AD5421 Analog Devices, AD5421 Datasheet - Page 17

• Manufacturer Part Number: AD5421
• Description: 16-Bit, Serial Input, Loop-Powered, 4mA to 20mA DAC
• Manufacturer: Analog Devices

Specifications of AD5421

• Resolution (bits): 16bit
• Dac Settling Time: 50µs
• Max Pos Supply (v): +52V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: SPI

Data Sheet
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
0
0
263.5
263.0
262.5
262.0
261.5
261.0
260.5
260.0
259.5
259.0
258.5
266
265
264
263
262
261
260
259
258
257
–40
Figure 31. Quiescent Current vs. Loop Supply Voltage
0
V
EXT NMOS
V
V
T
T
A
LOOP
IH
IL
A
Figure 32. Quiescent Current vs. Temperature
= 25°C
= COM
= IODV
2
= 25°C
0.05
Figure 30. REG
–20
= 24V
10
REG
REG
DD
4
OUT
OUT
0
LOOP SUPPLY VOLTAGE (V)
0.10
LOAD CURRENT (mA)
LOAD CURRENT (mA)
20
TEMPERATURE (°C)
OUT
20
Voltage vs. Load Current
6
0.15
30
40
8
40
60
0.20
V
EXT NMOS
T
LOOP
A
10
= 25°C
80
= 24V
50
0.25
12
100
0
–5
–10
–15
–20
–25
–30
–35
–40
–45
–50
60
Rev. C | Page 17 of 36
3.0
2.5
2.0
1.5
1.0
0.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
Figure 34. REFOUT1 Voltage Noise, 0.1 Hz to 10 Hz Bandwidth
0
–1
–2
–3
–4
0
V
EXT NMOS
T
4
3
2
1
0
A
LOOP
V
EXT NMOS
T
0
= 25°C
LOOP
A
V
EXT NMOS
T
= 25°C
LOOP
A
Figure 33. DV
= 24V
= 25°C
1
Figure 35. REFOUT1 Voltage vs. Load Current
1
= 24V
= 24V
1
REFOUT1 LOAD CURRENT (mA)
2
2
DV
DD
DD
3
Output Voltage vs. Load Current
LOAD CURRENT (mA)
2
3
TIME (Seconds)
4
5
4
3
6
5
7
4
6
8
9
AD5421
7
5
1
0
–1
–2
–3
–4
–5
0
–50
–100
–150
–200
–250
10