Data Sheet

ADAQ8088

Rev. 0 | Page 7 of 14

–180

–216

–252

–288

–324

–360

–144

–72

0

–108

–36

0.1

100

10

1

FREQUENCY (MHz)

Figure 9. Phase Response with Gain Set to 30 dB, Input = −20 dBm

1

–10

–6

–4

–8

–9

–7

–5

–3

–2

0

–1

0.1

100

10

1

FREQUENCY (MHz)

CHANNEL Q

CHANNEL I

Figure 10. Normalized Frequency Response, Input = −20 dBm

2

–10

–8

–6

–4

0

–2

0.1

100

10

1

FREQUENCY (MHz)

3.3V

3.0V

2.7V

Figure 11. Frequency Response vs. Supply, Input = −20 dBm

40

–100

–80

–60

–40

–20

20

0

0.1

1000

100

10

1

FREQUENCY (MHz)

CHANNEL Q

CHANNEL Q TO I

CHANNEL I

CHANNEL I TO Q

Figure 12. I/Q Channel Crosstalk

0.05

–0.05

–0.03

–0.01

0.01

0.03

1.8

–1.6

–1.4

–0.4

–1.0

–1.2

0

–0.8

0.4

0.8

1.6

1.2

–0.6

–0.2

0.2

0.6

1.4

1.0

–10

60

50

40

30

20

10

0

TIME (ns)

OUTPUT

INPUT

INPUT = 80mV p-p

Figure 13. Step Response with Gain Set to 30 dB

0

–120

–60

–80

–100

–40

–20

060

50

40

30

20

10

FREQUENCY (MHz)

–0.3dBFS

–91dBc

FUND

2ND 3RD

–81dBc

ADAQ8088 DRIVING AD9681

FFT OF Q CHANNEL

Q INPUT 6MHz, 63mV p-p

NO I INPUT

Figure 14. Distortion