MCP3919A1T-E/MQ

Overview

The MCP3919A1T-E/MQ is a three-channel energy metering front-end analog-to-digital converter manufactured by Microchip Technology. It integrates high-precision sigma-delta ADCs for simultaneous voltage and current measurement across three phases. The device features an SPI interface for digital communication and operates with a single 3V supply. It includes integrated programmable gain amplifiers, bandgap reference, and on-chip calibration data to ensure accurate power monitoring in multi-phase applications.

Feature Summary

• Integrates three independent high-resolution sigma-delta ADC channels for simultaneous multi-phase signal acquisition
• Includes integrated programmable gain amplifiers and precision bandgap reference for signal conditioning
• Supports digital calibration via SPI interface to maintain measurement accuracy over temperature and time
• Provides comprehensive power monitoring metrics including active, reactive, and apparent energy

Applications

• Three-phase residential and commercial electricity meters
• Multi-phase power quality analyzers
• Industrial energy management systems requiring phase-by-phase monitoring
• Smart grid infrastructure components

Procurement Notes

Verify the specific package suffix MQ against official Microchip documentation to confirm pinout and thermal characteristics. Ensure the ordering part number matches the exact tape-and-reel quantity specified in the manufacturer's latest datasheet. Confirm RoHS compliance status and automotive qualification if required for the target application environment.

Selection Notes

Select this component when designing systems requiring precise three-phase energy measurement with minimal external passive components. The integrated PGA and calibration features reduce board space and simplify design compared to discrete solutions. Ensure the host microcontroller supports the required SPI clock speeds and data formats for real-time energy calculation.

Part Context

This device belongs to the MCP3919 family of energy metering AFEs from Microchip Technology. It is designed as a drop-in replacement for previous generation metering ICs while offering improved integration and reduced external component count. The family targets utility-grade metering applications requiring high accuracy and long-term stability.

FAQ

Does the MCP3919A1T-E/MQ support simultaneous sampling of all three phases?

Yes, the device features three independent sigma-delta ADCs that allow for simultaneous sampling of voltage and current signals across all three phases.

What type of interface does the MCP3919A1T-E/MQ use for configuration and data readout?

It utilizes a standard Serial Peripheral Interface (SPI) for communicating with the host processor for register configuration and energy data retrieval.