MCP3911A0-E/SS

Analog Front End (AFE) Overview

The MCP3911A0-E/SS is a dual-channel Analog Front End (AFE) designed for single-phase energy metering and power measurement. It integrates two synchronous sampling 16/24-bit Delta-Sigma ADCs, programmable gain amplifiers (PGA), phase delay compensation, and a low-drift internal voltage reference. Operating on a 2.7V to 3.6V supply, the device supports data rates up to 125 ksps with a maximum sampling frequency of 4 MHz. Key performance metrics include a typical SINAD of 94.5 dB, THD of -106.5 dBc, and channel crosstalk of -122 dB. The component communicates via a high-speed 20 MHz SPI interface and is housed in a 20-lead SSOP package.

Analog Front End (AFE) Feature Summary

• Two Synchronous Sampling 16/24-bit Resolution Delta-Sigma A/D Converters
• High-Gain Programmable Gain Amplifier (PGA) on Each Channel (up to 32V/V)
• Low-Drift 1.2V Internal Voltage Reference: 7 ppm/°C
• Phase Delay Compensation with 1 µs Time Resolution

Analog Front End (AFE) Applications

• Energy Metering and Power Measurement
• Automotive
• Portable Instrumentation
• Medical and Power Monitoring
• Audio/Voice Recognition

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix 'E/SS' against the manufacturer's current documentation to confirm the package type and temperature range. Confirm RoHS compliance status through official datasheets or product change notifications. Ensure that any design-in process accounts for the extended temperature range specifications (-40°C to +125°C) required for the target application environment.

Analog Front End (AFE) Selection Notes

Select this component when precise dual-channel simultaneous sampling is required for single-phase applications. The integrated PGA allows direct interfacing with various sensors like shunts, current transformers, Rogowski coils, and Hall effect sensors without external amplification. Consider the 20 MHz SPI interface speed and separate Data Ready pins for efficient MCU synchronization and interrupt handling.

Analog Front End (AFE) Part Context

The MCP3911A0-E/SS belongs to the MCP3911 family of analog front ends. It is pin-to-pin compatible with the MCP3901, facilitating potential upgrades or design variations within the same footprint. The device is qualified under AEC-Q100 standards, indicating suitability for automotive-grade reliability requirements alongside general industrial metering applications.

Analog Front End (AFE) Replacement Considerations

The MCP3911 is pin-to-pin compatible with the MCP3901. Verify functional equivalence regarding specific configuration bits and register maps before substitution.