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LM32CIMTX Scheda tecnica(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte LM32CIMTX
Spiegazioni elettronici  Dual Thermal Diode Temperature Sensor with SensorPath Bus
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM32CIMTX Scheda tecnica(HTML) 1 Page - National Semiconductor (TI)

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LM32
Dual Thermal Diode Temperature Sensor with
SensorPathBus
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
SensorPathis a trademark of National Semiconductor Corporation
May 2004
© 2004 National Semiconductor Corporation
DS200711
www.national.com


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