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AD7788ARM Scheda tecnica(PDF) 3 Page - Analog Devices

Il numero della parte AD7788ARM
Spiegazioni elettronici  Low Power, 16-/24-Bit, Sigma-Delta ADCs
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7788ARM Scheda tecnica(HTML) 3 Page - Analog Devices

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AD7788/AD7789
Rev. B | Page 3 of 20
SPECIFICATIONS
AD7789
VDD = 2.5 V to 5.25 V; REFIN(+) = 2.5 V; REFIN(−) = GND; GND = 0 V; all specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter1
AD7789B
Unit
Test Conditions/Comments
ADC CHANNEL SPECIFICATION
Output Update Rate
16.6
Hz nom
ADC CHANNEL
No Missing Codes2
24
Bits min
Resolution
19
Bits p-p
Output Noise
1.5
μV rms typ
Integral Nonlinearity
±15
ppm of FSR max
Offset Error
±3
μV typ
Offset Error Drift vs. Temperature
±10
nV/°C typ
Full-Scale Error3
±10
μV typ
Gain Drift vs. Temperature
±0.5
ppm/°C typ
Power Supply Rejection
90
dB min
100 dB typ, AIN = 1 V
ANALOG INPUTS
Differential Input Voltage Ranges
±REFIN
V nom
REFIN = REFIN(+) − REFIN(−)
Absolute AIN Voltage Limits2
GND − 30 mV
V min
VDD + 30 mV
V max
Analog Input Current
Input current varies with input voltage
Average Input Current2
±400
nA/V typ
Average Input Current Drift
±50
pA/V/°C typ
Normal-Mode Rejection2
@ 50 Hz, 60 Hz
65
dB min
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
Common-Mode Rejection
AIN = 1 V
@ DC
90
dB min
100 dB typ
@ 50 Hz, 60 Hz2
100
dB min
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
REFERENCE INPUT
REFIN Voltage
2.5
V nom
REFIN = REFIN(+) − REFIN(−)
Reference Voltage Range2
0.1
V min
VDD
V max
Absolute REFIN Voltage Limits2
GND − 30 mV
V min
VDD + 30 mV
V max
Average Reference Input Current
0.5
μA/V typ
Average Reference Input Current Drift
±0.03
nA/V/°C typ
Normal-Mode Rejection2
@ 50 Hz, 60 Hz
65
dB min
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
Common-Mode Rejection
AIN = 1 V
@ DC
110
dB typ
@ 50 Hz, 60 Hz
110
dB typ
50 Hz ± 1 Hz, 60 Hz ± 1 Hz
1 Temperature range:
40°C to +105°C.
2 Specification is not production tested but is supported by characterization data at initial product release.
3 Full-scale error applies to both positive and negative full scale and applies at the factory calibration conditions (VDD = 4 V).


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