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AD7779 Datasheet(PDF) 21 Page - Analog Devices

Part # AD7779
Description  8-Channel, 24-Bit, Simultaneous Sampling ADC
PDF  97 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7779 Datasheet(HTML) 21 Page - Analog Devices

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Data Sheet
AD7779
Rev. 0 | Page 21 of 97
–140
–135
–130
–125
–120
–115
–110
–105
–100
INPUT VOLTAGE (V)
INPUT FREQUENCY = 50Hz
VREF =2.5V
TEMPERATURE = 25°C
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
Figure 32. THD vs. Input Voltage at 2 kSPS, High Resolution Mode
(Input Frequency = 50 Hz)
–125
–120
–115
–110
–105
–100
–95
–90
REFERENCE VOLTAGE (V)
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
INPUT FREQUENCY = 50Hz
TEMPERATURE = 25°C
INPUT VOLTAGE = ±VREF
Figure 33. THD vs. Reference Voltage at 8 kSPS, High Resolution Mode
(Input Frequency = 50 Hz)
–120
-118
–116
–114
–112
–110
–108
–106
–104
–102
–100
MCLK FREQUENCY (Hz)
VREF =2.5V
INPUT VOLTAGE = –0.5dBFS
INPUT FREQUENCY = 50Hz
TEMPERATURE = 25°C
DECIMATION = 256
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
Figure 34. THD vs. MCLK Frequency, High Resolution Mode, Input Frequency
(fIN) = 50 Hz, Decimation = 256
–140
–135
–130
–125
–120
–115
–110
–105
–100
INPUT VOLTAGE (V)
INPUT FREQUENCY = 50Hz
VREF =2.5V
TEMPERATURE = 25°C
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
Figure 35. THD vs. Input Voltage at 500 SPS, Low Power Mode
–125
–120
–115
–110
–105
–100
–95
–90
REFERENCE VOLTAGE (V)
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
INPUT FREQUENCY = 50Hz
TEMPERATURE = 25°C
INPUT VOLTAGE = 5V p-p
Figure 36. THD vs. Reference Voltage at 2 kSPS, Low Power Mode
(Input Frequency = 50 Hz)
–120
–118
–116
–114
–112
–110
–108
–106
–104
–102
–100
FREQUENCY (Hz)
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
DECIMATION = 256
INPUT FREQUENCY = 50Hz
VREF =2.5V
INPUT VOLTAGE = 5V p-p
TEMPERATURE = 25°C
Figure 37. THD vs. MCLK Frequency, Low Power Mode, Input Frequency (fIN) =
50 Hz, Decimation = 256



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