Datasheet

AD5421 Data Sheet
Rev. G | Page 18 of 36
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
0
–50
–45
–40
–35
–30
–25
–20
–15
–10
–5
0 12
0 0.250.200.150.100.05
108642
REG
OUT
VOLTAGE (V)
REG
OUT
VOLTAGE CHANGE (mV)
REG
OUT
LOAD CURRENT (mA)
REG
OUT
LOAD CURRENT (mA)
V
LOOP
= 24V
EXT NMOS
T
A
= 25°C
09128-030
Figure 31. REG
OUT
Voltage vs. Load Current
263.5
258.5
259.0
259.5
260.0
260.5
261.0
261.5
262.0
262.5
263.0
0 6050403020
10
QUIESCENT CURRENT (µA)
LOOP SUPPLY VOLTAGE (V)
T
A
= 25°C
09128-031
Figure 32. Quiescent Current vs. Loop Supply Voltage
266
257
258
259
260
261
262
263
264
265
–40 100806040200–20
QUIESCENT CURRENT (µA)
TEMPERATURE (°C)
V
LOOP
= 24V
EXT NMOS
V
IH
= IODV
DD
V
IL
= COM
T
A
= 25°C
09128-032
Figure 33. Quiescent Current vs. Temperature
3.5
0
0
–50
–100
–150
–200
–250
0.5
1.0
1.5
2.0
2.5
3.0
0
1 2 3 4 5
DV
DD
OUTPUT VOLTAGE (V)
DV
DD
OUTPUT VOLTAGE CHANGE (mV)
DV
DD
LOAD CURRENT (mA)
09128-101
V
LOOP
= 24V
EXT NMOS
T
A
= 25°C
Figure 34. DV
DD
Output Voltage vs. Load Current
4
–4
–3
–2
–1
0
1
2
3
0 10854 976321
REFOUT1 VOLTAGE NOISE (µV)
TIME (Seconds)
V
LOOP
= 24V
EXT NMOS
T
A
= 25°C
09128-034
Figure 35. REFOUT1 Voltage Noise, 0.1 Hz to 10 Hz Bandwidth
3.0
2.5
2.0
1.5
1.0
0.5
0
1
–5
–4
–3
–2
–1
0
0 765
4321
REFOUT1 VOLTAGE (V)
REFOUT1 VOLTAGE CHANGE (mV)
REFOUT1 LOAD CURRENT (mA)
V
LOOP
= 24V
EXT NMOS
T
A
= 25°C
09128-035
Figure 36. REFOUT1 Voltage vs. Load Current