AD7771BCPZ datasheet(30/99 Pages) AD

30 / 99 page

Data Sheet

AD7771

Rev. 0 | Page 29 of 98

–140

INPUT FREQUENCY (Hz)

–120

–100

–80

–60

–40

–20

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

VCM = 1.65V + 100mV p-p

SUPPLY = AVDD1x = 3.3V + 100mV p-p

Figure 80. CMRR vs. Input Frequency at 128 kSPS, High Resolution Mode

–160

INPUT FREQUENCY(Hz)

–150

–140

–130

–120

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

TA = 25°C

SUPPLY = AVDD1x = 3.3V+100mVpp

Figure 81. AC PSRR vs. Input Frequency at 128 kSPS, High Resolution

Mode

–120

FREQUENCY (Hz)

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

Figure 82. Filter Profiles at 64 kSPS, High Resolution Mode

–140

INPUT FREQUENCY (Hz)

–120

–100

–80

–60

–40

–20

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

VCM = 1.65V + 100mV p-p

SUPPLY = AVDD1x = 3.3V + 100mV p-p

Figure 83. CMRR vs. Input Frequency at 32 kSPS, Low Power Mode

–160

INPUT FREQUENCY(Hz)

–150

–140

–130

–120

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

TA = 25°C

SUPPLY = AVDD1x = 3.3V + 100mV p-p

Figure 84. AC PSRR vs. Input Frequency at 32 kSPS, Low Power Mode

FREQUENCY (Hz)

–120

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

Figure 85. Filter Profiles at 16 kSPS, Low Power Mode

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