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AD9877ABS Datenblatt(PDF) 11 Page - Analog Devices |
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AD9877ABS Datenblatt(HTML) 11 Page - Analog Devices |
11 / 37 page AD9877 Rev. B | Page 10 of 36 TYPICAL PERFORMANCE CHARACTERISTICS VAS = 3.3 V, VDS = 3.3 V, fOSCIN = 27 MHz, fSYSCLK = 216 MHz, fMCLK = 54 MHz (M = 8 and N = 4). ADC sample rate derived directly from fOSCIN, RSET = 4.02 kΩ (IOUT = 10 mA), and 75 Ω DAC load, unless otherwise noted. TYPICAL POWER CONSUMPTION CHARACTERISTICS Transmitted 20 MHz single tone, unless otherwise noted. fSYSCLK (MHz) 120 240 140 160 180 200 220 340 320 300 280 260 240 220 200 180 Figure 3. Power Consumption vs. Clock Speed, fSYSCLK % DUTY CYCLE 0 100 10 30 50 60 70 310 300 290 280 270 260 250 20 40 90 80 Figure 4. Power Consumption vs. Transmit Burst Duty Cycle DUAL SIDEBAND TRANSMIT SPECTRUM See Table 11 for dual-tone generation. FREQUENCY (MHz) 02 2 6 10 12 14 0 –20 –30 –50 –60 –70 –90 48 18 16 –80 –40 –10 0 Figure 5. Dual Sideband Spectral Plot, fC = 5 MHz, f = 1 MHz, RSET = 4.02 KΩ, DAC Gain = 7.5 dB, RBW = 1 kHz FREQUENCY (MHz) 55 75 61 65 67 69 59 63 73 71 0 –20 –30 –50 –60 –70 –90 –80 –40 –10 57 Figure 6. Dual Sideband Spectral Plot, fC = 65 MHz, f = 1 MHz, RSET = 4.02 KΩ, (IOUT = 10 mA), RBW = 1 kHz SINGLE SIDEBAND TRANSMIT SPECTRUM FREQUENCY (MHz) 0 110 30 50 60 70 0 –20 –30 –50 –60 –70 –90 20 40 90 80 –80 –40 –10 10 100 Figure 7. Single Sideband @ 65 MHz, RBW = 2 kHz, fC = 66 MHz, f = 1 MHz, RSET = 4.02 KΩ, DAC gain = 7.5 dB FREQUENCY (MHz) 0 110 30 50 60 70 0 –20 –30 –50 –60 –70 –90 20 40 90 80 –80 –40 –10 10 100 Figure 8. Single Sideband @ 42 MHz, RBW = 2 kHz, fC = 43 MHz, f = 1 MHz, RSET = 4.02 KΩ, DAC gain = 7.5 dB |
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