PS9821-2-A

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Optoisolators, also known as optocouplers or photocouplers, are used in aerospace, automotive, medical, and industrial applications where electrically isolated digital signals are present. The PS9821-2-A, which belongs to Logic Output optoisolator family, offers improved insulation performance and low power consumption for wide range of applications.

The PS9821-2-A optoisolator is a single channel, low-cost, high-reliability device with an LED input and open collector output structure. It offers a maximum working voltage of 30V and minimum isolation voltage of 2kVrms. The output is clamped to VDD+3V. The LED close to the coupler detector is driven through a voltage of 1.2V and the current of 5mA. During the turn-on time, the output voltage reaches saturation in 200 μs, while the turn-off time is less than 20 μs. The device incorporates advanced optical design and caters to a wide range of standard logic output applications.

The PS9821-2-A optoisolator provides several important features to deliver reliable logic output. Built-in suppression of cross-talk due to LED to output coupled spikes prevents the signal from being transmitted from one channel to the other. The high-isolation voltage feature ensures no electrical connection between power supply and logic signals, reducing erroneous signals and ensuring noise immunity of the system. The thermal protection circuit monitors the device\'s temperature and controls the over-temperature status of the output IC. Reverse-voltage protection is also achieved using a full rectification circuit.

The PS9821-2-A optoisolator is usually employed in sensor and interface applications. The logic output family devices are used to electrically isolate and input and output of a system. The device provides reliable isolation of any logic level digital signal for communication purposes, such as LCD drivers, networking, and a variety of industrial control systems. In addition, the device can be used in medical and automation applications that require protection from harmful environments, such as medical breathalyzers and health monitoring systems.

The PS9821-2-A optoisolator is also widely used in automotive applications. It is used to isolate and control signals, such as motor control and the powertrain system. The device can also provide a superior performance for safety functions, including the control of rear view cameras, headlamp assemblies, turn signal lighting, as well as parking brake sensors.

In summary, the PS9821-2-A optoisolator is a reliable, low-cost, and high-performance device designed to provide isolation of digital signals in a wide range of applications. The device offers excellent electrical, thermal and mechanical properties, making it ideal for industrial control and automotive applications. Its superior performance and wide operating temperature range make it a cost-effective solution for sensing and sensor interface applications.

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