AD9674KBCZ datasheet(19/48 Pages) AD

19 / 48 page

AD9674

Data Sheet

Rev. A | Page 18 of 47

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100k

10M

100M

FREQUENCY (Hz)

100k

10M

100M

Figure 27. LNA Input Impedance Magnitude and Phase, Unterminated

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CHANNEL GAIN (dB)

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fIN1 = 2.3MHz

fIN2 = 2.31MHz

FUND1 LEVEL = –1dBFS

FUND2 LEVEL = –21dBFS

RS = 50Ω

RIN = 50Ω

RIN = 1000Ω

RIN = 300Ω

Figure 28. IMD3 vs. Channel Gain

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ADC OUTPUT LEVEL (dBFS)

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VGAIN = +1.6V

VGAIN = 0V

VGAIN = –1.2V

fIN1 = 5.0MHz

fIN2 = 5.01MHz

FUND1 LEVEL = –1dBFS

FUND2 LEVEL = –21dBFS

Figure 29. IMD3 vs. ADC Output Level (AOUT)

FREQUENCY (MHz)

Figure 30. Noise Figure vs. Frequency, RS = RIN = 100 Ω, LNA Gain = 17.9 dB,

PGA Gain = 30 dB, VGAIN = 1.6 V

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