ISO7231ADW

Overview

The ISO7231ADW is a triple-channel digital isolator from Texas Instruments, operating at a data rate of 1 Mbps. It features a 4000 Vpk isolation voltage and supports a common-mode transient immunity (CMTI) of 25 kV/µs. The device utilizes capacitive coupling technology and operates within a supply voltage range of 3.15 V to 5.5 V. It offers a maximum propagation delay of 95 ns with rise and fall times of approximately 2 ns. Packaged in a 16-pin SOIC, it functions across an industrial temperature range of -40°C to 125°C.

Feature Summary

• Provides galvanic isolation between circuits using capacitive coupling technology for signal transmission.
• Delivers high common-mode transient immunity to maintain signal integrity in noisy environments.
• Supports bidirectional or unidirectional data flow depending on channel configuration.

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing enhanced safety isolation barriers
• Power metering applications with high-voltage separation requirements

Procurement Notes

Verify the specific suffix 'ADW' to confirm the 16-pin SOIC package and extended temperature rating. Ensure compatibility with existing PCB footprints for SOIC-16 components. Check for end-of-life notices as some variants may be discontinued. Confirm insulation certification requirements match application standards such as UL or IEC before finalizing procurement.

Selection Notes

Select this component when three isolated channels are required for low-speed digital signals. Compare against ISO7231CDW if higher data rates are needed, though CMTI may differ. Consider power consumption specifications relative to system thermal constraints. Verify that the 4000 Vpk isolation level meets the safety regulations of the target market.

Part Context

This part belongs to the ISO72xA family of general-purpose digital isolators. It serves as a replacement for older optocoupler designs by offering smaller size and lower power consumption. The device integrates both transmitter and receiver circuits on a single silicon die.

Replacement Considerations

ISO7231DWR is listed as a potential substitute. Verify pinout compatibility and electrical parameter equivalence before swapping components in existing designs.