AD7770 datasheet(20/98 Pages) AD

20 / 98 page

Data Sheet

AD7770

Rev. C | Page 19 of 97

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INPUT VOLTAGE (V)

TEMPERATURE = 25°C

GAIN = 1

DIFFERENTIAL INPUT SIGNAL

VCM = (AVDD1x + AVSSx) ÷ 2

VREF = 1V

VREF = 1.5V

VREF = 2V

VREF = 2.5V

VREF = 3V

VREF = 3.3V

Figure 14. INL vs. Input Voltage and Reference Voltage (VREF)

at 16 kSPS, High Resolution Mode

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INPUT VOLTAGE (V)

TEMPERATURE = 25°C

VREF = 2.5V

DIFFERENTIAL INPUT SIGNAL

GAIN = 1

VCM = 1.35V

VCM = 1.65V

VCM = 1.95V

Figure 15. INL vs. Input Voltage and VCM at 16 kSPS, High Resolution Mode

200

400

600

800

1000

1200

1400

ADC CODE

VREF = 2.5V

VCM = (AVDD1x + AVSSx) ÷ 2

TEMPERATURE = 25°C

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

Figure 16. Noise Histogram at 16 kSPS, High Resolution Mode

–20

–15

–10

–5

–4

–3

–2

–1

INPUT VOLTAGE (V)

TEMPERATURE = 25°C

GAIN = 1

DIFFERENTIAL INPUT SIGNAL

VCM = (AVDD1x + AVSSx) ÷ 2

VREF = 1V

VREF = 1.5V

VREF = 2V

VREF = 2.5V

VREF = 3V

VREF = 3.3V

Figure 17. INL vs. Input Voltage and VREF at 4 kSPS, Low Power Mode

–15

–5

–10

INPUT VOLTAGE (V)

TEMPERATURE = 25°C

VREF = 2.5V

DIFFERENTIAL INPUT SIGNAL

GAIN =1

VCM = 1.35V

VCM = 1.65V

VCM = 1.95V

Figure 18. INL vs. Input Voltage and VCM at 4 kSPS, Low Power Mode

200

400

600

800

1000

1200

1400

ADC CODE

VREF = 2.5V

VCM = (AVDD1x + AVSSx) ÷ 2

TEMPERATURE = 25°C

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

Figure 19. Noise Histogram at 4 kSPS, Low Power Mode

AD7770 Datasheet(PDF) 20 Page - Analog Devices

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