71M6113-ILR/F

Overview

The MAXIM Integrated 71M6113-ILR/F is an isolated sensor IC designed for Teridian’s 4th-generation polyphase-metering systems-on-chips. It enables the use of non-isolating sensors, such as resistive shunts, without requiring costly isolation transformers or current transformers. The device integrates a 22-bit delta-sigma ADC, a differential amplifier, a precision voltage reference, and an on-chip temperature sensor. It operates within an industrial temperature range and consumes approximately 3.3mW typical power.

Feature Summary

• Provides galvanic isolation via bidirectional digital communication using low-cost pulse transformers.
• Delivers high measurement accuracy over a wide dynamic current range.
• Includes integrated temperature sensing for localized digital compensation.
• Powered directly by the metering SoC through transformer pulses.

Applications

• Single-phase energy metering systems
• Polyphase energy metering applications
• Industrial electricity monitoring

Procurement Notes

Verify the specific suffix ILR against the official datasheet to confirm package type and temperature grade. Confirm compatibility with the target Teridian 71M654x series system-on-chip. Ensure the design supports the required pulse transformer interface for power and data transmission. Check for end-of-life status or alternative sourcing options if availability is constrained.

Selection Notes

Select this component when cost reduction is prioritized over traditional isolation methods like CTs. It is suitable for designs requiring immunity to magnetic tampering and enhanced reliability. The choice depends on the ability to utilize shunt resistors down to specified low values while maintaining compliance with IEC and ANSI standards.

Part Context

This part belongs to the 71M6xxx family of isolated sensor ICs from Maxim Integrated. These devices are engineered to work in conjunction with Teridian metering SoCs. They replace complex isolation hardware with a digital link, simplifying the bill of materials and improving system performance in utility metering environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB layouts and transformer specifications before considering any alternative components.