The MCP3919 is a 3V three channel Analog-Front-End (AFE) containing four synchronous sampling Delta-Sigma Analog-to-Digital Converters (ADC), three PGAs, phase delay compensation block, internal voltage reference, digital offset and gain error calibration registersand high-speed 20 MHz SPI compatible serial interface. A 2-wire serial interface mode greatly reduces system cost byrequring only a single bidirectional isolator per phase. The MCP3919 AFEis capable of interfacing to a variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensorsThree Synchronous Sampling 24-bit Delta-Sigma A/D Converters93.5 dB SINAD, -107 dBc THD, 112 dBFS SFDREnables 0.1% Typical Active Power Measurement Error over a 10,000:1 Dynamic Range2.7V - 3.6V AVDD, DVDDProgrammable Data Rate up to 125 ksps 4 MHz Maximum Sampling FrequencyAdvanced Security Features 16-Bit CRC Checksum and Interrupt Alert Register Map LockOversampling Ratio up to 4096Ultra Low Power Shutdown Mode with <10 µA-122 dB Crosstalk between the Two ChannelsLow Drift 1.2V Internal Voltage Reference: 9 ppm/°CDifferential Voltage Reference Input PinsHigh Gain PGA on Each Channel (up to 32V/V)Phase Delay Compensation with 1 µs Time ResolutionSeparate Data Ready Pin for Easy SynchronizationIndividual 24-bit Digital Offset and Gain Error Correction for Each ChannelFlexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy metersContinuous Read/Write Modes for