6

TEMP

6

1.8015

V

T

1525.04

2.4182

10

3.479

-

= -

+

´

+

´

6

2

2

O

V = (

3.47 10

(T

30) ) + (1.082 10

(T

30)) + 1.8015 V

-

-

-

´

´

-

´

´

-

GND

HYST

REF

TEMP

SENSOR

+

-

V+

V

+

LM26__D

US

HYST

LM26

SNIS115S – MAY 2001 – REVISED SEPTEMBER 2015

www.ti.com

Functional Block Diagrams (continued)

Figure 5. LM26-_ _D Output Pin Block Diagram

8.3 Feature Description

8.3.1 Hysteresis

The HYST pin level sets the comparator hysteresis. Setting the HYST pin to GND selects 10°C hysteresis, while

the resistor should be less than 0.66 V. The 10-µA input leakage current requires the resistor value to be less

than 66 k

Ω.

The temperature reading of the LM26 can be calculated using the equation:

(1)

or

(2)

in series as shown in Figure 6 and Figure 7 will prevent oscillations from occurring. To determine the value of the

resistor follow the guidelines given in Table 1. The same value resistor will work for either placement of the

R (

Ω)

≤100pF

0

1nF

8200

10nF

3000

100nF

1000

≥1µF

430

8

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