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ADS7818E250G4 Datasheet(PDF) 6 Page - Texas Instruments |
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ADS7818E250G4 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 20 page 6 ® ADS7818 TYPICAL PERFORMANCE CURVES (Cont.) At TA = +25°C, VCC = +5V, fSAMPLE = 500kHz, fCLK = 16 • fSAMPLE, and internal +2.5V reference, unless otherwise specified. CHANGE IN SIGNAL-TO-NOISE RATIO and SIGNAL-TO-(NOISE+DISTORTION) vs TEMPERATURE –20 –40 100 Temperature ( °C) 0.2 0.1 0.0 –0.1 –0.2 –0.3 0.3 0 20 40 60 80 SINAD SNR f IN = 100kHz, –0.2dB CHANGE IN SPURIOUS FREE DYNAMIC RANGE AND TOTAL HARMONIC DISTORTION vs TEMPERATURE –20 –40 100 Temperature ( °C) 0.5 0.0 –0.5 –1.0 –1.5 –2.0 1.0 –0.5 0.0 0.5 1.0 1.5 2.0 –1.0 0 20 40 60 80 THDh SFDR h First nine harmonics f IN = 100kHz, –0.2dB of the input frequency 0 FREQUENCY SPECTRUM (4096 Point FFT; f IN = 247kHz, –0.2dB) –100 –80 –60 –40 –20 0 250 62.5 187.5 125 Frequency (kHz) –120 SPURIOUS FREE DYNAMIC RANGE AND TOTAL HARMONIC DISTORTION vs INPUT FREQUENCY 10k 100k 1k 1M Input Frequency (Hz) 85 80 75 70 65 90 –85 –80 –75 –70 –65 –90 THDh h First nine harmonics of the input frequency SFDR SIGNAL-TO-NOISE RATIO and SIGNAL-TO-(NOISE+DISTORTION) vs INPUT FREQUENCY 10k 100k 1k 1M Input Frequency (Hz) 74 72 70 68 66 64 76 SINAD SNR |
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