1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053

13

Revision 1.44 (04-14-08)

DATASHEET

Figure 3.2 shows a block diagram of the temperature measurement circuit. The negative terminal for

the remote temperature diode, DN, is internally biased with a forward diode voltage referenced to

ground.

The external diodes in the EMC1053 are compatible with a broad range of thermal diodes that may

be connected as shown in Figure 3.3.

Figure 3.2 Block Diagram of Temperature Monitoring Circuit

Figure 3.3 External Diode Configurations

DP

DN

Anti-

Aliasing

Filter

ΔΣ

ADC

Resistance

Error

Correction

Substrate

PNP

Local

Ground

t

o

D

P

Typical

remote

substrate

transistor

i.e. CPU substrate

PNP

Typical

remote

discrete NPN transistor

i.e.

2N3904

t

o

D

N

t

o

D

P

t

o

D

N

Typical

remote

discrete PNP transistor

i.e.

2N3906

t

o

D

P

t

o

D

N