(-12.8 mV/°C) x

V =

(T-20°C) + 2396 mV

(-12.8 mV/°C) x

V - 2396 mV =

(T - 20°C)

2010 mV - 2396 mV

50°C - 20°C

x

¹

·

V - 2396 mV =

(T - 20°C)

u

¹

·

LM26LV

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SNIS144F – JULY 2007 – REVISED FEBRUARY 2013

The First-Order Approximation (Linear)

For a quicker approximation, although less accurate than the second-order, over the full operating temperature

range the linear formula below can be used. Using this formula, with the constant and slope in the following set

(2)

First-Order Approximation (Linear) over Small Temperature Range

For a linear approximation, a line can easily be calculated over the desired temperature range from the

Conversion Table using the two-point equation:

(3)

coordinates of the highest temperature.

For example, if we want to determine the equation of a line with Gain 4, over a temperature range of 20°C to

50°C, we would proceed as follows:

(4)

(5)

(6)

Using this method of linear approximation, the transfer function can be approximated for one or more

temperature ranges of interest.

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