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ADC32RF83 数据表(PDF) 39 Page - Texas Instruments |
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ADC32RF83 数据表(HTML) 39 Page - Texas Instruments |
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39 / 138 page ![]() 39 ADC32RF80, ADC32RF83 www.ti.com SBAS774A – MAY 2016 – REVISED DECEMBER 2016 Product Folder Links: ADC32RF80 ADC32RF83 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated 8.3.4.3 Decimation Filters The stop-band rejection of the decimation filters is approximately 90 dB with a pass-band bandwidth of approximately 80%. Table 4 gives an overview of the pass-band bandwidth depending on decimation filter setting and ADC sampling rate. Table 4. Decimation Filter Summary and Maximum Available Output Bandwidth DECIMATION SETTING NO. OF DDCS AVAILABLE PER CHANNEL NOMINAL PASSBAND GAIN BANDWIDTH ADC SAMPLE RATE = N MSPS ADC SAMPLE RATE = 3 GSPS 3 dB (%) 1 dB (%) OUTPUT RATE (MSPS) PER BAND OUTPUT BANDWIDTH (MHz) PER BAND COMPLEX OUTPUT RATE (MSPS) PER BAND OUTPUT BANDWIDTH (MHz) PER BAND Divide-by-4 complex 1 –0.4 dB 90.9 86.8 N / 4 complex 0.4 × N / 2 750 600 Divide-by-6 complex 1 –0.65 dB 90.6 86.1 N / 6 complex 0.4 × N / 3 500 400 Divide-by-8 complex 2 –0.27 dB 91.0 86.8 N / 8 complex 0.4 × N / 4 375 300 Divide-by-9 complex 2 –0.45 dB 90.7 86.3 N / 9 complex 0.4 × N / 4.5 333.3 266.6 Divide-by-10 complex 2 –0.58 dB 90.7 86.3 N / 10 complex 0.4 × N / 5 300 240 Divide-by-12 complex 2 –0.55 dB 90.7 86.4 N / 12 complex 0.4 × N / 6 250 200 Divide-by-16 complex 2 –0.42 dB 90.8 86.4 N / 16 complex 0.4 × N / 8 187.5 150 Divide-by-18 complex 2 –0.83 dB 91.2 87.0 N / 18 complex 0.4 × N / 9 166.6 133 Divide-by-20 complex 2 –0.91 dB 91.2 87.0 N / 20 complex 0.4 × N / 10 150 120 Divide-by-24 complex 2 –0.95 db 91.1 86.9 N / 24 complex 0.4 × N / 12 125 100 Divide-by-32 complex 2 –0.78 dB 91.1 86.8 N / 32 complex 0.4 × N / 16 93.75 75 |
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