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INA131BP Datasheet(PDF) 9 Page - Burr-Brown (TI) |
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INA131BP Datasheet(HTML) 9 Page - Burr-Brown (TI) |
9 / 10 page ® INA131 9 INA131 V IN – V IN + OPA602 1M Ω 1M Ω Ref V O Common-mode resistors have approximately 0.1% effect on gain. 100 Ω Shield is driven at the common-mode potential. FIGURE 4. Shield Driver Circuit. INA131 Ref V O 100µA V+ V+ R Z RTD 1 2 3 Equal line resistance here creates a small common-mode voltage which is rejected by INA131. Resistance in this line causes a small common-mode voltage which is rejected by INA131. V O = 0V at RRTD = RZ REF200 FIGURE 5. RTD Temperature Measurement Circuit. FIGURE 6. Thermocouple Amplifier with Cold Junction Compensation. SEEBECK ISA COEFFICIENT R2 R4 TYPE MATERIAL ( µV/°C) (R3 = 100Ω)(R5 + R6 = 100Ω) E Chromel 58.5 3.48k Ω 56.2k Ω Constantan J Iron 50.2 4.12k Ω 64.9k Ω Constantan K Chromel 39.4 5.23k Ω 80.6k Ω Alumel T Copper 38.0 5.49k Ω 84.5k Ω Constantan NOTES: (1) –2.1mV/ °C at 200µA. (2) R 7 provides down-scale burn-out indication. REF102 R 80.6k 4 Ω R 1M 7 Ω R 5.23k 2 Ω R 27k 1 Ω R 100 3 Ω 1N4148 Cu Cu R 50 5 Ω R 100 Zero Adj 6 Ω V+ K 6 10.0V 4 (1) (2) 2 INA131 V O Ref |
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