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LM32CIMTX Scheda tecnica(PDF) 1 Page - National Semiconductor (TI) |
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LM32CIMTX Scheda tecnica(HTML) 1 Page - National Semiconductor (TI) |
1 / 24 page LM32 Dual Thermal Diode Temperature Sensor with SensorPath™ Bus General Description The LM32 is a digital temperature sensor that measures 3 temperature zones and has a single-wire interface compat- ible with National Semiconductor’s SensorPath bus. Sensor- Path data is pulse width encoded, thereby allowing the LM32 to be easily connected to many general purpose micro- controllers. Several National Semiconductor Super I/O prod- ucts include a fully integrated SensorPath master, that when connected to an LM32 can realize a hardware monitor func- tion that includes limit checking for measured values, au- tonomous fan speed control and many other functions. The LM32 measures the temperature of its own die as well as two external devices such as a processor thermal diode or a diode connected transistor. The LM32 can resolve tem- peratures up to 255˚C and down to -256˚C. The operating temperature range of the LM32 is 0˚C to +125˚C. The ad- dress programming pin allows two LM32s to be placed on one SensorPath bus. Features n SensorPath Interface — 2 hardware programmable addresses n 2 remote diode temperature sensor zones n Internal local temperature zone n 0.5 ˚C resolution n Measures temperatures up to 140 ˚C n 14-lead TSSOP package Key Specifications n Temperature Sensor Accuracy ±3 ˚C (max) n Temperature Range: — LM32 junction 0 ˚C to +85 ˚C — Remote Temp Accuracy 0 ˚C to +100 ˚C n Power Supply Voltage +3.0 V to +3.6 V n Average Power Supply Current 0.5 mA (typ) n Conversion Time (all Channels) 22.5ms to 1456ms Applications n Microprocessor based equipment (Motherboards, Video Cards, Base-stations, Routers, ATMs, Point of Sale, …) n Power Supplies Typical Application 20071101 SensorPath™ is a trademark of National Semiconductor Corporation May 2004 © 2004 National Semiconductor Corporation DS200711 www.national.com |
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