Datasheet

Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550
Rev. B | Page 35 of 37
POWER CYCLE HYSTERESIS
By power cycling a large number of samples, the power cycle
hysteresis can be determined. To keep this measurement
independent of other variables and environmental effects, the
power cycle testing was performed using a high precision
measurement system, including an ultrastable oil bath.
Figure 94 shows the power cycle hysteresis. The units were
powered down for approximately 4 hours and then powered up.
The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/
ADR4550 do not have any power cycle hysteresis even after a
long power-down period, making these devices very suitable for
equipment which must maintain its calibration accuracy
between power cycles.
4370 4380 4390 4400 4410 4420 4430 4440 4450 4460 4470
TIME (Hours)
–20
0
20
40
60
80
100
120
CHANGE IN OUTPUT VOLTAGE (ppm)
V
SY
= 5V
108 UNITS
T
A
= 25°C
SAMPLE 1
SAMPLE 2
SAMPLE 3
10203-806
Figure 95. Power Cycle Hysteresis
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