1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones
Datasheet
IHIGH
ILOW
Substrate
PNP
DP
Anti-
Aliasing
Filter
Resistance
Error
Correction
ΔΣ
ADC
DN
Figure 3.2 Block Diagram of Temperature Monitoring Circuit
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.
to
to
to
DP
DP
DP
to
DN
to
to
DN
DN
Local Ground
Typical remote
substrate transistor
i.e. CPU substrate PNP
Typical remote
discrete PNP transistor
i.e. 2N3906
Typical remote
discrete NPN transistor
i.e. 2N3904
Figure 3.3 External Diode Configurations
SMSC EMC1053
Revision 1.37 (02-05-07)
DATA1S3HEET
SMSC [ SMSC CORPORATION ]
