AD9670EBZ datasheet(18/48 Pages) AD

18 / 48 page

Data Sheet

AD9674

Rev. A | Page 17 of 47

–100

INPUT FREQUENCY (MHz)

–90

–80

–70

–60

–50

–40

–30

–20

–10

LNA GAIN = 21.6dB

PGA GAIN = 27dB

MIN VGAIN, AOUT = –12.0dBFS

MAX VGAIN, AOUT = –1.0dBFS

THIRD-ORDER, MIN VGAIN

THIRD-ORDER, MAX VGAIN

SECOND-ORDER, MIN VGAIN

SECOND-ORDER, MAX VGAIN

Figure 21. Second-Order and Third-Order Harmonic Distortion vs. Input

Frequency, AOUT = −1.0 dBFS

–100

CHANNEL GAIN (dB)

–90

–80

–70

–60

–50

–40

–30

–20

–10

PGA GAIN = 24dB

LNA GAIN = 17.9dB

LNA GAIN = 15.6dB

LNA GAIN = 21.6dB

Figure 22. Second-Order Harmonic Distortion vs. Channel Gain,

AOUT = −1.0 dBFS

–100

CHANNEL GAIN (dB)

–90

–80

–70

–60

–50

–40

–30

–20

–10

PGA GAIN = 24dB

LNA GAIN = 15.6dB

LNA GAIN = 21.6dB

LNA GAIN = 17.9dB

Figure 23. Third-Order Harmonic Distortion vs. Channel Gain,

AOUT = −1.0 dBFS

–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 = 0V

VGAIN = –1.2V

VGAIN = +1.6V

Figure 24. Second-Order Harmonic Distortion vs. ADC Output Level (AOUT)

–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 = –1.2V

VGAIN = +1.6V

VGAIN = 0V

Figure 25. Third-Order Harmonic Distortion vs. ADC Output Level (AOUT)

–100

–160

–150

–140

–130

–120

–110

100

100k

10k

OFFSET FREQUENCY FROM CARRIER (Hz)

Figure 26. TGC Path Phase Noise, LNA Gain = 21.6 dB, PGA Gain = 27 dB,

VGAIN = 0 V

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