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AD7779 Datasheet(PDF) 17 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) 17 Page - Analog Devices

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Data Sheet
AD7779
Rev. 0 | Page 17 of 97
TYPICAL PERFORMANCE CHARACTERISTICS
–8
–6
–4
–2
0
2
4
8
6
INPUT VOLTAGE (V)
GAIN = 1
TEMPERATURE = 25°C
DIFFERENTIAL INPUT SIGNAL
VREF =2.5V
VCM = (AVDD1x + AVSSx) ÷ 2
CH 0
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
Figure 8. INL vs. Input Voltage and Channel at 8 kSPS, High Resolution Mode,
AVSSx (VCM is the Voltage on the VCM Pin)
–6
–4
–2
0
2
4
6
INPUT VOLTAGE (V)
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
TEMPERATURE = 25°C
VREF =2.5V
DIFFERENTIAL VIN ×GAIN
VCM = (AVDD1x + AVSSx) ÷ 2
Figure 9. INL vs. Input Voltage and PGA Gain at 8 kSPS, High Resolution Mode,
AVSSx
–6
–4
–2
0
2
4
6
INPUT VOLTAGE (V)
TA = –40°C
TA = +25°C
TA = +105°C
TA = +125°C
GAIN = 1
DIFFERENTIAL INPUT SIGNAL
VREF = 2.5V
VCM = (AVDD1x + AVSSx) ÷ 2
Figure 10. INL vs. Input Voltage and Temperature at 8 kSPS,
High Resolution Mode, AVSSx
–8
–6
–4
–2
0
2
4
8
6
INPUT VOLTAGE (V)
GAIN = 1
TEMPERATURE = 25°C
DIFFERENTIAL INPUT SIGNAL
VREF =2.5V
VCM = (AVDD1x + AVSSx) ÷ 2
CH 0
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
Figure 11. INL vs. Input Voltage and Channel at 2 kSPS, Low Power Mode,
AVSSx
–8
–6
–4
–2
0
2
4
8
6
INPUT VOLTAGE (V)
DIFFERENTIAL VIN × GAIN
TEMPERATURE = 25°C
VREF =2.5V
VCM = (AVDD1x + AVSSx) ÷ 2
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
Figure 12. INL vs. Input Voltage and PGA Gain at 2 kSPS, Low Power Mode,
AVSSx
–10
–8
–6
–4
–2
0
2
4
10
8
6
INPUT VOLTAGE (V)
GAIN = 1
DIFFERENTIAL INPUT SIGNAL
VREF =2.5V
VCM = (AVDD1x + AVSSx) ÷ 2
TA = –40°C
TA = +25°C
TA = +105°C
TA = +125°C
Figure 13. INL vs. Input Voltage and Temperature at 2 kSPS,
High Resolution Mode, AVSSx



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