I would like to ask, in the 8-channel differential mode, is there buffer AD8065 in both differential channels IN+and IN-respectively? Thank you for your reply.
There is an AD8065 buffer on both the Ain+ and Ain- signal paths.
Does it mean to input buffer and front buffer in your notes?
Does the input buffer and the front buffer mean the same thing in the CN0269 note?
Input buffer and front buffer mean the same thing in this note. Apologizes for the confusion.
Thanks for your help.
When I used CN0269 to measure DC voltage, I found two problems:1. When the input voltage is positive, the measured voltage is negative. Why?
2. When I use different frequencies to measure positive DC voltage, the higher the frequency is, the lower the measured voltage is. What's the matter? For example, when I input the DC voltage, when the sampling frequency is set to 1KHz, the result is -4.961V, but when the frequency is increased to 12KHz, the result is - 4.9586V, LSB = 31uV. The error is very large.