AD5421_11 AD [Analog Devices], AD5421_11 Datasheet - Page 14

• Manufacturer Part Number: AD5421_11
• Description: 16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC
• Manufacturer: AD [Analog Devices]

AD5421
–0.0005
–0.0010
–0.0015
–0.0020
–0.0025
–0.0005
0.0015
0.0010
0.0005
0.0030
0.0025
0.0020
0.0015
0.0010
0.0005
Figure 19. Load Resistance Load Line vs. Loop Supply Voltage
2000
1750
1500
1250
1000
750
500
250
0
0
0
0
0
0
Figure 18. Full-Scale Error vs. Loop Supply Voltage
R
T
3.8mA TO 21mA RANGE
EXT V
EXT R
T
EXT V
I
EXT R
LOOP
A
LOAD
A
Figure 17. Gain Error vs. Loop Supply Voltage
= 25°C
= 25°C
REF
SET
REF
= 24mA
SET
(Voltage Between LOOP− and REG
= 250Ω
10
10
10
LOOP SUPPLY VOLTAGE (V)
LOOP SUPPLY VOLTAGE (V)
LOOP SUPPLY VOLTAGE (V)
20
20
20
30
30
OPERATING AREA
30
R
T
3.8mA TO 21mA RANGE
EXT V
EXT R
A
LOAD
= 25°C
40
40
REF
SET
= 250Ω
IN
)
40
50
50
50
60
60
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4.70
4.65
4.60
4.55
4.50
4.45
4.40
4.35
–2
–4
–6
–8
7
6
5
4
3
2
1
0
Figure 20. Compliance Voltage Headroom vs. Temperature
8
6
4
2
0
Figure 22. Loop Current Noise, 0.1 Hz to 10 Hz Bandwidth
0
0
–40
V
EXT NMOS
R
T
I
Figure 21. Loop Current Error vs. REG
LOOP
LOOP
A
LOAD
= 25°C
0.5
1
= 20mA
= 24V
= 250Ω
–20
1.0
2
REG
1.5
0
3
OUT
TEMPERATURE (°C)
2.0
TIME (Seconds)
LOAD CURRENT (mA)
4
20
2.5
5
40
3.0
6
R
3.2mA TO 24mA RANGE
EXT V
I
LOOP
LOAD
OUT
3.5
V
EXT NMOS
EXT V
I
R
T
7
60
LOOP
A
LOOP
LOAD
REF
= 24mA
Load Current
= 250Ω
= 25°C
4.0
REF
= 4mA
8
= 24V
= 250Ω
80
4.5
9
100
5
1
.0
0