ADR380 Analog Devices, Inc., ADR380 Datasheet - Page 5

• Manufacturer Part Number: ADR380
• Description: Precision Low-drift 2.048 V/2.500 V Sot-23 Voltage References
• Manufacturer: Analog Devices, Inc.

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:
where:
V
V
V
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.
Typical Performance Characteristics
REV. A
O
O
O
(25 ° C) = V
(T
(T
TPC 1. ADR380 Output Voltage vs. Temperature
1
2
) = V
) = V
2.054
2.052
2.050
2.048
2.046
2.044
2.042
TCV
–40
O
O
at Temperature 1.
at Temperature 2.
O
O
[
at 25°C.
ppm C
–15
/
°
]
=
TEMPERATURE ( C)
V
10
O
V T
(
O
25
( )
°
C
2
SAMPLE 3
SAMPLE 1
)
–
35
×
V T
(
T
O
2
( )
–
1
T
SAMPLE 2
1
60
)
×
10
6
85
–5–
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.
where:
V
V
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.
where:
V
V
to +85°C and back to +25°C.
O
O
O
O_TC
(t
(25°C) = V
(t
0
1
) = V
TPC 2. ADR381 Output Voltage vs. Temperature
) = V
= V
2.494
2.506
2.504
2.502
2.500
2.498
2.496
O
–40
O
O
V
at 25°C after temperature cycle at +25°C to –40°C
at Time 0.
after 1,000 hours’ operation at a controlled
O_HYS
SAMPLE 2
O
∆
SAMPLE 1
at 25°C.
V
V
O
[
–15
[
O_HYS
ppm
ppm
∆
V
O
]
]
=
=
=
SAMPLE 3
=
TEMPERATURE( C)
V
V
V
V t
10
O
O
O
O
(
(
( )
( )
25
25
V
t
V t
0
0
ADR380/ADR381
O
O
°
°
(
C
C
–V t
–V t
( )
25
)
)
0
–
–
35
°
O
O
C
V
V
( )
( )
)
O_TC
O_TC
1
1
×
10
×
60
10
6
6
85