Hello,
We selected the TL431C for our design. However, we are having some issues in our system, and may have traced it back to this device. It has 2% tolerance, but we need some clarification on what that means. The output voltage range in the data sheet is 2440mV to 2550mV. That is about 2% on either side of 2495mV. However, does the 2% mean it could be 2% below 2440mV to 2% above 2550mV?
The reason we ask is that we are measuring a range of 2415mV up to 2496mV on a handful of units that we've tested.
Please let us know what we should be expecting. If needed, we may have to go to the TL431D with a tighter tolerance.
Thanks for your help.