The LM76 is a digital temperature sensor and thermal window comparator with an I
2C
™ Serial Bus interface with an accuracy of ±1°C. This accuracy for the LM76CHM is specified for a −10°C to 45°C temperature
range. The LM76CHM is specified with an accuracy ±0.5°C at 25°C. The window-comparator architecture of the LM76 eases the
design of temperature control systems conforming to the ACPI (Advanced Configuration and Power Interface) specification for
personal computers. The open-drain Interrupt (INT) output becomes active whenever temperature goes outside a programmable
window, while a separate Critical Temperature Alarm (T_CRIT_A) output becomes active when the temperature exceeds a programmable
critical limit. The INT output can operate in either a comparator or event mode, while the T_CRIT_A output operates in comparator
mode only.
The host can program both the upper and lower limits of the window as well as the critical temperature limit. Programmable
hysterisis as well as a fault queue are available to minimize false tripping. Two pins (A0, A1) are available for address
selection. The sensor powers up with default thresholds of 2°C THYST, 10°C TLOW, 64°C THIGH, and 80°C T_CRIT.
The LM76's 5.0V supply voltage, Serial Bus interface, 12-bit + sign output, and full-scale range of over
127°C make it ideal for a wide range of applications. These include thermal management and protection applications in personal
computers, electronic test equipment, office electronics and bio-medical applications.
The LM76 is a digital temperature sensor and thermal window comparator with an I
2C
™ Serial Bus interface with an accuracy of ±1°C. This accuracy for the LM76CHM is specified for a −10°C to 45°C temperature
range. The LM76CHM is specified with an accuracy ±0.5°C at 25°C. The window-comparator architecture of the LM76 eases the
design of temperature control systems conforming to the ACPI (Advanced Configuration and Power Interface) specification for
personal computers. The open-drain Interrupt (INT) output becomes active whenever temperature goes outside a programmable
window, while a separate Critical Temperature Alarm (T_CRIT_A) output becomes active when the temperature exceeds a programmable
critical limit. The INT output can operate in either a comparator or event mode, while the T_CRIT_A output operates in comparator
mode only.
The host can program both the upper and lower limits of the window as well as the critical temperature limit. Programmable
hysterisis as well as a fault queue are available to minimize false tripping. Two pins (A0, A1) are available for address
selection. The sensor powers up with default thresholds of 2°C THYST, 10°C TLOW, 64°C THIGH, and 80°C T_CRIT.
The LM76's 5.0V supply voltage, Serial Bus interface, 12-bit + sign output, and full-scale range of over
127°C make it ideal for a wide range of applications. These include thermal management and protection applications in personal
computers, electronic test equipment, office electronics and bio-medical applications.