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PDF EMC1412 Data sheet ( Hoja de datos )
| Número de pieza | EMC1412 | |
| Descripción | Multiple Channel Temperature Sensor | |
| Fabricantes | SMSC Corporation | |
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EMC1412
Multiple Channel 1°C
Temperature Sensor with
Beta Compensation
PRODUCT FEATURES
Datasheet
General Description
The EMC1412 is a high accuracy, low cost, System
Management Bus (SMBus) temperature sensor.
Advanced features such as Resistance Error Correction
(REC), Beta Compensation (to support CPU diodes
requiring the BJT/transistor model including 45nm,
65nm and 90nm processors) and automatic diode type
detection combine to provide a robust solution for
complex environmental monitoring applications.
The EMC1412 monitors two temperature channels (one
external and one internal). It provides ±1°C accuracy for
both external and internal diode temperatures.
Resistance Error Correction automatically eliminates the
temperature error caused by series resistance allowing
greater flexibility in routing thermal diodes. Beta
Compensation eliminates temperature errors caused by
low, variable beta transistors common in today's fine
geometry processors. The automatic beta detection
feature monitors the external diode/transistor and
determines the optimum sensor settings for accurate
temperature measurements regardless of processor
technology. This frees the user from providing unique
sensor configurations for each temperature monitoring
application. These advanced features plus ±1°C
measurement accuracy provide a low-cost, highly
flexible and accurate solution for critical temperature
monitoring applications.
Applications
Notebook Computers
Desktop Computers
Industrial
Embedded applications
Features
Programmable SMBus address
Support for diodes requiring the BJT/transistor model
— supports 45nm, 65nm, and 90nm CPU thermal diodes
Automatically determines external diode type and
optimal settings
Resistance Error Correction
External Temperature Monitor
— ±1°C max accuracy (20°C < TDIODE < 110°C)
— 0.125°C resolution
— Supports up to 2.2nF diode filter capacitor
Internal Temperature Monitor
— ±1°C accuracy
— 0.125°C resolution
3.3V Supply Voltage
Programmable temperature limits for ALERT and
THERM
Available in small 8-pin 2mm x 3mm TDFN lead-free
RoHS compliant package
Available in small 8-pin MSOP lead-free RoHS
compliant package
SMSC EMC1412
DATASHEET
Revision 1.41 (02-23-12)
1 page  
Multiple Channel 1°C Temperature Sensor with Beta Compensation
Datasheet
List of Figures
Figure 1.1
Figure 3.1
Figure 3.2
Figure 5.1
Figure 5.2
Figure 6.1
Figure 6.2
Figure 6.3
Figure 6.4
Figure 9.1
Figure 9.2
Figure 9.3
Figure 9.4
Figure 9.5
Figure 9.6
Figure 9.7
EMC1412 Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
EMC1412 Pin Diagram, MSOP-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
EMC1412 Pin Diagram, TDFN-8 2mm x 3mm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SMBus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Isolating THERM Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
System Diagram for EMC1412 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Temperature Filter Step Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Temperature Filter Impulse Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Diode Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
EMC1412 2mm x 3mm TDFN Package Drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
EMC1412 2mm x 3mm TDFN Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
EMC1412 2mm x 3mm TDFN Package PCB Land Pattern. . . . . . . . . . . . . . . . . . . . . . . . . . 41
8-Pin MSOP / TSSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
EMC1412-1 8-Pin TDFN Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
EMC1412-A 8-Pin TDFN Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
EMC1412 8-Pin MSOP Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
SMSC EMC1412
5
DATASHEET
Revision 1.41 (02-23-12)
5 Page 
Multiple Channel 1°C Temperature Sensor with Beta Compensation
Datasheet
4.2 Electrical Specifications
Table 4.2 Electrical Specifications
VDD = 3.0V to 3.6V, TA = -40°C to 125°C, all typical values at TA = 27°C unless otherwise noted.
CHARACTERISTIC SYMBOL MIN TYP MAX UNITS
CONDITIONS
Supply Voltage
Supply Current
VDD
IDD
Standby Supply Current IDD
DC Power
3.0 3.3
3.6
430 850
V
µA
930 1200 µA
1120
µA
170 230
µA
Temperature Accuracy
Temperature Resolution
Temperature Accuracy
Internal Temperature Monitor
±0.25 ±1
°C
±2 °C
0.125
°C
External Temperature Monitor
±0.25 ±1
°C
Temperature Resolution
Conversion Time all
Channels
Capacitive Filter
tCONV
CFILTER
Output Low Voltage
Leakage Current
VOL
ILEAK
±0.5
0.125
190
±2
°C
°C
ms
2.2 2.7
nF
ALERT and THERM pins
0.4 V
±5 µA
1 conversion / sec, dynamic
averaging disabled
4 conversions / sec, dynamic
averaging enabled
> 16 conversions / sec, dynamic
averaging enabled
Device in Standby mode, no SMBus
communications, ALERT and
THERM pins not asserted.
-5°C < TA < 100°C
-40°C < TA < 125°C
+20°C < TDIODE < +110°C
0°C < TA < 100°C
-40°C < TDIODE < 127°C
default settings
Connected across external diode
ISINK = 8mA
ALERT and THERM pins
Device powered or unpowered
TA < 85°C
pull-up voltage < 3.6V
SMSC EMC1412
11
DATASHEET
Revision 1.41 (02-23-12)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EMC1412.PDF ] | |
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