Other Parts Discussed in Thread: TLC2272, TLC2272A, TLC2272AM
I am conducting a error analysis on a circuit containing the TLC2272M as a voltage follower in the configuration.I read the datasheet provided at the link http://www.ti.com/lit/ds/symlink/tlc2272m.pdf , and was wondering, on page 8 which input offset voltage must I use; the one for TLC2272 or TLC2272A.
My second question is regarding Figure 6 on Page 14, which is tilted Input Offset Voltage versus Common mode voltage. I wanted to confirm that the Input Offset Voltage does change with the polarity of an input signal to a voltage follower. Also I assume this not a graph highlighting the worst case offset voltage, it would be of great help if you could estimate what the graph would look like in a worst case scenario.
Also would increasing the dual rail supply above+/-5V to +/-6.9V, effect the shape of the graph, i.e. would the linear region of the graph extend towards +/-6.9V.
When reading the TI ebook “The signal: A compendium of blog posts on op amp design topics”, I came across a sentence that I would to understand more about; on Page 5 it refers to that rail to rail op-amps as follows “It can also cause distortion in alternating current (AC) applications. But again, distortion will only occur if the common-mode input voltage crosses the transition between stages.”. Could you explain if applicable how this related to the Input Offset Voltage versus Common mode voltage graph for the TLC2272M
Looking forward to hearing with you.
Regards,
Nigel Savio Fernandes