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准备用ADS1220 做温度测量,精度在±0.2℃,那么官网上使用的是PT100,用PT1000提高精度是否可行,
另外由于外设较多,使用TPS7A4901,输出电流有点小了。最小500mA,输入电压4-28V。能否推荐一款性价比高 的又可以不用多少外设就可以稳定供给ADS1220,谢谢!
TPS7A47
PT1000的输出阻值范围较宽,输入到ADC的信号可以相对较大。在同样分辨率情况下,可以实现细微信号的识别。