Proving the Business Case for the Internet of Things

Fujitsu integrates Maxim heart rate sensor in smartphone

Steve Rogerson
March 19, 2019

Californian electronics company Maxim Integrated has announced that its Max 30101 heart-rate sensor has been integrated into the F-01L Raku Raku smartphone from Fujitsu.
The Japanese smartphone, which measures heart rate and sleep patterns, can be used for applications such as pedometers. With the Max 30101, the smartphone can also measure stress levels and arterial aging (the aging of blood vessels). Popular for seniors, it has been designed so that even those who are using a smartphone for the first time can use it comfortably.
“It is our great pleasure to have our Raku Raku smartphone F-01L equipped with the Max 30101,” said Naohide Kushige, general manager of Fujitsu Connected Technologies’ product division. “This adoption has enabled the acquisition of new vital-sign data, leading to further improvement of applications in the F-01L to support users’ health. We expect it to make people more conscious about health and help them lead a healthier life.”
The sensor enables accurate measurements of vital signs using algorithms produced by Fujitsu. It is part of Maxim’s family of biosensor products for health-related use cases. Algorithms integrated into the F-01L enable heart-rate monitoring only; pulse oximetry is not enabled.
By integrating various functions, the module provides a complete system to ease the design-in process for mobile and wearable devices. In addition, it operates on a single 1.8V power supply and a separate 5V power supply for the internal LEDs.
The module can be shut down through software with near-zero standby current, allowing the power rails to remain powered at all times. Communications are through a standard I²C-compatible interface, and it operates over the -40 to +85˚C temperature range.
“The adoption of the Max 30101 into this popular smartphone is a significant step towards extending important vital-sign measurement functions to a wider population,” said Andrew Baker, managing director of Maxim’s industrial and healthcare business unit. “By empowering smartphone users with mobile access to healthcare data, our technology is enabling a healthier world.”
Available in a 5.6 by 3.3 by 1.55mm 14-pin optical module, the sensor’s programmable sample rate and LED current provide less than 1mW operation for mobile devices and have a typical shutdown current of 0.7µA.
It is said to be easy to implement due to the integration of internal LEDs, photodetectors, optical elements and low-noise electronics with ambient light rejection.