RobustISO Family of Dual-Channel Digital Isolators from Diodes Incorporated Enhances Safety and Reliability in High-Voltage Systems

Key Terms

digital isolators technical

Digital isolators are electronic components that let two parts of a device exchange digital signals while keeping their electrical systems physically separate, like a translator passing notes through a wall so the rooms don't touch. They matter to investors because they improve product safety and reliability, help meet regulatory and industry standards, enable higher performance in power and industrial equipment, and therefore can drive demand and pricing power for chipmakers who supply them.

capacitive isolation barrier technical

A capacitive isolation barrier is an electrical design feature that separates high-voltage and low-voltage parts of a device by passing signals through an electric field instead of direct metal connections, like a window that lets information through but keeps a flood of electricity out. Investors care because this kind of barrier affects product safety, regulatory approvals, warranty and liability risk, manufacturing cost and reliability—factors that influence market access and a product’s commercial success.

on-off keying (ook) modulation technical

On-off keying (OOK) modulation is a basic method for sending digital information over a radio link by turning a carrier signal on to represent a “1” and off to represent a “0,” much like Morse code using flashes of light. It matters to investors because this simple choice affects a product’s battery life, range, data speed and regulatory compliance, so it can influence device cost, performance and competitiveness in markets for wireless or connected products.

electromagnetic-interference (emi) technical

Electromagnetic interference (EMI) is unwanted electrical noise or stray signals that disrupt the normal operation of electronic devices and systems. Like static on a radio that makes music hard to hear, EMI can cause malfunctions, safety issues or product failures and often leads to recalls, higher design and compliance costs, or lost sales—factors investors track because they affect a company’s reliability, regulatory standing and profitability.

PLANO, Texas--(BUSINESS WIRE)-- Diodes Incorporated (Diodes) (Nasdaq: DIOD) announces the API772x RobustISO™ products, a series of high-performance dual-channel digital isolators, thus commencing the company’s launch of their isolation devices. These devices are specifically designed to provide a reliable and robust isolation solution for digital signals in critical applications—addressing rising demands in areas such as industrial automation, new energy power systems, and data center power supplies.

The API772x digital isolators are engineered to meet reinforced and basic isolation requirements across various standards, including VDE, UL, and CQC. They offer a 5,000V_RMS isolation rating for one minute, per UL 1577, and feature an 8,000V_PK isolation rating, per DIN EN IEC 60747-17 (VDE 0884-17), with a maximum surge isolation voltage of 12,800V_PK. This level of isolation represents a significant differentiation with a higher breakdown voltage exceeding 12kV, compared to less than 10kV for comparable products.

The capacitive isolation barrier employed in these devices, which has a thickness greater than 25µm, is predicted to have an operational lifetime of over 40 years*. This exceeds the standard service life required in stringent conditions. The longevity is achieved through an ON-OFF keying (OOK) modulation scheme that transfers digital data through the capacitive isolation barrier.

These new RobustISO digital isolators support data rates of up to 100Mbps, providing a versatile solution that can accommodate various transmission protocols. The devices feature strong electromagnetic immunity and low emissions, highlighted by a minimum 150kV/µs common-mode transient immunity (CMTI). This powerful anti-electromagnetic-interference (EMI) capability ensures more reliable signal transmission, which is particularly crucial in environments prone to electrical noise.

The API772x series operates over a wide supply voltage range of 2.5V to 5.5V and features low-power consumption, typically drawing 2.1mA per channel at 1Mbps. They also offer a low propagation delay of 11ns (typ.), ensuring timely signal transferring. The devices provide flexibility in digital channel-direction configurations and default output levels. For instance, the API7720 has both channels in the same direction, while the API7721 and API7722 have channels in opposite directions. Devices with the “F” suffix default to a low output, and those without an “F” default to high.

The API772x devices are supplied in the SO-8W (Type CJ) package and are available with prices starting from $0.46 in 1,000-piece quantities.

More information about the RobustISO family can be found at: https://www.diodes.com/products/isolation.

About Diodes Incorporated

Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor’s SmallCap 600 and Russell 3000 Index company, delivers high-quality semiconductor products to the world’s leading companies in the automotive, industrial, computing, consumer electronics, and communications markets. We leverage our expanded product portfolio of analog and discrete power solutions combined with leading-edge packaging technology to meet customers’ needs. Our broad range of application-specific products and solutions-focused sales, coupled with global operations including engineering, testing, manufacturing, and customer service, enable us to be a premier provider for high-volume, high-growth markets. For more information, visit www.diodes.com.

*According to Diodes Incorporated's isolation reliability calculations.

RobustISO™ is a trademark of Diodes Incorporated.

The Diodes logo is a registered trademark of Diodes Incorporated in the United States and other countries.

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