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[原创] ADI AD5679R 16路16位nanoDAC+解决方案

关键词:无线通信 基站 过程控制 工业自动化 数据采集系统 AD5679R

时间:2019-09-25 11:26:09       来源:中电网

ADI公司的AD5679R是低功耗16路16位缓冲电压输出的数模转换器(nanoDAC),集成了2.5V 2 ppm/℃内部基准电压(默认使能),它的增益选择引脚可获得输出电压2.5V(增益=1)或5V(增益=2).器件工作电压从2.7V到5.5V.器件具有高性能和相对精确度(INL)在16位时为±4 LSB,TUE为FSR的±0.14%,失调误差±1.5 mV,增益误差为FSR的±0.06%,2.5V基准电压温度系数低飘移,典型为2 ppm/℃,短路电流40mA,工作温度−40℃ 到+125℃,1.8V逻辑兼容,50MHz 带回读或菊化链的SPI,24引脚4mmx4mm RoHS兼容LFCSP封装,主要用在光收发器,基站功率放大器,过程控制(PLC输入/输出卡),工业自动化,和数据采集系统.本文介绍了AD5679R产品亮点和主要特性,功能框图,菊花链接到Motorola 68HC11连接图以及评估板EVAL-AD5679RSDZ主要特性,电路图,材料清单和PCB设计图.

The AD5679R is a low power, 16-channel, 16-bit, buffered voltage output, digital-to-analog converter (DAC) that includes a 2.5 V, 2 ppm/℃ internal reference (enabled by default), and a gain select pin, resulting in a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). The device operates from a single, 2.7 V to 5.5 V supply range and is guaranteed monotonic by design. The AD5679R is available in a 28-lead lead frame chip scale package (LFCSP) and incorporates a power-on reset (POR) circuit that ensures that the DAC outputs power up to and remains at zero- scale until a valid write. The AD5679R contains a power-down mode that reduces the current consumption to 2 μA typical when in power-down mode.

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