ADI AD5791 20位电压输出数模转换解决方案

ADI 公司的AD5791是单路20位电压输出数模转换器(DAC),双极工作电压高达33V,正基准电压从5V到VDD-2.5V,负基准电压从VSS+2.5V到0V,精度1ppm,噪音频谱密度7.5 nV/√Hz,温度漂移0.05 ppm/°C,主要用在医疗仪器,测试测量,工业控制和高端科学和航空仪表.本文介绍了AD5791产品亮点和主要特性, 方框图和菊花链接方框图,以及典型应用电路图和EVAL-AD5791评估板电路图,材料清单和PCB元件布局图.

The AD5791 is a single 20-bit, unbuffered voltage-output DAC that operates from a bipolar supply of up to 33 V. The AD5791 accepts a positive reference input in the range 5 V to VDD − 2.5 V and a negative reference input in the range VSS + 2.5 V to 0 V. The AD5791 offers a relative accuracy specification of ±1 LSB max, and operation is guaranteed monotonic with a ±1 LSB DNL maximum specification.

The part uses a versatile 3-wire serial interface that operates at clock rates up to 35 MHz and that is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V and in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides an output clamp feature that places the output in a defined load state.

AD5791产品亮点:

1 ppm Accuracy.
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