Dual Output Internally Preset Thermostat
OBSOLETE
LM66
www.ti.com
SNOS402D – APRIL 2000 – REVISED APRIL 2013
LM66 Dual Output Internally Preset Thermostat
Ch...
Description
OBSOLETE
LM66
www.ti.com
SNOS402D – APRIL 2000 – REVISED APRIL 2013
LM66 Dual Output Internally Preset Thermostat
Check for Samples: LM66
FEATURES
1
2 Digital Outputs Support TTL Logic Levels Internal Temperature Sensor 2 Internal Comparators with Hysteresis Internal Voltage Reference Currently Available in 8-pin SOIC Plastic
Package
KEY SPECIFICATIONS
Power Supply Voltage: 2.7V to 10V Power Supply Current: 250 μA (max) VREF 1.250V: ±1.4% (max) Hysteresis Temperature: 5°C Internal Temperature Sensor Output Voltage:
(+6.20 mV/°C x T) +400mV Temperature Trip Point Accuracy: ±3°C (max) T1 Set Point: +73°C T2 Set Point :+82°C
APPLICATIONS
Microprocessor Thermal Management
Appliances
Portable Battery Powered 3.0V or 5V Systems
Fan Control
Industrial Process Control
HVAC Systems
Remote Temperature Sensing
Electronic System Protection
DESCRIPTION
The LM66 is a precision low power thermostat. Two stable temperature trip points (VT1 and VT2) are generated by dividing down the LM66 1.250V bandgap voltage reference using a resistors divider network. The LM66 has two digital outputs. OUT1 goes LOW when the temperature exceeds T1 and goes HIGH when 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.
The LM66 is currently available in an 8-lead small outline package.
Simplified Block Diagram ...
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