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Infineon New ISOFACE™ Portfolio of Digital Isolators

Jul 05 2023

Infineon launched the first generation of ISOFACE™ dual-channel digital isolators, which can be widely used in various applications such as servers, communications, industrial SMPS, industrial automation systems, motor control and drives, energy storage systems, and solar inverters.

Digital isolators are the first choice for many modern designs. It features an optimized system bill of materials, saving PCB space, precise timing characteristics, and low power consumption, along with higher common-mode transient immunity, certified insulation lifetime, integrated features, and output enable options.

This new device is based on Infineon’s patented Coreless Transformer (CT) isolation technology, enabling CMTI to exceed 100kV/μs, ensuring high immunity to system noise. It also helps customers reduce system costs and simplify the design process.

In addition, this comprehensive product family offers multiple channel configurations, default fail-safe outputs, variable or fixed input thresholds, and output-enable configurations to meet the needs of different applications. It is pin-to-pin compatible with other suppliers'  portfolios.

Infineon ISOFACE dual channel digital isolators

Source: Infineon

Housed in a narrow-body DSO-8 package, it provides two data channels that can support data transfer rates up to 40Mbps and ensure signal integrity over a wide operating temperature range and over the entire product range. This family of digital isolators can withstand isolation voltages up to 3000VRMS, enabling systems to operate reliably in noisy environments with predictable data communications.

The architecture of this device enables simple and high-power-density designs, providing low power consumption, and precise timing functions to improve system efficiency. There are two default output states, high level, and low level. In addition to this, the device integrates functions such as fault filtering, communication modulation, monitoring, Undervoltage lockout (UVLO), etc., enabling it to achieve robust fail-safe data even in extreme operating environments with high voltage and noise transmission.

The isolation level of this series of products has reached the most stringent device standards such as UL-1577 and IEC 60747-17 (VDE 0884-17) and has obtained system certification such as IEC 62368-1. The product portfolio will expand in fall 2023 with the addition of four-channel digital isolators for industrial and automotive applications.

Digital Isolator With Precise Timing and Low Power Consumption

A digital isolator is a circuit device that can realize the isolation function. Its main function is to isolate the digital signal from the input terminal from the output terminal, so as to avoid electrical interference, noise, and other problems affecting the normal operation of the circuit.

This device uses photoelectric isolation technology or magnetic isolation technology to replace traditional current signals with light or magnetic fields, reducing electrical interference and amplifier distortion that may exist in signal transmission. When there is a signal input at the input terminal, the digital isolator will convert these signals into optical or magnetic signals, and pass the signal to the output terminal through the isolation layer.

However, Infineon ISOFACE™ digital isolators are based on Coreless Transformer (CT) technology to provide strong high-voltage isolation for a wide range of applications. They are the first choice for isolated gate signal transmission as well as isolated communication interfaces such as UART, CAN, and SPI in high-density power designs. Functional isolation can be provided for systems with different ground potentials and level-shifting requirements.

ISOFACE™ digital isolators feature the highest level of robustness due to the reference's highest CMTI, TTL, and CMOS input threshold options (for dual-channel digital isolators), integrated glitch filter, and wide supply voltage range. It reduces system standby power to improve system efficiency. Among other things, the digital isolator features precise timing performance, high propagation delay accuracy, and better channel-to-channel matching to simplify system design and improve efficiency for SMPS applications.


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