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LTC1531CSW датащи(PDF) 11 Page - Linear Technology |
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LTC1531CSW датащи(HTML) 11 Page - Linear Technology |
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11 / 16 page ![]() 11 LTC1531 Figure 10. Isolated Potentiometer Transducer Sense Figure 9. Isolated Voltage Sense TYPICAL APPLICATIONS VOUT 0V TO VCC FULL-SCALE OUTPUT ISOGND V1 V2 V3 V4 1531 F09 VALID 10k GND R1, 1M ISOLATION BARRIER DELTA-SIGMA TYPE MODULATION: CMPOUT IS ON 108 µs AT ~300Hz RATE THEREFORE: 108 µs • 300Hz = 1/30TH TIME CONSTANT = 1M • 30 • 0.22 µF = 6.6sec 2.5V 2.2 µF C1 0.22 µF LTC1531 + – VPW 0V TO 2.5V FULL-SCALE INPUT VCC VCC VCC VCC SHDN CMPOUT VREG ZCDATA ZCPOS ZCNEG DATA 10k R3 10M QD R2 10M C2, 1 µF + LT1490 1 1 1 = ISOLATED GROUND = EQUIPMENT GROUND 1 RESOLUTION = 4mV SETTLING TIME = 10sec VOUT 0V TO VCC FULL-SCALE OUTPUT ISOGND V1 V2 V3 V4 1531 TA05 VALID 10k GND R1, 1M ISOLATION BARRIER DELTA-SIGMA TYPE MODULATION: CMPOUT IS ON 108 µs AT ~300Hz RATE THEREFORE: 108 µs • 300Hz = 1/30TH TIME CONSTANT = 1M • 30 • 0.22 µF = 6.6sec 2.5V 2.2 µF 100k C1 0.22 µF LTC1531 + – VPW VCC VCC VCC VCC SHDN CMPOUT VREG ZCDATA ZCPOS ZCNEG DATA 10k R3 10M QD R2 10M C2, 1 µF + LT1490 1 1 1 1 = ISOLATED GROUND = EQUIPMENT GROUND 1 RESOLUTION = 4mV SETTLING TIME = 10sec |
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