IL 721-3E

Overview

The IL 721-3E is a general-purpose digital isolator from NVE Corp's IsoLoop series. It features two channels with a data rate of 110Mbps and a common-mode transient immunity (CMTI) of 100kV/µs. The device provides 2500Vrms isolation voltage and operates on a supply voltage of 3V to 5.5V. It utilizes GMR technology for signal transmission. The component is available in an 8-SOIC package with a width of 0.154 inches (3.90mm). Maximum propagation delay is 15ns, with typical rise/fall times of 1ns. It supports a wide operating temperature range from -40°C to 100°C.

Feature Summary

• Utilizes Giant Magnetoresistance (GMR) sensing technology for signal isolation
• Features a ceramic/polymer composite barrier for high isolation reliability
• Provides high common-mode transient immunity for noisy environments
• Supports bidirectional or unidirectional data transmission depending on configuration

Applications

• Industrial automation systems requiring galvanic isolation
• Automotive electronic control units
• Medical equipment with safety isolation requirements
• Power electronics gate drive circuits

Procurement Notes

Verify the specific suffix '3E' against official NVE documentation to confirm pinout and electrical characteristics. Ensure compatibility with system voltage levels and thermal management requirements. Confirm RoHS compliance status through current datasheets. Check for any recent product change notices affecting packaging or material composition before finalizing procurement.

Selection Notes

Select this component when high-speed data transfer up to 110Mbps is required alongside robust noise immunity. The GMR technology offers advantages over capacitive or optical isolators in terms of power consumption and size. Consider the 8-SOIC package constraints for PCB layout. Evaluate the 2500Vrms isolation rating against system safety standards. Compare performance metrics with alternative technologies if extreme CMTI is not critical.

Part Context

The IL 721-3E belongs to NVE's IsoLoop family, which leverages magnetic coupling principles. This series is designed for applications demanding high reliability and long-term stability. The use of GMR sensors allows for efficient signal transmission across the isolation barrier without the need for complex modulation schemes often found in other isolator types.

Replacement Considerations

NVE IL 711S-3E: Offers higher speed (150Mbps) but similar isolation and package. Analog Devices ADUM1200CRZ-RL7: Uses iCoupler technology with lower speed (25Mbps) but comparable isolation voltage. Texas Instruments ISO7220ADR: Capacitive coupling technology with lower speed (1Mbps) but similar package and isolation ratings.