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对于温度、压力、流量、pH、重量、速度、位移等参数的检测或控制,常需用传感器分别将被测或被控参数转变成电量,并放大成0～5伏的模拟量电压。在微机处理系统中,需先将现场采集的模拟量转变成对应的数字量才能输入微机,处理这个任务常由A/D转换片来完成。ADC1210(1211)是常用的高精度的十二位A/D片,它有一个模拟输入通道,能将输入通道上的模拟量转换成十二位的二进制数字量。ADC1210与1211完全一样(包括引脚、接法等),仅精度不同,1210具有十二位精度,而1211只有十位精度。
For the detection or control of temperature, pressure, flow rate, pH, weight, speed, displacement and other parameters, it is often necessary to convert the measured or controlled parameters into electric quantities respectively by transducers and amplify them into analogue voltages of 0-5V. In the computer processing system, the need to first field analog acquisition into the corresponding digital to enter the computer, to deal with this task often by the A / D converter chip to complete. The ADC1210 (1211) is a popular, high-precision twelve-bit A / D chip that has an analog input channel that converts the analog input on the input channel into a twelve-bit binary digital volume. The ADC1210 is exactly the same as the 1211 (including pins, connections, etc.), with only different resolutions. The 1210 has twelve bits of precision, while the 1211 has ten bits of precision.