Inductive Sensor Analysis and Circuit Conditioning Insights
Gain valuable insights on inductive sensor analysis and circuit conditioning for precision applications, including scaling techniques and waveform distortion considerations. Explore recommended circuits and simulation tools for accurate signal chain modeling and optimization.
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Presentation Transcript
Inductive Sensor Analysis Tim Green, MGTS Precision Op Amp Applications Manager April 25, 2018 1
Summary 1) A TI recommended circuit to scale customer inductive sensor into a 5V full scale ADC input is provided. 2) TI recommended circuit shows little waveform distortion after scaling original Vin signal. 3) Any re-scaling of TI recommended circuit must check for op amp input common mode compliance and linear output voltage swing range. 4) Customer can model the application ADC and check complete signal chain by referring to: https://training.ti.com/ti-precision-labs-adcs Note: All TINA-TI simulations can be run on the embedded schematics in this presentation by downloading the free TI SPICE simulator, TINA-TI, at: http://www.ti.com/tool/tina-ti 2
Inductive Sensor Conditioning Circuit 12V VM C1 4.7p D2 1N4148 12V R2 22.9k V5 12 Voa L1 1m R6 1k D1 1N4148 R1 10k - R5 49.9 R7 1k Vin R3 15k Vadc + + U1 OPA1612 R4 47.5k V1 12 C2 1n VP T1 IRF840 VF1 + VG1 4
Transient Analysis 6.00 VF1 0.00 6.00 VG1 0.00 9.81 VM 8.58 9.81 VP 8.58 4.79 Vadc 737.53m 12.91 Vin 11.29 4.79 Voa 737.55m 0.00 20.00m 40.00m Time (s) 5
Transient Analysis Zoom In 5.00 Vadc Vadc 4.55 4.10 Vin Ideal Scale Vin Ideal Scale to Vadc to Vadc 3.65 3.20 Vadc 2.75 2.30 1.85 1.40 950.00m 500.00m 20.60m 20.61m 20.63m Time (s) 6
