AD9674KBCZ datasheet(17/48 Pages) AD

17 / 48 page

AD9674

Data Sheet

Rev. A | Page 16 of 47

1.4

1.2

1.0

0.8

0.6

0.4

FREQUENCY (MHz)

Figure 15. Short-Circuit, Input Referred Noise vs. Frequency

–132

–146

–5

CHANNEL GAIN (dB)

–144

–142

–140

–138

–136

–134

PGA GAIN = 21dB

Figure 16. Short-Circuit, Output Referred Noise vs. Channel Gain,

PGA Gain = 21 dB, VGAIN = 1.6 V

CHANNEL GAIN (dB)

PGA GAIN = 21dB

PGA GAIN = 27dB

PGA GAIN = 30dB

PGA GAIN = 24dB

LNA GAIN = 21.6dB

Figure 17. SNR vs. Channel Gain and PGA Gain, AOUT = −1.0 dBFS

CHANNEL GAIN (dB)

LNA GAIN = 17.9dB

LNA GAIN = 21.6dB

LNA GAIN = 15.6dB

Figure 18. SNR vs. Channel Gain and LNA Gain,

Output Amplitude (AOUT) = −1.0 dBFS

–5

CHANNEL GAIN (dB)

LNA GAIN = 21.6dB

PGA GAIN = 21dB

PGA GAIN = 30dB

PGA GAIN = 27dB

PGA GAIN = 24dB

Figure 19. SNR vs. Channel Gain and PGA Gain,

Input Amplitude (AIN) = −45 dBm

–10

INPUT FREQUENCY (MHz)

–9

–8

–7

–6

–5

–4

–3

–2

–1

SPEED MODE = I (40MSPS)

LO BAND MODE

Figure 20. AAF Pass-Band Response, LPF Cutoff = 1 × (1/3) × fSAMPLE,

HPF = LPF Cutoff/12

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