AD7694 datasheet(10/24 Pages) AD

10 / 24 page

AD7988-1/AD7988-5

Data Sheet

Rev. B | Page 10 of 24

TYPICAL PERFORMANCE CHARACTERISTICS

VDD = 2.5 V, VREF = 5.0 V, VIO = 3.3 V, unless otherwise noted.

–180

FREQUENCY (kHz)

–20

–40

–60

–80

–100

–120

–140

–160

fS = 500kSPS

fIN = 10kHz

SNR = 91.17dB

THD = –113.63dB

SFDR = 110.30dB

SINAD = 91.15dB

100

150

200

250

Figure 6. AD7988-5 FFT Plot, VREF = 5 V

–180

FREQUENCY (kHz)

–20

–40

–60

–80

–100

–120

–140

–160

fS = 500kSPS

fIN = 10kHz

SNR = 86.8dB

THD = –111.4dB

SFDR = 105.9dB

SINAD = 86.8dB

100

150

200

250

Figure 7. AD7988-5 FFT Plot, VREF = 2.5 V

–180

FREQUENCY (kHz)

–20

–40

–60

–80

–100

–120

–140

–160

fS = 100kSPS

fIN = 10kHz

SNR = 91.09dB

THD = –113.12dB

SFDR = 110.30dB

SINAD = 91.05dB

Figure 8. AD7988-1 FFT Plot, VREF = 5 V

–180

FREQUENCY (kHz)

–20

–40

–60

–80

–100

–120

–140

–160

fS = 100kSPS

fIN = 10kHz

SNR = 86.7dB

THD = –110.4dB

SFDR = 103.9dB

SINAD = 86.6dB

Figure 9. AD7988-1 FFT Plot, VREF = 2.5 V

1.25

–1.25

CODE

1.00

0.75

0.50

0.25

–0.25

–0.75

–0.50

–1.00

POSITIVE INL: +0.40 LSB

NEGATIVE INL: –0.35 LSB

16384

32768

49152

65536

Figure 10. Integral Nonlinearity vs. Code, VREF = 5 V

1.25

1.00

–1.25

–1.00

0.75

0.50

0.25

–0.25

–0.75

–0.50

POSITIVE INL: +0.45 LSB

NEGATIVE INL: –0.29 LSB

CODE

16384

32768

49152

65536

Figure 11. Integral Nonlinearity vs. Code, VREF = 2.5 V

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