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AD7173-8 Arkusz danych(PDF) 3 Page - Analog Devices

Numer części AD7173-8
Szczegółowy opis  Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD7173-8 Arkusz danych(HTML) 3 Page - Analog Devices

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Data Sheet
AD7173-8
SPECIFICATIONS
AVDD1 = 3.0 V to 5.5 V, AVDD2 = 2 V to 5.5 V, IOVDD = 2 V to 5.5 V, AVSS = DGND = 0 V, REF+ = 2.5 V, REF− = AVSS,
internal master clock = 2 MHz, TA = TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
ADC SPEED AND PERFORMANCE
Output Data Rate (ODR)
1.25
31250
SPS
No Missing Codes1
Excluding sinc3 filter at 31.25 kSPS
24
Bits
Resolution
See Table 6
Noise
See Table 6
Noise Free Resolution
Sinc5 + sinc1 filter (default)
31.25 kSPS, REF+ = 5 V
17.5
Bits
2.6 kSPS, REF+ = 5 V
18.4
Bits
1.25 SPS, REF+ = 5 V
24
Bits
ACCURACY
Integral Nonlinearity (INL)
2.5 V reference
±3
±7.5
ppm/FSR
5 V reference
±5
ppm/FSR
Offset Error2
Internal short
±40
µV
Offset Drift
Internal short
±350
nV/°C
Offset Drift vs. Time3
±450
nV/1000 hrs
Gain Error2
25°C, AVDD1 = 5 V
±10
±50
ppm/FSR
Gain Drift vs. Temperature1
±0.5
±1
ppm/FSR/°C
Gain Drift vs. Time3
±3
ppm/FSR/
1000 hrs
REJECTION
Power Supply Rejection
AVDD1 and AVDD2, VIN = 1 V
90
dB
Common-Mode Rejection
VIN = 0.1 V
At DC
95
dB
At 50 Hz and 60 Hz1
20 SPS ODR (post filter); 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 (post filter)
71
90
dB
External clock, 20 SPS ODR (post filter)
85
90
dB
ANALOG INPUTS
Differential Input Voltage Range
±VREF
V
Absolute AIN Voltage Limits1
Buffers Disabled
AVSS − 0.05
AVDD1 + 0.05
V
Buffers Enabled
AVSS
AVDD1 − 1.1
V
Analog Input Current
Buffers Enabled
Single cycle settling enabled (default)
Input Current
±2
nA
Input Current Drift
±25
pA/°C
Buffers Disabled
Input Current
±6
µA/V
Input Current Drift
External clock
±0.1
nA/V/°C
Internal clock (±2.5% clock)
±0.5
nA/V/°C
Crosstalk
1 kHz input
−120
dB
INTERNAL REFERENCE
100 nF external capacitor on REFOUT to AVSS
Output Voltage
REFOUT with respect to AVSS
2.5
V
Initial Accuracy1
TA = 25°C4
−0.1
+0.1
% of V
Temperature Coefficient
0°C to +105°C
3.5
8
ppm/°C
−40°C to +105°C
3.5
10
ppm/°C
Reference Load Current, ILOAD
IL
−10
+10
mA
Rev. 0 | Page 3 of 64


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