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AD7656A Datasheet(PDF) 11 Page - Analog Devices |
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AD7656A Datasheet(HTML) 11 Page - Analog Devices |
11 / 28 page Data Sheet AD7656A –60 –120 10 100 ANALOG INPUT FREQUENCY (kHz) –70 –80 –90 –100 –110 VDD/VSS = ±16.5V AVCC/DVCC/VDRIVE = +5.25V TA = 25°C INTERNAL REFERENCE ±4 × VREF RANGE RSOURCE = 1000Ω RSOURCE = 10Ω RSOURCE = 100Ω RSOURCE = 50Ω RSOURCE = 220Ω Figure 10. THD vs. Analog Input Frequency for Various Source Impedances, ±4 × VREF Range –40 –120 10 100 ANALOG INPUT FREQUENCY (kHz) –50 –60 –70 –80 –90 –100 –110 VDD/VSS = ±12V AVCC/DVCC/VDRIVE = +5V TA = 25°C INTERNAL REFERENCE ±2 × VREF RANGE RSOURCE = 1000Ω RSOURCE = 100Ω RSOURCE = 50Ω RSOURCE = 220Ω RSOURCE = 10Ω Figure 11. THD vs. Analog Input Frequency for Various Source Impedances, ±2 × VREF Range –55 125 TEMPERATURE (°C) –35 –15 5 25 45 65 85 105 2.492 2.494 2.496 2.498 2.500 2.502 2.504 2.506 2.508 2.510 AVCC/DVCC/VDRIVE = +5V VDD/VSS = ±12V Figure 12. Reference Voltage vs. Temperature 3.20 2.70 –55 125 TEMPERATURE (°C) 3.15 3.10 3.05 3.00 2.95 2.90 2.85 2.80 2.75 –35 –15 5 25 45 65 85 105 AVCC/DVCC/VDRIVE = +5V VDD/VSS = ±12V Figure 13. Conversion Time vs. Temperature 3500 –5 CODE 3 3000 2500 2000 1500 1000 500 –4 –3 –2 –1 0 1 2 VDD/VSS = ±15V AVCC/DVCC/VDRIVE = +5V INTERNAL REFERENCE 8192 SAMPLES 25 168 1532 3212 2806 392 57 0 0 0 Figure 14. Histogram of Codes 100 40 30 530 SUPPLY RIPPLE FREQUENCY (kHz) 90 80 70 60 50 80 130 180 230 280 330 380 430 480 VDD VSS fSAMPLE = 250kSPS ±2 × VREF RANGE INTERNAL REFERENCE TA = 25°C fIN = 10kHz 100nF ON VDD AND VSS Figure 15. PSRR vs. Supply Ripple Frequency Rev. 0 | Page 11 of 28 |
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