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有个问题没搞明白，ADS1248是24位AD转换芯片，如果最高位是符号位的话，那就是精度23位了？参考电压是2.048V的话，那转换出来的电压就是2.048/2^23 *AD ？还是2.048/2^24 *AD ？求大神详解。
根据如图所示来计算
最低有效位为Vref /PGA /(2的23次方 – 1) .注意输出是二进制补码
非常感谢~
