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4.8×2.5mm PIN photodiode with enhanced sensitivity for visible light

4.8×2.5mm PIN photodiode with enhanced sensitivity for visible light

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By eeNews Europe



The chip offers fast switching times and a low capacitance of 47 pF for precise signal detection in wearable devices and medical applications.

With a radiant-sensitive area measuring 4.5mm² and high radiant sensitivity with a reverse light current of 28µA and dark current of 0.2nA, the device uses Vishay’s proven wafer technology to detect visible and near infrared radiation over a wide spectrum range from 350nm to 1100nm. For green LEDs, the VEMD8080’s sensitivity represents a 30% improvement over the standard technology in previous-generation solutions.

When used with green LEDs, such as Vishay’s VLMTG1400, the photodiode’s small size and high sensitivity enable slim sensor designs for optical heart rate detection in wearable devices such as fitness trackers and smartwatches. In these devices, the VEMD8080’s rectangular shape allows several light emitting diodes to be placed close to the radiant sensitive area to maximize the signal. When combined with 660nm and 940nm dual color emitting diodes, the photodiode is suitable for SpO2 measurement in medical monitors.

The VEMD8080 features a ± 65° angle of half-sensitivity, operating temperature range of -40 to +85°C, and 950nm wavelength of peak sensitivity.

Vishay Intertechnology – www.vishay.com

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