Datasheet

ADR360/ADR361/ADR363/ADR364/ADR365/ADR366
Rev. D | Page 15 of 20
TERMINOLOGY
Temperature Coefficient
The change of output voltage with respect to operating temper-
ature changes normalized by the output voltage at 25°C. This
parameter is expressed in ppm/°C and can be determined by
(
)
(
)
() ()
6
10
C25
C]ppm/[ ×
−×°
−
=°
12
OUT
1
OUT
2
OUT
OUT
TTV
TVTV
TCV
where:
V
OUT
(25°C) = V
OUT
at 25°C.
V
OUT
(T
1
) = V
OUT
at Temperature 1.
V
OUT
(T
2
) = V
OUT
at Temperature 2.
Line Regulation
The change in output voltage 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 volt change 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 milliampere,
parts per million per milliampere, or ohms of dc output resistance.
Long-Term Stability
The typical shift of output voltage at 25°C on a sample of parts
subjected to a test of 1000 hours at 25°C.
(
)
()
1
OUT
0
OUTOUT
tVtVV
−
=
Δ
[]
()
()
()
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
×=Δ
6
10ppm
0
OUT
1
OUT
0
OUT
OUT
tV
t–VtV
V
where:
V
OUT
(t
0
) = V
OUT
at 25°C at Time 0.
V
OUT
(t
1
) = V
OUT
at 25°C after 1000 hours operation at 25°C.
Thermal Hysteresis
The change of output voltage after the device is cycled 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.
(
)
TCOUTOUTHYSOUT
VVV
__
C25 −°
=
[]
()
()
6
_
_
10
C25
C25
ppm ×
°
−°
=
OUT
TCOUTOUT
HYSOUT
V
VV
V
where:
V
OUT
(25°C) = V
OUT
at 25°C.
V
OUT_TC
= V
OUT
at 25°C after temperature cycle at +25°C to
−40°C to +125°C and back to +25°C.