hello there,
i want to know the maximum drift value of TLV9062QDGKRQ1.
is the maximum value 1.6 or 2.8 ?
BRs,
Shubiao Wang
Hi Shubiao,
what you see is a typical distribution of offset voltage drifts gained over a certain lot size. This is not showing the maximum drift. If it was showing the maximum drift, you would find the data in the "Electrical characteristics" section:
But there's only given the typical drift of +/-0.53µV/°C.
The only maximum specification which is given in the datasheet is the maximum input offset voltage over the full temperature range. From this you can conclude on the maximum input offset voltage drift:
Assume your OPAmp is showing an input offset voltage of 0V at 25°C and 2mV at 125°C, which would be well within the datasheet specifications, then the OPAmp would show a temperature drift of input offset voltage of
(2mV - 0mV) / (125°C - 25°C) = 20µV / °C.
Of course, allthough such a high input offset voltage drift would be possible, it would be very unlikely. But it cannot be fully excluded.
If you need more safety refering to the maximum input offset voltage drift, you will need to take an OPAmp with specified maximum input offset voltage drift.
You might also want to read this very nice blog from Marek Lis on long term drifts:
Kai
