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AD9865BCPZ датащи(PDF) 19 Page - Analog Devices |
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AD9865BCPZ датащи(HTML) 19 Page - Analog Devices |
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19 / 49 page ![]() AD9865 Data Sheet Rev. B | Page 18 of 48 IAMP PATH TYPICAL PERFORMANCE CHARACTERISTICS AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, fOSCIN = 50 MSPS, RSET = 1.58 kΩ, 1:1 transformer coupled output (see Figure 64 and Figure 65) into 50 Ω load, half- or full-duplex interface, default power bias settings. FREQUENCY (MHz) 0 5 10 15 20 25 20 –60 –55 –50 –45 –40 –35 –30 –25 –20 –15 –10 –5 0 5 10 15 RBW = 2.3kHz Figure 39. Dual-Tone Spectral Plot of IAMPN Output (IAMP Settings of I = 12.5 mA, N = 4, G = 0, 2:1 Transformer into 75 Ω Loader, VCM = 4.8 V) FREQUENCY (MHz) 0 5 10 15 20 25 0 –80 –70 –60 –50 –40 –30 –20 –10 PAR = 11.4 RMS = 10.3dBm Figure 40. Spectral Plot of 84-Carrier OFDM Test Vector Using IAMPN in Current-Mode Configuration (IAMP Settings of I = 10 mA, N = 4, G = 0; VCM = 4.8 V) FREQUENCY (MHz) 0 5 10 15 20 25 0 –80 –70 –60 –50 –40 –30 –20 –10 PAR = 11.4 RMS = 10.4dBm Figure 41. Spectral Plot of 84-Carrier OFDM Test Vector Using IAMP in Voltage-Mode Configuration with AVDD = 5 V (PBR951 Transistors, IAMP Settings of I = 6 mA, N = 2, G = 6) VCM (V) 3.0 3.5 4.0 4.5 5.0 48 5MHz 10MHz 15MHz 20MHz 2.5MHz 30 46 44 42 40 38 36 34 32 Figure 42. IOUTN Third-Order Intercept vs. Common-Mode Voltage (IAMP Settings of I = 12.5 mA, N = 4, G = 0, 2:1 Transformer into 75 Ω Load) VCM (V) 3.0 3.5 4.0 4.5 5.0 42 5MHz 10MHz 15MHz 20MHz 2.5MHz 30 40 38 36 34 32 Figure 43. IOUTG Third-Order Intercept vs. Common-Mode Voltage (IAMP Settings of I = 4.25 mA, N = 0, G = 6, 2:1 Transformer into 75 Ω Load) FREQUENCY (MHz) 0 5 10 15 20 25 0 –80 –70 –60 –50 –40 –30 –20 –10 PAR = 11.4 RMS = 9.8dBm RBW = 10kHz Figure 44. Spectral Plot of 84-Carrier OFDM Test Vector Using IAMP in Voltage-Mode Configuration with AVDD = 3.3 V (PBR951 Transistors, IAMP Settings of I = 6 mA, N = 2, G = 6) |
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