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參數(shù)資料
| 型號(hào)： | FM50S3X_NL |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Analog Temperature Sensor |
| 中文描述： | 模擬溫度傳感器 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大小： | 50K |
| 代理商： | FM50S3X_NL |
PRODUCT SPECIFICATION
FM50
REV. 1.1.0 10/5/04
5
Applications Information
Although the FM50 is a simple device, care must be taken to
ensure that temperature is measured accurately. There are
two major sources of errors:
3.
Voltage errors.
4.
Thermal Delay Errors.
5.
Location errors
Voltage Errors
Figure 4. Recommended Electrical Connections
A Kelvin connection is recommended to avoid errors due to
voltage drops in the ground connections. Although the
typical 130μA supply current draw of the FM50 will only
cause a 130μV error if the series resistance is 1
current supply to adjacent circuits can cause a 10mV drop
across 100m
(10m
is a typical value for soldered joints or
contact resistance), leading to a 1°C error. For this reason,
the FM50 should be Kelvin connected as shown in Figure 4.
, a 100 mA
Thermal Delay Errors
For measurement accuracy of the order of tenths of 1°C,
adequate settling time must be allowed. For a typical circuit
board installation, 15 minutes should be allowed to elapse
following reading of temperature within 1 - 2°C of the
expected final value. Once V
OUT
is stable (with or without about ±0.1°C noise) for about 5
minutes, temperature can be calculated.
has ceased to slew and
Location Errors
Position is another source of error. Even within a controlled
thermal environment, changing location by a few inches can
lead to errors of several tenths of 1°C
Mounting
The FM50 can be easily mounted by gluing or cementing it
to a surface. In this case, its temperature will be within about
0.2°C of the temperature of the surface it is attached to if the
ambient air temperature is almost the same as the surface
temperature. If the air temperature is much higher or lower
than the surface temperature, the actual temperature of the
FM50 die will be at an intermediate temperature between the
surface temperature and the air temperature.
To ensure good thermal conductivity, the backside of the
FM50 die is directly attached to the GND pin. The lands and
traces to the FM50 will, of course, be part of the printed
circuit board, which is the object whose temperature is being
measured. These printed circuit board lands and traces will
not cause the FM50’s temperature to deviate from the
desired temperature.
Alternatively, the FM50 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 FM50 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 paint or dips can be used to ensure
that moisture cannot corrode the FM50 or its connections.
FM50
VDD
VOUT
GND(power)
GND(sense)
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| FM50 | Analog Temperature Sensor |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FM51 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low Voltage High Drive Temperature Sensor |
| FM510 | 制造商:Black Box Corporation 功能描述:GIGASTATION + BLANK .5 U HIGH BLACK 5 PAK |
| FM5100 | 制造商:RECTRON 制造商全稱:Rectron Semiconductor 功能描述:SURFACE MOUNT SCHOTTKY BARRIER RECTIFIER VOLTAGE RANGE 20 to 200 Volts CURRENT 5.0 Ampere |
| FM5100-B | 制造商:FORMOSA 制造商全稱:Formosa MS 功能描述:Chip Schottky Barrier Diodes - Silicon epitaxial planer type |
| FM5100L | 制造商:RECTRON 制造商全稱:Rectron Semiconductor 功能描述:SURFACE MOUNT SCHOTTKY BARRIER RECTIFIER VOLTAGE RANGE 20 to 200 Volts CURRENT 5.0 Ampere |
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