AD7401 datasheet(9/20 Pages) AD

9 / 20 page

AD7401

Rev. A | Page 9 of 20

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, using 25 kHz brick-wall filter, unless otherwise noted.

100

1000

SUPPLY RIPPLE FREQUENCY (kHz)

100

200

300

400

500

600

700

800

900

MCLKIN = 10MHz

MCLKIN = 5MHz

MCLKIN = 16MHz

200mV p-p SINE WAVE ON VDD1

NO DECOUPLING

VDD1 =VDD2 =5V

1MHz CUTOFF FILTER

Figure 6. PSRR vs. Supply Ripple Frequency Without Supply Decoupling

–90

–50

10k

INPUT FREQUENCY (Hz)

–85

–80

–75

–70

–65

–60

–55

VDD1 =VDD2 =5 V

VDD1 =VDD2 =5V

MCLKIN = 16MHz

MCLKIN = 5MHz

MCLKIN = 10MHz

Figure 7. SINAD vs. Analog Input Frequency

–180

030

FREQUENCY (kHz)

–20

–40

–60

–80

–100

–120

–140

–160

10152025

4096 POINT FFT

fIN = 5kHz

SINAD = 81.984dB

THD = –96.311dB

DECIMATION BY 256

Figure 8. Typical FFT (±200 mV Range)

–90

–50

0.17

0.33

± INPUT AMPLITUDE (V)

–85

–80

–75

–70

–65

–60

–55

0.18 0.19 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30 0.31 0.32

MCLKIN = 16MHz

MCLKIN = 10MHz

VDD1 =VDD2 =5V

Figure 9. SINAD vs. VIN

0.4

–0.5

60k

CODE

0.3

0.2

0.1

–0.1

–0.2

–0.3

–0.4

10k

20k

30k

40k

50k

VIN+ = –200mV TO +200mV

VIN–= 0V

Figure 10. Typical DNL (±200 mV Range)

0.8

–0.4

60k

CODE

VIN+ = –200mV TO +200mV

VIN–= 0V

0.6

0.4

0.2

–0.2

10k

20k

30k

40k

50k

Figure 11. Typical INL (±200 mV Range)

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