LPC2109 datasheet(29/46 Pages) NXP

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LPC2109_2119_2129

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Product data sheet

Rev. 7 — 14 June 2011

29 of 46

NXP Semiconductors

LPC2109/2119/2129

Single-chip 16/32-bit microcontrollers

[1]

Conditions: VSSA =0V, VDDA =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 4.

[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 4.

[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 4.

[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 4.

[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 4.

Table 7.

ADC static characteristics

VDDA = 2.5 V to 3.6 V unless otherwise specified; 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

Cia

analog input

capacitance

differential linearity

error

[1][2][3] --

1LSB

EL(adj)

integral non-linearity

[1][4] --

2LSB

offset error

[1][5] --

3LSB

gain error

[1][6] --

0.5

absolute error

[1][7] --

4LSB

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