EMC1002
1°C Dual SMBus Sensor
with Resistance Error
Correction
PRODUCT FEATURES
General Description
The EMC1002 is an SMBus temperature sensor that
monitors up to two 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.
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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.
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Datasheet
Features
Resistance Error Correction
Ideality Factor Configuration
Select 1 of 4 SMBus addresses with external resistor
Remote Thermal Zones
—
±1.0°C
Accuracy (40°C to 80°C)
— 0.125°C resolution
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Internal Thermal Zone
—
±3.0°C
Accuracy (40°C to 100°C)
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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-lead SOIC or MSOP package
Applications
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Desktop and Notebook Computers
Smart batteries
Industrial/Automotive
Other Electronic Systems
Simplified Block Diagram
EMC1002
Address Pointer Register
Switching
Current
DP1
Analog Mux
Digital Mux
Conversion Rate Register
Limit Comparator
High Limit Registers
Digital Mux
DN1
11-bit
delta-sigma
ADC
Remote Temp
Register
Internal Temp
Register
Low Limit Registers
THERM Limit Register
THERM Hysteresis Register
Configuration Register
Internal
Temp Diode
SMBus Interface
SMCLK
SMDATA
ALERT
THERM
Status Register
Interrupt Masking
SMSC EMC1002
PRELIMINARY DATASHEET
Revision 1.1 (12-02-04)
SMSC [ SMSC CORPORATION ]
