MCP3909-E/SS

Overview

The MCP3909-E/SS is a single-phase energy measurement integrated circuit designed for residential metering applications, supporting IEC 62053 international standards. It incorporates two 16-bit delta-sigma analog-to-digital converters with programmable gain up to 16 and an integrated voltage reference exhibiting ultra-low temperature drift of 15 ppm/°C. The device provides active power pulse output proportional to average real power and features an SPI interface for accessing ADC channels and multiplier data. Operating within a supply voltage range of 4.5 V to 5.5 V, it delivers waveform data at up to 14 kHz with 16-bit resolution and 20-bit multiplier output.

Feature Summary

• Supports IEC 62053 international energy metering specifications for single-phase residential applications
• Integrates two multi-bit, second-order, 16-bit delta-sigma analog-to-digital converters with programmable gain
• Features an on-chip voltage reference with ultra-low temperature drift characteristics
• Provides active power pulse output proportional to average active power alongside serial access

Applications

• Single-phase residential energy metering
• IEC 62053 compliant utility metering systems
• Low-cost transformer-less meter designs using shunt current sensing

Procurement Notes

Verify the specific suffix (E/SS) against official Microchip documentation to confirm industrial temperature rating and SSOP-24 package configuration. Ensure compatibility with system requirements for AEC-Q100 Grade 1 qualification if automotive standards are relevant. Confirm that the design utilizes the specified 4.5 V to 5.5 V supply range and SPI interface protocols for proper integration.

Selection Notes

Select this component for applications requiring compliance with IEC 62053 standards in single-phase environments. The integrated low-drift reference and dual ADC architecture simplify analog front-end design by reducing external component count. Consider the 14 kHz output rate and 20-bit multiplier precision when evaluating signal processing capabilities for accurate energy calculation.

Part Context

The MCP3909 belongs to Microchip's family of energy measurement ICs tailored for smart grid and residential metering. It serves as an analog front-end solution, replacing discrete amplifier and ADC circuits. The device is often paired with microcontrollers like the PIC18F85J90 in reference designs to create complete, cost-effective, transformer-less metering solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.