The MCP3919 is a 3V three channel Analog-Front-End (AFE) containing three simultaneous 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 requiring 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 Simultaneous 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
• 4 MHz Maximum Sampling Frequency
• 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
• AEC-Q100 Grade 1