MCP3905A-E/SS

Overview

The MCP3905A-E/SS is a single-phase energy metering integrated circuit manufactured by Microchip Technology. It features a Sigma-Delta Analog-to-Digital Converter architecture housed in a 24-pin SSOP package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an industrial temperature range from -40 °C to +125 °C. Key electrical specifications include a gain of 116, a dynamic range of 500:1, and a measurement error of 0.1%. The IC draws 2.7 mA of supply current and provides a high input impedance of 390 kΩ.

Feature Summary

• Integrated Sigma-Delta ADC for precise analog signal acquisition
• High dynamic range capability for accurate wide-range measurements
• Automotive-grade qualification ensuring reliability under harsh conditions
• Single-phase power metering functionality with active real power pulse output

Applications

• Smart electricity meters
• Energy monitoring systems
• Power quality analyzers
• Industrial power management units

Procurement Notes

Verify the specific suffix 'E/SS' confirms the extended temperature range up to 125 °C and tube packaging. Confirm AEC-Q100 automotive qualification status if required for your application. Ensure the ordering part number matches the exact pinout and functional requirements of the design.

Selection Notes

Select this component for single-phase applications requiring high accuracy and wide dynamic range. Consider the 24-SSOP package constraints for PCB layout. Verify that the 4.5 V to 5.5 V supply voltage aligns with the system power architecture. Check compatibility with existing SPI or parallel interfaces if interfacing with a microcontroller.

Part Context

This part belongs to the MCP3905 family of energy metering ICs from Microchip Technology. It is designed specifically for single-phase power measurement applications. The family includes variants with different temperature ratings and packaging options, such as the I/SS variant which has a lower maximum operating temperature of 85 °C.

Replacement Considerations

The MCP3905A-I/SS is a related variant but operates at a maximum temperature of 85 °C instead of 125 °C. Ensure thermal requirements are met before substituting. No other direct cross-manufacturer replacements are confirmed in the provided data.