EMC1033_07 Datasheet, PDF (1/25 Pages) SMSC Corporation – 1°C Triple SMBus Sensor with Resistance Error Correction

EMC1033
1°C Triple SMBus
Sensor with Resistance
Error Correction
PRODUCT FEATURES
Datasheet
General Description
The EMC1033 is an SMBus temperature sensor that
monitors up to three temperature zones and can
generate two system interrupts. With ±1°C measurement
accuracy, the EMC1033 provides a low-cost solution for
critical temperature monitoring applications. Features
include automatic resistance error correction and
programmable ideality factor configuration eliminating
both major sources of temperature measurement error.¹
The EMC1033 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 as a second THERM
output. Both interrupts are maintained in an 8-pin
package while a third temperature zone is added with
the anti-parallel diode technique. This allows the
EMC1033 to be pin compatible with the ADT7461,
ADM1032, LM99, and the MAX6649 with the advantage
of a third temperature zone.
1.Patents pending.
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
„ Internal Thermal Zone
— ±3.0°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 SOIC or TSSOP lead-free RoHS
compliant package
Applications
„ Desktop and Notebook Computers
„ Thermostats
„ Smart batteries
„ Industrial/Automotive
Simplified Block Diagram
EMC1033
DP1
DN2
DN1
DP2
Switching
Current
Internal
Temp Diode
11-bit
delta-sigma
ADC
Remote Temp
Register 1
Remote Temp
Register 2
Internal Temp
Register
Status Register
Address Pointer Register
Conversion Rate Register
High Limit Registers
Low Limit Registers
THERM Limit Register
THERM Hysterisis Register
Configuration Register
Interrupt Masking
SMCLK
SMDATA
ALERT
THERM
SMSC EMC1033
DATASHEET
Revision 1.1 (01-19-07)