Acquired Electronics360

MEMS and Sensors

Ultra-low Power Biometric Sensors Introduced for Healthcare Wearables

29 November 2017

The Si117x sensors. Source: Silicon LabsThe Si117x sensors. Source: Silicon LabsSilicon Labs has introduced a family of optical biometric sensors targeted at wearable fitness and wellness products that provide advanced heart rate monitoring (HRM) along with electrocardiogram (ECG) capabilities.

The Si117x sensor modules are ultra-low power and of high sensitivity which makes the biometric sensors suitable for smartwatches, patch-type wellness products and other wearables that require long battery life.

The sensors provide all-day HRM which is key to analyzing physiological patterns and detecting health issues before they become problems. The sensors consume less than 50 µA while performing continuous HRM. Also included is built-in buffer and accelerometer synchronization capabilities to save more system-level power.

Each module supports up to four light emitting diodes (LEDs) that can be independently programmable. Additional features include a photodetector, 24-bit ADC with >100 dB dynamic range, I2C and SPI digital interfaces, event interrupt engine, synchronization engine, host communications processor and inputs for two external photodiodes.

To contact the author of this article, email

Powered by CR4, the Engineering Community

Discussion – 0 comments

By posting a comment you confirm that you have read and accept our Posting Rules and Terms of Use.
Engineering Newsletter Signup
Get the Engineering360
Stay up to date on:
Features the top stories, latest news, charts, insights and more on the end-to-end electronics value chain.
Weekly Newsletter
Get news, research, and analysis
on the Electronics industry in your
inbox every week - for FREE
Sign up for our FREE eNewsletter


Date Event Location
12-16 Aug 2018 Vancouver, Canada
11-13 Sep 2018 Novi, Michigan
27 Sep 2018 The Reef, Los Angeles
03-05 Oct 2018 Boston, Massachusetts
26 Oct 2018 Old Billingsgate
Find Free Electronics Datasheets