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[原创]Maxim MAX22000可配置模拟输入-输出解决方案

关键词:工业控制 过程控制 Delta-Sigma ADC DAC PLC Maxim MAX22000

时间:2020-10-20 15:02:22       来源:中电网

Maxim公司的MAX22000是工业级可配置模拟输入/输出器件,可作为电压输入或输出,或是电流输入或输出.器件提供有快速设定时间的18位DAC,以及24位delta-sigma ADC. DAC和ADC可单独选择内部或外部基准电压,支持具有低噪音可编增益放大器(PGA)的ADC,其高压和低压输入范围支持RTD和热电偶测量.还提供其它辅助输入,以测量板上的冷结温度.AOVM模式在室温的精度为0.02%FSR,±50C温度变化时的精度为0.1%FSR,内部基准为5ppm/C.工作电压从2.7V到3.6V,工作温度-40C到 +125C, 9mm x 9.5mm 64引脚LGA封装.主要用在分布控制系统,过程控制,可编逻辑控制器(PLC)和可编自动化控制器(PAC).本文介绍了MAX22000主要优势和特性,功能框图和应用框图,以及评估板MAX22000 EVK主要特性,框图,电路图,材料清单和PCB设计图.

 

The MAX22000 is an industrial-grade configurable analoginput/output device that can be configured on-the-fly insoftware as a voltage input or output, or current input oroutput. Additional inputs are available to measure otheranalog signals.

The device offers an 18-bit DAC with fast settling time aswell as a 24-bit delta-sigma ADC. The ADC and DAC canindividually choose between an internal or an external reference.

The MAX22000 supports the ADC with a low-noise programmablegain amplifier (PGA), with high-voltage andlow-voltage input ranges to support RTD and thermocouplemeasurements. Additional auxiliary inputs are providedto measure cold junction temperatures on-board.

The MAX22000 communicates through a high speed20MHz SPI bus for..

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