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PDF EMC1183 Data sheet ( Hoja de datos )
| Número de pieza | EMC1183 | |
| Descripción | Triple Channel Temperature Sensor | |
| Fabricantes | SMSC | |
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EMC1183
Triple Channel 1°C Temperature Sensor with Beta
Compensation and 1.8V SMBus Communications
PRODUCT FEATURES
General Description
The EMC1183 is a high accuracy, low cost, 1.8V System
Management Bus (SMBus) compatible temperature sensor.
Advanced features such as Resistance Error Correction (REC),
Beta Compensation (to support CPU diodes requiring the
BJT/transistor model including 65nm and lower geometry
processors) and automatic diode type detection combine to
provide a robust solution for complex environmental monitoring
applications. The ability to communicate at 1.8V SMBus levels
provides compatible I/O for the advanced processors found in
today’s tablet and smartphone applications.
The EMC1183 monitors three temperature channels (two
external and one internal), providing ±1°C accuracy for both
external and internal diode temperatures.
REC automatically eliminates the temperature error caused by
series resistance allowing greater flexibility in routing thermal
diodes. Frequency hopping* and analog filters ensure remote
diode traces can be as far as eight (8) inches without degrading
the signal. 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.
Datasheet
Applications
Notebook Computers
Desktop Computers
Industrial
Embedded applications
Features
Programmable SMBus address
Support for diodes requiring the BJT/transistor model
— Supports 65nm and lower geometry CPU thermal
diodes
Pin and register compatible with EMC1413
Automatically determines external diode type and
optimal settings
Resistance Error Correction
Frequency hops the remote sample frequency to reject
DC converter and other coherent noise sources*
Consecutive Alert queue to further reduce false Alerts
Up to 2 External Temperature Monitors
— 25°C typ, ±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
1.8V SMBus operation
Programmable temperature limits for ALERT/THERM2
(85°C default high limit and 0°C default low limit) and
THERM (85°C default)
Available in small 10-pin 3mm x 3mm DFN RoHS
compliant package
DP1
DN1
DP2
DN2
ALERT / THERM2
THERM / ADDR
EMC1183
Switching
Current
Analog
Mux
ΔΣ ADC
Internal
Temp Diode
Interupt Masking
SMBus Address Decode
VDD
External
Temperature
Register(s)
Internal
Temperature
Register
GND
Status Registers
Conversion Rate Register
Low Limit Registers
High Limit Registers
THERM Limit Register
THERM Hysteresis Register
Configuration Register
* Technology covered under the US patent 7,193,543.
SMCLK
SMDATA
CPU /
GPU
Thermal
Junction
DP1 VDD
DN1
EMC1183
DP2
DN2
GND
VDD =
3.3V
1.8V 1.8V-3.3V
Host
SMCLK
SMDATA
ALERT / THERM2
SMBus
Interface
THERM / ADDR
Power
Control
SMSC EMC1183
DATASHEET
Revision 1.0 (07-11-13)
1 page  
Triple Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications
Datasheet
List of Figures
Figure 1.1
Figure 2.1
Figure 4.1
Figure 4.4
Figure 5.1
Figure 5.2
Figure 5.3
Figure 5.4
Figure 5.5
Figure 8.1
Figure 8.2
Figure 8.3
Figure 8.4
EMC1183 Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
EMC1183 Pin Diagram, DFN-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SMBus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Isolating the THERM pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
System Diagram for EMC1183 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Isolating THERM Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Isolating ALERT and SYS_SHDN Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Temperature Filter Step Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Temperature Filter Impulse Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10-Pin DFN Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10-Pin DFN Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10 Pin DFN PCB Footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
EMC1183-A 10-Pin DFN Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SMSC EMC1183
5
DATASHEET
Revision 1.0 (07-11-13)
5 Page 
Triple Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications
Datasheet
Table 3.2 Electrical Specifications (continued)
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
Standby Supply Current
Temperature Accuracy
Temperature Resolution
Temperature Accuracy
Temperature Resolution
Conversion Time all
Channels
Capacitive Filter
Output Low Voltage
Leakage Current
IDD
tCONV
325 465
µA
890 1050 µA
1120
µA
170 230
µA
Internal Temperature Monitor
±0.25 ±1
°C
±2 °C
0.125
°C
External Temperature Monitor
±0.25 ±1
°C
±0.5
0.125
150
±2
°C
°C
ms
4 conversions / 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
CFILTER
2.2 2.7
nF
Connected across external diode
ALERT / THERM2 and THERM pins
VOL
ILEAK
0.4
V ISINK = 8mA
±5 µA ALERT / THERM2 and THERM
pins
Device powered or unpowered
TA < 85°C
pull-up voltage < 3.6V
SMSC EMC1183
11
DATASHEET
Revision 1.0 (07-11-13)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EMC1183.PDF ] | |
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