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AD645C Datasheet(PDF) 4 Page - Analog Devices |
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AD645C Datasheet(HTML) 4 Page - Analog Devices |
4 / 8 page REV. B –4– AD645–Typical Characteristics (@ +25 C, 15 V unless otherwise noted) 100 1k 10k 100k 1.0 10 100 FREQUENCY – Hz 10 1M 0.1 1 Figure 7. Current Noise Spectral Density vs. Frequency 1.0 10 100 SOURCE RESISTANCE – Ω 1k 10 9 10 8 107 10 6 10 5 103 10 4 NOISE BANDWIDTH: 0.1 to 10Hz Figure 10. Input Voltage Noise vs. Source Resistance 0 1 23 45 WARM-UP TIME – Minutes 50 25 0 25 – 50 – T = +25 C A V = ±15V S Figure 13. Change in Input Offset Voltage vs. Warmup Time 1k 100 10 0 1 10 100 1k 10k 100k FREQUENCY – Hz Figure 8. Voltage Noise Spectral Density vs. Frequency 10 15 20 25 5 100 10 0.1 0.01 CURRENT NOISE VOLTAGE NOISE TEMPERATURE – C 60 – 0 40 – 20 – 20 40 60 80 100 120 140 f = 1kHz o 1 Figure 11. Voltage and Current Noise Spectral Density vs. Temperature 01 2 3 4 5 TIME FROM THERMAL SHOCK – Minutes 150 75 0 150 – 75 – T A = 25°C TO TA = 85°C Figure 14. Change in Input Offset Voltage vs. Time from Thermal Shock 10 100 1k 10k 10 100 1000 FREQUENCY – Hz 1.0 100k 1 0.1 R = 10M Ω S R = 1M Ω S R = 100k Ω S R = 100 Ω S Figure 9. Voltage Noise Spectral Density vs. Frequency for Various Source Resistances 100 1k 10k 100k 1.0 10 100 SOURCE RESISTANCE – Ω 1M 10M 100M 1k SOURCE RESISTANCE NOISE OF AD645 AND RESISTOR RESISTOR NOISE ONLY Figure 12. Voltage Noise Spectral Density @ 1 kHz vs. Source Resistance 60 40 20 0 20 40 60 80 100 120 140 –– – TEMPERATURE – C 10 9 – 10 10 – 10 11 – 10 12 – 10 13 – 10 14 – 10 9 – 10 10 – 10 11 – 10 12 – 10 13 – 10 14 – INPUT BIAS CURRENT INPUT OFFSET CURRENT Figure 15. Input Bias and Offset Currents vs. Temperature |
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