LPC2131 datasheet(32/41 Pages) PHILIPS

32 / 41 page

9397 750 14868

Preliminary data sheet

Rev. 02 — 15 April 2005

32 of 41

Philips Semiconductors

LPC2131/2132/2134/2136/2138

Single-chip 16/32-bit microcontrollers

[7]

Only allowed for a short time period.

[8]

Minimum condition for VI = 4.5 V, maximum condition for VI = 5.5 V.

[9]

The input threshold voltage of I2C-bus pins meets the I2C-bus speciﬁcation, so an input voltage below 1.5 V will be recognized as a logic

0 while an input voltage above 3.0 V will be recognized as a logic 1.

[1]

Conditions: VSSA =0V, VDDA = 3.3 V.

[2]

The A/D is monotonic, there are no missing codes.

[3]

The differential non-linearity (ED) is the difference between the actual step width and the ideal step width. See Figure 6.

[4]

The integral no-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 6.

[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 6.

[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 6.

[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 A/D and the ideal transfer curve. See Figure 6.

Table 11:

A/D converter DC electrical characteristics

VDDA = 2.5 V to 3.6 V; Ta = −40 °C to +85 °C unless otherwise speciﬁed. A/D converter frequency 4.5 MHz.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIA

analog input voltage

VDDA

Ciss

analog input

capacitance

-1

differential

non-linearity

[1] [2]

[3]

±1

LSB

EL(adj)

integral non-linearity

[1] [4] -

±2

LSB

offset error

[1] [5] -

±3

LSB

gain error

[1] [6] -

±0.5

absolute error

[1] [7] -

±4

LSB

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