Proving the Business Case for the Internet of Things

Vishay adds heart-rate monitoring to any device

Steve Rogerson
November 13, 2018

Pennsylvania-based semiconductor company Vishay Intertechnology says it can help manufacturers add a heart rate monitoring capability to any type of consumer electronic device.
Vishay will demonstrate the capability at this week’s Electronica show in Munich with a fitness watch prototype that uses optoelectronic components to enable the heart rate monitor function with a software algorithm developed by Elfi-Tech, an Israel-based developer of non-invasive medical devices.
With this capability, Vishay is creating an opportunity for companies that don't have proprietary software and hardware for heart rate monitoring to add the capability to their products with a relatively low cost of entry. Together Vishay and Elfi-Tech can supply a complete reference design for the heart rate monitoring capability, including digital and analogue front-end components.
Vishay optoelectronic components in the fitness watch on view at Electronica include the VEMD5080X01 pin photodiode and VLMTG1400 LED. The VEMD5080X01 is a surface-mount device that eliminates optical cross talk. It is sensitive to visible and infra-red light from 350 to 1100nm and comes in a package measuring 7.5 by 7.5 by 0.9mm.
The VLMTG1400 LED has a peak wavelength in the green spectrum at 525nm and features typical intensity of 1400mcandela. It is packaged in a 0603 surface-mount format with a height of 0.55mm.
Elfi-Tech provided the software and the non-optical hardware of the fitness watch, including an Arm Cortex-M3 microcontroller, a Texas Instruments analogue front-end for heart rate monitoring, Bluetooth Low Energy connectivity and a mems-based accelerometer. The output is transmitted to an Android application.
Vishay Intertechnology is a manufacturer of discrete semiconductors (diodes, mosfets and infra-red optoelectronics) and passive electronic components (resistors, inductors and capacitors). Elfi-Tech specialises in non-invasive measurement of physiological parameters using proprietary optical sensors and algorithms.