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PDF EMC1053 Data sheet ( Hoja de datos )

Número de pieza EMC1053
Descripción Triple Temperature Sensor
Fabricantes SMSC 
Logotipo SMSC Logotipo



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EMC1053
1°C Triple Temperature
Sensor with Resistance
Error Correction &
Hotter of Two Zones
PRODUCT FEATURES
Datasheet
General Description
The EMC1053 is a System Management Bus (SMBus)
temperature sensor that monitors three temperature
zones, one internal diode and two externally connected
diodes, for PC and embedded environments. The
EMC1053 includes resistance error correction and
ideality factor configuration to eliminate major sources of
temperature measurement error.1
An added feature to the EMC1053 is a function that
automatically compares the two external temperature
zones and reports the hotter of the two temperatures.
Selectable conversion rates and standby mode support
low-power operation. The temperature measurement
ranges support two data ranges (and formats), -64°C to
+127°C and -64°C to +191°C.
Applications
„ Desktop and Notebook Computers
„ Hardware Management
„ Servers
„ Embedded Applications
Features
„ Supports two External Temperature Diodes
±1°C Accuracy (40°C to 80°C)
— 0.125°C Resolution
— Ideality Factor Configuration
— Accepts 2200pF Cap Across External Diodes for Noise
Suppression
— Optional Resistive Error Correction on External Diode 2
— Resistance Error Correction (up to 100 Ohms)
— Selectable Beta Compensation for Substrate Diodes
„ Internal Temperature Diode
±3°C Accuracy (0°C to 85°C)
— 0.125°C Resolution
„ Low Power Operation
— 4uA Standby Current
„ 3.0V to 3.6V Supply
„ Programmable Conversion Rate
„ SMBus 2.0 Compliant
„ Reports Hotter of Two Diodes with Dual-core CPU
1.Patents pending.
Simplified Block Diagram
DP1
DN1
Switching
Current
DP2
DN2
Local Temp
Diode
SMSC EMC1053
11-bit
delta-sigma
ADC
External Diode
1 Register
External Diode
2 Register
Internal Diode
Register
Configuration
Register
Digital Mux
and
Byte Interlock
Status Register
DATASHEET
SMCLK
SMDATA
Revision 1.44 (04-14-08)

1 page




EMC1053 pdf
1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones
Datasheet
List of Tables
Table 1.1 EMC1053 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 2.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2.2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2.3 Write Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 2.4 Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 2.5 Send Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 2.6 Receive Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 3.1 Supply Current vs. Conversion Rate and ADC Averaging Factor . . . . . . . . . . . . . . . . . . . . . . 12
Table 3.2 EMC1053 Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 4.1 EMC1053 Register Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 4.2 Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 4.3 Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 4.4 Conversion Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 4.5 Configuration 2 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 4.6 One Shot Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 4.7 Ideality Configuration Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 4.8 Ideality Factor Look Up Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 4.9 Substrate Diode Ideality Factor Look-Up Table (BJT Model) . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 4.10 Beta Configuration Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 4.11 Beta Configuration Look Up Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 4.12 Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 4.13 Manufacturer ID Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 4.14 Revision Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 6.1 8-Pin MSOP Package Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
SMSC EMC1053
5
DATASHEET
Revision 1.44 (04-14-08)

5 Page





EMC1053 arduino
1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones
Datasheet
Chapter 3 Product Description
The EMC1053 is an SMBus sensor that monitors three temperature zones for use in a personal
computer or embedded environment. The part may be used as a companion to one of SMSC’s broad
line of SIO host devices to perform fan control and thermal management.
A typical system drawing of the EMC1053 is shown in Figure 3.1.
EMC105
DP13
DN1
DP2
DN2
Interna
Dilod
e
SMBu
s
Hos
t
SMBu
Intersface
Figure 3.1 EMC1053 Diode System
3.1
Power Modes
The EMC1053 has two power modes.
„ Run Mode - In this mode, the temperature monitors are active and converting at the programmed
conversion rate. The average power dissipation will depend on the conversion rate. When the
EMC1053 is not actively converting a channel, it goes into a lower power wait state.
„ Standby Mode (power-up default) - in this mode, the EMC1053 is put into a low power state. In the
standby mode, temperature monitoring is disabled. The device will still respond to SMBus
commands.
3.2
One Shot During Standby Mode
The EMC1053 supports a One-Shot command when it is in Standby Mode. Writing to the One-Shot
register will cause the device to power up, perform 1 full set of temperature conversions, then return
to Standby Mode.
3.3
Operation During Run Mode
When the device is active, there are two modes of operation available.
„ Normal Mode (power-up default) - In this mode of operation, the EMC1053 continuously samples
and updates all of its temperature channels.
„ Hotter of Two Mode - In this mode, the EMC1053 continuously samples and then compares the
two remote zones. The hotter of the two remote zones is loaded into the External Diode 2 Data
Registers. In addition, the HOTTER bit in the Status register is set or cleared to indicate which
external diode zone is hotter. If the two remote zones are exactly equal to each other, then the
HOTTER bit is cleared (set to ‘0’), and the results of the two remote zones are stored in their
respective registers.
SMSC EMC1053
11
DATASHEET
Revision 1.44 (04-14-08)

11 Page







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