ISO7731FDWR

Overview

The ISO7731FDWR is a high-speed, robust EMC reinforced triple-channel digital isolator manufactured by Texas Instruments. It features capacitive coupling technology with a unidirectional signal path configuration of two forward channels and one reverse channel. The device supports data rates up to 100 Mb/s and offers an isolation rating of 5000 Vrms. It operates within a supply voltage range of 2.25 V to 5.5 V, drawing a typical operating current of 13.1 mA. Key electrical parameters include a propagation delay of 11 ns, rise/fall times of 3.9 ns, and pulse width distortion of 600 ps. It functions reliably across an extended temperature range from -55°C to +125°C and is housed in a 16-pin SOIC package.

Feature Summary

• Provides reinforced insulation barrier with robust electromagnetic compatibility performance for reliable signal transmission.
• Utilizes capacitive coupling technology to achieve high common-mode transient immunity.
• Integrates three independent logic channels in a single compact package for space-constrained designs.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Power metering and energy management circuits

Procurement Notes

Verify the specific suffix 'DWR' corresponds to the SOIC-16 package and tape-and-reel packaging format. Confirm that the component meets the required reinforced isolation standards for your application's safety regulations. Ensure compatibility with the target system's voltage levels and thermal requirements before finalizing procurement.

Selection Notes

Select this component when reinforced isolation ratings and high common-mode transient immunity are critical. It is suitable for applications demanding high-speed data transfer over isolated barriers. Consider the 16-pin SOIC footprint for PCB layout constraints. Evaluate the power consumption against system efficiency targets given the fixed operating current characteristics.

Part Context

This part belongs to the ISO7731 series of digital isolators from Texas Instruments. The series is designed for applications requiring high reliability and robust performance in noisy environments. The FDWR variant specifically denotes the SOIC-16 package with reel packaging, distinguishing it from other package options like SSOP or DIP available within the same functional family.

Replacement Considerations

Check for direct pin-compatible alternatives within the ISO7731 family that may offer different package styles or slight parameter variations. Verify that any substitute maintains the 5000 Vrms isolation rating and 100 Mbps data rate. Ensure the replacement component meets the same reinforced isolation certification requirements if applicable to the design.

FAQ

What is the maximum isolation voltage rating for the ISO7731FDWR?

The device has a reinforced isolation rating of 5000 Vrms.

Does the ISO7731FDWR support bidirectional communication?

No, it is configured as a unidirectional isolator with two forward channels and one reverse channel.

What is the typical operating current consumption?

The typical operating supply current is 13.1 mA.