ISO7721BDWR

Overview

The ISO7721BDWR is a dual-channel digital isolator from Texas Instruments featuring capacitive coupling technology. It provides basic insulation with a rated isolation voltage of 3000 Vrms and supports data rates up to 100 Mb/s. The device operates within a supply voltage range of 2.25 V to 5.5 V, drawing a typical quiescent current of 7.3 mA per channel. Key electrical parameters include a propagation delay of 17 ns, rise/fall times of 3.9 ns, and pulse width distortion of 0.5 ns. It functions reliably across an operating temperature range of -40°C to +125°C and is housed in an 8-SOIC package.

Feature Summary

• Provides robust electromagnetic compatibility (EMC) performance for noisy environments
• Features high common-mode transient immunity to prevent signal errors
• Supports bidirectional communication with independent input/output channels

Applications

• Industrial automation and control systems
• Medical devices and equipment
• Power metering applications

Procurement Notes

Verify the specific suffix 'B' indicates basic insulation ratings compared to reinforced options. Confirm the 'DWVR' package designation matches the required surface-mount footprint and tape-and-reel quantity specifications for your assembly line. Ensure compliance with RoHS3 standards if required by your manufacturing regulations.

Selection Notes

Select this component when basic insulation is sufficient for safety requirements, offering a cost-effective alternative to reinforced isolators. Consider the 3000 Vrms rating against system isolation needs. Evaluate the 100 Mb/s speed limit against signal bandwidth requirements. Check that the SOIC-8 package fits the available PCB space constraints.

Part Context

This part belongs to the ISO772x family of high-speed digital isolators. Unlike the ISO7721DWR which offers reinforced isolation, the ISO7721BDWR is specified for basic insulation applications. It shares similar electrical characteristics with other family members but differs in safety certification ratings and UL recognition levels.

Replacement Considerations

The ISO7721DWR serves as a direct functional replacement if reinforced isolation is acceptable or required instead of basic insulation. Both parts share identical pinouts and electrical performance metrics.