70156-4250

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Optical Sensors - Photoelectric, Industrial

Optical sensors (also called photoelectric sensors) are devices used for measuring light levels and analyzing light waves, often for the purpose of detecting the presence of objects. Optical sensors have many uses in industrial automation applications, including motion sensing, positioning, alignment, and presence/absence detection. The 70156-4250 is an optical transceiver that is principally used in industrial communication systems. This article will discuss the 70156-4250 application field and working principle.

Application Field

The 70156-4250 is a high-speed optical receiver for digital communication circuits. It is mainly used in fiber optic communication systems for digital data reception, such as local area networks (LANs), wide area networks (WANs), and fiber distributed data interface (FDDI) systems, among others. It is optimized for the reception of 16Mb/s and 32Mb/s optical digital signals. The70156-4250 has a wide dynamic range of up to -4dBm and a peak receiver sensitivity of -7dBm, enabling it to receive digital data signals over long distances via a single-mode fiber. In addition, the device features a low power consumption level of only 2.25mA.

Working Principle

The 70156-4250 fiber optic receiver incorporates a semiconductor laser diode for the efficient reception of optical data signals. An optical input signal is first received by the device’s photo-sensitive semiconductor laser diode. The photodiode is designed to convert the incident optical signal into an electrical current, which is fed to the device’s transimpedance amplifier. The transimpedance amplifier converts the electrical current into a voltage signal, which is then treated by the gain control circuit. The gain control circuit adjusts the output voltage level before the signal is applied to the comparator, which in turn converts it into a digital signal. The comparator sends the digital signal to the output pin of the receiver for further processing by the communication system.

Conclusion

The 70156-4250 is a reliable yet cost-effective optical receiver designed for use in digital communication systems. Its wide dynamic range and peak receiver sensitivity enable it to correctly receive digital data signals over long distances via a single-mode fiber. The receiver is also temperature-resistant, making it suitable for harsh environments. Above all, its low power consumption level makes it ideal for battery-operated communication systems.

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