ADR525 Analog Devices, ADR525 Datasheet - Page 7

• Manufacturer Part Number: ADR525
• Description: High Precision Shunt Mode Voltage References
• Manufacturer: Analog Devices

PARAMETER DEFINITIONS
TEMPERATURE COEFFICIENT
Temperature coefficient is defined as the change in output
voltage with respect to operating temperature changes, and is
normalized by an output voltage of 25°C. This parameter is
expressed in ppm/°C, and is determined by the following
equation:
where:
V
V
V
O
O
O
(25°C) = V
(T
(T
TCV
1
2
) = V
) = V
O
O
O
⎡
⎢ ⎣
at Temperature 1.
at Temperature 2.
ppm
°
O
C
at 25°C.
⎤
⎥ ⎦
=
V
O
V
(
O
25
( )
T
°
C
2
)
−
×
V
(
T
O
2
( )
T
−
1
T
1
)
×
10
6
(1)
Rev. A | Page 7 of 16
ADR520/ADR525/ADR530/ADR540/ADR550
THERMAL HYSTERESIS
Thermal hysteresis is defined as the change in output voltage
after the device is cycled through temperatures ranging from
+25°C to –40°C, then to +85°C, and back to +25°C. The
following equation expresses a typical value from a sample of
parts put through such a cycle:
where:
V
V
–40°C, then to +85°C, and back to +25°C.
O
O_TC
(25°C) = V
V
V
= V
O
O
_
_
O
HYS
HYS
at 25°C after a temperature cycle from +25°C to
[
O
=
ppm
at 25°C.
V
O
]
(
25
=
V
°
C
O
)
(
25
−
V
V
O
°
O
C
(
25
_
)
TC
−
°
V
C
O
)
_
TC
×
10
6
(2)