ZNI1000TC【PDF 3/6 页】IC TEMP SENSOR NI1000 SOT23-3

ZNI1000

Issue 5 - June 2007

3

www.zetex.com

?Zetex Semiconductors plc 2007

Characteristics according to DIN43760

Resistance at a given temperature

R(T) = R0 x (1 + A x T + B x T

2

+ C x T

4

+ D x T

6

)

Formula for temperature at a given resistance

coefficients:

A = -412.6

B = 140.41

C = 0.00764

D = -6.25 x 10

-17

E = -1.25 x 10

-24

Self heating

For accurate temperature measurement it's recommended to choose a small current in order to

avoid self heating of the resistor. The temperature failure caused by the measurement current can

be calculated with:

T = P/EK

where P = I?* R is the heat power caused by the measurement current and EK is the self heating

coefficient.

The self heating coefficient for the Ni1000-SOT is:

EK = (1.7 ?0.3) mW/K (Air: 23癈; no air flow).

R0

Resistance at 0癈

B

6.650 x 10

-6

T

Temperature in 癈

C

2.805 x 10

-11

A

5.485 x 10

-3

D

-2.000 x 10

-17

R

( ) A B 1 C R

?/DIV>

+

?/DIV>

D R

5

?/DIV>

E R

7

?/DIV>

+

=

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