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FM20P5X データシート(PDF) 4 Page - Fairchild Semiconductor |
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FM20P5X データシート(HTML) 4 Page - Fairchild Semiconductor |
4 / 9 page FM20 PRODUCT SPECIFICATION 4 REV. 1.0.6 1/9/03 Typical Performance Characteristics Figure 1. Quiescent Current vs. Temperature Figure 2. Accuracy vs. Temperature 6 7 8 9 10 11 12 -50 -25 0 25 50 75 100 125 Temperature ( °C) VDD = +5V -5 -4 -3 -2 -1 0 1 2 3 -50 0 50 100 Temperature ( °C) VDD =+5V lower spec limit upper spec limit Applications Information Mounting The FM20 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 FM20 die will be at an intermediate temperature between the surface temperature and the air temperature. To ensure good thermal conductivity, the backside of the FM20 die is directly attached to the GND pin. The lands and traces to the FM20 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 FM20’s temperature to deviate from the desired temperature. Alternatively, the FM20 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 FM20 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 condensa- tion 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 FM20 or its connections. Loading The FM20 will handle sizable capacitive loads up to 300pF without any special considerations. In an extremely noisy environment it may be advisable to add some filtering to minimize noise in the output voltage. It is also recommended that a 0.1µF bypass capacitor be added between the supply voltage and ground. This is due to the instant current demand caused by switching CMOS transistors. Normally it is un- advisable to put a sufficiently large supply (particularly in portable electronics) to be able to handle the dynamic cur- rents of CMOS transistors. It is a much simpler solution to use a bypass capacitor to sustain the supply voltage during this short demand period. |
同様の部品番号 - FM20P5X |
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同様の説明 - FM20P5X |
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