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AD7172-4BCPZ-RL7 bảng dữ liệu(PDF) 5 Page - Analog Devices

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AD7172-4BCPZ-RL7 bảng dữ liệu(HTML) 5 Page - Analog Devices

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AD7172-4
Data Sheet
Rev. B | Page 4 of 61
SPECIFICATIONS
AVDD1 = 3.0 V to 5.5 V, AVDD2 = IOVDD = 2 V to 5.5 V, AVSS = DGND = 0 V, REF+ = 2.5 V, REF− = AVSS, MCLK = internal master
clock = 2 MHz, TA = TMIN to TMAX (−40°C to +105°C), unless otherwise noted.
Table 1.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
ADC SPEED AND PERFORMANCE
Output Data Rate (ODR)
1.25
31,250
SPS
No Missing Codes1
Excluding sinc3 filter ≥ 15 kSPS
24
Bits
Resolution
See Table 6 and Table 7
Noise
See Table 6 and Table 7
ACCURACY
Integral Nonlinearity (INL)
±2
±5.2
ppm of FSR
Offset Error2
Internal short
±75
μV
Offset Drift
Internal short
±230
nV/°C
Gain Error2
AVDD1 = 5 V
±5
±45
ppm of FSR
Gain Drift
±0.2
±0.5
ppm/°C
REJECTION
Power Supply Rejection
AVDD1, AVDD2, VIN = 1 V
98
dB
Common-Mode Rejection
VIN = 0.1 V
At DC
95
dB
At 50 Hz, 60 Hz1
20 Hz output data rate (postfilter), 50 Hz
± 1 Hz and 60 Hz ± 1 Hz
120
dB
Normal Mode Rejection1
50 Hz ± 1 Hz and 60 Hz ± 1 Hz
Internal clock, 20 SPS ODR (postfilter)
71
90
dB
External clock, 20 SPS ODR (postfilter)
85
90
dB
ANALOG INPUTS
Differential Input Range
VREF = (REF+) − (REF−)
±VREF
V
Absolute Voltage Limits1
Input Buffers Disabled
AVSS − 0.05
AVDD1 + 0.05
V
Input Buffers Enabled
AVSS
AVDD1
V
Analog Input Current
Input Buffers Disabled
Input Current
±6
μA/V
Input Current Drift
±0.45
nA/V/°C
Input Buffers Enabled
Input Current
±5.5
nA
Input Current Drift
±0.1
nA/°C
Crosstalk
1 kHz input
−120
dB
REFERENCE INPUTS
Differential Input Range
VREF = (REF+) − (REF−)
1
2.5
AVDD1
V
Absolute Voltage Limits1
Input Buffers Disabled
AVSS − 0.05
AVDD1 + 0.05
V
Input Buffers Enabled
AVSS
AVDD1
V
REFIN Input Current
Input Buffers Disabled
Input Current
±9
μA/V
Input Current Drift
External clock
±0.75
nA/V/°C
Internal clock
±1
nA/V/°C
Input Buffers Enabled
Input Current
±100
nA
Input Current Drift
±2.5
nA/°C
Normal Mode Rejection1
See the Rejection parameter
Common-Mode Rejection
95
dB
BURNOUT CURRENTS
Source/Sink Current
Analog input buffers must be enabled
±10
μA


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