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ADR125AUJZ-R2 Datasheet(PDF) 7 Page - Analog Devices

Part # ADR125AUJZ-R2
Description  Precision, Micropower LDO Voltage References in TSOT
PDF  20 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADR125AUJZ-R2 Datasheet(HTML) 7 Page - Analog Devices

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ADR121/ADR125/ADR127
Rev. 0 | Page 7 of 20
TERMINOLOGY
Temperature Coefficient
The change of output voltage with respect to operating
temperature change normalized by the output voltage at 25°C.
This parameter is expressed in ppm/°C and can be determined
by
[]
()
( )
()
()
6
1
2
1
2
10
C
25
C
ppm/
×
−
×
°
−
=
°
T
T
V
T
V
T
V
TCV
O
O
O
O
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 the output due to a specified change in input
voltage. This parameter accounts for the effects of self-heating.
Line regulation is expressed in either percent per volt, parts-
per-million per volt, or microvolts per voltage changes in input
voltage.
Load Regulation
The change in output voltage due to a specified change in load
current. This parameter accounts for the effects of self-heating.
Load regulation is expressed in either microvolts per milliam-
pere, parts-per-million per milliampere, or ohms of dc output
resistance.
Long-Term Stability
Typical shift of output voltage at 25°C on a sample of parts
subjected to a test of 1000 hours at 25°C.
( )
( )
[]
()
()
()
6
1
1
10
ppm
×
−
=
Δ
−
=
Δ
O
O
O
O
O
O
O
O
O
O
t
V
t
V
t
V
V
t
V
t
V
V
where:
VO(t0) = VO at 25°C at Time 0.
VO(t1) = VO at 25°C after 1000 hours operating at 25°C.
Thermal Hysteresis
The change of output voltage after the device is cycled through
temperatures from +25°C to −40°C to +125°C and back to
+25°C. This is a typical value from a sample of parts put
through such a cycle.
where:
VO (25°C) = VO at 25°C.
VOTC = VO at 25°C after temperature cycle at +25°C to −40°C to
+125°C and back to +25°C.



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