ISO7221AQDRQ1

Overview

The ISO7221AQDRQ1 is a dual-channel automotive-grade digital isolator from Texas Instruments, designed for robust signal transmission across isolation barriers. It features a 1 Mbps data rate and supports bidirectional or unidirectional logic inputs with a 1/1 channel configuration. The device operates on a single supply voltage ranging from 3V to 5.5V and provides a high isolation voltage of 4000Vpk. It exhibits a common-mode transient immunity of 25kV/µs and maintains a maximum propagation delay of 480ns. Packaged in an 8-SOIC format, it functions within a temperature range of -40°C to 125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Capacitive coupling technology enables high-speed digital signal isolation without magnetic components.
• Channels are oriented in opposite directions to facilitate simplified printed circuit board layout.

Applications

• Automotive gate driver circuits requiring galvanic isolation between control and power stages.
• In-vehicle communication networks such as CAN and LIN bus systems.
• Industrial automation controllers needing isolated signal interfaces for sensor data acquisition.

Procurement Notes

Verify the specific suffix 'QDRQ1' to confirm the automotive grade, SOIC package, and tape-and-reel packaging configuration. Ensure compatibility with the target application's voltage levels and thermal requirements before integration. Cross-reference the manufacturer datasheet revision to confirm current pinout and electrical specifications.

Selection Notes

Select this component when automotive certification is mandatory and moderate data rates up to 1 Mbps are sufficient. It serves as a suitable alternative to optocouplers where higher speed and lower power consumption are required. Consider the 8-SOIC footprint constraints and the need for basic or reinforced isolation ratings per IEC 62368-1 standards.

Part Context

This part belongs to the ISO722x-Q1 family of dual-channel digital isolators. It shares the same physical package and pinout with variants offering different data rates, such as the 25 Mbps ISO7221CQDRQ1. The 'A' designation typically indicates the 1 Mbps signaling rate option within this series.

Replacement Considerations

Direct functional substitutes include other AEC-Q100 qualified dual-channel isolators from Texas Instruments, such as the ISO7221CQDRQ1 for higher speed applications. Verify that any replacement maintains the 4000Vpk isolation rating and compatible supply voltage range.