[原创] Maxim MAX5717／MAX5719 16位和20位DAC解决方案

Maxim公司的MAX5717/MAX5719是串行输入无缓冲16位和20位电压输出单极数模转换器(DAC),集成的反馈电阻和外接运放一起可用作双极工作,±4 LSB INL (Max, 16位), ±0.5 LSB DNL (Max, 16位),稳定时间750ns,输出噪音密度6 nv/√Hz,工作电压4.5V-5.5V,50MHz 3线SPI接口,主要用在测试和测量设备,自动测试设备(ATE),数据采集系统,过程控制和伺服回路,可编电压和电流源以及通信系统等.本文介绍了MAX5717/MAX5719优势和特性,框图和应用电路,以及MAX5717/MAX5719评估板主要特性,电路图,材料清单和PCB设计图.

The MAX5717 and MAX5719 are serial-input, unbuffered16 and 20-bit voltage-output unipolar digital-to-analogconverters (DACs) with integrated feedback resistorsthat allow bipolar operation when used with an externaloperational amplifier. These DACs provide low glitchenergy, low noise, tight bipolar resistor matching, and highaccuracy. The DACs feature ±4LSB INL (max, 16-bit) overthe temperature range of -40℃ to +105℃. Integratedprecision setting resistors make the DACs easy to use.

The MAX5717 and MAX5719 feature a 50MHz, 3-wireSPI™, QSPI™, MICROWIRE™, and DSP-compatibleserial interface.On power-up,the output resets to zero-scale, providingadditional safety for applications which drive valves orother transducers that need to be off on power-up. TheDAC output settles in 750ns and has a low offset andgain drift of ±0.1 ppm/℃ of FSR.
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