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AD7795BRUZ-REEL1 Scheda tecnica(PDF) 3 Page - Analog Devices

Il numero della parte AD7795BRUZ-REEL1
Spiegazioni elettronici  6-Channel, Low Noise, Low Power, 24-/16-Bit 誇-? ADC with On-Chip In-Amp and Reference
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7795BRUZ-REEL1 Scheda tecnica(HTML) 3 Page - Analog Devices

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AD7794/AD7795
Rev. D | Page 3 of 36
SPECIFICATIONS
AVDD = 2.7 V to 5.25 V, DVDD = 2.7 V to 5.25 V, GND = 0 V, all specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter1
AD7794/AD7795
Unit
Test Conditions/Comments
CHOP ENABLED
Output Update Rate
4.17 to 470
Hz nom
Settling time = 2/output update rate
No Missing Codes2
AD7794
24
Bits min
fADC ≤ 242 Hz
AD7795
16
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
±15
ppm of FSR
max
Offset Error3
±1
μV typ
Offset Error Drift vs. Temperature4
±10
nV/°C typ
Full-Scale Error3, 5
±10
μV typ
Gain Drift vs. Temperature4
±1
ppm/°C typ
Gain = 1 to 16, external reference
±3
ppm/°C typ
Gain = 32 to 128, external reference
Power Supply Rejection
100
dB min
AIN = 1 V/gain, gain ≥ 4, external reference
ANALOG INPUTS
Differential Input Voltage Ranges
±VREF/gain
V nom
VREF = REFIN(+) − REFIN(−), or internal reference,
gain = 1 to 128
Absolute AIN Voltage Limits2
Unbuffered Mode
GND − 30 mV
V min
Gain = 1 or 2
AVDD + 30 mV
V max
Buffered Mode
GND + 100 mV
V min
Gain = 1 or 2
AVDD − 100 mV
V max
In-Amp Active
GND + 300 mV
V min
Gain = 4 to 128
AVDD − 1.1
V max
Common-Mode Voltage, VCM
0.5
V min
VCM = (AIN(+) + AIN(−))/2, gain = 4 to 128
Analog Input Current
Buffered Mode or In-Amp
Active
Average Input Current2
AD7794B/AD7795B
±1
nA max
Gain = 1 or 2, update rate < 100 Hz
±250
pA max
Gain = 4 to 128, update rate < 100 Hz
±1
nA max
AIN6(+)/AIN6(−)
AD7794C
±3
nA max
Gain = 1 or 2, update rate < 100 Hz
±2
nA max
Gain = 4 to 128, update rate < 100 Hz
±3
nA max
AIN6(+)/AIN6(−)
Average Input Current Drift
±2
pA/°C typ
Unbuffered Mode
Gain = 1 or 2
Average Input Current
±400
nA/V typ
Input current varies with input voltage
Average Input Current Drift
±50
pA/V/°C typ
Normal Mode Rejection2, 6
Internal Clock
@ 50 Hz, 60 Hz
65
dB min
80 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
@ 50 Hz
80
dB min
90 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
@ 60 Hz
90
dB min
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000
External Clock
@ 50 Hz, 60 Hz
80
dB min
90 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
@ 50 Hz
94
dB min
100 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
@ 60 Hz
90
dB min
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000


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