ADR381ART-R2 データシートの表示（PDF） - Analog Devices
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ADR381ART-R2 Datasheet PDF : 12 Pages
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ADR380/ADR381
PARAMETER DEFINITIONS
Temperature Coefficient
The change of output voltage over the operating temperature
change and normalized by the output voltage at 25°C, expressed
in ppm/°C. The equation follows:
[ ] TCVO
ppm/°C
=
VO (T2) –VO (T1)
VO (25°C) × (T2 – T1)
×
106
where:
VO (25°C) = VO at 25°C.
VO (T1) = VO at Temperature 1.
VO (T2) = VO at Temperature 2.
Line Regulation
The change in output voltage due to a specified change in input
voltage. It includes the effects of self-heating. Line regulation is
expressed in either percent per volt, parts-per-million per volt,
or microvolts per volt change in input voltage.
Load Regulation
The change in output voltage due to a specified change in load
current. It includes the effects of self-heating. Load regulation is
expressed in either microvolts per milliampere, parts-per-
million per milliampere, or ohms of dc output resistance.
Long-Term Stability
A typical shift in output voltage over 1,000 hours at a controlled
temperature. The graphs TPC 24 and TPC 25 show a sample
of parts measured at different intervals in a controlled environ-
ment of 50°C for 1,000 hours.
∆VO =VO (t0 ) –VO (t1)
[ ] ( ) ( ) ( ) ∆VO
ppm
= VO t0 – VO t1
VO t0
× 106
where:
VO (t0) = VO at Time 0.
VO (t1) = VO after 1,000 hours’ operation at a controlled
temperature.
Note that 50°C was chosen since most applications we have
experienced run at a higher temperature than 25°C.
Thermal Hysteresis
The change of output voltage after the device is cycled through
temperature from +25°C to –40°C to +85°C and back to +25°C.
This is a typical value from a sample of parts put through
such a cycle.
( ) VO_HYS =VO 25°C –VO_TC
[ ] ( ( ) ) VO_HYS
ppm
= VO 25°C –VO_TC
VO 25°C
× 106
where:
VO (25°C) = VO at 25°C.
VO_TC = VO at 25°C after temperature cycle at +25°C to –40°C
to +85°C and back to +25°C.
Typical Performance Characteristics
2.054
2.052
2.050
2.048
2.046
SAMPLE 1
SAMPLE 2
SAMPLE 3
2.044
2.042
–40
–15
10
35
60
85
TEMPERATURE (؇C)
TPC 1. ADR380 Output Voltage vs. Temperature
2.506
2.504
2.502
SAMPLE 1
2.500
2.498 SAMPLE 2
SAMPLE 3
2.496
2.494
–40
–15
10
35
60
85
TEMPERATURE(؇C)
TPC 2. ADR381 Output Voltage vs. Temperature
REV. A
–5–
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