AD7873ACP datasheet(8/28 Pages) AD

8 / 28 page

AD7873

Rev. D | Page 8 of 28

TERMINOLOGY

Integral Nonlinearity

This 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, a point 1 LSB

below the first code transition, and full scale, a point 1 LSB

above the last code transition.

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 (00 . . . 000) to

(00 . . . 001) from the ideal, that is, AGND + 1 LSB.

Gain Error

This is the deviation of the last code transition (111 . . . 110) to

(111 . . . 111) from the ideal (that is, VREF – 1 LSB) after the offset

error is adjusted out.

Track-and-Hold Acquisition Time

The track-and-hold amplifier enters the acquisition phase on

the fifth falling edge of DCLK after the START bit has been

detected. Three DCLK cycles are allowed for the track-and-hold

acquisition time. The input signal is fully acquired to the 12-bit

level within this time even with the maximum specified DCLK

frequency. See the Analog Input section for more details.

On-Resistance

This is a measure of the ohmic resistance between the drain and

source of the switch drivers.

AD7873ACP Datasheet(PDF) 8 Page - Analog Devices