ADR420/ADR421/ADR423/ADR425
2.5
2.0
–40°C
+25°C
1.5
+125°C
1.0
0.5
0
TIME (1s/DIV)
0
1
2
3
4
5
LOAD CURRENT (mA)
Figure 21. ADR423 Minimum Input/Output Voltage
Differential vs. Load Current
Figure 24. ADR421 Typical Noise Voltage 0.1 Hz to 10 Hz
2.5
2.0
1.5
1.0
0.5
0
–40°C
+25°C
+125°C
TIME (1s/DIV)
0
1
2
3
4
5
LOAD CURRENT (mA)
Figure 22. ADR425 Minimum Input/Output Voltage
Differential vs. Load Current
Figure 25. Typical Noise Voltage 10 Hz to 10 kHz
30
25
20
15
10
5
1k
TEMPERATURE
SAMPLE SIZE – 160
+25°C
–40°C
+25°C
+125°C
ADR425
ADR420
ADR423
ADR421
100
0
10
10
100
1k
10k
FREQUENCY (Hz)
DEVIATION (ppm)
Figure 23. ADR421 Typical Hysteresis
Figure 26. Voltage Noise Density vs. Frequency
Rev. I | Page 12 of 24
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