FPGA range

[Ecosmose_CNRS]

Can I programm FPGA of M Series...

I make an acquisition of a pression sensor tension with amplitude : 20 mV
noise before filter +-20 mV
            after flilter    -+2mV

mode NRSE used



Accurancy calcul 

Exactitude = Mesure.(Gain d’Erreur) + Gamme*(Erreur d’Offset) + Incertitude du bruit

le résultat approche les +- 2,3 mV

Extract from spécifications PCI 6229
For example, on the 10 V range, the absolute accuracy at full scale is as follows:
GainError = 75 ppm + 25 ppm · 1 + 5 ppm · 10 GainError = 150 ppm
OffsetError = 20 ppm + 57 ppm · 1 + 76 ppm OffsetError = 153 ppm
NoiseUncertainty RandomNoise ⋅ 3
 For a coverage factor of 3 σ and averaging 100 points.
NoiseUncertainty = 73 μV

AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty AbsoluteAccuracy = 3100 μV

I would like to set the range ADC to +-0,2 V (FPGA) and no more to 10 V. The accurancy result would be  181,2 μV ?
Please could you confirm my calcul and this way of think ?
calcul :
For example, on the 0,2 V range, the absolute accuracy at full scale is as follows: 
GainError = 135 ppm + 25 ppm · 1 + 5 ppm · 10 GainError = 210 ppm
OffsetError = 80 ppm + 175 ppm · 1 + 76 ppm OffsetError = 311 ppm

 AbsoluteAccuracy = 0,2 V · (210) + 0,2 V · (331) + 73 μV  = 181,2 μV

If the result ...et si oui quel est le moyen d'adapter la plage d'entrée du CAN avec le FPGA..(je travaille sous LabVIEW 7.1) driver NI DAQmx 7.4

je rappele que la PCI 6229 a plusieurs gamme (range) de Input range ...................................... ±10 V, ±5 V,±1 V, ±0.2 V

la version francaise de mon probleme ici

[Ecosmose_CNRS]

No idea ? no comments ?