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EL5250 Datasheet(PDF) 15 Page - Renesas Technology Corp |
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EL5250 Datasheet(HTML) 15 Page - Renesas Technology Corp |
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15 / 18 page  EL5150, EL5151, EL5250, EL5251, EL5451 FN7384 Rev 7.00 Page 15 of 18 January 16, 2008 Strain Gauge The strain gauge is an ideal application to take advantage of the moderate bandwidth and high accuracy of the EL5150. The operation of the circuit is very straight-forward. As the strain variable component resistor in the balanced bridge is subjected to increasing strain, its resistance changes resulting in an imbalance in the bridge. A voltage variation from the referenced high accuracy source is generated and translated to the difference amplifier through the buffer stage. This voltage difference as a function of the strain is converted into an output voltage. + - 0.1µF 5V V2 22 R17 1k 1k RF 0.1µF 5V V4 RL 1k VOUT (V1+V2+V3+V4) 1 3 2 V+ V- 4 U1A 22 11 R18 1k 1k R15 V5 1k 0V VARIABLE SUBJECT TO STRAIN R15 1k R14 4 4 |
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