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參數(shù)資料
| 型號： | LM45BIM3X |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | SOT-23 Precision Centigrade Temperature Sensors |
| 中文描述： | ANALOG TEMP SENSOR-VOLTAGE, -.2-1V, 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | SOT-23, 3 PIN |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 215K |
| 代理商： | LM45BIM3X |
Typical Performance Characteristics
To generate these curves the LM45 was mounted to a printed
circuit board as shown in Figure 3 (Continued)
Applications
The LM45 can be applied easily in the same way as other
integrated-circuit temperature sensors. It can be glued or ce-
mented to a surface and its temperature will be within about
0.2C of the surface temperature.
This presumes that the ambient air temperature is almost the
same as the surface temperature; if the air temperature were
much higher or lower than the surface temperature, the ac-
tual temperature of the LM45 die would be at an intermediate
temperature between the surface temperature and the air
temperature.
To ensure good thermal conductivity the backside of the
LM45 die is directly attached to the GND pin. The lands and
traces to the LM45 will, of course, be part of the printed cir-
cuit board, which is the object whose temperature is being
measured. These printed circuit board lands and traces will
not cause the LM45s temperature to deviate from the de-
sired temperature.
Alternatively, the LM45 can be mounted inside a sealed-end
metal tube, and can then be dipped into a bath or screwed
into a threaded hole in a tank. As with any IC, the LM45 and
accompanying wiring and circuits must be kept insulated and
dry, to avoid leakage and corrosion. This is especially true if
the circuit may operate at cold temperatures where conden-
sation can occur. Printed-circuit coatings and varnishes such
as Humiseal and epoxy paints or dips are often used to in-
sure that moisture cannot corrode the LM45 or its connec-
tions.
Temperature Rise of LM45 Due to Self-Heating
(Thermal Resistance)
SOT-23
no heat sink
*
450C/W
SOT-23
small heat fin
**
Still air
Moving air
260C/W
180C/W
*
Part soldered to 30 gauge wire.
*
*
Heat sink used is
1
2
” square printed circuit board with 2 oz. foil with part at-
tached as shown in Figure 3
Supply Voltage
vs Supply Current
DS011754-33
Start-Up Response
DS011754-34
DS011754-23
FIGURE 3. Printed Circuit Board Used for Heat Sink to Generate All Curves.
1
2
" Square Printed Circuit Board with 2 oz. Foil or Similar
www.national.com
4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM45BIM3X/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM45C | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SOT-23 Precision Centigrade Temperature Sensors |
| LM45CIM3 | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM45CIM3 | 制造商:Texas Instruments 功能描述:PRECISION TEMP SENSOR SMD SOT233 |
| LM45CIM3/NOPB | 功能描述:板上安裝溫度傳感器 PREC CENTIGRADE TEMP SENSOR RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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