Two Channel Analog Front End

The MCP3901 is a dual channel Analog front end (AFE) containing two synchronous sampling delta-sigma Analog-to-digital Converters (ADC), two PGAs phase delay compensation block, internal Voltage Reference Modulator output block, and high-speed 20 MHz SPI compatible serial Interface The converters contain a proprietary dithering algorithm for reduced idle Tones and improved THD. The internal Register map contains 24-bit wide ADC data words, a Modulator output byte as well as six writable control Registers to program gain, over-sampling ratio, phase, resolution, dithering, shut-down, reset and several Communication features. The Communication is largely simplified with various continuous read modes that CAN be accessed by the DMA of a MCU and with separate data ready pin that CAN directly be connected to an IRQ input of a MCU. The MCP3901 is capable of interfacing to a large variety of voltage and Current Sensors including shunts, current transformers, Rogowski coils, and Hall effect Sensors By Microchip Technology Inc.