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PDF EMC1002 Data sheet ( Hoja de datos )
| Número de pieza | EMC1002 | |
| Descripción | Dual SmBus Sensor | |
| Fabricantes | SMSC | |
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EMC1002
1°C Dual SMBus Sensor
with Resistance Error
Correction
PRODUCT FEATURES
Datasheet
General Description
The EMC1002 is an SMBus temperature sensor that
monitors up to two temperature zones and can generate
two system interrupts. With ±1°C measurement
accuracy, the EMC1002 provides a low-cost solution for
critical temperature monitoring applications. Extended
features include automatic resistance error correction
and programmable ideality factor configuration
eliminating both major sources of temperature
measurement error.1 The 11-bit sigma delta
temperature-to-digital converter provides superb
linearity, excellent noise immunity and repeatable
temperature readings.
The EMC1002 generates two separate interrupts with
programmable thermal trip points. The THERM output
operates as a thermostat with programmable threshold
and hysteresis. The ALERT output can be configured
as a maskable SMBus alert with programmable
window comparator limits, or a second THERM output.
The EMC1002 is pin compatible with the ADT7461,
ADM1032, LM99, and the MAX6649.
1.Patents pending.
Features
Resistance Error Correction
Ideality Factor Configuration
Select 1 of 4 SMBus addresses with external resistor
Remote Thermal Zones
— ±1°C Accuracy (40°C to 80°C)
— 0.125°C resolution
Internal Thermal Zone
— ±3°C Accuracy (0°C to 85°C)
Maskable Interrupt using ALERT
One-shot Command during standby
Programmable temperature conversion rate
Extended temperature (-64°C to 191°C) available
Over-limit filtering with consecutive counter
Small 8-pin MSOP lead-free RoHS Compliant
package
Applications
Desktop and Notebook Computers
Smart batteries
Industrial/Automotive
Other Electronic Systems
Simplified Block Diagram
Switching
Current
DP
DN
Internal
Temp Diode
SMSC EMC1002
EMC1002
11-bit
delta-sigma
ADC
Remote Temp
Register
Internal Temp
Register
Status Register
Address Pointer Register
Conversion Rate Register
High Limit Registers
Low Limit Registers
THERM Limit Register
THERM Hysteresis Register
Configuration Register
Interrupt Masking
DATASHEET
SMCLK
SMDATA
ALERT
THERM
Revision 1.4 (12-18-07)
1 page  
1°C Dual SMBus Sensor with Resistance Error Correction
Datasheet
Chapter 2 Electrical Characteristics
Table 2.1 Electrical Characteristics
VDD=3.0V to 3.6V, TA= -40°C to +125°C, Typical values at TA = 27°C unless otherwise noted
PARAMETER
SYMBOL MIN TYP MAX UNITS
CONDITIONS
DC Power
Supply Voltage
Average Operating Current
Internal Temperature Monitor
Temperature Accuracy
VDD 3.0 3.3 3.6 V
IDD
47 50
μA 0.0625 conversions/s
See Table 4.6,
“Conversion Rates,”
on page 15
IPD
4.8 10
μA Standby mode
±1
TBD
±3
°C 0°C≤TA≤85°C
°C -40°C≤TA≤125°C
Temperature Resolution
External Temperature Monitor
Temperature Accuracy
Remote Diode 40°C to 80°C
Remote Diode 0°C to 125°C
Temperature Resolution
Voltage Tolerance
Voltage at pin (ADDR/THERM, )
Voltage at pin (ALERT/THERM2,
SMDATA,SMCLK)
VTOL
VTOL
Digital Outputs (ADDR/THERM, ALERT/THERM2)
Output Low Voltage
High Level Leakage Current
SMBus Interface (SMDATA,SMCLK)
VOL
IOH
Input High Level
Input Low Level
Input High/Low Current
Hysteresis
VIH
VIL
IIH/IIL
Input Capacitance
Output Low Sink Current
SMBus Timing
Clock Frequency
FSMB
0.5 °C
0.125
±1
±3
°C 15°C≤TA≤70°C
°C -40°C≤TA≤125°C
°C
-0.3 3.6 V
-0.3 5.5 V
0.4
0.1 1
V IOUT=-4mA
μA VOUT=VDD
2.0
0.8
-1 1
500
5
6
V
V
μA
mV
pF
mA SMDATA = 0.6V
10 400 kHz
SMSC EMC1002
5
DATASHEET
Revision 1.4 (12-18-07)
5 Page 
1°C Dual SMBus Sensor with Resistance Error Correction
Datasheet
ACTUAL TEMP.
(°C)
-63
Table 4.1 Temperature Data Format
DEFAULT RANGE
BINARY
0000 0000 000 Note 4.1
EXTENDED RANGE
OFFSET BINARY
0000 0001 000 Note 4.2
-0.125
0
+0.125
+0.250
0000 0000 000 Note 4.1
0000 0000 000 Note 4.1
0000 0000 001
0000 0000 010
0011 1111 111
0100 0000 000
0100 0000 001
0100 0000 010
+1 0000 0001 000
0100 0001 000
+127
+128
0111 1111 000 Note 4.3
0111 1111 000 Note 4.3
1011 1110 000
1011 1111 000
+190
+191
0111 1111 000 Note 4.3
0111 1111 000 Note 4.3
1111 1110 000
1111 1111 000 Note 4.4
Note 4.1 Data in Binary Format reads 0000 0000 000 for all temperatures ≤ 0.00°C.
Note 4.2 Data in Offset Binary Format reads 0000 0000 000 for all temperatures ≤ -64°C.
Note 4.3 Data in Binary Format reads 0111 1111 000 for all temperatures ≥ +127°C.
Note 4.4 Data in Offset Binary Format reads 1111 1111 000 for all temperatures ≥ +191°C.
The 11-bit temperature data is stored with the 8 most significant bits stored in the High Byte register
and the 3 least significant bits in the Low Byte register. The Low Byte register contains the three least
significant bits as outlined in Table 4.2. These bits are stored in the upper three bits of the register,
and the five LSB positions of this register always read zero. In Table 4.2, the upper case “B” shows
the bit position of a 16-bit word created by concatenating the High Byte and Low Byte, and the lower
case “b” shows the bit position in the 11-bit temperature data. The resolution of the internal temperature
is 0.5°C and the b1 and b0 bits of the Internal Temperature Value Low Byte register will always read 0.
Table 4.2 Bit Position of Two Byte Values
HIGH BYTE
LOW BYTE
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 0 0 0 0 0
4.5
ALERT/THERM2 Output
The ALERT/THERM2 output asserts if an out of limit measurement is detected as described in 4.12,
"Limit Registers," on page 16. The ALERT/THERM2 pin is an open drain output and requires a pull-up
resistor to VDD.The ALERT/THERM2 pin can be used as an SMBALERT#, or may be configured as a
second THERM output.
As described in the SMBus specification, an SMBus slave may inform the SMBus master that it wants
to talk by asserting the SMBALERT# signal. One or more ALERT outputs can be hardwired together
as a wired-or bus to a common input.
SMSC EMC1002
11
DATASHEET
Revision 1.4 (12-18-07)
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet EMC1002.PDF ] | |
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