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PDF EMC1073 Data sheet ( Hoja de datos )
| Número de pieza | EMC1073 | |
| Descripción | Multiple Channel Temperature Sensors | |
| Fabricantes | SMSC | |
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EMC1073 / EMC1074
Multiple Channel 1°C
Temperature Sensors with
Selectable Address
PRODUCT FEATURES
Datasheet
General Description
The EMC1073 and EMC1074 are high accuracy, low
cost, System Management Bus (SMBus) temperature
sensors with pin selectable SMBus addresses.
Each device provides ±1° accuracy (max) for external
diode temperatures and ±2°C accuracy (max) for the
internal diode temperature. The EMC1073 monitors
three temperature channels (two external and one
internal). The EMC1074 monitors four temperature
channels (three external and one internal).
Applications
Notebook Computers
Desktop Computers
Industrial
Embedded applications
Features
External Temperature Monitors
— ±0.25°C typ accuracy (20°C < TDIODE < 110°C)
— 0.125°C resolution
— Supports 2N3904 and AMD diodes
— Anti-parallel diodes for extra diode support (EMC1074)
Internal Temperature Monitor
— ±0.25°C typ accuracy (-5°C < TA < 100°C)
3.3V Supply Voltage
SMBus 2.0 Compliant
— Programmable SMBus address
Programmable Temperature Limits for ALERT and
THERM
Available in Small 10-pin MSOP Lead-free RoHS
Compliant Package
Block Diagram
VDD
DP1
DN1
DP2 / DN3*
Anti-parallel
Diode
DN2 / DP3*
EMC1073 / EMC1074
Switching
Current
Analog
Mux
ΔΣ ADC
Internal Temp
Diode
External Temperature
Register(s)
Internal
Temperature Register
Status Registers
* DN3 and DP3 are EMC1074 only
GND
Conversion Rate Register
Low Limit Registers
High Limit Registers
THERM Limit Register
THERM Hysteresis Register
SMCLK
SMDATA
Configuration Register
Interupt Masking
ALERT
SMBus Address Decode
THERM/ADDR
SMSC EMC1073 / EMC1074
DATASHEET
Revision 1.39 (10-11-10)
1 page  
Multiple Channel 1°C Temperature Sensors with Selectable Address
Datasheet
List of Figures
Figure 2.1
Figure 4.1
Figure 5.1
Figure 5.2
Figure 5.3
Figure 5.4
Figure 5.5
Figure 5.6
Figure 5.7
Figure 8.1
Figure 8.2
Figure 8.3
EMC1073/EMC1074 Pin Diagram, MSOP-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SMBus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
System Diagram for EMC1073 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
System Diagram for EMC1074 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Isolating THERM Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Temperature Filter Step Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Temperature Filter Impulse Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
EMC1073 Diode Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
EMC1074 Diode Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10-Pin MSOP / TSSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
EMC1073 Package Markings - 10-Pin MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
EMC1074 Package Markings - 10-Pin MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SMSC EMC1073 / EMC1074
5
DATASHEET
Revision 1.39 (10-11-10)
5 Page 
Multiple Channel 1°C Temperature Sensors with Selectable Address
Datasheet
3.2 Electrical Specifications
Table 3.2 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
uA
930 1200 uA
1120
uA
170 230
uA
Power Up Time
Time to first data
available
tPUP
tCONV_1
Temperature Accuracy
Temperature Resolution
Temperature Accuracy
10 15
ms
300 ms
Internal Temperature Monitor
±0.25 ±1
°C
±2 °C
0.125
°C
External Temperature Monitor
±0.25 ±1
°C
Temperature Resolution
Capacitive Filter
tCONV
tCONV
CFILTER
Output Low Voltage
Leakage Current
VOL
ILEAK
±0.5 ±2
°C
0.125
°C
190 ms
150 ms
2.2 2.5
nF
ALERT and THERM pins
0.4 V
±5 uA
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.
Temp selection read
Note 3.2
-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
EMC1073, default settings
EMC1074, default settings
Connected across external diode
ISINK = 8mA
ALERT and THERM pins
Device powered or unpowered
TA < 85°C
pull-up voltage < 3.6V
Note 3.2 The ALERT and THERM pins will not glitch low upon power up.
SMSC EMC1073 / EMC1074
11
DATASHEET
Revision 1.39 (10-11-10)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EMC1073.PDF ] | |
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