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AD9779A-EBZ Datasheet(PDF) 20 Page - Analog Devices |
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AD9779A-EBZ Datasheet(HTML) 20 Page - Analog Devices |
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20 / 56 page  AD9776A/AD9778A/AD9779A Rev. B | Page 20 of 56 –150 –170 0 100 fOUT (MHz) –154 –158 –162 –166 20 40 60 80 fDAC = 800MSPS fDAC = 400MSPS fDAC = 200MSPS Figure 30. AD9779A Noise Spectral Density vs. fOUT, fDAC Over Output Frequency with a Single-Tone Input at −6 dBFS –55 –90 –85 –80 –75 –70 –65 –60 0 260 240 220 200 180 160 140 120 100 80 60 40 20 fOUT (MHz) 0dBFS, PLL DISABLED –3dBFS, PLL DISABLED –6dBFS, PLL DISABLED 0dBFS, PLL ENABLED Figure 31. AD9779A ACLR for First Adjacent Band W-CDMA, 4× Interpolation, fDATA = 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF SPAN 50MHz SWEEP 162.2ms (601 pts) VBW 300kHz CENTER 143.88MHz *RES BW 30kHz RMS RESULTS CARRIER POWER –12.49dBm/ 3.84000MHz FREQ OFFSET 5.000MHz 10.00MHz 15.00MHz REF BW 3.840MHz 3.840MHz 3.840MHz dBc –76.75 –80.94 –79.95 dBm –89.23 –93.43 –92.44 LOWER dBc –77.42 –80.47 –78.96 dBm –89.91 –92.96 –91.45 UPPER REF –25.28dBm *AVG log 10dB PAVG 10 W1 S2 *ATTEN 4dB EXT REF Figure 32. AD9779A W-CDMA Signal, 4× Interpolation, fDATA = 122.88 MSPS, fDAC/4 Modulation –55 –90 –85 –80 –75 –70 –65 –60 0 260 240 220 200 180 160 140 120 100 80 60 40 20 fOUT (MHz) –3dBFS, PLL DISABLED –6dBFS, PLL DISABLED 0dBFS, PLL ENABLED 0dBFS, PLL DISABLED Figure 33. AD9779A ACLR for Second Adjacent Band W-CDMA, 4× Interpolation, fDATA = 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF –55 –90 –85 –80 –75 –70 –65 –60 0 260 240 220 200 180 160 140 120 100 80 60 40 20 fOUT (MHz) –3dBFS, PLL DISABLED –6dBFS, PLL DISABLED 0dBFS, PLL ENABLED 0dBFS, PLL DISABLED Figure 34. AD9779A ACLR for Third Adjacent Band W-CDMA, 4× Interpolation, fDATA = 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF SPAN 50MHz SWEEP 162.2ms (601 pts) VBW 300kHz CENTER 151.38MHz *RES BW 30kHz 1 –17.87dBm 2 –20.65dBm 3 –18.26dBm 4 –18.23dBm TOTAL CARRIER POWER –12.61dBm/15.3600MHz REF CARRIER POWER –17.87dBm/3.84000MHz FREQ OFFSET 5.000MHz 10.00MHz 15.00MHz INTEG BW 3.840MHz 3.840MHz 3.840MHz dBc –67.70 –70.00 –71.65 dBm –85.57 –97.87 –99.52 LOWER dBc –67.70 –69.32 –71.00 dBm –85.57 –87.19 –88.88 UPPER REF –30.28dBm *AVG log 10dB PAVG 10 W1 S2 *ATTEN 4dB EXT REF Figure 35. AD9779A Multicarrier W-CDMA Signal, 4× Interpolation, fDAC = 122.88 MSPS, fDAC/4 Modulation |
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