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AD7191BRUZ-REEL Arkusz danych(PDF) 4 Page - Analog Devices

Numer części AD7191BRUZ-REEL
Szczegółowy opis  Pin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD7191BRUZ-REEL Arkusz danych(HTML) 4 Page - Analog Devices

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AD7191
Rev. A | Page 4 of 20
Parameter1
AD7191B
Unit
Test Conditions/Comments
Analog Input Current
Input Current2
±2
nA max
Gain = 1
±3
nA max
Gain > 1
Input Current Drift
±5
pA/°C typ
REFERENCE INPUT
REFIN Voltage
AVDD
V nom
REFIN = REFIN(+)
− REFIN(−).
Reference Voltage Range2
1
V min
AVDD
V max
The differential input must be limited to
±(AVDD − 1.25 V)/gain when gain > 1.
Absolute REFIN Voltage Limits2
AGND – 50 mV
V min
AVDD + 50 mV
V max
Average Reference Input Current
4.5
μA/V typ
Average Reference Input Current
Drift
±0.03
nA/V/°C typ
External clock.
±1.3
nA/V/°C typ
Internal clock.
Normal-Mode Rejection2
Same as for analog
inputs
Common-Mode Rejection
100
dB typ
TEMPERATURE SENSOR
Accuracy
+2
°C typ
Applies after user calibration at one temperature.
Sensitivity
2815
Codes/°C typ
BRIDGE POWER-DOWN SWITCH
RON
10
Ω max
Allowable Current2
30
mA max
Continuous current.
INTERNAL/EXTERNAL CLOCK
Internal Clock
Frequency
4.92 + 4%
MHz min/MHz max
Duty Cycle
50:50
% typ
External Clock/Crystal
Frequency
4.9152
MHz nom
2.4576/5.12
MHz min/MHz max
Input Low Voltage, VINL
0.8
V max
DVDD = 5 V.
0.4
V max
DVDD = 3 V.
Input High Voltage, VINH
2.5
V min
DVDD = 3 V.
3.5
V min
DVDD = 5 V.
Input Current
±10
μA max
MCLKIN = DVDD or DGND.
LOGIC INPUTS
Input High Voltage, VINH2
2
V min
Input Low Voltage, VINL2
0.8
V max
Hysteresis2
0.1/0.25
V min/V max
Input Currents
±10
μA max
VIN = DVDD or DGND.
LOGIC OUTPUT (DOUT/RDY)
Output High Voltage, VOH 2
DVDD
− 0.6
V min
DVDD = 3 V, ISOURCE = 100 μA.
Output Low Voltage, VOL2
0.4
V max
DVDD = 3 V, ISINK = 100 μA.
Output High Voltage, VOH2
4
V min
DVDD = 5 V, ISOURCE = 200 μA.
Output Low Voltage, VOL2
0.4
V max
DVDD = 5 V, ISINK = 1.6 mA.


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