AD6684 datasheet(19/107 Pages) AD

19 / 107 page

Data Sheet

AD6684

Rev. 0 | Page 19 of 107

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ANALOG INPUT FREQUENCY (MHz)

BUFFER CURRENT = 160µA

BUFFER CURRENT = 200µA

BUFFER CURRENT = 240µA

BUFFER CURRENT = 280µA

Figure 36. SFDR vs. Analog Input Frequency with Different Buffer Current

Settings (First and Second Nyquist Zones)

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ANALOG INPUT FREQUENCY (MHz)

BUFFER CURRENT = 200µA

BUFFER CURRENT = 240µA

BUFFER CURRENT = 280µA

BUFFER CURRENT = 320µA

Figure 37. SFDR vs. Analog Input Frequency with Different Buffer Current

Settings (Third Nyquist Zone)

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ANALOG INPUT FREQUENCY (MHz)

BUFFER CURRENT = 320µA

BUFFER CURRENT = 360µA

BUFFER CURRENT = 400µA

BUFFER CURRENT = 440µA

Figure 38. SFDR vs. Analog Input Frequency with Different Buffer Current

Settings (Fourth Nyquist Zone)

ANALOG INPUT FREQUENCY (MHz)

INPUT FULL SCALE = 2.16V

INPUT FULL SCALE = 1.44V

Figure 39. SNR vs. Analog Input Frequency with Different Analog Input

Full Scales (First and Second Nyquist Zones)

INPUT FULL SCALE = 2.16V

INPUT FULL SCALE = 1.44V

ANALOG INPUT FREQUENCY (MHz)

64.0

64.2

64.4

64.6

64.8

65.0

65.2

65.4

65.6

65.8

66.0

66.2

66.4

66.6

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67.0

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67.8

68.0

68.2

68.4

68.6

68.8

69.0

Figure 40. SNR vs. Analog Input Frequency with Different Analog Input

Full Scales (Third Nyquist Zone)

INPUT FULL SCALE = 2.16V

INPUT FULL SCALE = 1.44V

ANALOG INPUT FREQUENCY (MHz)

Figure 41. SNR vs. Analog Input Frequency with Different Analog Input

Full Scales (Fourth Nyquist Zone)

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