SI8235AB-D-ISR

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The SI8235AB-D-ISR is a series of industrial isolators made by Silicon Labs. This article will discuss the application field and working principle of this device.The SI8235AB-D-ISR is part of a family of isolators designed for the industrial sector, specifically for industrial automation, telecommunications, and motor control applications. It comprises of four chips: the silicon germanium (SiGe) driver, the low power Schottky bootstrapped driver, the high side driver, and the isolated differential receiver. Together, these components enable the SI8235AB-D-ISR to provide isolation up to 100 Vrms and to operate from a supply voltage that ranges between 1.2 V and 5 V.The SiGe driver is a four-channel isolation interface consisting of two channels of both differential input receivers and single-ended, high side drivers. It allows the input signal to be isolated from both the high side and low side of the signal allowing for electrically isolated communications with equipment components in harsh industrial environments. The low power Schottky bootstrapped driver is a high side, CMOS-compatible driver that offers an added level of isolation and reduces power consumption. Additionally, it ensures reliability despite higher temperatures and other environmental factors.The high side driver is a single-channel, isolated output driver. It is designed to drive high-voltage outputs and can operate both grounded and floating loads. It also contains a wide range of modern protection features for overtemperature shutdown and undervoltage lockout. The isolated differential receiver allows for a low-power, isolated, full-duplex serial transmitter/receiver interface.In addition to the above components, the SI8235AB-D-ISR also includes a unique I2C bus-based configuration, which provides for a simplified yet powerful software-controlled feature set. This configuration allows engineers to precisely configure various operations, such as the reference current level, the slew rate current limit, fall/rise times, driver output current limitation, and remote shutdown control.Overall, the SI8235AB-D-ISR is a highly integrated, efficient, and reliable industrial I/O interface solution designed for a wide range of industrial automation, transportation, motor control, and telecommunications applications. With its integrated isolation scheme, it offers improved signal integrity, improved bandwidth, and low power consumption. Its I2C-based configuration ensures that the device can be configured to meet a wide range of application requirements.

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