AD7783(RevB) Просмотр технического описания (PDF) - Analog Devices
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AD7783
(Rev.:RevB)
(Rev.:RevB)
Analog Devices
AD7783 Datasheet PDF : 12 Pages
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AD7783–SPECIFICATIONS1
(VDD = 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 Codes2
Resolution
Output Noise
Integral Nonlinearity
Offset Error
Offset Error Drift versus Temperature
Full-Scale Error
Gain Drift versus Temperature
Power Supply Rejection (PSR)
ANALOG INPUTS
Differential Input Voltage Ranges
ADC Range Matching
Absolute AIN Voltage Limits
Analog Input Current2
DC Input Current
DC Input Current Drift
Normal-Mode Rejection2, 3
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz2
@ 60 Hz2
24
16
18
See Table I
± 10
±3
± 10
± 10
± 0.5
100
85
± 160
± 2.56
±2
GND + 100 mV
VDD – 100 mV
±1
±5
60
94
105
100
100
Bits min
Bits p-p
Bits p-p
ppm of FSR max
mV typ
nV/∞C typ
mV typ
ppm/∞C typ
dB typ
dB typ
± 160 mV Range, RANGE = 0
± 2.56 V Range, RANGE = 1
Typically
2
ppm,
FSR
=
2 ¥ 1.024 REFIN
Gain
AIN(+) = AIN(–) = 2.5 V
VDD = 3 V
Input Range = ± 160 mV, VIN = 1/16 V
Input Range = ± 2.56 V, VIN = 1 V
mV nom
V nom
mV typ
V min
V max
nA max
pA/∞C typ
dB min
dB min
dB min
dB min
dB min
Range = 0
Range = 1
Input Voltage = 159 mV on Both Ranges
50 Hz ± 1 Hz
60 Hz ± 1 Hz
Input Range = ± 160 mV, VIN = 1/16 V
125 dB typ,
110 dB typ when Input Range = ± 2.56 V
50 Hz ± 1 Hz
60 Hz ± 1 Hz
REFERENCE INPUT
REFIN Voltage
REFIN Voltage Range2
Absolute REFIN Voltage Limits2
Average Reference Input Current
Average Reference Input Current Drift
Normal-Mode Rejection2, 3
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz
@ 60 Hz
2.5
1
VDD
GND – 30 mV
VDD + 30 mV
0.5
± 0.01
60
94
100
110
110
V nom
V min
V max
V min
V max
mA/V typ
nA/V/∞C typ
dB min
dB min
dB typ
dB typ
dB typ
REFIN = REFIN(+) – REFIN(–)
50 Hz ± 1 Hz
60 Hz ± 1 Hz
Input Range = ± 160 mV, VIN = 1/16 V
50 Hz ± 1 Hz
60 Hz ± 1 Hz
EXCITATION CURRENT SOURCES
(IEXC1, IEXC2)
Output Current
Initial Tolerance at 25∞C
Drift
Initial Current Matching at 25∞C
Drift Matching
Line Regulation
Load Regulation
Output Compliance
200
± 10
200
± 2.5
20
2.5
300
VDD – 0.6
GND – 30 mV
mA
% typ
ppm/∞C typ
% max
ppm/∞C typ
mA/V max
nA/V typ
V max
V min
No Load
VDD = 5 V ± 5%. Typically 1.25 mA/V.
–2–
REV. B
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