MCP3906AT-E/SS

Overview

The MCP3906AT-E/SS is a single-phase energy metering IC designed for residential applications, supporting IEC 62053 standards. It features two 16-bit delta-sigma ADCs and an on-chip DSP module for active power calculation. The device operates within a supply voltage range of 4.5 V to 5.5 V and draws 2.7 mA of supply current. It provides a frequency output proportional to average active power and a high-frequency output proportional to instantaneous power. The chip includes a low-drift reference voltage (<15 ppm/°C) and supports input impedances of 390 kΩ.

Feature Summary

• Integrated on-chip digital signal processing (DSP) module for calculating active power without external microcontroller intervention.
• Includes high-output drivers specifically designed to drive mechanical counters, reducing field failures and mechanical jamming.
• Features an ultra-low temperature drift reference voltage with specialized bandgap temperature curves to minimize gradients across the industrial temperature range.
• Contains dedicated modules for preventing current creep at no-load thresholds and limiting measurement during low-voltage conditions via power-on reset.

Applications

• Single-phase residential energy meters
• Analog front-end designs for LCD microcontroller-based meters
• Stand-alone low-cost energy meter implementations

Procurement Notes

Verify that the specific suffix 'E' denotes automotive qualification under AEC-Q100 standards, as distinct from the standard 'I' grade. Confirm package integrity for the 24-SSOP form factor upon receipt. Ensure compatibility with the required operating temperature range of -40°C to 85°C or extended limits if specified in the final datasheet revision. Cross-reference ordering information with official Microchip documentation to avoid substitution errors.

Selection Notes

Select this component when designing single-phase metering systems requiring compliance with IEC 62053 standards. It is suitable for applications needing integrated power calculation and mechanical counter driving capabilities. Consider the 24-SSOP package constraints for PCB layout. Evaluate the need for AEC-Q100 qualification versus standard industrial grades based on end-use environment requirements.

Part Context

This part belongs to the MCP3906 family of energy metering ICs from Microchip Technology. It is functionally similar to the MCP3906A but may differ in qualification levels or specific manufacturing batches. The family is characterized by its ability to serve as both a standalone meter and an analog front-end for MCU-based designs, offering high accuracy across a wide dynamic range.

Replacement Considerations

The MCP3906AT-I/SS is a related variant within the same product family. Verify if the 'I' suffix meets the specific environmental or qualification requirements of the target application before substituting.

FAQ

What type of outputs does the MCP3906AT-E/SS provide for calibration?

It provides a frequency output proportional to average active power and a high-frequency output proportional to instantaneous power for meter calibration.

How does the MCP3906AT-E/SS handle mechanical counter integration?

It includes fixed-function high-output drivers on-chip designed to drive mechanical counters, which helps reduce field faults and mechanical counter jamming.