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EMC2101-R-ACZL-TR датащи(PDF) 23 Page - SMSC Corporation

номер детали EMC2101-R-ACZL-TR
подробное описание детали  SMBus Fan Control with 1째C Accurate Temperature Monitoring
PDF  57 Pages
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производитель  SMSC [SMSC Corporation]
домашняя страница  http://www.smsc.com
Logo SMSC - SMSC Corporation

EMC2101-R-ACZL-TR датащи(HTML) 23 Page - SMSC Corporation

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SMBus Fan Control with 1°C Accurate Temperature Monitoring
Datasheet
SMSC EMC2101
23
Revision 2.54 (06-16-09)
DATASHEET
.
Figure 5.3 shows a block diagram of the temperature measurement circuit. As shown, the EMC2101
incorporates a delta-sigma analog to digital converter that integrates the temperature diode voltage
from multiple bias currents.
The external temperature diodes can be connected as shown in Figure 5.4.
5.5.1
Temperature Measurement Results and Data
The results of the internal and external temperature measurements are stored in the internal and
external temperature registers respectively. These are then compared with the values stored in the
High Limit Registers. The internal temperature measurements are stored in 8-bit format while the
external temperature measurements are stored in 11-bit format.
Figure 5.3 Block Diagram of Temperature Monitoring Circuit
Figure 5.4 External Diode configurations
CPU
substrate
PNP
ILOW
IHIGH
Resistance
Error
Correction
Input
Filter &
Sampler
ADC
ΔΣ
Local Ground
to
DP
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
to
DN
to
DP
to
DN
to
DP
to
DN



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