FM20 Просмотр технического описания (PDF) - Fairchild Semiconductor

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производитель

FM20

Ultra-Low-Power Analog Temperature Sensor

Fairchild Semiconductor 

PRODUCT SPECIFICATION

Typical Applications (continued)

V+

RV+

Shunt

Voltage Reference

VREF

RHYST

RVD1

0.1µF

RVD2

VTRIP

FM20

VCONTROL

V+

FM20

VOUT

VHYST2

VHYST1

VOUT

VCONTROL

VHYST2 =

(VREF) • (RVD2)

RVD1 +

(RVD2) • (RHYST)

RHYST + RVD2

VHYST1 =

(VREF) • (RVD2)

RVD2 +

(RVD1) • (RHYST)

RHYST + RVD1

VREF is set by the Shunt Voltage Reference. VCONTROL high is an alarm

state or control for activating cooling/fan.

Figure 6. Thermostat/Fan Controller

0.1µF

Bypass

Cap

VDD

GND

FM20

VOUT

CFILTER

RFILTER

Microcontroller

Analog

to

Digital

Converter

Figure 7. Digital Temperature Output Through a Microcontroller

REV. 1.0.6 1/9/03

7

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