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AD7191BRUZ Arkusz danych(PDF) 3 Page - Analog Devices

Numer części AD7191BRUZ
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 Arkusz danych(HTML) 3 Page - Analog Devices

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AD7191
Rev. A | Page 3 of 20
SPECIFICATIONS
AVDD = 3 V to 5.25 V; DVDD = 2.7 V to 5.25 V; AGND = DGND = 0 V; REFIN(+) = AVDD; REFIN(−) = AGND; MCLK = 4.92 MHz; all
specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter1
AD7191B
Unit
Test Conditions/Comments
Output Data Rate
10, 50, 60, 120
Hz nom
No Missing Codes2
24
Bits min
Resolution
See the RMS Noise and Resolution Specifications
section
RMS Noise and Update Rates
See the RMS Noise and Resolution Specifications
section
Integral Nonlinearity
Gain = 12
±10
ppm of FSR max
±2 ppm typical, AVDD = 5 V
±15
ppm of FSR max
±2 ppm typical., AVDD = 3 V
Gain > 1
±5
ppm of FSR typ
AVDD = 5 V
±12
ppm of FSR typ
AVDD = 3 V
Offset Error
±150/gain
μV typ
Offset Error Drift vs. Temperature
±150/gain
nV/°C typ
Gain = 1 or 8
±5
nV/°C typ
Gain = 64 or 128
Offset Error Drift vs. Time
25
nV/1000 hours typ
Gain = 64 or 128
Gain Error
±0.4
% typ
Gain Drift vs. Temperature
±1
ppm/°C typ
Gain Drift vs. Time
10
ppm/1000 hours typ
Gain = 1
Power Supply Rejection
90
dB typ
Gain = 1, AIN = 1 V
95
dB min
110 dB typical, gain > 1, AIN = 1 V/gain
Normal Mode Rejection2
Internal Clock
@ 50 Hz, 60 Hz
100
dB min
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
74
dB min
50 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
@ 60 Hz
97
dB min
60 Hz output data rate, 60 ± 1 Hz.
External Clock
@ 50 Hz, 60 Hz
120
dB min
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz.
82
dB min
50 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz.
@ 60 Hz
120
dB min
60 Hz output data rate, 60 ± 1 Hz
Common-Mode Rejection
@ DC2
100
dB min
Gain = 1, AIN = 1 V
@ DC
110
dB min
Gain > 1, AIN = 1 V/gain
@ 50 Hz, 60 Hz2
120
dB min
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz, 60 Hz2
120
dB min
50 ± 1 Hz (50 Hz output data rate), 60 ± 1 Hz
(60 Hz output data rate)
ANALOG INPUTS
Differential Input Voltage Ranges
±VREF/gain
V nom
VREF = REFIN(+)
− REFIN(−), gain = 1, 8, 64, or 128
±(AVDD – 1.25 V)/gain
V min/V max
Gain > 1
Absolute AIN Voltage Limits2
AGND + 250 mV
V min
AVDD
− 250 mV
V max


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