Philips Semiconductors

LPC2210

16/32-bit ARM microcontrollers with external memory interface

Preliminary data

Rev. 01 — 09 February 2004

30 of 39

9397 750 12872

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

[6]

The gain error (Ge) is the relative difference in percent between the straight line fitting the actual transfer curve after removing offset

error, and the straight line which fits the ideal transfer curve. See Figure 4.

[7]

The absolute voltage error (Ae) is the maximum difference between the center of the steps of the actual transfer curve of the

non-calibrated A/D and the ideal transfer curve. See Figure 4.

(1) Example of an actual transfer curve.

(2) The ideal transfer curve.

(5) Center of a step of the actual transfer curve.

Fig 4.

A/D conversion characteristics.

002aaa668

1023

1022

1021

1020

1019

(2)

(1)

1024

1018

1019

1020

1021

1022

1023

7

123456

7

6

5

4

3

2

1

0

1018

(5)

(4)

(3)

1 LSB

(ideal)

Code

out

V3A - VSSA

1024

offset

error

OSe

gain

error

Ge

offset

error

OSe

AVIN (LSBideal)

1 LSB =