VCP1001 Resolution

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ProtonTim
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VCP1001 Resolution

Post by ProtonTim »

The VCP1001_0 says 10bits on the case, but in the specs it says it has 200uV resolution across a +5/-5 range. 10V/2^10 = 9.7mV, what am I missing?
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mparadis
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Re: VCP1001 Resolution

Post by mparadis »

The VCP1001 is oversampled, so the effective resolution is much higher than the base 10-bit resolution of the ADC. We recognized that this was confusing so we removed it from the product name, but the enclosure couldn't be changed for our existing stock.
ProtonTim
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Re: VCP1001 Resolution

Post by ProtonTim »

Thank you for the clarification.

The 20 bit ADC (VCP1000_0) states that is has a Measurement Error Max 0.01%. Does that mean the reported measurements can be off by as much as 0.0001 * 80V = 8mV even though it has 77μV resolution?

Would this error only occur at this magnitude at full scale?

If I were to use the VCP1000_0 to measure two voltages that were offset by 4.000V what is the worst differential error I should expect with such a measurement? (0.4mV?)

Thank you for your help on this.
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