The MCP3910 is a 3V dual channel Analog-Front-End (AFE) containing two synchronous sampling Delta-Sigma Analog-to-Digital Converters (ADC), two PGAs, phase delay compensation block, internal voltage reference, modulator output block, and high speed 20 MHz SPI compatible serial interface. For poly-phase shunt based energy meters, the MCP3910 2-wire serial interface greatly reduces system cost by requiring only a single bidirectional isolator per phase. The MCP3910 is capable of to a 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

  Flexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy meters

  93.5 dB SINAD, -107 dBc THD, 112 dBFS SFDR 

  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: 9 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

  Available in Small 20-lead QFN and SSOP Packages

  Specifications valid down to -45°C operation