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AD7771BCPZ 数据表(PDF) 19 Page - Analog Devices

部件名 AD7771BCPZ
功能描述  8-Channel, 24-Bit, Simultaneous Sampling ADC
PDF  99 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7771BCPZ 数据表(HTML) 19 Page - Analog Devices

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AD7771
Data Sheet
Rev. 0 | Page 18 of 98
20
–20
–10
5
15
0
–15
–5
10
–4
–2
0
2
–3
–1
1
3
4
INPUT VOLTAGE (V)
TA = 25°C
GAIN = 1
DIFFERENTIAL INPUT SIGNAL
VCM = (AVDD1x + AVSSx) ÷ 2
VREF = 1.0V
VREF = 1.5V
VREF = 2.0V
VREF = 2.5V
VREF = 3.0V
VREF = 3.3V
Figure 14. INL vs. Input Voltage and Reference Voltage (VREF)
at 64 kSPS, High Resolution Mode
10
–10
–8
–6
–4
–2
0
2
4
6
8
INPUT VOLTAGE (V)
TA = 25°C
GAIN = 1
DIFFERENTIAL VIN × GAIN
VREF = 2.5V
VCM = 1.95V
VCM = 1.65V
VCM = 1.35V
Figure 15. INL vs. Input Voltage and VCM at 64 kSPS,
High Resolution Mode
ADC CODE
1000
900
800
700
600
500
400
300
200
100
0
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
VREF = 2.5V
VCM = (AVDD1x + AVSSx) ÷ 2
TA = 25°C
Figure 16. Noise Histogram at 16 kSPS, High Resolution Mode,
Sinc3 Filter Enabled
–4
–3
4
INPUT VOLTAGE (V)
15
10
5
0
–5
–10
–15
–2
–1
0
1
2
3
TA = 25°C
GAIN = 1
DIFFERENTIAL INPUT SIGNAL
VCM = (AVDD1x + AVSSx) ÷ 2
VREF = 2.5V
VREF = 1.0V
VREF = 1.5V
VREF = 2.0V
VREF = 2.5V
VREF = 3.0V
VREF = 3.3V
Figure 17. INL vs. Input Voltage and Reference Voltage (VREF)
at 16 kSPS, Low Power Mode
15
10
5
0
–5
–10
–15
INPUT VOLTAGE (V)
TA = 25°C
GAIN = 1
DIFFERENTIAL INPUT SIGNAL
VREF = 2.5V
VCM = 1.95V
VCM = 1.65V
VCM = 1.35V
Figure 18. INL vs. Input Voltage and VCM at 16 kSPS,
Low Power Mode
ADC CODE
1000
900
800
700
600
500
400
300
200
100
0
GAIN = 1
GAIN = 2
GAIN = 4
GAIN = 8
VREF = 2.5V
VCM = (AVDD1x + AVSSx) ÷ 2
TA = 25°C
Figure 19. Noise Histogram at 4 kSPS, Low Power Mode,
Sinc3 Filter Enabled



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