ISO7840FDWR

Overview

The ISO7840FDWR is a high-performance, reinforced quad-channel digital isolator manufactured by Texas Instruments. It features four independent channels with a 4/0 input-to-output configuration and unidirectional signal flow. The device utilizes capacitive coupling technology to provide electrical isolation between circuits. Key electrical specifications include a data rate of 100 Mbps, a common-mode transient immunity (CMTI) of 100 kV/µs, and an insulation voltage rating of 5700 Vrms. It operates within a supply voltage range of 2.25 V to 5.5 V and supports a wide operating temperature range from -55°C to +125°C.

Feature Summary

• Provides reinforced isolation for safety-critical applications with high dielectric strength
• Features ultra-high common-mode transient immunity to maintain signal integrity in noisy environments
• Offers low propagation delay and pulse width distortion for precise timing control
• Integrates four independent channels in a compact SOIC-16 package

Applications

• Industrial automation systems requiring robust galvanic isolation
• Medical equipment needing reinforced isolation for patient safety
• Power metering and energy management systems
• Automotive electronics and electric vehicle charging infrastructure

Procurement Notes

Verify the specific suffix 'FDWR' corresponds to the SOIC-16 package and tape-and-reel packaging format. Confirm that the required insulation ratings meet the safety standards of the target application. Check for RoHS compliance status and moisture sensitivity level requirements during storage and handling. Ensure the ordering part number matches the exact channel configuration and speed grade needed.

Selection Notes

Select this component when reinforced isolation is mandated by safety regulations rather than basic isolation. Consider the 100 Mbps data rate and 100 kV/µs CMTI for high-speed, high-noise industrial environments. Evaluate the 4/0 channel count against system interface requirements. Compare power consumption and package size constraints against alternative isolators if space or energy efficiency is critical.

Part Context

The ISO7840 belongs to Texas Instruments' ISO784x family of high-performance digital isolators. This series is designed to replace traditional optocouplers in applications demanding higher reliability, lower power consumption, and better performance consistency. The FDWR variant specifically denotes the SOIC-16 surface-mount package with reel packaging, suitable for automated assembly processes.

Replacement Considerations

ISO7840DWWR is listed as a parameter-equivalent substitute. Verify package dimensions and thermal characteristics before substitution.