ISO7821DWR

Overview

The ISO7821DWR is a high-performance, dual-channel digital isolator manufactured by Texas Instruments. It features reinforced isolation certification with an 8000 VPK isolation voltage and 5700 VRMS insulation rating. The device supports data rates up to 100 Mbps and offers a common-mode transient immunity of 100 kV/µs. It operates on a supply voltage range of 2.25 V to 5.5 V with a typical operating current of 7.5 mA. Propagation delays are specified at 11 ns for the LLD variant and 16 ns for standard versions. The component is housed in a 16-SOIC package and functions within a temperature range of -55°C to 125°C.

Feature Summary

• Reinforced dual-channel digital isolation with 8000 VPK capability
• High common-mode transient immunity of 100 kV/µs
• Capacitive coupling technology for signal transmission
• Wide operating temperature range suitable for industrial environments

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Data acquisition systems with high noise immunity requirements
• Power electronics control circuits

Procurement Notes

Verify that the specific suffix 'DWR' corresponds to the tape-and-reel packaging format as indicated by distributor listings. Confirm that the ordered unit matches the exact Texas Instruments part number to ensure compliance with the reinforced isolation specifications. Check datasheet revisions for any updates to electrical characteristics or mechanical dimensions before finalizing procurement orders.

Selection Notes

Select this component when reinforced isolation certification is mandatory for safety standards. Choose the ISO7821DWR over non-reinforced variants if higher dielectric strength is required. Consider the 16-SOIC package constraints for PCB layout. Ensure the 100 Mbps data rate meets system timing requirements. Verify that the 2.25 V to 5.5 V supply range aligns with the target logic levels.

Part Context

The ISO7821 belongs to Texas Instruments' ISO78xx family of digital isolators. This series utilizes capacitive coupling technology to provide isolation between circuits. The ISO7821 specifically offers two independent channels for bidirectional or unidirectional signal transfer. It is designed to replace traditional optocouplers in applications demanding higher reliability and lower power consumption.

Replacement Considerations

Public confirmed substitute part numbers: ISO7821DW, ISO7821LLDWR.