SDP8476-201

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Optical sensors - phototransistors - are used to detect a variety of light sources, from sunlight to near-infrared and beyond, depending on the type of semiconductor material used. In this article, we’ll discuss the SDP8476-201 phototransistor, its application fields and working principle.

Overview of SDP8476-201

The SDP8476-201 is a phototransistor that is used for optical sensing in numerous industries. It is a small device with a miniature flat back that makes it easy to install in tight places. Its package size is only 25°x80°x19°, and it is typically in a package of TO-66. The device\'s lead formation is a standard SER-gate formation.

The SDP8476-201 operates over a wide range of temperatures ranging from -40°C to 100°C. It can be used for high-speed response, operating even at frequencies up to 1 MHz, making it suitable for applications with fast response times. The device has an optical threshold voltage, a transistor gain, and a light-to-voltage conversion ratio of 200 V/W.

Application Fields of SDP8476-201

The SDP8476-201 is generally used for optical sensing in a variety of industries. It is an ideal solution for detecting changes in light levels in mechanical and electrical instrumentation. It is often used in precision measurement, such as capturing small changes in reflected light pulses from objects.

The device is also used in medical technologies, particularly for photoplethysmography (PPG) applications. In these uses, it helps measure blood oxygen saturation and the volume of pulsating blood vessels.

The SDP8476-201 is also used in image recognition and object detection. In these applications, it helps to differentiate between objects or to detect the presence of objects. It can be used to increase the accuracy of vision sensors by recognizing or detecting motion or movement.

Working Principle of SDP8476-201

The SDP8476-201 operates by detecting and amplifying light signals. It converts the optical signals to an electrical signal so they can be processed and used in the desired application.

The light signals are collected by the phototransistor and the device’s base-emitter junction. The amount of current flowing through the device is proportional to the amount of light that is being collected. This current signal is then amplified by the transistor and used as the output.

The SDP8476-201 has a low current gain of 200V/W, meaning that it can be used to detect low levels of light. The sensitivity of the device can be adjusted by changing the parameters of the AC drive signals that are applied to the transistor.

Conclusion

The SDP8476-201 is a phototransistor that can be used for a variety of applications. It is used in precision measurement, medical technologies, image recognition and object detection. Its working principle involves collecting and amplifying light signals, which are converted to an electrical signal that can be used in the desired application.

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