LPC2220 datasheet(35/50 Pages) NXP

35 / 50 page

LPC2210_2220_6

Product data sheet

Rev. 06 — 11 December 2008

35 of 50

NXP Semiconductors

LPC2210/2220

16/32-bit ARM microcontrollers

[1]

Conditions: VSSA =0V, VDDA(3V3) = 3.3 V.

[2]

The ADC is monotonic, there are no missing codes.

[3]

The differential linearity error (ED) is the difference between the actual step width and the ideal step width. See Figure 5.

[4]

The integral non-linearity (EL(adj)) is the peak difference between the center of the steps of the actual and the ideal transfer curve after

appropriate adjustment of gain and offset errors. See Figure 5.

[5]

The offset error (EO) is the absolute difference between the straight line which ﬁts the actual curve and the straight line which ﬁts the

ideal curve. See Figure 5.

[6]

The gain error (EG) 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 5.

[7]

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

non-calibrated ADC and the ideal transfer curve. See Figure 5.

Table 12.

ADC static characteristics

VDDA(3V3) = 2.5 V to 3.6 V; Tamb = −40 °C to +85 °C unless otherwise speciﬁed. ADC frequency 4.5 MHz.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIA

analog input voltage

VDDA(3V3)

Cia

analog input capacitance

differential linearity error

[1][2][3] --

±1

LSB

EL(adj)

integral non-linearity

[1][4] --

±2

LSB

offset error

[1][5] --

±3

LSB

gain error

[1][6] --

±0.5

absolute error

[1][7] --

±4

LSB

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