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AD7689 Datasheet(PDF) 11 Page - Analog Devices |
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AD7689 Datasheet(HTML) 11 Page - Analog Devices |
11 / 28 page AD7949 Rev. A | Page 11 of 28 90 85 80 75 70 65 60 0 50 100 150 200 FREQUENCY (kHz) VDD = VREF = 5V, –0.5dB VDD = VREF = 5V, –10dB VDD = VREF = 2.5V, –0.5dB VDD = VREF = 2.5V, –10dB Figure 11. SNR vs. Frequency 88 86 84 82 80 78 15.5 15.0 14.5 14.0 13.5 13.0 1.0 REFERENCE VOLTAGE (V) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SNR SINAD ENOB Figure 12. SNR, SINAD, and ENOB vs. Reference Voltage 90 85 80 75 70 65 60 –55 TEMPERATURE (°C) –35 –15 5 25 45 65 85 105 125 fIN = 20kHz VDD = VREF = 5V VDD = VREF = 2.5V Figure 13. SNR vs. Temperature 90 85 80 75 70 65 60 0 50 100 150 200 FREQUENCY (kHz) VDD = VREF = 5V, –0.5dB VDD = VREF = 5V, –10dB VDD = VREF = 2.5V, –0.5dB VDD = VREF = 2.5V, –10dB Figure 14. SINAD vs. Frequency 130 125 120 115 110 105 100 95 90 85 80 75 70 1.0 –60 –65 –70 –75 –80 –85 –90 –95 –100 –105 –110 –115 –120 REFERENCE VOLTAGE (V) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SFDR THD Figure 15. SFDR and THD vs. Reference Voltage –90 –95 –100 –105 –110 –55 TEMPERATURE (°C) –35 –15 5 25 45 65 85 105 125 fIN = 20kHz VDD = VREF = 5V VDD = VREF = 2.5V Figure 16. THD vs. Temperature |
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