AD7770 datasheet(25/98 Pages) AD

25 / 98 page

AD7770

Data Sheet

Rev. C | Page 24 of 97

–18

–16

–14

–12

–10

–8

–6

–4

–2

POWER SUPPLY SETTING

TEMPERATURE = 25°C

VIN = 0V

VREF = 2.5V

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

3.0

3.6

3.3

Figure 44. Offset Error vs. Power Supply Setting, High Resolution Mode

–50

–10

–20

–30

–40

–20

100

120

TEMPERATURE (°C)

CH 0

CH 1

CH 2

CH 3

CH 4

CH 5

CH 6

CH 7

AVDD1x = 3.3V

Figure 45. Offset Drift vs. Temperature

–0.043

–0.035

–0.026

–0.017

–0.008

0.008

0.017

3.0

3.3

3.6

AVDD1x SUPPLY (V)

CH 0

CH 1

CH 2

CH 3

CH 4

CH 5

CH 6

CH 7

TEMPERATURE = 25°C

GAIN = 1

VREF = 2.5V

VIN = 0dBFS

Figure 46. Gain Error vs. AVDD1x Supply, High Resolution Mode

–16

–14

–12

–10

–8

–6

–4

–2

POWER SUPPLY SETTING

TEMPERATURE = 25°C

VIN = 0V

VREF = 2.5V

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

3.0

3.6

3.3

Figure 47. Offset Error vs. Power Supply Setting, Low Power Mode

–20

–15

–10

–5

500

168

1000

TIME (Hours)

Figure 48. Gain Error Drift vs. Time

3.0

3.3

3.6

AVDD1x SUPPLY (V)

TEMPERATURE = 25°C

GAIN = 1

VREF = 2.5V

VIN = 0dBFS

–0.043

–0.035

–0.026

–0.017

–0.008

0.008

0.017

CH 0

CH 1

CH 2

CH 3

CH 4

CH 5

CH 6

CH 7

Figure 49. Gain Error vs. AVDD1x Supply, Low Power Mode

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