ISO7840FDWWR

Overview

The ISO7840FDWWR is a quad-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology to provide electrical isolation between circuit sections. It features four unidirectional channels with no reverse path, supporting data rates up to 100 Mb/s and a common-mode transient immunity of 100 kV/µs. The device operates within a supply voltage range of 2.25 V to 5.5 V and maintains signal integrity with a propagation delay of 11 ns. It offers an insulation voltage rating of 5700 Vrms and functions reliably across an extended temperature range from -55°C to +125°C. Packaged in a 16-pin SOIC format.

Feature Summary

• Provides high-reliability electrical isolation using robust capacitive coupling architecture to protect sensitive electronics from high-voltage transients.
• Ensures precise signal transmission through low pulse width distortion characteristics, maintaining data integrity at high speeds.
• Delivers exceptional noise immunity against fast-rising voltage spikes, ensuring stable operation in electrically noisy environments.

Applications

• Industrial automation systems requiring galvanic isolation for sensor interfaces
• Medical equipment needing reinforced isolation for patient-connected circuits
• Power metering applications involving high-voltage measurement stages

Procurement Notes

Verify the specific suffix 'WR' confirms the reel packaging configuration when sourcing components. Ensure compatibility with moisture sensitivity level requirements during storage and handling procedures. Confirm that the 16-SOIC footprint matches the target PCB design constraints. Validate that the operating temperature range meets the environmental specifications of the final assembly application.

Selection Notes

Select this component when four independent unidirectional isolation paths are required within a single package. Consider the 5700 Vrms insulation rating for applications demanding reinforced safety barriers. Evaluate the 100 Mb/s data rate capability against system bandwidth requirements. Assess the 2.25 V to 5.5 V supply voltage flexibility for compatibility with various logic families.

Part Context

This part belongs to the ISO7840 family of high-performance digital isolators designed by Texas Instruments. The series focuses on providing reliable signal transmission across isolation barriers while minimizing power consumption. The ISO7840FDWWR specifically represents the reel-packaged variant of the standard quad-channel isolator, optimized for automated surface-mount assembly processes.

Replacement Considerations

ISO7840DWWR serves as a parameter-equivalent alternative within the same product family, offering identical electrical specifications but potentially differing in packaging or revision status.