LPS28DFW STMicroelectronics In Stock
The LPS28DFW is a dual full-scale absolute digital barometer from STMicroelectronics, covering pressure ranges up to 1260 hPa and 4060 hPa in a water-resistant package with a digital output interface. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- —
- Pin Count
- 999
- Lifecycle
- ACTIVE
- Datasheet
- LPS28DFW Datasheet PDF
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual full-scale pressure measurement supporting both 1260 hPa standard barometric range and 4060 hPa extended range for underwater or high-pressure applications
- Water-resistant package construction protects the sensor from moisture ingress in wearables, outdoor, and marine environments
- Absolute digital output eliminates external ADC requirements and simplifies host MCU firmware for altitude and depth sensing
Applications
The LPS28DFW suits altitude-tracking wearables and GPS-assisted navigation devices that need accurate atmospheric pressure readings within the 1260 hPa standard barometric range. Its extended 4060 hPa full-scale range and water-resistant package make it well suited for dive computers, underwater robotics, and pool-depth monitoring applications. The digital output interface integrates directly with low-power microcontrollers in IoT weather stations and portable medical respiratory monitoring equipment.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the two pressure full-scale ranges available on the LPS28DFW and which applications benefit from each?
The LPS28DFW provides a standard 1260 hPa range for atmospheric barometric altimetry in weather stations and wearables, and an extended 4060 hPa range for underwater depth measurement in dive computers and pool-depth sensors. The 4060 hPa scale corresponds to water depths approaching 30 meters, enabling certified consumer-dive applications at a pressure of approximately 400 kPa absolute.
How does the water-resistant package of the LPS28DFW compare to a standard MEMS barometer package in outdoor product designs?
Standard MEMS barometers use open-cavity packages that expose the pressure port directly to ambient air, making them susceptible to water ingress during rain or washing. The LPS28DFW's water-resistant construction seals the package against liquid while still permitting gas-pressure transmission, allowing IPX7 or IPX8 rated products to integrate a barometer without a separate protective gel-filled housing, saving assembly cost and up to 2 mm of vertical board clearance.
Which digital interface does the LPS28DFW use, and how does that simplify firmware integration on a 3.3 V microcontroller?
The LPS28DFW provides a digital output using standard I2C or SPI communication at 3.3 V logic levels, allowing direct connection to most modern microcontrollers without level shifters. Reading a pressure sample requires only a few register transactions, and the absolute digital output format means no external 16-bit ADC or bridge conditioning circuit is needed, reducing firmware complexity and BOM count.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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