SFH 213

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Optical sensors are devices which detect and measure light by using the photovoltaic effect. Photodiode sensors rely on the photovoltaic effect to convert light energy into electric current. A photodiode is constructed of a semiconductor material, such as silicon, in a p-n junction. Photodiodes are widely used as photosensitive elements in a variety of applications, from light sensing to sound detection. The SFH 213 photodiode is one of the most popular optical sensors on the market today, owing to its robust characteristics and relatively small size.

The SFH 213 photodiode is a p-i-n, silicon, reverse bias-integrated photodiode. It features a low reverse saturation current of 50 A, a low dark current of 0.3 A and a maximum reverse voltage of 15 V. With its high operation temperature of up to +85C, the SFH 213 is suited to harsh environments. In terms of size, the detector measures 2.6 mm x 1.3 mm x 1.1 mm making it one of the smallest single diode packages available. The SFH 213 also displays excellent spectral and radiation sensitivity performance, with a peak sensitivity wavelength of 965 nanometers (nm). A package of the SFH 213 consists of one twin soic flat and one accessory diode, making it an easy to use and cost-effective solution.

The working principle of a photodiode is based on the photovoltaic effect. When light strikes the photodiode, photons of varying energies are absorbed by the semiconductor material. These photons create electron/hole pairs, which are carried by drift and diffusion. The voltage difference between the electron and hole transport currents is what produces the desired electric current. The detection and measurement of this electric current is what enables the SFH 213 photodiode to perform its optical sensing capabilities.

The SFH 213 photodiode is a versatile and cost-effective optical sensing solution for a variety of applications. Due to its small size, the SFH 213 is particularly well suited for applications in constrained spaces, such as wearables and consumer electronics. Furthermore, its wide temperature range of -40C to +85C and high speed 400 nA/W makes the SFH213 well suited for various outdoor uses. Additionally, its high reverse voltage of 15V and excellent spectral and radiation sensitivity means it can be used for both analog and digital applications.

The SFH 213 photodiode is used in a variety of different applications, such as light detection, sound detection, thermal sensing, motion sensing, and medical imaging. Due to its robust characteristics and small size, the SFH 213 can be used in applications that require a compact optical sensing solution. For example, the SFH213 is commonly used in industrial applications such as machine vision, quality control, and factory automation. Additionally, owing to its cost-effectiveness, the SFH 213 is also used in consumer applications such as security systems, game controllers, and automotive lighting.

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