H11L2SR2M Isolators

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Optoisolators, also referred to as optical isolators, are used in electrical systems to protect circuits and equipment from external interference, disturbances, and other external electrical hazards. In this article, we will explore the application field and working principle of the H11L2SR2M optoisolator, which belongs to the the family of logic output optoisolators.

H11L2SR2M optoisolators are designed to dramatically improve the signal-to-noise (S/N) ratio and reduce interference from external EMI sources. They are ideal for applications such as medical instruments, alarm systems, and other critical electronic systems that require high levels of protection and isolation. This device provides high isolation voltage of between 3.8KV and 5KV, with a minimum isolation leak current of 0.5mA. It also offers high performance, low power consumption, and wide temperature range of -40℃ to +100℃.

The H11L2SR2M optoisolator is packaged in a compact SSOP2 package, making it ideal for space-constraint applications. This medium-power optoisolator contains an infrared LED, a TMD photo-transistor, and a Darlington output transistor (). It is used to isolate and protect low-level logic signals from high-voltage and high-power systems. It works by using a photodiode to convert optical signals into electrical signals, and then amplifying the input signal via an output transistor.

The H11L2SR2M optoisolator is most commonly used in conjunction with sensors, microcontrollers, and other low-power logic devices. The primary purpose is to provide an electrically isolated connection between two circuits, which prevents damage to sensitive circuits and protects against external noise. This optoisolator is also used to transmit data over long distances, as the LED can overcome any electrical interference that may occur over the transmission line.

The operating principle behind the H11L2SR2M optoisolator is quite simple. When an electrical current is applied to the LED terminal, an optoelectrical signal is generated. This signal is then transmitted across the internal isolation barrier, and is received by the photodiode. The output signal will then be amplified to a higher level by the output transistor, providing the desired protection.

In summary, the H11L2SR2M optoisolator is an ideal choice for applications requiring high levels of protection, such as medical instruments, alarm systems, and other critical electronic systems. This optoisolator provides the user with a reliable connection that is electrically isolated, and it is capable of withstanding high voltages and currents. It also offers excellent signal-to-noise performance and is very easy to use. As such, the H11L2SR2M optoisolator is a great choice for any application that requires protection and isolation.

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