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參數(shù)資料
| 型號： | LM40 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Hardware Monitor with Dual Thermal Diodes and SensorPath Bus |
| 中文描述： | 硬件監(jiān)控雙熱二極管和SensorPath總線 |
| 文件頁數(shù)： | 1/27頁 |
| 文件大?。?/td> | 369K |
| 代理商： | LM40 |
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LM40
Hardware Monitor with Dual Thermal Diodes and
SensorPath
Bus
General Description
The LM40 is a hardware monitor that measures 3 tempera-
ture zones, 5 voltages and has a single-wire interface com-
patible with National Semiconductor’s SensorPath bus. Sen-
sorPath data is pulse width encoded, thereby allowing the
LM40 to be easily connected to many general purpose
micro-controllers. Several National Semiconductor Super I/O
products include a fully integrated SensorPath master, that
when connected to the LM40 can realize a hardware monitor
function that includes limit checking for measured values,
autonomous fan speed control and many other functions.
The LM40 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 LM40 can resolve tem-
peratures up to 255C and down to -256C. The operating
temperature range of the LM40 is 0C to +125C. Using
Σ
ADC it measures +1.2V, +2.5V, +3.3V, +5V and +12V analog
input voltages with internal scaling resistors.The address
programming pin allows two LM40s to be placed on one
SensorPath bus.
Features
n
SensorPath Interface
— 2 hardware programmable addresses
n
Voltage Monitoring
— 9-bit
Σ
ADC
— Internal scaling resistors for all inputs
— Monitors +1.2V, +2.5 V, +3.3 V, +5 V and +12 V
n
Temperature Sensing
— 2 remote diode temperature sensor zones
— Internal local temperature zone
— 0.5 C resolution
— Measures temperatures up to 140 C
n
14-lead TSSOP package
Key Specifications
n
Voltage Measurement Accuracy
n
Temperature Sensor Accuracy
n
Temperature Range:
— LM40 junction
— Remote Temp Accuracy
n
Power Supply Voltage
n
Average Power Supply Current
n
Conversion Time (all Channels)
±
2 % (max)
±
3 C (max)
0 C to +85 C
0 C to +100 C
+3.0 V to +3.6 V
0.5 mA (typ)
29.6ms to 1456ms
Applications
n
Microprocessor based equipment
(Motherboards, Video Cards, Base-stations, Routers,
ATMs, Point of Sale, …)
n
Power Supplies
Typical Application
20068401
SensorPath
is a trademark of National Semiconductor Corporation
May 2004
L
2004 National Semiconductor Corporation
DS200684
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM400 | 制造商:LM TECHNOLOGIES 功能描述:MODULE BLUETOOTH V2.0 CLASS 1 BC04 制造商:LM TECHNOLOGIES 功能描述:BLUETOOTH MODULE, BC04, CLASS 1, EDR 制造商:LM TECHNOLOGIES 功能描述:BLUETOOTH MOD, PDA, GPS, POS, BC04, CLASS 1, EDR; Supply Voltage Min:2.7V; Supply Voltage Max:3.6V; Data Rate:3Mbps; Bluetooth Version:Bluetooth 2.0 + EDR; Bluetooth Class:Class 1; Receive Sensitivity:-88dBm; Type:Bluetooth Module ;RoHS Compliant: Yes |
| LM4001 | 制造商:SEMTECH_ELEC 制造商全稱:SEMTECH ELECTRONICS LTD. 功能描述:SURFACE MOUNT SILICON RECTIFIERS |
| LM4001G | 制造商:SEMTECH_ELEC 制造商全稱:SEMTECH ELECTRONICS LTD. 功能描述:SURFACE MOUNT GLASS PASSIVATED SILICON RECTIFIERS |
| LM4002 | 制造商:SEMTECH_ELEC 制造商全稱:SEMTECH ELECTRONICS LTD. 功能描述:SURFACE MOUNT SILICON RECTIFIERS |
| LM4002G | 制造商:SEMTECH_ELEC 制造商全稱:SEMTECH ELECTRONICS LTD. 功能描述:SURFACE MOUNT GLASS PASSIVATED SILICON RECTIFIERS |
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