ISO7721FDWV

Overview

The ISO7721FDWV is a dual-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology for signal transmission. It features unidirectional data flow with a maximum data rate of 100 Mb/s and an insulation voltage rating of 5000 Vrms. The device operates within a supply voltage range of 2.25 V to 5.5 V, consuming a typical operating current of 7.3 mA. Key timing parameters include a propagation delay of 17 ns, with rise and fall times of 3.9 ns each, and a pulse width distortion of 0.5 ns. It is housed in an SOIC-8 surface-mount package and supports an extended operating temperature range from -55°C to +125°C.

Feature Summary

• Provides robust electromagnetic compatibility (EMC) performance suitable for automotive applications
• Offers reinforced isolation capabilities with high common-mode transient immunity
• Delivers high-speed digital signal transmission via capacitive coupling technology

Applications

• Automotive electronic control units requiring AEC-Q100 qualified components
• Industrial automation systems needing reliable galvanic isolation
• Power conversion circuits demanding high-voltage separation

Procurement Notes

Verify the specific suffix 'Q1' if automotive qualification is strictly required, as the base model ISO7721FDWV may differ in certification status from ISO7721FQDWVRQ1. Confirm that the SOIC-8 package matches your PCB footprint requirements. Ensure that the unidirectional channel configuration aligns with your circuit design needs. Check for moisture sensitivity level compliance during storage and handling procedures.

Selection Notes

Select this component when bidirectional isolation is not required, as it supports only unidirectional data flow. Consider the 100 Mb/s data rate limit against your system's communication speed requirements. Evaluate the 5000 Vrms insulation rating against your safety standards. The wide operating temperature range makes it suitable for harsh environments where standard commercial grade parts might fail.

Part Context

This part belongs to the ISO772x family of high-performance digital isolators. These devices are designed to replace bulky magnetic couplers and offer superior reliability in noisy environments. The ISO7721 variant specifically provides two isolated channels, making it efficient for applications requiring multiple isolated signals within a compact SOIC-8 footprint.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.