Vishay Intertechnology Improves Bio Sensor Performance for Wearables with a High Speed PIN Photodiode

By Chad Cox

Production Editor

Embedded Computing Design

March 18, 2021


Vishay Intertechnology, Inc. expanded its optoelectronics portfolio with the introduction of a new high speed silicon PIN photodiode with enhanced sensitivity to visible and infrared light.

Featuring a rectangular top-view surface-mount package with only a 0.48 mm profile, the Vishay Semiconductors VEMD8081 offers increased typical reverse light current of 33 µA for improved bio sensor performance in wearable devices and medical applications.

The VEMD8081 offers 15 % greater reverse light current than its predecessor while maintaining the same package dimensions. This provides a drop-in replacement that can improve performance by increasing signal output, or extend battery life by reducing LED current.

For heart rate measurement in wearable devices the VEMD8081 has increased sensitivity thus enabling more accurate measurements. The rectangular shape maximizes the area of the photodiode eliminating the wasted area typically found in square photodiodes. This device is ideal for SpO2 measurement in medical monitors.

The VEMD8081 utilizes Vishay's proven wafer technology to detect visible and near infrared radiation over a wide spectral range from 350 nm to 1100 nm. For high sampling rates, the device offers fast switching times and low capacitance of 50 pF.

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Chad Cox. Production Editor, Embedded Computing Design, has responsibilities that include handling the news cycle, newsletters, social media, and advertising. Chad graduated from the University of Cincinnati with a B.A. in Cultural and Analytical Literature.

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