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AD7194BCPZ-REEL7 Arkusz danych(PDF) 3 Page - Analog Devices

Numer części AD7194BCPZ-REEL7
Szczegółowy opis  8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

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AD7194
Rev. 0 | Page 3 of 56
SPECIFICATIONS
AVDD = 3 V to 5.25 V, DVDD = 2.7 V to 5.25 V, AGND = DGND = 0 V; REFINx(+) = +2.5 V or AVDD, REFINx(−) = AGND,
MCLK = 4.92 MHz, TA = TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments1
ADC
Output Data Rate
4.7
4800
Hz
Chop disabled
1.17
1200
Hz
Chop enabled, sinc4 filter
1.56
1600
Hz
Chop enabled, sinc3 filter
No Missing Codes2
24
Bits
FS[9:0]3 > 1, sinc4 filter
24
Bits
FS[9:0]3 > 4, sinc3 filter
Resolution
See the RMS Noise and Resolution section
RMS Noise and Output
Data Rates
See the RMS Noise and Resolution section
Integral Nonlinearity
Gain = 12
±2
±10
ppm of FSR
AVDD = 5 V
±2
±15
ppm of FSR
AVDD = 3 V
Gain > 1
±5
±30
ppm of FSR
AVDD = 5 V
±15
±30
ppm of FSR
AVDD = 3 V
Offset Error4, 5
±150/gain
μV
Chop disabled
±1
μV
Chop enabled, AVDD = 5 V
±0.5
μV
Chop enabled, AVDD = 3 V
Offset Error Drift vs.
Temperature
±150/gain
nV/°C
Gain = 1 to 16; chop disabled
±5
nV/°C
Gain = 32 to 128; chop disabled
±5
nV/°C
Chop enabled
Gain Error4
±0.001
%
AVDD = 5 V, gain = 1, TA = 25°C (factory
calibration conditions)
−0.4
%
Gain = 128, before full-scale calibration
(see Table 27)
±0.003
%
Gain > 1, after internal full-scale
calibration, AVDD ≥ 4.75 V
±0.005
%
Gain > 1, after internal full-scale
calibration, AVDD < 4.75 V
Gain Drift vs.
Temperature
±1
ppm/°C
Power Supply Rejection
90
dB
Gain = 1, VIN = 1 V
95
110
dB
Gain > 1, VIN = 1 V/gain
Common-Mode Rejection
@ DC
110
dB
Gain = 1, VIN = 1 V
@ DC
105
120
dB
Gain > 1, VIN = 1 V/gain
@ 50 Hz, 60 Hz2
120
dB
10 Hz output data rate, 50 Hz ± 1 Hz,
60 Hz ± 1 Hz
@ 50 Hz2
120
dB
50 Hz output data rate, 50 Hz ± 1 Hz
@ 60 Hz2
120
dB
60 Hz output data rate, 60 Hz ± 1 Hz
@ 50 Hz2
115
dB
Fast settling, FS[9:0]3 = 6, average by 16,
50 Hz ± 1 Hz
@ 60 Hz2
115
dB
Fast settling, FS[9:0]3 = 5, average by 16,
60 Hz ± 1 Hz


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