ADR530BRT-REEL7 datasheet(7/16 Pages) AD

Part #	ADR530BRT-REEL7

Description	High Precision Shunt Mode Voltage References

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ADR520/ADR525/ADR530/ADR540/ADR550

Rev. E | Page 7 of

16

PARAMETER DEFINITIONS

TEMPERATURE COEFFICIENT

Temperature coefficient is defined as the change in output

voltage with respect to operating temperature changes and is

normalized by the output voltage at 25°C. This parameter is

expressed in ppm/°C and is determined by the following

equation:

6

1

2

1

2

10

)

(

C)

25

(

)

(

)

(

C

ppm

×

−

×

°

−

=

⎥⎦

⎤

⎢⎣

⎡

°

T

V

T

V

T

V

TCV

OUT

O

(1)

where:

VOUT(T2)

= VOUT at Temperature 2.

VOUT(T1)

= VOUT at Temperature 1.

VOUT

(25°C) = VOUT at 25°C.

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:

6

_

10

C)

25

(

C)

25

(

[ppm]

C)

25

(

×

°

−

°

=

−

°

=

OUT

END

OUT

HYS

OUT

END

OUT

HYS

OUT

V

(2)

where:

VOUT(

25°C) = VOUT at 25°C.

VOUT_END

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

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

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