전자부품 데이터시트 검색엔진 |
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AD5700 데이터시트(PDF) 7 Page - Analog Devices |
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AD5700 데이터시트(HTML) 7 Page - Analog Devices |
7 / 8 page Circuit Note CN-0267 Rev. A | Page 7 of 8 The performance summary can be seen in Table 3, and the signal plots are shown in Figure 8 and Figure 9. Table 3. Primary Sensor Input Noise and Resolution Parameter Pressure Sensor Resistive Network Full Scale 207 kPa 246 kPa Noise RMS 1.3 Pa 0.68 Pa Peak-to-Peak Noise 6.8 Pa 3.6 Pa Resolution Effective (rms) 17.2 bit 18.5 bit Noise-Free Resolution (p-p) 14.9 bit 16.1 bit Figure 8. Pressure Sensor Input Signal Plot Figure 9. Resistive Network as Primary Input Signal Plot Secondary Sensor Input Performance Similar to the primary sensor, the performance of the secondary sensor input is mainly determined by the analog front-end of the ADuCM360 with the exception of noise performance. The analog input was configured to transmit temperature in degrees Celsius (°C) to a master over the HART communication path. Analysis was performed on two tests of 100 samples to quantify the performance. The first test was performed using the platinum 100 Ω sensor on the board, and the second test was performed with the sensor replaced on the board by a standard (fixed) 100 Ω ± 1% resistor. The performance summary is shown in Table 4, and the signal plots are shown in Figure 10 and Figure 11. Table 4. Secondary Sensor Input Noise Performance Parameter Pressure Sensor Resistive Network Noise RMS 0.037°C 0.033°C Noise Peak to Peak 0.19°C 0.16°C Figure 10. RTD (Platinum 100 Ω) Sensor Input Signal Plot Figure 11. Fixed 100 Ω ± 1% Resistor as the Secondary Input Signal Plot 20 25 30 35 40 0 10 20 30 40 50 60 70 80 90 100 SAMPLE –10 –5 0 5 10 0 10 20 30 40 50 60 70 80 90 100 SAMPLE 23.0 23.5 24.0 24.5 25.0 0 10 20 30 40 50 60 70 80 90 100 SAMPLE –1.0 –0.5 0.0 0.5 1.0 0 10 20 30 40 50 60 70 80 90 100 SAMPLE |
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