LPC1759 datasheet(53/64 Pages) NXP

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LPC1759_58_56_54_52_51_4

Product data sheet

Rev. 04 — 26 January 2010

53 of 64

NXP Semiconductors

LPC1759/58/56/54/52/51

32-bit ARM Cortex-M3 microcontroller

12. ADC electrical characteristics

[1]

Conditions: VSSA = 0 V, 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 21.

[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 21.

[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 21.

[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 21.

[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 21.

[8]

See Figure 22.

Fig 20. SPI slave timing (CPHA = 0)

SCK (CPOL = 0)

MOSI

MISO

002aad989

TSPICYC

tSPICLKH

tSPICLKL

tSPIDSU

tSPIDH

tSPIQV

DATA VALID

tSPIOH

SCK (CPOL = 1)

DATA VALID

Table 16.

ADC characteristics

VDDA = 2.7 V to 3.6 V; Tamb = −40 °C to +85 °C unless otherwise specified; ADC frequency 13 MHz.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIA

analog input voltage

VDDA

Cia

analog input capacitance

differential linearity error

[1][2][3] -

±1

LSB

EL(adj)

integral non-linearity

[1][4] -

±3

LSB

offset error

[1][5] -

±2

LSB

gain error

[1][6] -

0.5

absolute error

[1][7] -

LSB

Rvsi

voltage source interface

resistance

[8] -

7.5

fclk(ADC)

ADC clock frequency

MHz

fc(ADC)

ADC conversion frequency

200

kHz

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