ADUM1402WSRWZ35-RL

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Digital Isolators

ADUM1402WSRWZ35-RL is a digital isolator that provides superior, efficient and reliable galvanic isolation from microcontroller bus system to peripherals. It serves to protect delicate circuits from high voltage and unwanted noise. It prevents current from flowing across the isolation boundary, thus providing electrical safety, data integrity and reliability.

Application Field

ADUM1402WSRWZ35-RL is commonly used in physical security systems, such as access control or industrial automation. Its applications are versatile, from medical equipment to automotive systems, consumer electronics, process automation systems, safety, lighting, and more. As a digital isolator, it also provides digital filtering, isolation and signal conditioning for microcontroller-based control systems. Its status signaling feature enables powerful manifold sensor applications.

Working Principle

ADUM1402WSRWZ35-RL is a transformer-based digital isolator that is based on digital pulse width modulation (DPWM) technology. It is powered by the analog signal on the Primary Side which is then rectified and used to power the digital isolator on Secondary side. In this way, no power is required on the Secondary Side. The digital isolator consists of two optically isolated channels, Primary Side and Secondary Side, with the Primary Side connected to the Microcontroller (MCU) and the Secondary Side connected to the peripherals. The optocoupler provides an isolation barrier, which keeps the MCU from being directly exposed to high-voltage or high-frequency signals from the periphery. The digital isolator’s dedicated DRV keeps the peripherals isolated from the MCU, thus preventing possible faults. It also serves as a noise filter, helping to provide a clean and reliable connection between the MCU and the peripherals.

The digital isolator also includes several other components to ensure a stable communication link and reliable performance. The dual detect feature protects the device from sudden burst of current due to a short circuit at the Secondary Side by automatically disabling the device. It also provides over-temperature protection. The secondary-side circuit features a low saturation voltage, low drive current and an adjustable voltage reference to ensure a reliable operational range.

ADUM1402WSRWZ35-RL is a highly efficient isolator with low power dissipation. It features low propagation and rise times, a wide temperature range of operation, and low power consumption. Furthermore, it is available with various isolation voltage ratings up to 9 kV. These features make it ideal for use in high-performance signal isolation applications.

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