AD9675KBCZ datasheet(20/61 Pages) AD

20 / 61 page

Data Sheet

AD9675

Rev. A | Page 19 of 60

Figure 27. LNA Input Impedance Magnitude and Phase, Unterminated

Figure 28. IMD3 vs. Channel Gain

Figure 29. IMD3 vs. ADC Output Level

Figure 30. Noise Figure vs. Frequency

RS = RIN = 100 Ω, LNA Gain = 17.9 dB, PGA Gain = 30 dB, VGAIN = 1.6 V

–10

–20

–30

–40

–50

–60

–70

–80

–90

100k

10M

100M

FREQUENCY (Hz)

100k

10M

100M

–100

CHANNEL GAIN (dB)

–90

–80

–70

–60

–50

–40

–30

–20

–10

fIN1 = 2.3MHz

fIN2 = 2.31MHz

FUND1 LEVEL = –1dBFS

FUND2 LEVEL = –21dBFS

RS = 50Ω

RIN = 50Ω

RIN = 1000Ω

RIN = 300Ω

–120

–40

ADC OUTPUT LEVEL (dBFS)

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

–35

–30

–25

–20

–15

–10

–5

VGAIN = +1.6V

VGAIN = 0V

VGAIN = –1.2V

fIN1 = 5.0MHz

fIN2 = 5.01MHz

FUND1 LEVEL = –1dBFS

FUND2 LEVEL = –21dBFS

020

FREQUENCY (MHz)

2468

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