TI DAC8775自适应功率管理四路DAC解决方案
摘要:TI公司的DAC8775是自适应功率管理四路16位可编程电流输出和电压输出的数模转换器(DAC),工作电压12 V – 36 V,DNL: ±1 LSB,工作温度–40°C 到 +125°C,主要用在4-mA-20-mA电流回路,模拟输出模块,可编程逻辑控制器(PLC),建筑物自动化,传感器发送器和过程控制.本文介绍了DAC8775主要特性,框图,以及评估模块DAC8775EVM主要特性,框图,电路图,材料清单和PCB元件布局图.
The DAC8775 is a quad-channel precision, fullyintegrated, 16-bit, digital-to-analog converter (DAC)with adaptive power management, and is designed tomeet the requirements of industrial controlapplications. The adaptive power managementcircuit, when enabled, minimizes the powerdissipation of the chip. When programmed as acurrent output, the supply voltage on the currentoutput driver is regulated between 4.5 V and 32 Vbased on continuous feedback of voltage on thecurrent output pin via an integrated buck/boostconverter. When programmed as a voltage output,this circuit generates a programmable supply voltagefor the voltage output stage (±15 V). DAC8775 alsocontains an LDO to generate the digital supply (5 V)from a single power supply pin.
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