Introducing the latest innovation in technology, the MEMS pressure sensor for wearables has been launched by STMicroelectronics. This state-of-the-art sensor, known as the LPS27DEWO, is tailored for next-generation wearable devices, smartwatches, and sports action cameras. The evolution of consumer electronics demands tools that accommodate diverse environments, challenging hardware designers to incorporate functionality for both high-altitude mountain trails and deep underwater explorations without increasing logistical costs or device dimensions.
Dual-Range Capabilities
Traditionally, monitoring both barometric altitude and underwater depth required two distinct sensors, each with unique pressure ranges. The LPS27DEWO integrates these capabilities into a singular compact package. Measuring a mere 2.7 by 2.7 millimeters, with a height of just 1.7 millimeters, this sensor offers dual selectable full-scale modes. The primary mode supports a range from 260 to 1260 hectopascals, suitable for altimetry and weather predictions, while the extended mode reaches up to 6060 hectopascals, perfect for aquatic depth measurements.
Underwater Excellence
In underwater scenarios, the MEMS pressure sensor for wearables proficiently measures depths beyond 50 meters, surpassing the 40-meter recreational diving limit. Its cylindrical metal lid package caters to simpler O-ring sealing and guarantees extreme mechanical resilience, tolerating overpressure corresponding to 110 meters of water depth without errors.
Enhanced Design Features
Key advancements include its low pressure noise performance and full-scale accuracy within plus or minus 0.5 percent. To negate any potential sunlight interference that might alter sensor readings, STMicroelectronics employs a unique black potting gel. This not only blocks photon penetration but also shields against chlorine, bromine, and saltwater corrosion.
Energy Efficiency and Accessibility
The sensor is also engineered for devices with limited battery life, drawing only 1.7 microamperes of power. Multiple digital interfaces, such as I2C, SPI, and MIPI I3C, are supported by the sensor, which is now available in mass production at approximately 2.18 US dollars per 1,000 units order.
