ADR550ART-REEL7(RevA) データシートの表示（PDF） - Analog Devices

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ADR550ART-REEL7
(Rev.:RevA)

High Precision Shunt Mode Voltage References

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:

TCVO

⎡

⎢⎣

ppm ⎤

°C ⎥⎦

=

VO (T2 ) − VO (T1)

VO (25°C)× (T2 − T1)

× 106

(1)

where:

VO(25°C) = VO at 25°C.

VO(T1) = VO at Temperature 1.

VO(T2) = VO at Temperature 2.

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:

VO _ HYS = VO (25°C) −VO _TC

VO _ HYS [ppm] =

VO (25°C) −VO _TC

VO (25°C)

×106

(2)

where:

VO(25°C) = VO at 25°C.

VO_TC = VO at 25°C after a temperature cycle from +25°C to

–40°C, then to +85°C, and back to +25°C.

Rev. A | Page 7 of 16

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