T83C51SND1-ROTIL datasheet(51/60 Pages) ATMEL

51 / 60 page

T8xC51SND1

Rev. D – 15-Nov-01

12.24 AC Characteristics - Analog to Digital Converter

12.25.1 Definition of symbols

Table 57. Analog to Digital Converter Timing Symbol Definitions

12.26.2 Characteristics

Table 58. Analog to Digital Converter AC Characteristics

VDD= 2.7 to 3.3 V, TA= 0 to 70

°C

Notes:

1. AV

DD= AVREFP= 3.0 V, AVSS= AVREFN= 0 V. ADC is monotonic with no missing code.

2. The differential non-linearity is the difference between the actual step width and the

ideal step width (see Figure 28).

3. The integral non-linearity is the peak difference between the center of the actual step

and the ideal transfer curve after appropriate adjustment of gain and offset errors

(see Figure 28).

4. The offset error is the absolute difference between the straight line which fits the

actual transfer curve (after removing of gain error), and the straight line which fits the

ideal transfer curve (see Figure 28).

5. The gain error is the relative difference in percent between the straight line which fits

the actual transfer curve (after removing of offset error), and the straight line which

fits the ideal transfer curve (see Figure 28).

12.27.3 Waveforms

Figure 27. Analog to Digital Converter Internal Waveforms

Signals

Conditions

Clock

High

Enable (ADEN bit)

Low

Start Conversion

(ADSST bit)

Symbol

Parameter

Min

Max

Unit

TCLCL

Clock Period

1.43

µs

TEHSH

Start-up Time

µs

TSHSL

Conversion Time

11·TCLCL

µs

DLe

Differential non-

linearity error

1, 2

TBD

LSB

ILe

Integral non-

linearity error1, 3

TBD

LSB

OSe

Offset error1, 4

TBD

LSB

Gain error1, 5

TBD

ADEN Bit

ADSST Bit

EHSH

TSHSL

CLK

CLCL

T83C51SND1-ROTIL Datenblatt(PDF) 51 Page - ATMEL Corporation

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