PS9121-A

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Optoisolators are electronic devices used to isolate two circuits from one another for safety and security purposes. Technically, an optoisolator is a light dependent resistor (LDR). This component must be able to work with various amounts of light, from extremely bright to very dim. There are two basic categories of optoisolators – logic output and relay output. This paper will discuss the application field and working principle of one type of logic output optoisolators – the PS9121-A.

PS9121-A logic output optoisolators are designed to increase system security and noise isolation on data transfers, as well as to reduce the probability of physical electrical contact with sensitive circuitry. They provide a link between line signals and logic circuits at voltages up to 28 volts including digital IC logic, coaxial cables and large-scale IC buses. PS9121-A logic output optoisolators can help protect against line-to-ground shorts, line overvoltages, electromagnetic and radio frequency interference, and electrostatic discharges.

The PS9121-A is a fast, monolithic optocoupler with an 800 Mbps data rate, a 1 MHz clock rate, and a high common mode transient immunity of 30 kV/us. It consists of a GaAlAs light emitting diode (LED) coupled to an integrated photo detector. This integrated photodetector consists of two independent open collector outputs driven by one light emitting diode (LED). Each output has an individual light emitting diode (LED) current control pin which is designed to maintain the device’s forward current matching and the output amplitude.

The PS9121-A optoisolator is designed to transfer digital signals between two isolated circuits using a light emitting diode (LED) and photodetector combination. This allows each isolated circuit to be electrically isolated from the other, ensuring that no voltage leakages or ground shorts occur. The PS9121-A employs an open collector design, where the collector is connected to the LED and will pull the voltage down to zero volts when the LED is activated. This makes it ideal for low voltage logic and digital applications.

When connected to a power supply, the incoming voltage causes the LED to turn on and the optical signal to be transferred to the photodetector. The photodetector then converts the optical signal into electrical signals, which are then amplified and made available at the output. If the incoming voltage is removed, the LED shuts off and the output will revert back to a low voltage.

The PS9121-A logic output optoisolator is suitable for a variety of applications, such as in digital signal processing and 0-10V circuits. It is also perfect for use in embedded control systems, providing a robust and secure connection between physical components and microcontroller boards. The device is also easy to install, featuring an integrated mounting tab.

In summary, the PS9121-A logic output optoisolator is an ideal device for isolation of digital signals and protecting sensitive circuits from excessive electrical contact. It provides high speed data rates, low voltage logic, and a high common mode transient immunity. The PS9121-A is perfect for embedded control systems, digital signal processing, and 0-10V circuits.

The specific data is subject to PDF, and the above content is for reference