EMC1072 datasheet(21/36 Pages) SMSC

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1°C Temperature Sensor with Selectable Address

Datasheet

SMSC EMC1072

Revision 1.39 (10-11-10)

DATASHEET

Note 5.1

In default mode, all temperatures < 0°C will be reported as 0°C.

Note 5.2

In the extended range, all temperatures < -64°C will be reported as -64°C.

Note 5.3

For the default range, all temperatures > +127.875°C will be reported as +127.875°C.

Note 5.4

For the extended range, all temperatures > +191.875°C will be reported as +191.875°C.

5.10

External Diode Connections

The EMC1072 can be configured to measure a discrete 2N3904 diode-connected transistor or an AMD

processor diode. The diode can be connected as shown in Figure 5.5, "Diode Configurations".

190

011 1111 1111

111 1111 0000

191

011 1111 1111

111 1111 1000

>= 191.875

011 1111 1111

111 1111 1111

Note 5.4

Figure 5.5 Diode Configurations

Table 5.2 EMC1072 Temperature Data Format (continued)

TEMPERATURE (°C)

DEFAULT RANGE 0°C TO 127°C

EXTENDED RANGE RANGE -64°C

TO 191°C

Local Ground

to DP

Typical remote

substrate transistor

e.g. CPU substrate PNP

Typical remote

discrete NPN transistor

e.g. 2N3904

to DN

to DP

to DN

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