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AD9680 Datasheet(PDF) 31 Page - Analog Devices |
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AD9680 Datasheet(HTML) 31 Page - Analog Devices |
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31 / 99 page  Data Sheet AD9680 Rev. C | Page 29 of 97 AD9680-500 AVDD1 = 1.25 V, AVDD1_SR = 1.25 V, AVDD2 = 2.5 V, AVDD3 = 3.3 V, DVDD = 1.25 V, DRVDD = 1.25 V, SPIVDD = 1.8 V, 2.06 V p-p full-scale differential input, AIN = −1.0 dBFS, default SPI settings, clock divider = 2, TA = 25°C, 128k FFT sample, unless otherwise noted. See Table 10 for recommended settings. 0 25 50 75 100 125 150 175 200 225 250 FREQUENCY (MHz) AIN = −1dBFS SNR = 68.9dBFS ENOB = 10.9 BITS SFDR = 83dBFS BUFFER CONTROL 1 = 2.0× –140 –120 –100 –80 –60 –40 –20 0 Figure 80. Single-Tone FFT with fIN = 10.3 MHz –140 –120 –100 –80 –60 –40 –20 0 0 25 50 75 100 125 150 175 200 225 250 FREQUENCY (MHz) AIN = −1dBFS SNR = 68.9dBFS ENOB = 11 BITS SFDR = 88dBFS BUFFER CONTROL 1 = 2.0× Figure 81. Single-Tone FFT with fIN = 170.3 MHz 0 25 50 75 100 125 150 175 200 225 250 –140 –120 –100 –80 –60 –40 –20 0 FREQUENCY (MHz) AIN = −1dBFS SNR = 68.5dBFS ENOB = 10.9 BITS SFDR = 83dBFS BUFFER CONTROL 1 = 4.5× Figure 82. Single-Tone FFT with fIN = 340.3 MHz 0 25 50 75 100 125 150 175 200 225 250 –140 –120 –100 –80 –60 –40 –20 0 FREQUENCY (MHz) AIN = −1dBFS SNR = 67.8dBFS ENOB = 10.8 BITS SFDR = 83dBFS BUFFER CONTROL 1 = 4.5× Figure 83. Single-Tone FFT with fIN = 450.3 MHz –140 –120 –100 –80 –60 –40 –20 0 0 25 50 75 100 125 150 175 200 225 250 FREQUENCY (MHz) AIN = −1dBFS SNR = 64.7dBFS ENOB = 10.4 BITS SFDR = 80dBFS BUFFER CONTROL 1 = 5.0× Figure 84. Single-Tone FFT with fIN = 765.3 MHz –140 –120 –100 –80 –60 –40 –20 0 0 25 50 75 100 125 150 175 200 225 250 FREQUENCY (MHz) AIN = −1dBFS SNR = 64.0dBFS ENOB = 10.3 BITS SFDR = 76dBFS BUFFER CONTROL 1 = 5.0× Figure 85. Single-Tone FFT with fIN = 985.3 MHz |
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