company blog about TI ISOW7842DWER High-Performance Enhanced Quad-Channel Digital Isolator

TI ISOW7842DWER High-Performance Enhanced Quad-Channel Digital Isolator

Shenzhen Mingjiada Electronics Co., Ltd., as a globally renowned distributor of electronic components, consistently supplies TI's ISOW7842DWER high-performance enhanced quad-channel digital isolator. This product, with its highly integrated characteristics—simultaneously providing signal isolation and isolated power—serves as an ideal solution for space-constrained isolation designs.

【Product Overview】

The ISOW7842DWER is a four-channel 2/2 enhanced digital isolator with an integrated power supply.

Employing capacitive coupling technology, the ISOW7842DWER incorporates an efficient DC/DC converter and on-chip transformer to deliver an isolated power supply of up to 650mW.

The integrated power supply design eliminates the need for external isolated DC-DC converters, significantly saving PCB space and reducing system costs.

Supporting a wide input voltage range of 3V to 5.5V, the ISOW7842DWER delivers regulated 5V or 3.3V outputs, making it suitable for diverse applications.

Its output power capability varies across different voltage configurations: ≥130mA load current is available for 5V to 5V and 5V to 3.3V; ≥75mA for 3.3V to 3.3V; and ≥40mA for 3.3V to 5V.

The ISOW7842DWER delivers exceptional isolation performance with a rating of 5000VRMS, surge immunity up to 10kVPK, and a minimum common-mode transient immunity (CMTI) of ±100kV/μs.

The ISOW7842DWER provides a high-speed data rate of 100Mbps with propagation delay as low as 13ns (typical, 5V supply), ensuring efficient real-time signal transmission.

The ISOW7842DWER demonstrates outstanding electromagnetic compatibility (EMC), featuring ±8kV IEC 61000-4-2 contact discharge protection across the isolation barrier. Its low-emission characteristics enable compliance with stringent EMC requirements.

The ISOW7842DWER further incorporates multiple protection mechanisms, including soft-start to limit inrush current, overload and short-circuit protection, and thermal shutdown functionality, ensuring safe and stable system operation.

【Key Features and Performance Parameters】

The ISOW7842DWER demonstrates outstanding performance in both signal isolation and power isolation:

Signal Isolation Characteristics

Supporting data transfer rates up to 100 Mbps with a low propagation delay of 13 ns (typical, 5V supply), it guarantees real-time signal transmission.

Employing a four-channel configuration (2/2), it provides unidirectional channels with two channels per direction.

Its common-mode transient immunity (CMTI) is rated at a minimum of ±100 kV/µs, guaranteeing reliable communication in noisy industrial environments.

The isolation barrier provides ±8kV IEC 61000-4-2 contact discharge protection across the entire barrier, delivering system-level ESD, EFT, and surge immunity.

Power Isolation Characteristics

The integrated high-efficiency DC-DC converter features a wide input voltage range of 3V to 5.5V, delivering regulated outputs of 5V or 3.3V.

Available load current varies according to input/output voltage configuration:

5V to 5V and 5V to 3.3V: Available load current ≥ 130 mA

3.3V to 3.3V: Available load current ≥ 75 mA

3.3V to 5V: Available load current ≥ 40 mA

The power converter incorporates soft-start functionality to limit inrush current, alongside overload, short-circuit, and thermal shutdown protection, ensuring safe system operation.

【Technical Advantages】

The ISOW7842DWER offers multiple technical advantages over traditional isolation solutions:

High Integration

The ISOW7842DWER's high integration eliminates the need for separate isolated power supplies in space-constrained isolated designs, significantly reducing board area while lowering system complexity and cost.

Traditional isolation solutions require two discrete components—a digital isolator and an isolated power supply—whereas the ISOW7842DWER integrates these functions within a single chip.

Superior Isolation Performance

The ISOW7842DWER delivers an isolation rating of up to 5000 VRMS and surge immunity of up to 10 kVPK.

Its isolation rating of 5000 VRMS complies with UL 1577 standards and has secured multiple international safety certifications.

Superior Electromagnetic Compatibility

The ISOW7842DWER exhibits low emissions and outstanding electromagnetic compatibility (EMC).

Innovative chip design and routing techniques significantly enhance the device's EMC performance, mitigating system-level ESD, EFT, and surge issues while meeting radiated emission standards.

【Extensive Application Fields】

The ISOW7842DWER is suitable for diverse industrial and application scenarios requiring high-reliability isolation:

Industrial Automation

Within industrial automation systems, the ISOW7842DWER can be employed in programmable logic controllers (PLCs), distributed control systems, and sensor interfaces. It provides signal and power isolation, ensuring stable system operation in harsh industrial environments.

Motor Control

Within motor control applications, the ISOW7842DWER can be employed for isolation in drives and inverters, providing isolation for control signals and power supplies to shield low-voltage control circuits from high-side interference.

Its high CMTI performance ensures reliable operation in switching noise environments.

Grid Infrastructure

Within grid infrastructure, such as power line communication systems and smart meters, the ISOW7842DWER delivers essential isolation protection, meeting relevant safety standards.

Medical Equipment

Medical devices demand exceptionally high standards of safety and reliability. The ISOW7842DWER's superior isolation performance and multiple safety certifications make it an ideal choice for medical electronics.

Test and Measurement

Within high-precision test and measurement equipment, the ISOW7842DWER delivers clean isolated power and signal paths, guaranteeing measurement accuracy and equipment safety.