Phidgets Forums

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?

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.

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.