MAX78615+LMU/A01T

Overview

The MAX78615+LMU/A01T is an isolated energy measurement processor (EMP) designed for load monitoring and control in 2-wire single-phase or 3-wire split-phase AC circuits. It integrates a 24-bit processor with field-upgradeable firmware to perform signal processing, compensation, and data formatting. The device supports flexible sensor configurations using up to two MAX78700 isolated data converters and offers multiple host interface options including SPI, I2C, and UART.

Feature Summary

• Best-in-class embedded algorithms support highly accurate electricity measurements
• Nonvolatile storage of calibration coefficients and input configurations
• Flexible sensor configuration supporting up to two MAX78700 devices
• Integrated alarm monitoring and fault detection schemes

Applications

• Building automation systems (commercial and industrial)
• Inverters and renewable energy systems
• Level 1 and 2 EV charging systems
• Grid-friendly appliances and smart plugs

Procurement Notes

Verify the specific suffix (+LMU/A01T) against the manufacturer's current datasheet to ensure compatibility with your system architecture. Confirm that the required development kit, such as MAXREFDES14#, is available for evaluation purposes. Check RoHS compliance status and packaging details directly from official documentation before finalizing procurement decisions.

Selection Notes

Select this component when designing isolated metering solutions for single-phase or split-phase AC loads. It is suitable for applications requiring high accuracy and low host overhead due to internal signal processing. Consider the small 24-TQFN package size and reduced bill of materials if space constraints are critical. Ensure the host system can utilize the supported SPI, I2C, or UART interfaces for seamless integration.

Part Context

This part belongs to the Metering Systems on a Chip family from Maxim Integrated, now part of Analog Devices Inc. It serves as an isolated EMP for load monitoring units, distinct from polyphase variants like the MAX78615+PPM series. The device simplifies design by integrating flash memory and advanced algorithms, reducing the need for external microcontrollers in basic metering applications.

Replacement Considerations

Consult the manufacturer's obsolescence notices for potential end-of-life status. Verify functional equivalence with other isolated EMPs if direct substitution is required. Ensure pinout and interface compatibility match the existing PCB layout before considering alternative components.