ISO7731FDBQR

Overview

The ISO7731FDBQR is a high-speed, robust EMC reinforced triple-channel digital isolator manufactured by Texas Instruments. It features capacitive coupling technology within a 16-SSOP package. The device supports unidirectional data transmission with two forward channels and one reverse channel at a data rate of 100 Mb/s. Key electrical parameters include an insulation voltage of 2500 Vrms, a propagation delay of 11 ns, and a maximum power dissipation of 150 mW. It operates on a supply voltage range of 2.25 V to 5.5 V with a typical operating current of 13.1 mA. The component functions reliably across an extended temperature range from -55°C to +125°C.

Feature Summary

• Provides reinforced isolation for high-speed signal transmission between isolated circuits
• Utilizes capacitive coupling technology to ensure robust electromagnetic compatibility performance
• Integrates three independent channels configured as two forward and one reverse path

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Power metering applications with high common-mode transient immunity

Procurement Notes

Verify the specific suffix FDBQR against the manufacturer's official datasheet to confirm pinout, insulation ratings, and package dimensions. Ensure compliance with RoHS directives and check moisture sensitivity levels for proper storage and handling procedures before assembly.

Selection Notes

Select this component when reinforced isolation certification is required for safety-critical applications. Compare the 2500 Vrms insulation rating against system requirements. Consider the 16-SSOP footprint for PCB layout constraints and verify that the 100 Mb/s data rate meets the communication speed needs of the target interface.

Part Context

This part belongs to the ISO773x family of digital isolators from Texas Instruments. It shares the same core architecture and pinout compatibility with other variants in the series, such as the ISO7730 and ISO7731, differing primarily in channel configuration and insulation reinforcement levels.

Replacement Considerations

The ISO7731BDWR serves as a pin-compatible alternative offering higher insulation voltage. Verify if the increased 5000 Vrms rating is necessary or if the standard SSOP-16 package dimensions match the existing design constraints.