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參數(shù)資料
| 型號(hào)： | ADT14GS-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 溫度/濕度傳感器 |
| 英文描述： | ANALOG TEMP SENSOR-VOLTAGE, 2.49-2.52V, 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | SOIC-16 |
| 文件頁(yè)數(shù)： | 7/16頁(yè) |
| 文件大?。?/td> | 346K |
| 代理商： | ADT14GS-REEL |
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ADT14
–15–
REV. 0
Figure 30 illustrates the system described in the previous para-
graph, where each trip-point output corresponds to a 25% re-
duction in power when tripped. This is accomplished by the
dual rail-to-rail precision OP284 op amp configured as an in-
verting summer in the first stage, and as a V/I converter in the
second stage.
Suppose, however, that the heating element at a reduced power
level is unable to raise the ambient temperature to the desired
setting. This issue can be addressed by using a microcontroller
as shown in Figure 28. The microcontroller allows the time for
the given volume of material to heat up from a low trip-point
temperature to the next highest temperature trip-point to be
measured. If this time is too long, the microcontroller could add
additional power to the heater by altering a setpoint level.
1/2 OP284
10k
10k
10k
10k
2.49k
ADT14
TRIP4 (0%)
TRIP3 (25%)
TRIP2 (50%)
TRIP1 (75%)
2.5VREF
VCC
+5V
HEATING
ELEMENT
Q1
Figure 30. Combination Trip-Point Output
OBSOLETE
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