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ADC-207MC Folha de dados(PDF) 5 Page - Murata Power Solutions Inc. |
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ADC-207MC Folha de dados(HTML) 5 Page - Murata Power Solutions Inc. |
5 / 6 page 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (MHz) 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 –5 –10 69.2 27.3 SAMPLE PULSE WIDTH = 25ns 4MHz FUNDAMENTAL Figure 5. Beat Frequency Test at 20MHz Figure 6. 10MHz Envelope Test FFT TEST This test actually produces an amplitude versus frequency graph (Figure 7) which indicates harmonic distortion and signal-to-noise ratio. The theoretical rms signal-to-noise ration for a 7-bit converter is +43.8dB. 0 1 2 3 4 5 6 7 8 9 10 70 65 60 55 50 45 40 35 30 25 20 15 10 0 –5 –10 SAMPLE PULSE = 25ns 69.2 27.3 4MHz FUNDAMENTAL 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 NUMBER OF SAMPLES (X10 ) 3 OUTPUT CODES 120 110 100 90 80 70 60 50 40 30 20 10 0 OUTPUT CODES 120 110 100 90 80 70 60 50 40 30 20 10 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 NUMBER OF SAMPLES(X10 ) 3 Figure 7. FFT Test Using the ADC-207 ADC-207 7-Bit, 20MHz, CMOS Flash A/D Converters MDA_ADC-207.B01 Page 5 of 6 Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com |
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Descrição semelhante - ADC-207MC |
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