AD7467BRTZ-R datasheet(14/28 Pages) AD

14 / 28 page

AD7466/AD7467/AD7468

Rev. C | Page 14 of 28

–5

–45

–35

–25

–15

–55

–65

–75

–85

–95

FREQUENCY (kHz)

8192 POINT FFT

VDD = 1.8V

fSAMPLE = 100kSPS

fIN = 30kHz

SINAD = 49.83dB

THD = –79.37dB

SFDR = –70.46dB

Figure 8. AD7468 Dynamic Performance at 100 kSPS

–65

–72

–71

–70

–69

–68

–67

–66

–73

100

INPUT FREQUENCY (kHz)

VDD = 3.6V

VDD = 3V

VDD = 2.7V

TEMP = 25

°C

VDD = 1.8V VDD = 1.6V VDD = 2.2V

Figure 9. AD7466 SINAD vs. Analog Input Frequency

at 100 kSPS for Various Supply Voltages

–68.0

–72.5

–72.0

–71.5

–71.0

–70.5

–70.0

–69.0

–68.5

–69.5

–73.0

100

INPUT FREQUENCY (kHz)

VDD = 3.6V

VDD = 3V

VDD = 2.7V

TEMP = 25

°C

VDD = 1.8V

VDD = 1.6V

VDD = 2.2V

Figure 10. AD7466 SNR vs. Analog Input Frequency

at 100 kSPS for Various Supply Voltages

–65

–83

–81

–79

–77

–75

–73

–69

–67

–71

–85

100

INPUT FREQUENCY (kHz)

VDD = 3.6V

VDD = 3V

VDD = 2.7V

TEMP = 25

°C

VDD = 1.8V

VDD = 1.6V

VDD = 2.2V

Figure 11. AD7466 THD vs. Analog Input Frequency

at 100 kSPS for Various Supply Voltages

–76

–83

–82

–81

–80

–79

–78

–77

–84

100

INPUT FREQUENCY (kHz)

RIN = 510Ω

RIN = 10Ω

TEMP = 25

°C

VDD = 2.7V

RIN = 100Ω

RIN = 0Ω

RIN = 1kΩ

Figure 12. AD7466 THD vs. Analog Input Frequency

for Various Source Impedances

1.0

–0.8

–0.6

–0.4

–0.2

0.2

0.4

0.6

0.8

–1.0

512

1024

1536

2048

2560

3072

3584

4096

CODE

VDD = 1.8V

TEMP = 25

°C

fIN = 50Hz

fSAMPLE = 100kSPS

Figure 13. AD7466 INL Performance

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