AD9445 datasheet(21/40 Pages) AD

21 / 40 page

AD9445

Rev. 0 | Page 21 of 40

25000

OUTPUT CODE

N + 4

1127

7968

22190

23754

1355

20000

15000

10000

5000

N – 4

N – 3

N – 2

N – 1

N + 1 N + 2 N + 3

9003

30000

OUTPUT CODE

N + 4

307

3350

15743

26294

3493

227

N – 4

N – 3

N – 2

N – 1

N + 1 N + 2 N + 3

16117

25000

20000

15000

10000

5000

SAMPLE SIZE = 65538

Figure 42. AD9445-125 Grounded Input Histogram

Figure 45. AD9445-105 Grounded Input Histogram

–140

–130

FREQUENCY (MHz)

105MSPS

170.3MHz @ –7.0dBFS

171.3MHz @ –7.0dBFS

SFDR = 92dBFS

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

52.500

13.125

26.250

39.375

–0.8

–40

TEMPERATURE (°C)

–0.1

–0.2

–0.3

–0.4

–0.5

–0.6

–0.7

–20

Figure 43. AD9445-105 64k Point Two-Tone FFT/105 MSPS/170.3 MHz, 171.3 MHz

Figure 46. AD9445-125 Gain vs. Temperature

0.4

–0.4

OUTPUT CODE

16384

0.3

0.2

0.1

–0.1

–0.2

–0.3

4096

8192

12288

–120

–100

FUNDAMENTAL LEVEL (dB)

–20

–40

–60

–80

–100

–10

–30

–50

–70

–90

–110

–90

–80

–70

–60

–50

–40

–30

–20

–10

SFDR dBFS

SFDR dBc

WORST IMD3 dBc

WORST IMD3 dBFS

Figure 44. AD9445-105 Two-Tone SFDR vs. Analog Input Level

105 MSPS/170.3 MHz, 171.3 MHz

Figure 47. AD9445-105 DNL Error vs. Output Code, 105 MSPS, 10.3 MHz

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