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Dual Output Low Power Thermostat
The LM56 is a precision low power thermostat. Two stable temperature trip points (VT1 and VT2) are generated by dividing down the LM56 1.250V bandgap voltage reference using 3 external resistors. The LM56 has two digital outputs. OUT1 goes LOW when the temperature exceeds T1 and goes HIGH when the the temperature goes below (T1-THYST). Similarly, OUT2 goes LOW when the temperature exceeds T2 and goes HIGH when the temperature goes below (T2-THYST). THYST is an internally set 5°C typical hysteresis.
http://www.national.com/pf/LM/LM56.html -
SOT-23, ±3°C Accurate, 120°C-150°C Factory Preset Thermostat
The LM27 is a precision, single digital-output, low-power thermostat comprised of an DAC, internal reference, temperature sensor and comparator. Utilizing factory programming, it can be manufactured with different trip points as well as different digital output functionality.
http://www.national.com/pf/LM/LM27.html -
1.6V, LLP-6 Factory Preset Temperature Switch and Temperature Sensor
The LM26LV is a low-voltage, precision, dual-output, low-power temperature switch and temperature sensor. The temperature trip point can be preset at the factory to any temperature in the range of 0°C to 150°C in 1°C increments. Built-in temperature hysteresis keeps the output stable in an environment of temperature instability.
http://www.national.com/pf/LM/LM26LV.html -
Tiny Temperature Sensors for Portable Systems
This brief will discuss trade-offs in accuracy, as well as how to choose between thermistors and analog output IC temperature sensors.
http://www.national.com/an/AN/AN-1256.pdf -
LM26 - SOT-23, ±3°C Accurate, Factory Preset Thermostat
The LM26 is a precision, single digital-output, low-power thermostat comprised of an internal reference, temperature sensor, DAC and comparator. Utilizing factory programming, it can be manufactured with different trip points as well as different digital output functionality.
http://www.national.com/pf/LM/LM26.html
