TI DAC8760 PLC 16位模拟输出模块参考设计方案

TI公司的DAC7760和DAC8760是低成本全集成12位和16位数模转换器(DAC),设计用于满足工业过程控制的要求,输出电流在4 mA-20 mA,0 mA- 20 mA或0 mA - 24 mA或输出电压在0 V-5 V,0 V-10 V,±5 V, 或±10 V,工作温度从–40℃到+125℃,主要用在4 mA-20 mA电流回路,模拟输出模,建筑物自动化相关设备,环境监测和可编逻辑控制器(PLC).本文介绍了DAC7760和DAC8760主要特性,框图, DACx760输出模块(AO)框图和DACx760评估模块主要特性,框图,电路图,材料清单与PCB元件布局图,以及PLC 16位模拟输出(AO)模块参考设计主要特性,电路图和材料清单.
16-Bit Analog Output Module Reference Design for Programmable Logic Controllers (PLC)
The DAC7760 and DAC8760 are low-cost, precision, fully-integrated, 12-bit and 16-bit digital-to-analog converters (DACs) designed to meet the requirements of industrial process-control applications. These devices can be programmed as a current output with a range of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA; or as a voltage output with a range of 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V, with a 10% overrange (0 V to 5.5 V, 0 V to 11 V, ±5.5 V, or ±11 V). Both current and voltage outputs can be simultaneously enabled while being controlled by a single data register.
These devices include a power-on-reset function to ensure powering up in a known state (both IOUT and VOUT are disabled and in a Hi-Z state). The CLR and CLR-SEL pins set the voltage outputs to zero-scale or midscale, and the current output to the low end of the range, if the output is enabled. Zero and gain registers can be programmed to digitally calibrate the device in the end system. The output slew rate is also programmable by register. These devices can superimpose an external HART signal on the current output and can operate with either a single +10-V to +36-V supply, or dual supplies of up to ±18 V. All versions are available in both 6-mm × 6-mm QFN-40 and TSSOP-24 packages.
DAC8760主要特性:
Current Output: 4 mA to 20 mA; 0 mA to 20 mA; 0 mA to 24 mA
Voltage Output:
0 V to 5 V; 0 V to 10 V; ±5 V; ±10 V
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