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AD7607 数据表(PDF) 18 Page - Analog Devices |
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AD7607 数据表(HTML) 18 Page - Analog Devices |
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18 / 36 page ![]() AD7609 Data Sheet Rev. A | Page 18 of 36 80 85 90 95 100 105 110 NO OS OS × 2 OS × 4 OS × 8 OS × 16 OS × 32 OS × 64 OVERSAMPLING RATIO AVCC = VDRIVE = 5V TA = 25°C INTERNAL REFERENCE fSAMPLE SCALES WITH OS RATIO ±10V RANGE ±5V RANGE Figure 26. Dynamic Range vs. Oversampling Ratio 2.5010 2.5005 2.5000 2.4995 2.4990 2.4985 –40 –25 –10 5 20 35 50 65 80 2.4980 TEMPERATURE (°C) AVCC = 4.75V AVCC = 5V AVCC = 5.25V Figure 27. Reference Output Voltage vs. Temperature for Different Supply Voltages –15 –10 –5 0 5 10 –20 –15 –10 –5 0 5 10 15 20 DIFFERENTIAL ANALOG INPUT VOLTAGE (Vx+ – (Vx–)) (V) +25°C V+ +25°C V– +85°C V– +85°C V+ –40°C V– –40°C V+ AVCC, VDRIVE = 5V fSAMPLE = 200kSPS Figure 28. Analog Input Current vs. Input Voltage Over Temperature 22 20 18 16 14 12 10 8 OVERSAMPLING RATIO AVCC, VDRIVE = 5V TA = 25°C INTERNAL REFERENCE fSAMPLE VARIES WITH OS RATE NO OS OS × 2 OS × 4 OS × 8 OS × 16 OS × 32 OS × 64 Figure 29. Supply Current vs. Oversampling Rate 140 0 1100 1000 900 800 700 600 500 400 300 200 100 60 70 80 90 100 110 120 130 AVCC NOISE FREQUENCY (kHz) AVCC, VDRIVE = 5V INTERNAL REFERENCE AD7609 RECOMMENDED DECOUPLING USED fSAMPLE = 200kSPS TA = 25°C ±10V RANGE ±5V RANGE Figure 30. PSRR –100 –90 –80 –70 –60 –50 –40 –30 –20 0 –10 10 100 1k 10k 100k FREQUENCY (Hz) ±10V RANGE ±5V RANGE AVCC, VDRIVE = 5V TA = 25°C fSAMPLE = 200kSPS INTERNAL REFERENCE Figure 31. CMRR vs. Common-Mode Ripple Frequency |
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