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AD7939BCPZ-REEL7 Datenblatt(PDF) 11 Page - Analog Devices |
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AD7939BCPZ-REEL7 Datenblatt(HTML) 11 Page - Analog Devices |
11 / 36 page Data Sheet AD7938/AD7939 Rev. C | Page 11 of 36 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. SUPPLY RIPPLE FREQUENCY (kHz) –60 –70 –80 –90 –110 –100 –120 10 210 610 410 810 1010 100mV p-p SINE WAVE ON VDD AND/OR VDRIVE NO DECOUPLING DIFFERENTIAL/SINGLE-ENDED MODE INT REF EXT REF Figure 4. PSRR vs. Supply Ripple Frequency Without Supply Decoupling NOISE FREQUENCY (kHz) –70 –75 –90 –85 –80 –95 0 100 400 200 300 600 500 800 700 INTERNAL/EXTERNAL REFERENCE VDD =5V Figure 5. AD7938 Channel-to-Channel Isolation FREQUENCY (kHz) 80 70 60 50 40 30 20 0 100 400 200 300 600 500 1000 700 800 900 FSAMPLE =1.5MSPS RANGE = 0 TO VREF DIFFERENTIAL MODE VDD =5V VDD =3V Figure 6. AD7938 SINAD vs. Analog Input Frequency for Various Supply Voltages FREQUENCY (kHz) 0 –10 –20 –50 –40 –30 –90 –100 –80 –70 –60 –110 4096 POINT FFT VDD =5V FSAMPLE =1.5MSPS FIN = 49.62kHz SINAD = 70.94dB THD = –90.09dB DIFFERENTIAL MODE Figure 7. AD7938 FFT @ VDD = 5 V CODE 1.0 0.8 0.6 0.4 0.2 –0.2 0 –0.8 –0.6 –0.4 –1.0 0 500 2000 1000 1500 3000 2500 4000 3500 VDD =5V DIFFERENTIAL MODE Figure 8. AD7938 Typical DNL @ VDD = 5 V CODE 1.0 0.8 0.6 0.4 0.2 –0.2 0 –0.8 –0.6 –0.4 –1.0 0 500 2000 1000 1500 3000 2500 4000 3500 VDD =5V DIFFERENTIAL MODE Figure 9. AD7938 Typical INL @ VDD = 5 V |
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