ISO7821DW

Overview

The ISO7821DW is a general-purpose digital isolator manufactured by Texas Instruments, featuring two independent channels in a 16-pin SOIC package. It utilizes capacitive coupling technology to provide reinforced isolation with a voltage rating of 5700Vrms. The device supports data rates up to 100Mbps and offers a common-mode transient immunity of 100kV/µs. Operating temperatures range from -55°C to +125°C, with supply voltages between 2.25V and 5.5V. Propagation delays are typically 16ns maximum.

Feature Summary

• Provides reinforced electrical isolation via capacitive coupling technology for signal integrity across isolated boundaries.
• Features high common-mode transient immunity to maintain reliable operation in electrically noisy environments.
• Supports unidirectional data transmission with dual-channel configuration for versatile interface applications.

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing reinforced safety isolation
• Power metering circuits for accurate data acquisition

Procurement Notes

Verify the specific datasheet revision and ordering suffix to ensure compatibility with your design requirements. Confirm that the 16-SOIC package dimensions match your PCB footprint constraints. Check for RoHS compliance status and moisture sensitivity level before procurement to ensure proper storage and handling procedures are followed during assembly.

Selection Notes

Select this component when reinforced isolation ratings and high-speed data transmission are required in a compact surface-mount package. Consider the 100Mbps data rate and 100kV/µs CMTI specifications against system noise levels. Ensure the operating temperature range meets environmental conditions and verify power supply voltage compatibility within the specified limits.

Part Context

This part belongs to the ISO7821 family of digital isolators from Texas Instruments. It is designed as a cost-effective alternative to traditional transformer or optical isolators. The device integrates multiple channels into a single package to reduce board space while maintaining high performance standards for industrial and commercial applications.

Replacement Considerations

Check for ISO7821DWR variant which shares identical electrical characteristics but differs in packaging format. Verify pinout compatibility and isolation ratings when substituting with other digital isolator families. Ensure any replacement maintains the same reinforcement isolation standards required by safety regulations.