參數(shù)資料
型號(hào)： LM32
廠商： National Semiconductor Corporation
元件分類(lèi)： 溫度/濕度傳感器
英文描述： Dual Thermal Diode Temperature Sensor with SensorPath Bus
中文描述： 雙熱二極管溫度傳感器SensorPath總線
文件頁(yè)數(shù)： 1/24頁(yè)
文件大小： 340K
代理商： LM32
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 255C and down to -256C. The operating
temperature range of the LM32 is 0C to +125C. 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
n
Temperature Range:
— LM32 junction
— Remote Temp Accuracy
n
Power Supply Voltage
n
Average Power Supply Current
n
Conversion Time (all Channels)
±
3 C (max)
0 C to +85 C
0 C to +100 C
+3.0 V to +3.6 V
0.5 mA (typ)
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
L
2004 National Semiconductor Corporation
DS200711
www.national.com
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