SI8422BD-D-ISR

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Digital isolators are used to provide galvanic isolation between two circuits. The SI8422BD-D-ISR is a high performance, low power, isolated digital optocoupler and its application field and working principle can be explained as below.

The SI8422BD-D-ISR digital isolator can be used in variety of end equipment, such as motor drives, power supplies, communication systems, digital I/O control modules, sensing and signal conditioning systems, hand held medical instruments and industrial measurement instruments. In addition, this device can be applied in areas that require FCC part 15, type B emissions and European EN55032, CISPR32 class B standards.

The working principle of the SI8422BD-D-ISR is based on an optocoupler consisting of an infrared LED and an integrated phototransistor. The LED, which serves as a light emitting device, is on one side of the isolation barrier and the phototransistor, which is a light receiving device, is on the other side of the barrier. When the LED is powered, photons are produced and these photons are detected by the phototransistor on the other side and this results in a transfer of signals across the optical barrier in isolation from each other.

The SI8422BD-D-ISR can provide a high level of isolation voltage of up to 3000VRMS. It can also provide a bandwidth of up to 1 MHz and a transmission rate up to 5 MBps. It is also capable of providing an energy transfer of up to 2.5mW within a 0.1% operating current range. The isolation barrier also has a low leakage current of only 10nA at 30V. Furthermore, the digital isolator is RoHS compliant and has short circuit protection.

In conclusion, the SI8422BD-D-ISR is an excellent choice for a digital isolator. It has a wide range of application fields, offers a high level of isolation voltage, has a wide bandwidth and a high transmission rate, and has a low energy transfer with a low leakage current. Additionally, the digital isolator is RoHS compliant and offers short circuit protection.

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