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PDF EMC1412 Data sheet ( Hoja de datos )
| Número de pieza | EMC1412 | |
| Descripción | Multiple Channel Temperature Sensor | |
| Fabricantes | Microchip | |
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EMC1412
Multiple Channel 1°C Temperature Sensor with
Beta Compensation
PRODUCT FEATURES
Data Sheet
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) 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
including advanced processor geometries
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 RoHS
compliant package
Available in small 8-pin MSOP RoHS compliant
package
2014 Microchip Technology Inc.
DS20005273A-page 1
1 page  
Multiple Channel 1°C Temperature Sensor with Beta Compensation
Data Sheet
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
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
8-Pin MSOP / TSSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
EMC1412-1 8-Pin TDFN Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
EMC1412-A 8-Pin TDFN Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
EMC1412 8-Pin MSOP Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
2014 Microchip Technology Inc.
DS20005273A-page 5
5 Page 
Multiple Channel 1°C Temperature Sensor with Beta Compensation
Data Sheet
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
DC Power
Supply Voltage
Supply Current
VDD
3.0 3.3
3.6
V
IDD
430 850
μA
1 conversion / sec, dynamic
averaging disabled
930 1200 μA
4 conversions / sec, dynamic
averaging enabled
1120
μA > 16 conversions / sec, dynamic
averaging enabled
Standby Supply Current IDD
170 230
μA
Device in Standby mode, no SMBus
communications, ALERT and
THERM pins not asserted.
Temperature Accuracy
Temperature Resolution
Internal Temperature Monitor
±0.25 ±1
°C
±2 °C
0.125
°C
-5°C < TA < 100°C
-40°C < TA < 125°C
Temperature Accuracy
Temperature Resolution
External Temperature Monitor
±0.25 ±1
°C
±0.5
0.125
±2
°C
°C
+20°C
0°C <
T<AT<DI1O0D0E°C<
+110°C
-40°C < TDIODE < 127°C
Conversion Time all
Channels
tCONV
190
ms default settings
Capacitive Filter
CFILTER
2.2 2.7
nF
ALERT and THERM pins
Connected across external diode
Output Low Voltage
Leakage Current
VOL
ILEAK
0.4
V ISINK = 8mA
±5 μA ALERT and THERM pins
Device powered or unpowered
TpAull<-u8p5v°oCltage < 3.6V
2014 Microchip Technology Inc.
DS20005273A-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EMC1412.PDF ] | |
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