M80C196KB datasheet(29/30 Pages) INTEL

29 / 30 page

M80C196KB

AD GLOSSARY OF TERMS

ABSOLUTE ERROR

The maximum difference be-

tween corresponding actual and ideal code tran-

sitions Absolute Error accounts for all deviations of

an actual converter from an ideal converter

ACTUAL CHARACTERISTIC

The characteristic

of an actual converter The characteristic of a given

converter may vary over temperature supply volt-

age and frequency conditions An actual character-

istic rarely has ideal first and last transition locations

or ideal code widths It may even vary over multiple

conversions under the same conditions

BREAK-BEFORE-MAKE

The property of multi-

plexer which guarantees that a previously selected

channel will be deselected before a new channel is

selected (eg the converter will not short inputs to-

gether)

CHANNEL-TO-CHANNEL MATCHING

The differ-

ence between corresponding code transitions of ac-

tual characteristics taken from different channels un-

der the same temperature voltage and frequency

conditions

CHARACTERISTIC

A graph of input voltage ver-

sus the resultant output code for an AD converter

It describes the transfer function of the AD convert-

CODE

The digital value output by the converter

CODE TRANSITION

The point at which the con-

verter changes from an output code of Q to a code

of Q a 1 The input voltage corresponding to a code

transition is defined to be that voltage which is

equally likely to produce either of two adjacent

codes

CODE WIDTH

The voltage corresponding to the

difference between two adjacent code transitions

DC INPUT LEAKAGE

Leakage current to ground

from an analog input pin

DIFFERENTIAL NON-LINEARITY

The difference

between the ideal and actual code widths of the ter-

minal based characteristic

FEEDTHROUGH

Attenuation of a voltage applied

on the selected channel of the AD Converter after

the sample window closes

FULL SCALE ERROR

The difference between the

expected and actual input voltage corresponding to

the full scale code transition

IDEAL CHARACTERISTIC

A characteristic with

its first code transition at VIN e 05 LSB its last

code transition at VIN e (VREF b 15 LSB) and all

code widths equal to one LSB

INPUT RESISTANCE

The effective series resist-

ance from the analog input pin to the sample capaci-

tor

LSBLeast Significant Bit

The voltage corre-

sponding to the full scale voltage divided by 2n

where n is the number of bits of resolution of the

converter For an 8-bit converter with a reference

voltage of 512V one LSB is 20 mV Note that this is

different than digital LSBs since an uncertainty of

two LSB when referring to an AD converter equals

40 mV (This has been confused with an uncertainty

of two digital bits which would mean four counts or

80 mV)

NON-LINEARITY

The maximum deviation of code

transitions of the terminal based characteristic from

the corresponding code transitions of the ideal char-

acteristic

OFF-ISOLATION

Attenuation of a voltage applied

on a deselected channel of the AD converter (Also

referred to as Crosstalk)

REPEATABILITY

The difference between corre-

sponding code transitions from different actual char-

acteristics taken from the same converter on the

same channel at the same temperature voltage and

frequency conditions

RESOLUTION

The number of input voltage levels

that the converter can unambiguously distinguish

between Also defines the number of useful bits of

information which the converter can return

SAMPLE TIME

Begins when the sample capacitor

is attached to a selected channel and ends when

the sample capacitor is disconnected from the se-

lected channel

TEMPERATURE COEFFICIENTS

Change in the

stated variable per degree centigrade temperature

change Temperature coefficients are added to the

typical values of a specification to see the effect of

temperature drift

TERMINAL BASED CHARACTERISTIC

An actual

characteristic which has been rotated and translated

to remove zero offset and full scale error

VCC REJECTION Attenuation of noise on the VCC

line to the AD converter

ZERO OFFSET

The difference between the ex-

pected and actual input voltage corresponding to

the first code transition

M80C196KB 数据表(PDF) 29 Page - Intel Corporation

M80C196KB 数据表(HTML) 29 Page - Intel Corporation

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

数据表下载