MCP3905LT-I/SS

Overview

The MCP3905LT-I/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-lead SSOP package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. It provides a dynamic range of 500:1 with a measurement error of 0.1%. The input impedance is specified at 390 kΩ, and the supply current is 2.7 mA. Digital I/O levels are defined with a high voltage of 2.4 V and a low voltage of 0.85 V.

Feature Summary

• Integrates a Sigma-Delta ADC for high-resolution energy measurement
• Supports single-phase power metering applications
• Includes digital signal processing capabilities tailored for metering

Applications

• Single-phase energy metering systems
• Power management monitoring circuits
• Utility metering devices

Procurement Notes

Verify the specific suffix 'LT' against the official Microchip datasheet to confirm tape-and-reel packaging and automotive qualification status. Ensure the 'I' suffix correctly denotes the industrial temperature range. Cross-reference the 24-SSOP package dimensions with the mechanical drawings to guarantee board layout compatibility. Confirm RoHS compliance requirements match the project specifications before finalizing procurement.

Selection Notes

Select this component for single-phase applications requiring high accuracy and a wide dynamic range. The 24-SSOP package offers a compact solution for space-constrained designs. Verify that the required supply voltage aligns with the 4.5 V to 5.5 V operational window. Consider the digital interface compatibility with the host microcontroller when integrating the device into the system architecture.

Part Context

This part belongs to the MCP3905 family of energy metering ICs from Microchip Technology. It shares functional similarities with the MCP3906A but is optimized for single-phase configurations. The family includes variants with different packaging options such as tubes or reels. Development tools like the MCP3905EV evaluation board are available to assist in design validation and testing phases.

Replacement Considerations

The MCP3905AT-I/SS serves as a direct alternative within the same product family. Both parts share identical electrical characteristics and pinouts. Verify that the specific suffix variations do not introduce differences in packaging or qualification standards before substitution.