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AD7942BRM-RL7 Datasheet(PDF) 9 Page - Analog Devices |
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AD7942BRM-RL7 Datasheet(HTML) 9 Page - Analog Devices |
9 / 24 page AD7942 Rev. B | Page 9 of 24 TYPICAL PERFORMANCE CHARACTERISTICS POSITIVE INL = +0.22LSB NEGATIVE INL = –0.34LSB 1.00 0.75 0.50 0.25 0 –0.50 –0.75 –1.00 –0.25 0 4096 8192 12,288 16,384 CODE Figure 5. Integral Nonlinearity vs. Code 129,941 150,000 100,000 50,000 0 0 0 915 216 0 0 1FFD 1FFE 1FFF 2000 2001 2002 2003 CODE IN HEX VDD = VREF = 2.5V Figure 6. Histogram of a DC Input at the Code Center 0 –20 –40 –60 –80 –100 –120 –140 –160 –180 0 25 50 75 100 125 FREQUENCY (kHz) 16,384 POINT FFT VDD = VREF = 5V fS = 250kSPS fIN = 20.43kHz SNR = 85.1dB THD = –105dB SFDR = –105.9dB Figure 7. FFT Plot POSITIVE DNL = +0.24LSB NEGATIVE DNL = –0.12LSB 1.00 0.75 0.50 0.25 0 –0.50 –0.75 –1.00 –0.25 0 4096 8192 12,288 16,384 CODE Figure 8. Differential Nonlinearity vs. Code 150,000 100,000 50,000 0 00 0 0 0 0 1FFD 1FFE 1FFF 2000 2001 2002 2003 CODE IN HEX VDD = VREF = 5V 131,072 Figure 9. Histogram of a DC Input at the Code Center 0 –20 –40 –60 –80 –100 –120 –140 –160 –180 0 25 50 75 100 125 FREQUENCY (kHz) 16,384 POINT FFT VDD = VREF = 2.5V fS = 250kSPS fIN = 20.43kHz SNR = 84.2dB THD = –101.7dB SFDR = –104.3dB Figure 10. FFT Plot |
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