Pressure Accuracy | ±0.2 hPa | hPa |
| Pressure Noise | 0.34 Pa | Pa |
| Temperature Range | -40 to +85 | °C |
| Output Data Rate (ODR) | 1 Hz to 200 Hz | Hz |
| Interface | I²C, MIPI I3CSM, SPI | |
| Package Type | HLGA-10L (2.0 x 2.0 x 0.73 mm) | |
| High Shock Survivability | 22,000 g | g |
Key Features
- Embedded temperature compensation and factory calibration, eliminating the need for additional calibration during operation.
- Low power consumption with supply current down to 1.7 μA at 1 Hz ODR.
- High-resolution 24-bit pressure data output with selectable averaging and output data rates.
- Support for I²C, MIPI I3CSM, and SPI interfaces, allowing flexible integration with various microcontrollers.
- Embedded FIFO with 128 slots for storing pressure output values, enabling consistent power saving and efficient data handling.
- Interrupt functions including data-ready, FIFO flags, and pressure thresholds, simplifying data synchronization and system management.
- Robust design with high shock survivability (22,000 g) and sensitivity to electrostatic discharge protection.
Applications
- Altimeters and barometers for portable devices
- GPS applications
- Weather station equipment
- Sport watches
- e-cigarettes
- Drones
- Gas metering
Q & A
- What is the pressure range of the LPS22DF?
The LPS22DF measures pressures from 260 to 1260 hPa.
- What are the supported communication interfaces for the LPS22DF?
The LPS22DF supports I²C, MIPI I3CSM, and SPI interfaces.
- What is the typical supply current of the LPS22DF at 1 Hz ODR?
The typical supply current at 1 Hz ODR is 1.7 μA.
- What is the temperature range for the LPS22DF?
The device operates over a temperature range of -40 °C to +85 °C.
- Does the LPS22DF have embedded temperature compensation?
- What is the resolution of the pressure data output?
The pressure data output is 24-bit.
- What is the purpose of the FIFO in the LPS22DF?
The FIFO stores 128 slots of 24-bit pressure output values, enabling consistent power saving and efficient data handling.
- Is the LPS22DF sensitive to mechanical shock and electrostatic discharge?
- What are some common applications of the LPS22DF?
- What is the package type of the LPS22DF?
