ADR370 Analog Devices, Inc., ADR370 Datasheet - Page 7

• Manufacturer Part Number: ADR370
• Description: Precision Low Power 2.048 V Sot-23 Voltage Reference
• Manufacturer: Analog Devices, Inc.

TERMINOLOGY
Temperature Coefficient
Temperature coefficient is the change of output voltage with
respect to operating temperature changes, normalized by the
output voltage at 25°C. This parameter is expressed in ppm/°C
and can be determined with the following equation
where:
V
V
V
Line Regulation
Line regulation is 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
Load regulation is 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.
O
O
O
( 25°C ) = V
(T
( T
TCV
1
2
) = V
) = V
O
⎡
⎢ ⎣
O
O
ppm
at Temperature 1.
at Temperature 2.
°
O
C
at 25°C.
⎤
⎥ ⎦
=
V
O
V
(
O
25
( )
T
°
2
C
)
−
×
V
(
T
O
2
( )
T
−
1
T
1
)
×
10
6
Rev. B | Page 7 of 12
(1)
Long-Term Stability
Long-term stability is the typical shift of output voltage at 25°C
on a sample of parts subjected to a test of 1000 hours at 25°C.
where:
V
V
Thermal Hysteresis
Thermal hysteresis is defined as the change of output voltage
after the device is cycled through temperature 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:
V
V
+125°C and back to +25°C.
O
O
O
O_TC
(t
(t
(25°C) = V
1
2
V
V
Δ
Δ
) = V
) = V
= V
O
O
V
V
_
_
O
O
HYS
HYS
O
[
=
ppm
O
O
at 25°C after temperature cycle of +25°C to −40°C to
V
[
at 25°C at Time 0.
at 25°C after 1000 hours operation at 25°C.
=
ppm
O
O
V
( )
]
t
at 25°C.
O
=
1
(
]
V
25
−
=
O
V
°
V
( )
C
O
t
O
V
1
( )
)
(
t
O
25
−
V
2
−
( )
t
V
O
V
°
1
(
O
O
C
25
_
( )
)
TC
t
−
°
2
C
V
×
)
O
10
_
TC
6
×
10
6
ADR370
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