LTC1293BCSW datasheet(11/28 Pages) LINER

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LTC1293/LTC1294/LTC1296

129346fs

APPLICATI

I FOR ATIO

MUX ADDRESS

SGL/

DIFF

DIFFERENTIAL CHANNEL SELECTION

–

Table 1a. LTC1294/6 Multiplexer Channel Selection

MUX ADDRESS

SINGLE-ENDED CHANNEL SELECTION

COM

–

Table 1b. LTC1293 Channel Selection

MUX ADDRESS

Not Used

Unipolar/Bipolar (UNI)

The UNI bit determines whether the conversion will be

unipolar or bipolar. When UNI is a logical one, a unipolar

conversion will be performed on the selected input volt-

age. When UNI is a logical zero, a bipolar conversion will

result. The input span and code assignment for each

conversion type are shown in the figures below:

Unipolar Output Code (UNI = 1)

ODD

SIGN

SELECT

SGL/

DIFF

SELECT

ODD

SIGN

–

DIFFERENTIAL CHANNEL SELECTION

SINGLE-ENDED CHANNEL SELECTION

MUX ADDRESS

SGL/

DIFF

ODD

SIGN

SELECT

SGL/

DIFF

ODD

SIGN

SELECT

COM

–

VIN

0 0 0 0 0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1 1 0

•

LTC1293 AI03b

OUTPUT CODE

1 1 1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1 1 0

•

0 0 0 0 0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0 0 0 0 0

INPUT VOLTAGE

VREF – 1LSB

VREF – 2LSB

•

1LSB

INPUT VOLTAGE

(VREF = 5V)

4.9988V

4.9976V

•

0.0012V

LTC1293 AI03a

Unipolar Transfer Curve (UNI = 1)

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