Datasheet

AD7879/AD7889
Rev. C | Page 12 of 40
TERMINOLOGY
Differential Nonlinearity (DNL)
DNL is the difference between the measured and the ideal
1 LSB change between any two adjacent codes in the ADC.
Integral Nonlinearity (INL)
INL is the maximum deviation from a straight line passing
through the endpoints of the ADC transfer function. The
endpoints of the transfer function are zero scale at 1 LSB below
the first code transition and full scale at 1 LSB above the last
code transition.
Gain Error
Gain error is the deviation of the last code transition
(111 … 110 to 111 … 111) from the ideal (V
REF
− 1 LSB)
after the offset error has been calibrated out.
Offset Error
Offset error is the deviation of the first code transition
(00 … 000 to 00 … 001) from the ideal (AGND + 1 LSB).
On Resistance
On resistance is a measure of the ohmic resistance between the
drain and the source of the switch drivers.