The MCP3918 is a 2.7V to 3.6V single channel Analog Front End (AFE) containing a Delta-Sigma Analog-to-Digital Converter (ADC), PGA, internal voltage
reference, modulator output block, and highspeed 20 MHz SPI compatible serial interface. For polyphase shunt based energy meters, the MCP3918 2-wire serial
interface greatly reduces system cost requiring only a single bidirectional isolator per phase. The MCP3918 is capable of interfacing a large variety of voltage and current sensors including shunts, current transformers, Rogowski coils and Hall effect sensors

• 16/24-bit Resolution Delta-Sigma A/D Converter
• Flexible serial interface that includes both SPI and a simple 2-wire interface ideal for polyphase shunt energy meters
• 93.5 dB SINAD, -106.5 dBc THD
• 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
• 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
• 24-bit Digital Offset and Gain Error Correction
• 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
• AEC-Q100 Grade 1