MCP3918
Description
The MCP3918 is a 3V single-channel Analog Front End (AFE), containing one Delta-Sigma Analog-to-Digital Converter (ADC), one Programmable Gain Amplifier (PGA), phase delay compensation block, low-drift internal voltage reference, digital offset and Gain Error Calibration registers, and high-speed 20 MHz SPI compatible serial interface. The MCP3918 ADC is fully configurable with features such as: 16-/24-bit resolution, Oversampling Ratio (OSR) from 32 to 4096, gain from 1x to 32x, independent shutdown and Reset, dithering and auto-zeroing.
Key Features
- One 24-Bit Resolution Delta-Sigma A/D Converter
- 93.5 dB SINAD, -107 dBc Total Harmonic Distortion (THD) (up to 35th harmonic), 112 dB Spurious-Free Dynamic Range (SFDR)
- Flexible Serial Interface that Includes Both SPI and a Simple Two-Wire Interface Ideal for Polyphase Shunt Energy Meters
- Advanced Security Features: - 16-Bit Cyclic Redundancy Check (CRC) Checksum on All Communications for Secure Data Transfers - 16-Bit CRC Checksum and Interrupt Alert for Register Map Configuration - Register Map Lock with 8-Bit Secure Key
- 2.7V-3.6V AVDD, DVDD
- Programmable Data Rate, Up to 125 ksps: - 4 MHz Maximum Sampling Frequency - 16 MHz Maximum Master Clock
- Oversampling Ratio, Up to 4096
- Ultra Low-Power Shutdown Mode with < 10 µA
- Low-Drift 1.2V Internal Voltage Reference: 9 ppm/°C
- Differential Voltage Reference Input Pins
