AD7626 datasheet(12/28 Pages) AD

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AD7626

Rev. A | Page 12 of 2

92.0

90.0

90.2

90.4

90.6

90.8

91.0

91.2

91.4

91.6

91.8

–40

–20

TEMPERATURE (°C)

EXTERNAL REFERENCE

INTERNAL REFERENCE

Figure 17. SNR vs. Temperature (−0.5 dB, 20 kHz Input Tone)

0.35

–0.10

–0.05

0.05

0.10

0.15

0.20

0.25

0.30

–6

–4

–2

INPUT COMMON-MODE VOLTAGE (V)

+INPUT CURRENT

–INPUT CURRENT

Figure 18. Input Current (IN+, IN−) vs. Differential Input Voltage (10 MSPS)

–103.0

–107.0

–106.5

–106.0

–105.5

–105.0

–104.5

–104.0

–103.5

–40

–20

TEMPERATURE (°C)

EXTERNAL REFERENCE

INTERNAL REFERENCE

Figure 19. THD vs. Temperature (−0.5 dB, 20 kHz Input Tone)

92.0

90.0

90.2

90.4

90.6

90.8

91.0

91.2

91.4

91.6

91.8

–40

–20

TEMPERATURE (°C)

EXTERNAL REFERENCE

INTERNAL REFERENCE

Figure 20. SINAD vs. Temperature (−0.5 dB, 20 kHz Input Tone)

–1

–40

–20

TEMPERATURE (°C)

ZERO ERROR

GAIN ERROR

Figure 21. Zero Error and Gain Error vs. Temperature

CODE (HEX)

30,651

201,320

30,073

50,000

100,000

150,000

200,000

250,000

FEC7

FEC8

FEC9

FECA

FECB

FECC

FECD

262,144 SAMPLES

STD DEVIATION = 0.4829

Figure 22. Histogram of 262,144 Conversions of a DC Input

at the Code Center (Internal Reference)

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