AD775

REV. 0

–5–

–30

–54

0.1

1

10

–36

–42

–48

Figure 5. THD vs. Input Frequency at 20 MSPS Clock Rate

0

–100

10.0

–70

–90

1.0

–80

0

–40

–60

–50

–30

–20

–10

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

FREQUENCY – MHz

Figure 6. Typical FFT at 5 MHz Input, 20 MSPS Clock Rate

+1

–1

+FULLSCALE

–FULLSCALE

0

Figure 7. Typical Integral Nonlinearity (INL)

54

48

0

0.1

1

10

42

36

30

24

18

12

6

Figure 2. S/(N + D) vs. Input Frequency at 20 MSPS Clock

0

–100

10.0

–70

–90

1.0

–80

0

–40

–60

–50

–30

–20

–10

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

FREQUENCY – MHz

Figure 3. Typical FFT at 1 MHz Input, 20 MSPS Clock Rate

+0.4

–0.4

+FULLSCALE

–0.2

–0.3

–FULLSCALE

0

–0.1

+0.1

+0.2

+0.3

Figure 4. Typical Differential Nonlinearity (DNL)