AD9689-2000EBZ datasheet(23/134 Pages) AD

23 / 134 page

Data Sheet

AD9689

Rev. A | Page 23 of 134

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FREQUENCY (MHz)

AIN1 AND AIN2 = –8dBFS

SFDR = 72dBFS

IMD2 = 72dBFS

IMD3 = 78dBFS

BUFFER CURRENT = 500µA

Figure 48. Two-Tone FFT; fIN1 = 1841 MHz, fIN2 = 1846 MHz;

AIN1 and AIN2 = −8 dBFS

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FREQUENCY (MHz)

AIN1 AND AIN2 = –8dBFS

SFDR = 76dBFS

IMD2 = 78dBFS

IMD3 = 76dBFS

BUFFER CURRENT = 700µA

Figure 49. Two-Tone FFT; fIN1 = 2137 MHz, fIN2 = 2142 MHz;

AIN1 and AIN2 = −8 dBFS

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–122.88 –92.16 –61.44 –30.72

30.72 61.44 92.16 122.88

FREQUENCY (MHz)

AIN1 AND AIN2 = –8dBFS

NCO FREQUENCY = 1.84GHz

SFDR = 77dBFS

BUFFER CURRENT = 700µA

Figure 50. Two-Tone FFT; fIN1 = 1846.5 MHz, fIN2 = 2142.5 MHz

fCLK = 2.4576 GHz; Decimation Ratio = 10, NCO Frequency = 1840 MHz

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FREQUENCY (MHz)

AIN1 AND AIN2 = –8dBFS

NCO FREQUENCY = 2.14GHz

SFDR = 84dBFS

BUFFER CURRENT = 700µA

Figure 51. Two-Tone FFT; fIN1 = 1846.5 MHz, fIN2 = 2142.5 MHz

fCLK = 2.4576 GHz; Decimation Ratio = 10, NCO Frequency = 2140 MHz

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INPUT AMPLITUDE (dBFS)

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IMD3 (dBc)

IMD3 (dBFS)

SFDR (dBc)

SFDR (dBFS)

Figure 52. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with

fIN1 = 1841.5 MHz, fIN2 = 1846.5 MHz

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INPUT AMPLITUDE (dBFS)

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IMD3 (dBc)

IMD3 (dBFS)

SFDR (dBc)

SFDR (dBFS)

Figure 53. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with

fIN1 = 2137.5 MHz, fIN2 = 2142.5 MHz

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