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(一)特点该数字温度计是用硅二极管作为热敏元件,经5G14433三位半模数变换器(ADG)变换成数字量显示温度.主要特点有:1.由于使用5G14433三位半ADC来直接变换热敏传感器的相应模拟电压,所以不必用放大器,因而没有放大器及其温度漂移所引起的误差.2.5G14433具有自动零补偿和自动极性转换,便于指示正、负温度.3.用硅二极管作为温度传感器,测量范围可达±200℃以上.并能与ADC直接连接使用.4.ADC输入阻抗高(达10千兆欧以上),二极管传感器的偏置电流可以设置成小电流而不使ADC引起误差,因而传惑器本身的热效应也大大减小.5.可用单电源工作,使用两只5G14稳压器集成
(A) Features The digital thermometer is a silicon diode as a thermal element, the 5G14433 three half-analog-digital converter (ADG) into a digital display temperature. The main features are: 1. As a result of the use of 5G14433 three and a half ADC to direct Change the corresponding analog voltage thermal sensor, so do not use the amplifier, so there is no amplifier and its temperature drift caused by the error .2.5 G14433 with automatic zero compensation and automatic polarity conversion, easy to indicate positive and negative temperature .3. With silicon diodes As a temperature sensor, the measurement range can be up to ± 200 ° C and can be directly connected to the ADC. 4. With high input impedance (up to 10 gigaohms), the bias current of the diode sensor can be set to a small current ADC caused the error, so the thermal effect of the sensor itself is greatly reduced .5 available single-supply operation, the use of two integrated 5G14 regulator