We have 100 LM431CCM3 which oscillate.
And 5 LM431CCM3 from another production lot which are stable.
Cathode Current 10mA
Load Cap. 1nF
The load is a ceramic cap 1nF and nothing else.(usually a ref input of an ADC, but that makes no difference, tested!)
According to the datasheet the design should be fine and STABLE!
Shouldn't it be stable between 10pF and 10nF?
Any ideas why this happens?