LPC1850 datasheet(114/142 Pages) NXP

114 / 142 page

LPC1850_30_20_10

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

Preliminary data sheet

Rev. 2.2 — 9 September 2011

114 of 142

NXP Semiconductors

LPC1850/30/20/10

32-bit ARM Cortex-M3 microcontroller

12. ADC/DAC electrical characteristics

[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 42.

[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 42.

[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 42.

[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 42.

[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 42.

[8]

Tamb = 25 C; maximum sampling frequency fs = 4.5 MHz and analog input capacitance Cia = 1 pF.

[9]

Input resistance Ri depends on the sampling frequency fs: Ri = 1 / (fs  Cia).

Table 21.

ADC characteristics

VDDA(3V3) over specified ranges; Tamb = 40 C to +85 C; ADC frequency 4.5 MHz; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIA

analog input voltage

VDDA(3V3)

Cia

analog input capacitance

<tbd>

differential linearity error

[1][2][3] -

<tbd>

LSB

EL(adj)

integral non-linearity

[1][4] -

<tbd>

LSB

offset error

[1][5] -

<tbd>

LSB

gain error

[1][6] -

<tbd>

absolute error

[1][7] -

<tbd>

LSB

Rvsi

voltage source interface

resistance

<tbd>



input resistance

[8][9] -

<tbd>



fclk(ADC)

ADC clock frequency

<tbd>

MHz

fc(ADC)

ADC conversion frequency

<tbd>

kSamples/s

LPC1850 Datasheet(PDF) 114 Page - NXP Semiconductors

LPC1850 Datasheet(HTML) 114 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL