MCP3906-I/SS

Overview

The MCP3906-I/SS is a single-phase energy metering integrated circuit manufactured by Microchip Technology. It features two 16-bit Sigma-Delta ADCs and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports a 2.4 V reference voltage and utilizes a serial interface for communication. Designed for high-precision applications, it offers a typical measurement error of 0.1% across a 1:500 dynamic range. The component is housed in a 24-pin SSOP package and complies with AEC-Q100 automotive qualification standards.

Feature Summary

• Integrates dual 16-bit Sigma-Delta analog-to-digital converters for precise signal acquisition.
• Includes on-chip digital signal processing modules for active power calculation.
• Features an ultra-low temperature drift reference voltage for stable performance.
• Provides dedicated drivers for mechanical counter actuation to reduce field failures.

Applications

• Single-phase residential energy meters
• Analog front-end designs for LCD microcontroller-based meters
• High-accuracy utility metering systems

Procurement Notes

Verify the specific suffix (e.g., I/SS vs E/SS) against project requirements, as variations may exist regarding gain or dynamic range specifications. Confirm that the SSOP-24 package aligns with PCB footprint constraints. Ensure compliance with AEC-Q100 automotive standards if the application requires automotive-grade reliability. Check humidity sensitivity levels during storage and handling procedures.

Selection Notes

Select this component for single-phase metering applications requiring high accuracy and low cost. The integrated DSP reduces external processor load compared to generic ADC solutions. Consider the 1:500 dynamic range capability when designing for varying load conditions. The serial interface simplifies connection to host microcontrollers like AVR or similar architectures.

Part Context

The MCP3906 series belongs to Microchip's specialized data acquisition ADC/DAC product line focused on energy metering. It is designed to support international standards such as IEC 62053. The device serves as both a standalone meter solution and an analog front-end for more complex metering systems, offering a compact alternative to discrete component designs.

Replacement Considerations

MCP3906A-I/SS

FAQ

Does the MCP3906 include hardware for preventing current creep?

Yes, the chip includes an empty load threshold module specifically designed to prevent any current creep measurements.

What type of output does the MCP3906 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.