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LTC1290BIN Datasheet(PDF) 11 Page - Linear Technology |
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LTC1290BIN Datasheet(HTML) 11 Page - Linear Technology |
11 / 28 page 11 LTC1290 S APPLICATI 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 Unipolar Transfer Curve (UNI = 1) 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 Output Code (UNI = 1) Bipolar Transfer Curve (UNI = 0) Bipolar Output Code (UNI = 0) 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 • • • LTC1290 AI04b 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 0V INPUT VOLTAGE (VREF = 5V) 4.9988V 4.9976V • • • 0.0012V 0V LTC1290 • AI04a 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 • • • 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 INPUT VOLTAGE –1LSB –2LSB • • • –(VREF) + 1LSB – (VREF) INPUT VOLTAGE (VREF = 5V) –0.0024V –0.0048V • • • –4.9976V –5.0000V OUTPUT CODE 0 1 1 1 1 1 1 1 1 1 1 1 0 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 0V INPUT VOLTAGE (VREF = 5V) 4.9976V 4.9851V • • • 0.0024V 0V LTC1290 AI05a VIN 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 • • • 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 • • • LTC1290 AI05b |
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