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AD7910AKSZ-500RL7 Datasheet(PDF) 10 Page - Analog Devices |
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AD7910AKSZ-500RL7 Datasheet(HTML) 10 Page - Analog Devices |
10 / 24 page AD7910/AD7920 Rev. C | Page 10 of 24 TYPICAL PERFORMANCE CHARACTERISTICS Figure 7 and Figure 8 show a typical FFT plot for the AD7920 and AD7910, respectively, at a 250 kSPS sampling rate and a 100 kHz input frequency. Figure 9 shows the signal-to-(noise + distortion) ratio performance vs. input frequency for various supply voltages while sampling at 250 kSPS with an SCLK frequency of 5 MHz for the AD7920. Figure 10 and Figure 11 show typical INL and DNL performance for the AD7920. Figure 12 shows a graph of the total harmonic distortion vs. analog input frequency for different source impedances when using a supply voltage of 3.6 V and sampling at a rate of 250 kSPS. See the Analog Input section. Figure 13 shows a graph of the total harmonic distortion vs. analog input signal frequency for various supply voltages while sampling at 250 kSPS with an SCLK frequency of 5 MHz. FREQUENCY (kHz) –5 –55 –115 0 125 25 50 75 100 –15 –35 –75 –95 8192 POINT FFT VDD = 2.7V fSAMPLE = 250kSPS fIN = 100kHz SINAD = 72.05dB THD = –82.87dB SFDR = –87.24dB Figure 7. AD7920 Dynamic Performance at 250 kSPS FREQUENCY (kHz) –45 –105 –5 15 –25 –65 –85 0 125 25 50 75 100 8192 POINT FFT VDD = 2.35V fSAMPLE = 250kSPS fIN = 100kHz SINAD = 61.67dB THD = –79.59dB SFDR = –82.93dB Figure 8. AD7910 Dynamic Performance at 250 kSPS FREQUENCY (kHz) –72.0 10 1000 100 –73.0 –73.5 VDD = 5.25V VDD = 2.35V VDD = 2.7V VDD = 4.75V V DD = 3.6V –72.5 –71.0 –71.5 Figure 9. AD7920 SINAD vs. Input Frequency at 250 kSPS CODE 1.0 0.4 –0.2 0 1024 512 0.8 0.6 0.2 0 –0.4 –0.6 –0.8 –1.0 1536 2048 2560 3072 3584 4096 VDD = 2.35V TEMP = 25 °C fSAMPLE = 250kSPS Figure 10. AD7920 INL Performance |
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