ISO7821FDW

Overview

The ISO7821FDW is a dual-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC package. It supports signaling rates up to 100 Mbps with a propagation delay of 11 ns. The device operates on a supply voltage range of 2.25 V to 5.5 V and draws 7.5 mA of operating current. It provides an insulation voltage rating of 5700 Vrms using capacitive coupling technology. The component functions within a temperature range of -55°C to +125°C and features unidirectional signal polarity without shutdown capabilities.

Feature Summary

• Provides high-performance isolation via capacitive coupling technology for reliable signal transmission across isolated boundaries.
• Supports wide supply voltage operation ranging from 2.25 V to 5.5 V, enabling compatibility with various logic levels.
• Features a wide operating temperature range suitable for demanding industrial environments.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high isolation ratings
• Power metering applications

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Ensure compliance with RoHS directives and check humidity sensitivity levels before storage. Confirm that the supplier provides valid traceability documentation for this Texas Instruments component.

Selection Notes

Select this component when dual-channel isolation with 5700 Vrms rating is required. It is suitable for designs needing 100 Mbps data rates and wide temperature tolerance. Consider the SOIC-16 footprint for PCB layout constraints.

Part Context

This part belongs to the ISO7821 series of digital isolators. It offers dual-channel functionality distinct from quad-channel variants like the ISO7841. The device utilizes Texas Instruments' proprietary capacitive isolation technology for robust performance.

Replacement Considerations

Check for ISO7821FDWR as a reel-based alternative. Verify pinout compatibility if substituting with other dual-channel isolators from different manufacturers.