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AD7687BRMZ Datasheet(PDF) 10 Page - Analog Devices |
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AD7687BRMZ Datasheet(HTML) 10 Page - Analog Devices |
10 / 28 page AD7687 Data Sheet Rev. B | Page 10 of 28 TYPICAL PERFORMANCE CHARACTERISTICS CODE 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 0 16384 32768 49152 65535 POSITIVE INL = +0.32LSB NEGATIVE INL = –0.41LSB Figure 7. Integral Nonlinearity vs. Code 300000 250000 150000 200000 100000 50000 0 CODE IN HEX 45 46 47 41 42 43 44 0 0 1049 0 0 258680 1391 VDD = REF = 5V Figure 8. Histogram of a DC Input at the Code Center FREQUENCY (kHz) 0 –20 –40 –60 –80 –100 –120 –160 –140 –180 0 20 40 60 80 100 120 8192 POINT FFT VDD = REF = 5V FS = 250KSPS FIN = 2.1kHz SNR = 95.5dB THD = –118.3dB 2nd HARM = –130dB 3rd HARM = –122.7dB Figure 9. FFT Plot CODE 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 0 16384 32768 49152 65535 POSITIVE DNL = +0.27LSB NEGATIVE DNL = –0.24LSB Figure 10. Differential Nonlinearity vs. Code 250000 150000 200000 100000 50000 0 CODE IN HEX 49 4A 4C 44 46 47 48 0 45 060 30721 18 4B 00 200403 29918 VDD = REF = 2.5V Figure 11. Histogram of a DC Input at the Code Center FREQUENCY (kHz) 0 –20 –40 –60 –80 –100 –120 –160 –140 –180 0 20 40 60 80 100 120 32768 POINT FFT VDD = REF = 2.5V FS = 250KSPS FIN = 2kHz SNR = 92.8dB THD = –115.9dB 2nd HARM = –124dB 3rd HARM = –119dB Figure 12. FFT Plot |
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