AD5421 Просмотр технического описания (PDF) - Analog Devices
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производитель
AD5421 Datasheet PDF : 36 Pages
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Data Sheet
Parameter1
Gain Error TC3
Full-Scale Error
Full-Scale Error TC3
Downscale Alarm Current
Upscale Alarm Current
Min
−0.047
−0.028
3.08
22.78
Typ
1
±0.0017
1
OUTPUT CHARACTERISTICS3
Loop Compliance Voltage4
Loop Current Long-Term Stability
23.99
LOOP− + 5.5
LOOP− + 12.5
100
15
Loop Current Error vs. REGOUT Load
1.2
Current
Resistive Load
0
Inductive Load
50
Power Supply Sensitivity
Output Impedance
12
400
Output TC
3
1
Output Noise
0.1 Hz to 10 Hz
50
500 Hz to 10 kHz
0.2
Noise Spectral Density
REFERENCE INPUT (REFIN PIN)3
Reference Input Voltage5
DC Input Impedance
REFERENCE OUTPUTS
REFOUT1 Pin
Output Voltage
Temperature Coefficient
75
2.498
Output Noise (0.1 Hz to 10 Hz)3
Noise Spectral Density3
Output Voltage Drift vs. Time3
Capacitive Load3
Load Current3, 6
Short-Circuit Current3
Power Supply Sensitivity3
Thermal Hysteresis3
Load Regulation3
Output Impedance
REFOUT2 Pin
Output Voltage
1.18
Output Impedance
195
256
2.5
800
2.5
1.5
2
4
7.5
245
70
200
10
4
6.5
2
285
5
0.1
0.1
1.227
72
Max
+0.047
+0.028
3.21
23
24.01
2
0.1
2.503
4
8
10
12
0.2
1.28
Rev. H | Page 5 of 36
AD5421
Unit
ppm FSR/°C
% FSR
% FSR
ppm FSR/°C
mA
mA
mA
Test Conditions/Comments
TA = 25°C
4 mA to 20 mA and 3.8 mA to 21 mA
ranges
3.2 mA to 24 mA range
V
V
ppm FSR
ppm FSR
µA/mA
kΩ
mH
µA/V
MΩ
ppm FSR/°C
ppm FSR/°C
REGOUT < 5.5 V, loop current = 24 mA
REGOUT = 12 V, loop current = 24 mA
Drift after 1000 hours at TA = 125°C,
loop current = 12 mA, internal RSET
Drift after 1000 hours at TA = 125°C,
loop current = 12 mA, external RSET
Loop current = 12 mA, load current
from REGOUT = 5 mA
See Figure 21 for a load line graph
Stable operation
Loop current = 12 mA
Loop current = 12 mA, internal RSET
Loop current = 12 mA, external RSET
nA p-p
mV rms
nA/√Hz
nA/√Hz
HART bandwidth; measured across
500 Ω load
At 1 kHz
At 10 kHz
V
For specified performance
MΩ
V
ppm/°C
ppm/°C
ppm/°C
µV p-p
nV/√Hz
nV/√Hz
ppm
nF
mA
mA
µV/V
ppm
ppm
mV/mA
Ω
V
kΩ
TA = 25°C
C grade
B grade
A grade
At 1 kHz
At 10 kHz
Drift after 1000 hours at TA = 125°C
Recommended operation
Short circuit to COM
First temperature cycle
Second temperature cycle
Measured at 0 mA and 1 mA loads
TA = 25°C
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