MCB11C14【PDF 25/49 页】BOARD EVAL FOR NXP LPC11C14

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NXP Semiconductors

LPC11C12/C14

[15] Allowed as long as the current limit does not exceed the maximum current allowed by the device.

[16] To V SS .

Table 6. ADC static characteristics

T amb = ? 40 ° C to +85 ° C unless otherwise specified; ADC frequency 4.5 MHz, V DD = 2.5 V to 3.6 V.

Symbol

V IA

C ia

E D

E L(adj)

E O

E G

E T

R vsi

Parameter

analog input voltage

analog input capacitance

differential linearity error

integral non-linearity

offset error

gain error

absolute error

voltage source interface

Conditions

[1][2]

[3]

[4]

[5]

[6]

Min

0

-

-

Typ

-

-

-

-

-

-

-

-

Max

V DD

1

± 1

± 1.5

± 3.5

0.6

± 4

40

Unit

V

pF

LSB

LSB

LSB

%

LSB

k Ω

resistance

R i

input resistance

[7][8]

-

2.5

M Ω

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

The ADC is monotonic, there are no missing codes.

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

The integral non-linearity (E L(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 .

The offset error (E O ) 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 .

The gain error (E G ) 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 .

The absolute error (E T ) 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 .

T amb = 25 ° C; maximum sampling frequency f s = 4.5 MHz and analog input capacitance C ia = 1 pF.

Input resistance R i depends on the sampling frequency fs: R i = 1 / (f s × C ia ).

LPC11C12_C14_0

Preliminary data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 00.05 — 23 April 2010

? NXP B.V. 2010. All rights reserved.

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