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AD7771BCPZ Datasheet(PDF) 28 Page - Analog Devices

Part # AD7771BCPZ
Description  8-Channel, 24-Bit, Simultaneous Sampling ADC
PDF  99 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7771BCPZ Datasheet(HTML) 28 Page - Analog Devices

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Data Sheet
AD7771
Rev. 0 | Page 27 of 98
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
1
2
4
8
PGA GAIN
HIGH RESOLUTION
LOW POWER
TEMPERATURE = 25°C
AVDD1x = 3.3V
VREF = 2.5V
VIN = 0dBFS
Figure 68. Channel Gain Mismatch
0.008
–0.010
–40
125
TEMPERATURE (°C)
–0.008
–0.006
–0.004
–0.002
0
0.002
0.004
0.006
CH 0
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
–30 –20 –10 0 10 20 30 40 50 60 70 80 90 100 110
VREF = 2.5V
VIN = –0.5dBFS
SUPPLY = AVDD1x = 3.3V
Figure 69. Total Unadjusted Error (TUE) (as Percent of Input) vs. Temperature,
High Resolution Mode
3
–5
–3
0
2
–1
–4
–2
1
–2.5
–1.5
–0.5
0.5
1.5
–2.0
–1.0
0
1.0
2.0
2.5
DIFFERENTIAL INPUT VOLTAGE ((AINx+) – (AINx–))
VREF = 2.5V
SUPPLY = AVDD1x = 3.3V
AINx+, VCM = 1.95V
AINx–, VCM = 1.95V
AINx+; VCM = 1.35V
AINx–, VCM = 1.35V
Figure 70. Input Current vs. Differential Input Voltage,
High Resolution Mode
–40
25
105
125
TEMPERATURE (°C)
–6
4
3
2
1
0
–1
–2
–3
–4
–5
Figure 71. Internal Reference Voltage Drift
0.006
–0.008
–0.006
–0.004
–0.002
0
0.002
0.004
–40
125
TEMPERATURE (°C)
CH 0
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
–30 –20 –10 0 10 20 30 40 50 60 70 80 90 100 110
VREF = 2.5V
VIN = –0.5dBFS
SUPPLY = AVDD1x = 3.3V
Figure 72. Total Unadjusted Error (TUE) (as Percent of Input) vs.
Temperature, Low Power Mode
1.0
0.8
–0.8
–0.6
0
0.4
0.6
–0.2
–0.4
0.2
–2.5
–1.5
–0.5
0.5
1.5
–2.0
–1.0
0
1.0
2.0
2.5
DIFFERENTIAL INPUT VOLTAGE ((AINx+) – (AINx–))
VREF = 2.5V
SUPPLY = AVDD1x = 3.3V
AINx+, VCM = 1.95V
AINx–, VCM = 1.95V
AINx+; VCM = 1.35V
AINx–, VCM = 1.35V
Figure 73. Input Current vs. Differential Input Voltage,
Low Power Mode



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