Photodiodes

Photodiodes are used in an array of every day electronic devices such as camera's, smoke detectors, burglar alarms, safety equipment, medical applications, CD players and surveying instruments to name a few.

What is a photodiode?

They are used as light sensors or detectors. When light reaches a photodiode, this is converted to electrical energy in the form of an electric current. The photocurrent that is produced is proportional to the amount of light. Photodiodes can also be known as photosensors, photodetectors and light detectors.

Photonic applications use the photon in the same way as electronic applications use the electron. There is usually a small amount of electric current that flows through these photosensitive devices even when no light (photons) are entering it. This is known as dark current.

What are the different types?

The PN photodiode was the first to be developed, it is not so widely used these days due to their relatively low performance compared to newer technologies.

The PIN photodiode has a wider surface area and allows for more light photons to be collected, as well as having a lower capacitance. It is the most widely used diode today.

Avalanche photodiodes are used in areas where there is low light, it operates under a high reverse bias condition. The higher the reverse voltage, the higher the gain.

Schottky photodiode is based on the schottky diode, or shottky barrier diode. It provides additional functions over others, particularly with regards to high speed and long wavelength detection.

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Omschrijving Prijs Spectrums Detected Wavelength of Peak Sensitivity Package Type Mounting Type Number of Pins Diode Material Minimum Wavelength Detected Maximum Wavelength Detected Typical Fall Time Length Width Height Angle of Half Sensitivity Automotive Standard
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Infrared 970nm TO-5 Through Hole 2 Si 350nm 1100nm - - - 0.18in - -
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Infrared, Visible Light 850nm T-1 3/4 Through Hole 2 Si 750nm 1100nm - 5.9mm 4.8mm 9mm 20 ° -
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Infrared 940nm - Surface Mount 4 Si 790nm 1050nm - 4.2mm 5mm 1.08mm 65 ° -
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13,49 €
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Infrared 900nm TO-5 Through Hole 2 Si 350nm 1100nm - - - 0.13in - -
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Infrared, Visible Light 920nm TO-5 Through Hole 2 Si 400nm 1100nm - 9.1mm 9.1mm 3.1mm 50 ° -
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FabrikantVishay
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- - T-1 3/4 Through Hole - - - - - 8.6mm 5mm - - -
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Infrared, Ultraviolet, Visible Light 850nm TO-18 Through Hole 2 Si 350nm 1100nm - 5.6mm 5.6mm 5.5mm 40 ° -
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Infrared, Ultraviolet, Visible Light 850nm DIP Through Hole 2 Si 350nm 1100nm - 4.5mm 4mm 2.2mm 60 ° -
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Infrared 1100nm Chip LED Surface Mount 2 Si 300nm 1100nm 0.12µs 2mm 1.25mm 0.8mm 70 ° -
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FabrikantnummerBP 104 S-Z
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Infrared, Visible Light 850nm DIP Surface Mount 2 Si 400nm 1100nm - 4.5mm 4mm 1.2mm 60 ° -
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Infrared 970nm TO-5 Through Hole 2 Si 350nm 1100nm - - - 0.18in - -
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