Energy-Measurement Analog Front End (AFE) MCP3911

Product Announcement from Microchip Technology, Inc.

The MCP3911 is capable of interfacing a large variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensors.


  • Two Synchronous Sampling 16/24-bit Resolution
    Delta-Sigma A/D Converters
  • 94.5 dB SINAD, -106.5 dBc Total Harmonic Distortion
  • 2.7V - 3.6V AVDD, DVDD
  • Programmable Data Rate up to 125 ksps
    - 4 MHz Maximum Sampling Frequency
  • Oversampling Ratio up to 4096
  • Ultra Low Power Shutdown Mode with <2 μA
  • -122 dB Crosstalk between the Two Channels
  • Low Drift 1.2V Internal Voltage Reference: 7 ppm/°C
  • Differential Voltage Reference Input Pins
  • High Gain PGA on Each Channel (up to 32V/V)
  • Phase Delay Compensation with 1 μs Time Resolution
  • Separate Modulator Output Pins for Each Channel
  • Separate Data Ready Pin for Easy Synchronization
  • Individual 24-bit Digital Offset and Gain Error Correction for Each Channel
  • High-Speed 20 MHz SPI Interface with Mode 0,0 and 1,1 Compatibility
  • Continuous Read/Write Modes for Minimum Communication
  • Low Power Consumption (8.9 mW at 3.3V, 5.6 mW at 3.3V in low-power mode, typical)
  • Available in Small 20-lead QFN and SSOP Packages,
    Pin-to-pin Compatible with MCP3901
  • Extended Temperature Range: -40°C to +125°C