Other Parts Discussed in Thread: ADS1248
我原来使用的是ADS1248芯片,现在想增加一个ADS1247的替代方案,在硬件差异是ADS1248使用了REF1通道,而在ADS1247只能使用REF0通道,其它硬件外部配置均一致。在代码调试阶段发现仅更改寄存器MUX1的[4:3]为00,ADS1247不能正常测试,用万用表测得Vrefout电压是5.02V,而不是内部基准电压的2.048V。芯片的AVDD=DVDD=5V,AVSS=DGND=GND
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