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MSC121x用作高精度智能温度传感器
消耗积分:3 |
格式:rar |
大小:232 |
2009-06-27
陈文博
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Contents
1 Temperature Sensing System 2
1.1 Temperature Sensor Circuit . 3
1.2 Temperature Sensor Parameters . 4
1.3 Ideal Diode Equation 5
2 Temperature Sensor Accuracy . 6
2.1 Linear Curve Fitting . 6
2.2 Polynomial Curve Fitting 7
3 Temperature Sensor Calibration Methods 8
3.1 Two Points Calibration 9
3.2 Three Points Calibration 9
3.3 No Calibration and One Point Calibration 10
3.3.1 Average Coefficient Values 10
3.3.2 One Point Calibration 11
3.3.3 Measurement Setups 11
4 Calibration Setups . 11
4.1 Reference Sensor . 11
4.2 Reference Sensor Measurements 12
4.3 Temperature Bath . 12
4.4 Package Junction Temperature 13
5 Self-Heating Effect . 13
6 Example Code. 14
References . 15
Appendix A Sample Part Measurement Data 16
Appendix B Temperature.c Source Listing 17
List of Figures
Figure 1. MSC121x Intelligent Temperature Sensor . 2
Figure 2. Block Diagram of Temperature Sensor 3
Figure 3. MSC Vtemp and Measurement Accuracy 7
Figure 4. Increasing Accuracy with Calibration Complexity . 9
Figure 5. Slope and Intercept Coefficient Histograms for 6 Samples . 10
Figure 6. Temperature Measurement Error for 6 Samples 10
Figure 7. RTD 5 Wires Configuration . 12
Figure 8. Heating Effect from Clock Frequency Change 13
Figure 9. Self-Heating Effect from Power Supply Voltage Change. 13
List of Tables
Table 1. Diode Equation Parameters 4
Table 2. Temperature Sensor Slope and Intercept Coefficients 5
Table 3. Temperature Sensor Calibration Complexities vs. Precision . 8
Table A−1. Sample Part Measurement Data 16
1 Temperature Sensing System 2
1.1 Temperature Sensor Circuit . 3
1.2 Temperature Sensor Parameters . 4
1.3 Ideal Diode Equation 5
2 Temperature Sensor Accuracy . 6
2.1 Linear Curve Fitting . 6
2.2 Polynomial Curve Fitting 7
3 Temperature Sensor Calibration Methods 8
3.1 Two Points Calibration 9
3.2 Three Points Calibration 9
3.3 No Calibration and One Point Calibration 10
3.3.1 Average Coefficient Values 10
3.3.2 One Point Calibration 11
3.3.3 Measurement Setups 11
4 Calibration Setups . 11
4.1 Reference Sensor . 11
4.2 Reference Sensor Measurements 12
4.3 Temperature Bath . 12
4.4 Package Junction Temperature 13
5 Self-Heating Effect . 13
6 Example Code. 14
References . 15
Appendix A Sample Part Measurement Data 16
Appendix B Temperature.c Source Listing 17
List of Figures
Figure 1. MSC121x Intelligent Temperature Sensor . 2
Figure 2. Block Diagram of Temperature Sensor 3
Figure 3. MSC Vtemp and Measurement Accuracy 7
Figure 4. Increasing Accuracy with Calibration Complexity . 9
Figure 5. Slope and Intercept Coefficient Histograms for 6 Samples . 10
Figure 6. Temperature Measurement Error for 6 Samples 10
Figure 7. RTD 5 Wires Configuration . 12
Figure 8. Heating Effect from Clock Frequency Change 13
Figure 9. Self-Heating Effect from Power Supply Voltage Change. 13
List of Tables
Table 1. Diode Equation Parameters 4
Table 2. Temperature Sensor Slope and Intercept Coefficients 5
Table 3. Temperature Sensor Calibration Complexities vs. Precision . 8
Table A−1. Sample Part Measurement Data 16
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