MCP3906AT-I/SS

Overview

The MCP3906AT-I/SS is a single-phase energy metering integrated circuit 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 a typical supply current of 2.7 mA. It provides a measurement error of 0.1% and includes an ultra-low drift internal voltage reference with temperature coefficients below 15 ppm/°C. The input impedance is specified at 390 kΩ, and the component functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates fixed-function on-chip digital signal processing for direct active power computation
• Includes high-output drivers capable of directly driving mechanical counters to reduce field failures
• Features an ultra-low drift internal voltage reference optimized for minimal temperature gradient across the operating range
• Provides frequency outputs proportional to average active power and high-frequency outputs proportional to instantaneous power

Applications

• Single-phase residential energy metering systems
• Smart grid electricity meters compliant with IEC 62053 standards
• Utility-grade metering devices requiring high reliability and low creep thresholds

Procurement Notes

Verify that the specific suffix 'AT' aligns with the required packaging configuration, as standard variants may utilize tube packaging while this designation indicates tape and reel delivery. Confirm the operational temperature grade matches the 'I' designation for industrial ranges. Ensure the SSOP-24 package dimensions are compatible with the target PCB footprint and that the SPI interface modes are supported by the host microcontroller architecture.

Selection Notes

Select this component for single-phase applications requiring precise energy measurement without external calibration components due to the integrated reference. The inclusion of onboard DSP simplifies firmware development by handling power calculations internally. Consider the 390 kΩ input impedance when designing front-end conditioning circuits. The device is suitable for designs prioritizing long-term stability and reduced mechanical counter wear through dedicated output drivers.

Part Context

This part belongs to the MCP3906 family of energy metering ICs from Microchip Technology. It is specifically engineered for single-phase utility metering applications. The series supports international standards such as IEC 62053, ensuring compatibility with global regulatory requirements. The device integrates analog-to-digital conversion, signal processing, and digital interfaces into a single compact package, reducing system complexity compared to discrete solutions.

Replacement Considerations

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