ISO721DR

Overview

The ISO721DR is a single-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology for signal transmission. It operates within a supply voltage range of 3 V to 5 V and supports data rates up to 100 Mb/s. The device provides an isolation voltage of 2500 Vrms with a common-mode transient immunity (CMTI) of 25 kV/µs. Key electrical parameters include a propagation delay of 17 ns and power consumption of 2 mA on the input side and 10 mA on the output side. It functions reliably across an operating temperature range of -40°C to +125°C and is housed in an 8-SOIC package.

Feature Summary

• Capacitive coupling architecture ensures robust signal integrity across the isolation barrier.
• High common-mode transient immunity protects against noise in electrically noisy environments.
• Unidirectional channel design simplifies integration into point-to-point communication links.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Power metering circuits for accurate signal measurement

Procurement Notes

Verify the specific suffix 'DR' confirms the SOIC-8 tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the component meets the required thermal management specifications for the intended operating environment.

Selection Notes

Select this component when a single unidirectional channel with high-speed performance is required. The 100 Mb/s data rate suits most standard digital communication protocols. Consider the 2500 Vrms isolation rating for basic safety requirements rather than reinforced isolation standards.

Part Context

This part belongs to the ISO721 family of high-speed digital isolators. It serves as a general-purpose interface solution for replacing traditional optocouplers in modern designs. The series offers improved performance metrics compared to legacy isolation technologies.

Replacement Considerations

ISO721MDG4 is a documented variant within the same product family offering similar isolation characteristics.