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AD7719 Datasheet(PDF) 4 Page - Analog Devices

Part # AD7719
Description  Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC
PDF  40 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7719 Datasheet(HTML) 4 Page - Analog Devices

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REV. 0
AD7719
–4–
Parameter
AD7719B
Unit
Test Conditions
AUXILIARY CHANNEL (continued)
Offset Error
3
± 3
µV typ
Selected Channel = AIN5/AIN6
Offset Error Drift vs. Temperature
4
±10
nV/
°C typ
Full-Scale Error
8, 9
±0.75
LSB typ
Gain Drift vs. Temperature
4
0.5
ppm/
°C typ
Negative Full-Scale Error
± 1
LSB typ
Power Supply Rejection (PSR)
70
dB min
AIN = 1 V Input Range =
±2.5 V, Typically 80 dB
ANALOG INPUTS
Differential Input Voltage Ranges
±REFIN2
V nom
ARN = 1
±REFIN2/2
V nom
ARN = 0
Absolute AIN Voltage Limits
AGND – 30 mV
V min
Unbuffered Input
AVDD + 30 mV
V max
Analog Input Current
DC Input Current
±125
nA/V typ
Input Current Varies with Input Voltage
DC Input Current Drift
± 2
pA/V/
°C typ
Normal-Mode Rejection
2, 6
@ 50 Hz
100
dB min
50 Hz
±1 Hz, SF = 82
@ 60 Hz
100
dB min
60 Hz
±1 Hz, SF = 68
Common-Mode Rejection
@ DC
85
dB min
Input Range =
±2.5 V, AIN = 1 V
@ 50 Hz
2
90
dB min
50 Hz
±1 Hz, Range = 2.5 V, AIN = 1 V
@ 60 Hz
2
90
dB min
60 Hz
±1 Hz, Range = 2.5 V, AIN = 1 V
REFERENCE INPUT (REFIN2)
With Respect to AGND
REFIN2 Voltage
2.5
V nom
REFIN2 Range
2
1
V min
AVDD
V max
Reference DC Input Current
2
0.2
µA/V typ
Reference DC Input Current Drift
0.003
nA/V/
°C typ
EXCITATION CURRENT SOURCES
(IEXC1 and IEXC2)
Output Current
200
µA nom
Initial Tolerance at 25
°C
±10
% typ
Drift
20
ppm/
°C typ
Initial Current Matching at 25
°C
± 1
% typ
Matching between IEXC1 and IEXC2
No Load
Drift Matching
1
ppm/
°C typ
Line Regulation (AVDD)
2.1
µA/V max
AVDD = 5 V
± 5%. Typically 1.25 µA/V
Load Regulation
300
nA/V typ
Output Compliance
AVDD – 0.6
V max
AGND –30 mV
V min
LOW-SIDE POWER SWITCHES
(SW1 AND SW2)
RON
5
Ω max
AVDD = 5 V. Typically 3
Ω
7
Ω max
AVDD = 3 V. Typically 4.5
Ω
Allowable Current
2
20
mA max
Continuous Current per Switch
TEMPERATURE SENSOR
Accuracy
See TPC 5
°C typ
TRANSDUCER BURNOUT
AIN(+) Current
–100
nA typ
AIN(–) Current
+100
nA typ
Initial Tolerance @ 25
°C
±15
% typ
Drift
0.03
%/
°C typ
SYSTEM CALIBRATION
10, 2
Full-Scale Calibration Limit
1.05
× FS11
V max
Zero-Scale Calibration Limit
–1.05
× FS
V min
Input Span
0.8
× FS
V min
2.1
× FS
V max



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