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六通道A/D转换器MCP3903数据表
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The MCP3903 is a six-channel Analog Front End （AFE） containing three pairs made out of two synchronous sampling Delta-Sigma Analog-to-Digital Converters （ADC） with PGA， a phase delay compensation block， internal voltage reference， and high-speed 10 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 register as well as six 24-bit 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 Direct Memory Access （DMA） of an MCU and with separate Data Ready pins that can directly be connected to the Interrupt Request （IRQ） input of an MCU. The MCP3903 is capable of interfacing to a large variety of voltage and current sensors including shunts， current transformers， Rogowski coils， and Hall-effect sensors.
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