LPC1786 datasheet(95/120 Pages) NXP

95 / 120 page

LPC178X_7X

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Preliminary data sheet

Rev. 4 — 1 May 2012

95 of 120

NXP Semiconductors

LPC178x/7x

32-bit ARM Cortex-M3 microcontroller

[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 28.

[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 28.

[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 28.

[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 28.

[7]

The absolute 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 28.

[8]

See Figure 29.

[9]

8-bit resolution is achieved by ignoring the lower four bits of the ADC conversion result.

fc(ADC)

ADC conversion

frequency

--1.16

MHz

Cia

analog input

capacitance

--5

Rvsi

voltage source

interface resistance

[8] --1



Table 29.

12-bit ADC characteristics …continued

VDDA = 2.7 V to 3.6 V; Tamb = 40 C to +85 C unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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