3V双通道模拟前端MCP3910数据表

　　The MCP3910 is a 3V two-channel Analog Front End （AFE）， containing two synchronous sampling deltasigma， Analog-to-Digital Converters （ADC）， two programmable gain amplifiers （PGA）， phase delay compensation block， low-drift internal voltage reference， digital offset and gain errors calibration registers， and high-speed 20 MHz SPI-compatible serial interface. The MCP3910 ADCs are fully configurable with features such as： 16-/24-bit resolution， Oversampling Ration （OSR） from 32 to 4096， gain from 1x to 32x， independent Shutdown and Reset， dithering and autozeroing. Communication is largely simplified with 8-bit commands， including various continuous read/write modes and 16-/24-/32-bit data formats that can be accessed by the Direct Memory Access （DMA） of an 8-/16- or 32-bit MCU， and with the separate data ready pin that can directly be connected to an Interrupt Request （IRQ） input of an MCU. The MCP3910 includes advanced security features to secure the communications and the configuration settings， such as a CRC-16 checksum on both serial data outputs and on the static register map configuration. It also includes a register-map lock through an 8-bit password to stop unwanted write commands from processing. For polyphase shunt-based energy meters， the MCP3910 2-Wire serial interface greatly reduces system cost， requiring only a single bidirectional isolator per phase. The MCP3910 is capable of interfacing a variety of voltage and current sensors， including shunts， current transformers， Rogowski coils and Hall-effect sensors.