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AD7417ARZ Datasheet(PDF) 10 Page - Analog Devices |
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AD7417ARZ Datasheet(HTML) 10 Page - Analog Devices |
10 / 24 page AD7416/AD7417/AD7418 Rev. I | Page 10 of 24 TERMINOLOGY Relative Accuracy Relative accuracy or endpoint nonlinearity is the maximum deviation from a straight line passing through the endpoints of the ADC transfer function. Differential Nonlinearity This is the difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. Offset Error This is the deviation of the first code transition (0000…000) to (0000…001) from the ideal, that is, GND + 1 LSB. Offset Error Match This is the difference in offset error between any two channels. Gain Error This is the deviation of the last code transition (1111…110) to (1111…111) from the ideal, that is, VREF − 1 LSB, after the offset error has been adjusted out. Gain Error Match This is the difference in gain error between any two channels. Track-and-Hold Acquisition Time Track-and-hold acquisition time is the time required for the output of the track-and-hold amplifier to reach its final value, within ±½ LSB, after the end of conversion (the point at which the track-and-hold returns to track mode). It also applies to situations where a change in the selected input channel takes place or where there is a step input change on the input voltage applied to the selected AIN input of the AD7417 or AD7418. It means that the user must wait for the duration of the track-and- hold acquisition time after the end of conversion, or after a channel change or step input change to AIN before starting another conversion, to ensure that the part operates to specification. |
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