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AD7190 Arkusz danych(PDF) 2 Page - Analog Devices

Numer części AD7190
Szczegółowy opis  4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA
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Strona internetowa  http://www.analog.com
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AD7190 Arkusz danych(HTML) 2 Page - Analog Devices

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AD7190
Preliminary Technical Data
Rev.PrD 7/08 | Page 2
SPECIFICATIONS
AVDD = 3 V to 5.25 V; DVDD = 2.7 V to 5.25 V; GND = 0 V; REFIN1(+) = AVDD ; REFIN1(-) = GND; MCLK = 4.9152 MHz; Sinc4 filter
selected; all specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter1
AD7190B
Unit
Test Conditions/Comments
Output Update Rate
4.7 to 4800
Hz nom
Chop Disabled
1.17 to 1200
Hz nom
Chop Enabled
No Missing Codes2
24
Bits min
FS > 1
Resolution
See
RMS Noise and
Resolution
Specifications
RMS Noise and Update Rates
See
RMS Noise and
Resolution
Specifications
Integral Nonlinearity
±15
ppm of FSR max
Offset Error3
±100/Gain
µV typ
Chop Disabled
±0.5
µV typ
Chop Enabled
Offset Error Drift vs. Temperature4
±150/Gain
nV/°C typ
Gain = 1 to 16. Chop Disabled
±10
nV/°C typ
Gain = 32 to 128. Chop Disabled
±5
nV/°C typ
Chop Enabled
Offset Error Drift vs. Time
25
nV/1000 Hours typ
Full-Scale Error3, 5
±10
µV typ
Gain Drift vs. Temperature4
±1
ppm/°C typ
Gain Drift vs. Time
10
ppm/1000 Hours typ
Power Supply Rejection
100
dB min
VIN = 1 V/Gain. 120 dB typical.
ANALOG INPUTS
Differential Input Voltage Ranges
± VREF/gain
V nom
VREF = REFIN(+)
− REFIN(−) , gain = 1 to 128
± (AVDD – 1V)/gain
V min/max
gain > 1
Absolute AIN Voltage Limits2
Unbuffered Mode
GND
− 50 mV
V min
AVDD + 50 mV
V max
Buffered Mode
GND + 200 mV
V min
AVDD
− 200 mV
V max
Analog Input Current
Buffered Mode
Input Current2
±1
nA max
Gain = 1
±3
nA typ
Gain > 1
Input Current Drift
±2
pA/°C typ
Unbuffered Mode
Input Current
±5
µA/V typ
Gain = 1. Input current varies with input voltage
±1
µA/V typ
Gain > 1.
Input Current Drift
±50
pA/V/°C typ
Normal Mode Rejection2
@ 50 Hz, 60 Hz
98
dB min
10 Hz Update Rate, 50 ± 1 Hz, 60 ± 1 Hz
TBD
dB min
50 Hz Update Rate, REJ606 = 1, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz
TBD
dB min
50 Hz Update Rate, 50 ± 1 Hz
@ 60 Hz
TBD
dB min
60 Hz Update Rate, 60 ± 1 Hz
Common-Mode Rejection
@ DC
100
dB min
AIN = 1 V/gain
@ 50 Hz, 60 Hz2
100
dB min
10 Hz Update Rate, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz, 60 Hz2
100
dB min
50 ± 1 Hz (50 Hz Update Rate), 60 ± 1 Hz (60 Hz
Update Rate)
REFERENCE INPUT
REFIN Voltage
AVDD
V nom
REFIN = REFIN(+)
− REFIN(−)


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