In article ,
Jim Thompson wrote:

It's an amplifier with less than 10KHz bandwidth (to get quick
settling), gain of 300, but it's essentially a DC signal.

Depends if you are the customer or supplier. If you
are the supplier then you want the widest barn door.

Assume Gain = K = dVout/dVin, measured over the
widest possible swing of Vout, dVoutmax/dVinmax.

"0.25% linearity" is the departure from the straight
line as a percentage of Voutmax... = Voutmax/400.

"DC-offset" is the value of Vout when Vin=0 for the
particular device under test.

Vout = K*Vin +/- (Voutmax/400) +/- (DC-offset).

So to verify any particular DUT.

Measure and record DC-offset and K for that device.

Then measure Vout for a range of Vin = 0 to Voutmax/K.

If the DUT is in spec, then for all plotted values of Vin:-


(Vout - K*Vin -/+ DC-offset) = +/- Voutmax/400

--
Tony Williams.