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AD7783BRU-REEL Fiches technique(PDF) 2 Page - Analog Devices

No de pièce AD7783BRU-REEL
Description  Read-Only, Pin Configured 24-Bit ADC with Excitation Current Sources
Download  12 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD7783BRU-REEL Fiches technique(HTML) 2 Page - Analog Devices

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REV. B
–2–
AD7783–SPECIFICATIONS1 (V
DD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) = 2.5 V; REFIN(–) = GND;
GND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal; all specifications TMIN to TMAX, unless otherwise noted.)
Parameter
AD7783B
Unit
Test Conditions
ADC CHANNEL SPECIFICATION
Output Update Rate
19.79
Hz nom
ADC CHANNEL
No Missing Codes
2
24
Bits min
Resolution
16
Bits p-p
±160 mV Range, RANGE = 0
18
Bits p-p
±2.56 V Range, RANGE = 1
Output Noise
See Table I
Integral Nonlinearity
±10
ppm of FSR max
Typically 2 ppm,
Offset Error
±3
mV typ
AIN(+) = AIN(–) = 2.5 V
Offset Error Drift versus Temperature
±10
nV/
∞C typ
Full-Scale Error
±10
mV typ
VDD = 3 V
Gain Drift versus Temperature
±0.5
ppm/
∞C typ
Power Supply Rejection (PSR)
100
dB typ
Input Range =
±160 mV, VIN = 1/16 V
85
dB typ
Input Range =
±2.56 V, VIN = 1 V
ANALOG INPUTS
Differential Input Voltage Ranges
±160
mV nom
Range = 0
±2.56
V nom
Range = 1
ADC Range Matching
±2
mV typ
Input Voltage = 159 mV on Both Ranges
Absolute AIN Voltage Limits
GND + 100 mV
V min
VDD – 100 mV
V max
Analog Input Current
2
DC Input Current
±1nA max
DC Input Current Drift
±5pA/∞C typ
Normal-Mode Rejection
2, 3
@ 50 Hz
60
dB min
50 Hz
± 1 Hz
@ 60 Hz
94
dB min
60 Hz
± 1 Hz
Common-Mode Rejection
Input Range =
±160 mV, VIN = 1/16 V
@ DC
105
dB min
125 dB typ,
110 dB typ when Input Range =
±2.56 V
@ 50 Hz
2
100
dB min
50 Hz
± 1 Hz
@ 60 Hz
2
100
dB min
60 Hz
± 1 Hz
REFERENCE INPUT
REFIN Voltage
2.5
V nom
REFIN = REFIN(+) – REFIN(–)
REFIN Voltage Range
2
1V min
VDD
V max
Absolute REFIN Voltage Limits
2
GND – 30 mV
V min
VDD + 30 mV
V max
Average Reference Input Current
0.5
mA/V typ
Average Reference Input Current Drift
±0.01
nA/V/
∞C typ
Normal-Mode Rejection
2, 3
@ 50 Hz
60
dB min
50 Hz
± 1 Hz
@ 60 Hz
94
dB min
60 Hz
± 1 Hz
Common-Mode Rejection
Input Range =
±160 mV, VIN = 1/16 V
@ DC
100
dB typ
@ 50 Hz
110
dB typ
50 Hz
± 1 Hz
@ 60 Hz
110
dB typ
60 Hz
± 1 Hz
EXCITATION CURRENT SOURCES
(IEXC1, IEXC2)
Output Current
200
mA
Initial Tolerance at 25
∞C
±10
% typ
Drift
200
ppm/
∞C typ
Initial Current Matching at 25
∞C
±2.5
% max
No Load
Drift Matching
20
ppm/
∞C typ
Line Regulation
2.5
mA/V max
VDD = 5 V
± 5%. Typically 1.25 mA/V.
Load Regulation
300
nA/V typ
Output Compliance
VDD – 0.6
V max
GND – 30 mV
V min
FSR
REFIN
Gain
= ¥
21 024
.


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