--- In "j.chitte" <> wrote:
>
> Not getting anyway fast with this.
>
> I see continuous +/- 2mV which is expected 2LSB variations however
> frequent +/- 6mV spikes are spoiling my day.
>
> Nobody here tried to get accurate ADC on the 7250?
>
> Thx.
>
What sample rate are you using? I tend to oversample and average my A/
D readings to reduce this type of spurious periodic noise. This all
depends on the signal being measured and the current sample rate.
Without knowing the exact design, the causes for these noise spikes
are difficult to pin down, but if you're refering to the A/D on the
TS-72xx board itself I doubt that the layout was aimed at getting the
full performance of the A/D - I don't know if they implemented a
separate analogue ground plane around the chip, It may be that it's
picking up noise from the digital circuitry.
PJE
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