AD7902 datasheet(10/29 Pages) AD

10 / 29 page

Data Sheet

AD7902

Rev. B | Page 9 of 28

Figure 11. Histogram of a DC Input at the Code Center, VREF = 5 V

Figure 12. Histogram of a DC Input at the Code Transition, VREF = 5 V

Figure 13. SNR, SINAD, and ENOB vs. Reference Voltage

Figure 14. Histogram of a DC Input at the Code Center, VREF = 2.5 V

Figure 15. SNR vs. Input Level

Figure 16. THD and SFDR vs. Reference Voltage

50000

45000

40000

35000

30000

25000

20000

15000

10000

5000

CODES IN HEX

FA6C FA6D FA6E FA6F FA70 FA71 FA72 FA73 FA74 FA75 FA76

210

12406

41352

11317

249

50000

45000

40000

35000

30000

25000

20000

15000

10000

5000

CODES IN HEX

F87C F87D F87E F87F F880 F881 F882 F883 F884 F885

3393

31890

28056

2177

100

16.0

12.0

12.5

13.0

13.5

14.0

14.5

15.0

15.5

2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25

REFERENCE VOLTAGE (V)

SNR

SINAD

ENOB

50000

45000

40000

35000

30000

25000

20000

15000

10000

5000

CODES IN HEX

135

3524

2991

521

46115

12174

FABA FABB FABC FABD FABE FABF FAC0 FAC1 FAC2 FAC3 FAC4 FAC5 FAC6

–10

–9

–8

–7

–6

–5

–4

–3

–2

–1

–0.1

INPUT LEVEL (dB)

–95

–125

–110

–115

–105

–100

–120

2.25

5.25

REFERENCE VOLTAGE (V)

2.75

3.25

3.75

4.25

4.75

THD

SFDR

100

102

104

106

108

110

112

114

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