AD7682 datasheet(9/20 Pages) AD

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Preliminary Technical Data

AD7689

Rev. PrC | Page 9 of 20

TYPICAL PERFORMANCE CHARACTERISTICS

-2

-1.5

-1

-0.5

0.5

1.5

16384

32768

49152

65536

CODE

Figure 5. Integral Nonlinearity vs. Code, VREF = 5V

36872

27695

196433

20000

40000

60000

80000

100000

120000

140000

160000

180000

200000

7FFC

7FFD

7FFE

7FFF

8000

8001

8002

8003

8004

CODE IN HEX

σ = 0.44

VREF = 5V

Figure 6. Histogram of a DC Input at Code Center, VREF = 5V

-180

-160

-140

-120

-100

-80

-60

-40

-20

FREQUENCY (kHz)

fs = 250 kSPS

fIN = 10.1 kHz

SNR = 91.1 dB

THD = -102 dB

SFDR = 103 dB

SINAD = 91 dB

Figure 7. 10kHz FFT, VREF = 5V

-1

-0.75

-0.5

-0.25

0.25

0.5

0.75

16384

32768

49152

65536

CODE

Figure 8. Differential Nonlinearity vs. Code, VREF = 5V

784

50640

171449

37789

457

20000

40000

60000

80000

100000

120000

140000

160000

180000

200000

7FFA

7FFB

7FFC

7FFD

7FFE

7FFF

8000

8001

8002

CODE IN HEX

σ = 0.83

VREF = 2.5V

Figure 9. Histogram of a DC Input at Code Center, VREF = 2.5V

-180

-160

-140

-120

-100

-80

-60

-40

-20

FREQUENCY (kHz)

fs = 250 kSPS

fIN = 10.1 kHz

SNR = 87.1 dB

THD = -104 dB

SFDR = 104 dB

SINAD = 87 dB

Figure 10. 10kHz FFT, VREF = 2.5V

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