AD7276ARMZ datasheet(13/28 Pages) AD

13 / 28 page

AD7276/AD7277/AD7278

Rev. C | Page 13 of 28

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, unless otherwise noted.

FREQUENCY (kHz)

100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400

–120

–20

–100

–80

–60

–40

1500

16,384 POINT FFT

FSAMPLE =3MSPS

FIN =1MHz

SINAD = 71.2dB

THD = –80.9dB

SFDR = –82.4dB

VDD =3V

Figure 10. AD7276 Dynamic Performance at 3 MSPS, Input Tone = 1 MHz

FREQUENCY (kHz)

100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400

–110

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

1500

16,384 POINT FFT

FSAMPLE = 3MSPS

FIN =1MHz

SINAD = 61.6dB

THD = –80.2dB

SFDR = –83.4dB

VDD =3V

Figure 11. AD7277 Dynamic Performance at 3 MSPS, Input Tone = 1 MHz

INPUT FREQUENCY (kHz)

100

67.5

72.5

1500

1000

72.0

71.5

71.0

70.5

70.0

69.5

69.0

68.5

68.0

VDD = 2.35V

VDD =3V

VDD =3.6V

Figure 12. AD7276 SINAD vs. Analog Input Frequency at 3 MSPS

for Various Supply Voltages, SCLK Frequency = 48 MHz

INPUT FREQUENCY (kHz)

100

69.0

73.0

1500

1000

VDD = 2.35V

72.5

72.0

71.5

71.0

70.5

70.0

69.5

VDD =3.6V

VDD =3V

Figure 13. AD7276 SNR vs. Analog Input Frequency at 3 MSPS

for Various Supply Voltages, SCLK Frequency = 48 MHz

CODE

2046

30,000

25,000

20,000

15,000

10,000

5,000

2050

2049

2048

2047

30,000

CODES

Figure 14. Histogram of Codes for 30,000 Samples

INPUT FREQUENCY (kHz)

100

–90

–72

1500

1000

–74

–76

–78

–80

–82

–84

–86

–88

VDD =3.6V

VDD = 2.35V

VDD =3V

Figure 15. THD vs. Analog Input Frequency at 3 MSPS

for Various Supply Voltages, SCLK Frequency = 48 MHz

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