MCP3918A1-E/ML

Overview

The MCP3918A1-E/ML is a single-channel analog front end (AFE) designed for energy metering applications. It features a 24-bit Sigma-Delta ADC with a sampling rate of 125 kS/s and supports differential inputs. The device operates on a supply voltage ranging from 2.7 V to 3.6 V and includes an internal 1.2 V reference. It communicates via I2C or SPI interfaces and is housed in a QFN-20 package. Certified under AEC-Q100, it functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-resolution 24-bit Sigma-Delta analog-to-digital converter for precise signal acquisition.
• Supports dual digital communication protocols including I2C and SPI for flexible system integration.
• Includes an internal voltage reference to simplify external component requirements.
• Designed for automotive reliability with AEC-Q100 qualification.

Applications

• Single-phase energy metering systems
• Smart grid monitoring devices
• Industrial power measurement equipment

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm pinout and functional compatibility. Ensure the QFN-20 package dimensions align with PCB layout constraints. Confirm that the operating voltage range matches the target system supply. Check for moisture sensitivity level requirements during storage and handling. Validate interface settings for I2C or SPI configuration before integration.

Selection Notes

Select this component when a single-channel solution with high resolution is required for energy monitoring. The integrated AFE reduces bill of materials by combining amplification and conversion. Consider the QFN-20 package size for compact designs. Verify thermal performance within the specified industrial temperature range. Ensure the microcontroller supports the required serial communication protocol.

Part Context

This part belongs to the MCP3918 series of analog front ends from Microchip Technology. It is specifically optimized for accurate energy measurement in utility and industrial applications. The series provides integrated signal conditioning and digitization capabilities.

Replacement Considerations

MCP3918BA1-E/ML is listed as an alias for this part number. Verify exact functional equivalence through official datasheets before substitution.