AD7877ACPZ-500RL7(RevA) Ver la hoja de datos (PDF) - Analog Devices

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AD7877ACPZ-500RL7
(Rev.:RevA)

Touch Screen Controller

Analog Devices 

TERMINOLOGY

Integral Nonlinearity

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

The difference between the measured and the ideal 1 LSB

change between any two adjacent codes in the ADC.

AD7877

Offset Error

The deviation of the first code transition (00…000) to

(00…001) from the ideal (AGND + 1 LSB).

Gain Error

The deviation of the last code transition (111…110) to

(111…111) from the ideal (VREF − 1 LSB) after the offset error

has been adjusted out.

On Resistance

A measure of the ohmic resistance between the drain and the

source of the switch drivers.

Rev. A | Page 9 of 44

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