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[原创] ADI AD5676低功耗8通道16位DAC解决方案

关键词:数模转换器 DAC 工业控制 工业自动化 AD5676

时间:2015-05-13 10:29:56       作者:ADI       来源:中电网

ADI公司的AD5676R是低功耗8通道16位缓冲电压输出数模转换器(DAC),内置2.5V 2 ppm/˚C内部基准电压源和上电复位电路,采用多功能串行外设接口(SPI),时钟速率最高达50 MHz, 工作温度−40℃ 到+125℃,工作电压2.7 V到5.5 V,主要用在光收发器,基站功率放大器,过程控制(可编程逻辑控制[PLC]I/O卡),工业自动化和数据采集系统.本文介绍了AD5672R/AD5676R主要特性,功能框图,菊花链接图以及AD5676R评估板主要特性,框图,电路图和材料清单.

The AD5672R/AD5676R are low power, octal, 12-/16-bit buffered voltage output digital-to-analog converters (DACs). They include a 2.5 V, 2 ppm/℃ internal reference (enabled by default) and a gain select pin giving a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). The devices operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design. The AD5672R/AD5676R are available in a 20-lead TSSOP package and incorporate a power-on reset circuit and a RSTSEL pin that ensures that the DAC outputs power up to zero scale or midscale and remain there until a valid write. The AD5672R/AD5676R contain a power-down mode, reducing the current consumption to 1 μA typical while in power-down mode.

AD5672R/AD5676R主要特性:

High performance
High relative accuracy (INL): ±3 LSB maximum at 16 bits
Total unadjusted error (TUE): ±0.14% of FSR maximum
Offset error: ±1.5 mV maximum ..

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