Other Parts Discussed in Thread: REF3240, REF3425,
I have a prototype amplifier circuit (a handful of identical boards) which uses REF3240 at a supply voltage of 5V and work fine. Since I would like to reduce the supply voltage to 3.3V, I decided to replace REF3240 by REF3430. I had ordered 5 pieces of the latter as a sample, and another 5 pieced of REF3425. Now, none of the samples seem to work.
I tested some of them as a drop-in replacement on two of the mentioned boards, and the last remaining REF3430 on a breakout board with a supply voltage between 3.3V and 6.3V and a load of 12kOhm. Depending on the part being used, the output voltage may be 0V, 1.4V, 1.8V - but never the specified 2.5V or 3V. In one case, the output voltage even rised from 1.8V to 2.4V when reducing the load to 1kOhm.
An electronics engineer from a neighboring company double checked my results and came to the same conclusion.
Do you have any idea what may have gone wrong here? Are there any recent production issues known?