请问ADS5263能够采集负向电压吗?
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,
从手册第8页可以看到输入电压的范围:共模电压要在1.5V左右,而差模的峰峰值可以4V。所以输入电压必须正的,但由于是差分输入,负向输入端比正向大的话在芯片看来是负向。可以使用一个差分运放或者全差分运放进行调理,进行电平搬移。VCM引脚输出的就是1.5V的共模电压,供给调理电路。
http://www.ti.com.cn/lsds/ti_zh/amplifiers-linear/fully-differential-amplifier-products.page