The MCP3919 is a 3V three channel Analog-Front-End (AFE) containing three synchronous sampling Delta-Sigma Analog-to-Digital Converters (ADC), three PGAs, phase delay compensation block, internal voltage reference, digital offset and gain error calibration registers and high-speed 20 MHz SPI compatible serial interface.  A 2-wire serial interface mode greatly reduces system cost by requring only a single bidirectional isolator per phase. The MCP3919 AFE is capable of interfacing to a variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensors

  Three Synchronous Sampling 24-bit Delta-Sigma A/D Converters

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

  Enables 0.1% Typical Active Power Measurement Error over a 10,000:1 Dynamic Range

  2.7V - 3.6V AVDD, DVDD

  Programmable Data Rate up to 125 ksps

  4 MHz Maximum Sampling Frequency

  Advanced Security Features

  16-Bit CRC Checksum and Interrupt Alert

  Register Map Lock

  Oversampling Ratio up to 4096

  Ultra Low Power Shutdown Mode with <10 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 Data Ready Pin for Easy Synchronization

  Individual 24-bit Digital Offset and Gain Error Correction for Each Channel

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

  Continuous Read/Write Modes for Minimum Communication

  Available in 28-Lead QFN and SSOP Packages