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AD5421BREZ-REEL Datasheet(Fiches technique) 16 Page - Analog Devices

Numéro de pièce AD5421BREZ-REEL
Description  16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC
Télécharger  36 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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 16 page
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AD5421
Data Sheet
Rev. F | Page 16 of 36
0.0015
–0.0025
–0.0020
–0.0015
–0.0010
–0.0005
0
0.0005
0.0010
0
60
50
40
30
20
10
LOOP SUPPLY VOLTAGE (V)
RLOAD = 250Ω
TA = 25°C
3.8mA TO 21mA RANGE
EXT VREF
EXT RSET
Figure 18. Gain Error vs. Loop Supply Voltage
0.0030
0.0025
0.0020
0.0015
0.0010
0.0005
0
–0.0005
0
60
50
40
30
20
10
LOOP SUPPLY VOLTAGE (V)
RLOAD = 250Ω
TA = 25°C
3.8mA TO 21mA RANGE
EXT VREF
EXT RSET
Figure 19. Full-Scale Error vs. Loop Supply Voltage
2000
0
250
500
750
1000
1250
1500
1750
0
50
40
30
20
10
LOOP SUPPLY VOLTAGE (V)
TA = 25°C
EXT VREF
ILOOP = 24mA
EXT RSET
OPERATING AREA
Figure 20. Load Resistance Load Line vs. Loop Supply Voltage
(Voltage Between LOOP− and REGIN)
4.70
4.35
4.40
4.45
4.50
4.55
4.60
4.65
–40
100
80
60
40
20
0
–20
TEMPERATURE (°C)
RLOAD = 250Ω
3.2mA TO 24mA RANGE
EXT VREF
ILOOP = 24mA
Figure 21. Compliance Voltage Headroom vs. Temperature
7
6
5
4
3
2
1
0
0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
REGOUT LOAD CURRENT (mA)
VLOOP = 24V
EXT NMOS
RLOAD = 250Ω
TA = 25°C
ILOOP = 20mA
Figure 22. Loop Current Error vs. REGOUT Load Current
8
–8
–6
–4
–2
0
2
4
6
0
10
9
8
7
6
5
4
3
2
1
TIME (Seconds)
VLOOP = 24V
EXT NMOS
EXT VREF
ILOOP = 4mA
RLOAD = 250Ω
TA = 25°C
Figure 23. Loop Current Noise, 0.1 Hz to 10 Hz Bandwidth




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