Hi!
Quick question on Figure 5-4 (Offset Voltage vs Common-Mode Voltage) of the datasheet for the OPA2328.
I assume the different colours are for different temperatures? Is that correct and if so, what temperature does each color represent?
Thanks and Best Regards
Jerry Molnar
Jerry,
The default conditions of 25 deg C for all graphs are shown at the top of the page; thus, unless otherwise noted on or near the graph itself they apply to all figures.
Therefore, Fig 5-4 shows five random units change of the offset with input common-mode voltage. The offset in red circle shows offset at mid-supply (under Vos condition).
The random distribution of the offset voltage at 25C for Vs of 2.2V and 5.5V is shown below.
Jerry,
The input voltage offset conditions are shown at the top of the page: Vcm=Vout=Vs/2 (mid-supply) - see below.
What this means is that for a single supply Vs=2.2V, Vcm=Vout=1.1V or for +/-1.1V dual supply Vcm=Vout=0.
