VEMD8082 Silicon PIN Photodiode

Vishay offers their silicon PIN photodiode that brings a higher level of sensitivity in visible and near-infrared wavelengths to biomedical applications. Compared to previous-generation solutions, the VEMD8082 offers an 18% to 20% increase in reverse-light current (depending on wavelength), a decrease in diode capacitance from 50 pF to 46 pF, and faster rise and fall times of 40 ns vs. 110 ns, allowing for higher sampling rates. The device’s small form factor makes it suitable for integration into low-profile devices such as smartwatches.

The high sensitivity provided by the VEMD8082 is particularly important in biomedical applications, such as photoplethysmography (PPG), where the photodiode is used to detect changes in blood volume and flow by measuring the amount of light absorbed or reflected by blood vessels. In such applications, precise measurements are crucial for diagnosing and monitoring conditions such as cardiovascular disease.