LTC1283CN(RevB) Ver la hoja de datos (PDF) - Linear Technology
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LTC1283CN Datasheet PDF : 24 Pages
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LTC1283
APPLICATI S I FOR ATIO
Unipolar/Bipolar (UNI)
The fifth input bit (UNI) determines whether the conver-
sion will be unipolar or bipolar. When UNI is a logical one,
a unipolar conversion will be performed on the selected
input voltage. When UNI is a logical zero, a bipolar conver-
sion will result. The input span and code assignment for
each conversion type are shown in the figures below.
Unipolar Transfer Curve (UNI = 1)
1111111111
1111111110
•
•
•
0000000001
0000000000
0V
1LSB
VIN
VREF – 2LSB
VREF
VREF – 1LSB
LTC1283 AI04
Unipolar Output Code (UNI = 1)
OUTPUT CODE
1111111111
1111111110
•
•
•
0000000001
0000000000
INPUT VOLTAGE
VREF – 1LSB
VREF – 2LSB
•
•
•
1LSB
0V
INPUT VOLTAGE
(VREF = 2.5V)
2.4976V
2.4951V
•
•
•
0.0024V
0V
LTC1283 AI06
Bipolar Transfer Curve (UNI = 0)
–VREF + 1LSB
–VREF
10
0111111111
0111111110
0000000001
0000000000
1LSB
–1LSB
–2LSB
1111111111
1111111110
1000000001
1000000000
VIN
VREF – 2LSB
VREF
VREF – 1LSB
LTC1283 AI05
Bipolar Output Code (UNI = 0)
OUTPUT CODE
0111111111
0111111110
•
•
•
0000000001
0000000000
1111111111
1111111110
•
•
•
1000000001
1000000000
INPUT VOLTAGE
VREF – 1LSB
VREF – 2LSB
•
•
•
1LSB
0V
–1LSB
–2LSB
•
•
•
–(VREF) + 1LSB
– (VREF)
INPUT VOLTAGE
(VREF = 2.5V)
2.4951V
2.4902V
•
•
•
0.0049V
0V
– 0.0049V
– 0.0098V
•
•
•
–2.4951V
–2.5000V
LTC1283 AI07
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