ADS1247的差分输入通道是2个,为什么单端输入通道是3个,这个一直没有看明白?哪位大虾指点一下。谢谢!
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
你好!
由于ADS1247没有独立的AINCOM引脚,作为单端输入的时候,其中至少一个输入引脚应该连接至PGA输入的AINN端:
Bits 5:3 MUX_SP2:0
Positive input channel selection bits.
000 = AIN0 (default)
001 = AIN1
010 = AIN2
011 = AIN3
100 = AIN4 (ADS1248 only)
101 = AIN5 (ADS1248 only)
110 = AIN6 (ADS1248 only)
111 = AIN7 (ADS1248 only)
Bits 2:0 MUX_SN2:0
Negative input channel selection bits.
000 = AIN0
001 = AIN1 (default)
010 = AIN2
011 = AIN3
100 = AIN4 (ADS1248 only)
101 = AIN5 (ADS1248 only)
110 = AIN6 (ADS1248 only)
111 = AIN7 (ADS1248 only)
是这个位置配置么,吧其中一个配置为Positive input ,另一个配置为Negative input么???
那我怎么知道它选择的是哪个
VREFP1/4
VREFN1/4
VREFP0/4
VREFN0/4
AVDD/4
AVSS/4
DVDD/4
DGND/4
关于配置为单端输入的我还是没太明白
您好,请问如何将ADS1247在睡眠时候功耗降到最低,我看到官方说在“禁用 PGA 后的占空比模式下运行功耗可低至 120µA”,请问如何做到