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AD5421CREZ-RL7 bảng dữ liệu(PDF) 5 Page - Analog Devices

tên linh kiện AD5421CREZ-RL7
Giải thích chi tiết về linh kiện  16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC
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Trang chủ  http://www.analog.com
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AD5421CREZ-RL7 bảng dữ liệu(HTML) 5 Page - Analog Devices

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


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