參數(shù)資料
型號(hào): LM94021BIMG
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 溫度/濕度傳感器
英文描述: Multi-Gain Analog Temperature Sensor
中文描述: ANALOG TEMP SENSOR-VOLTAGE, 1.36V, 2.70Cel, RECTANGULAR, SURFACE MOUNT
封裝: SC-70, 5 PIN
文件頁(yè)數(shù): 9/13頁(yè)
文件大?。?/td> 683K
代理商: LM94021BIMG
1.0 LM94021 Transfer Function
(Continued)
LM94021 Transfer Table
(Continued)
The output voltages in this table apply for V
DD
= 5V.
Temperature
(C)
(mV)
130
302
131
296
132
291
133
285
134
279
135
273
136
267
137
261
138
255
139
249
140
243
141
237
142
231
143
225
144
219
145
213
146
207
147
201
148
195
149
189
150
183
GS = 00
GS = 01
(mV)
478
469
460
452
443
434
425
416
408
399
390
381
372
363
354
346
337
328
319
310
301
GS = 10
(mV)
653
642
630
618
607
595
584
572
560
549
537
525
514
502
490
479
467
455
443
432
420
GS = 11
(mV)
829
814
800
786
771
757
742
728
713
699
684
670
655
640
626
611
597
582
568
553
538
Although the LM94021 is very linear, its response does have
a slight downward parabolic shape. This shape is very ac-
curately reflected in the LM94021 Transfer Table. For a
linear approximation, a line can easily be calculated over the
desired temperature range from the Table using the two-
point equation:
Where V is in mV, T is in C, T
1
and V
1
are the coordinates
of the lowest temperature, T
2
and V
2
are the coordinates of
the highest temperature.
For example, if we want to determine the equation of a line
with the Gain Setting at GS1 = 0 and GS0 = 0, over a
temperature range of 20C to 50C, we would proceed as
follows:
Using this method of linear approximation, the transfer func-
tion can be approximated for one or more temperature
ranges of interest.
L
www.national.com
9
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