NTC热敏电阻做温度采集

学
机 RT = RN*EXP[B*(1/T-1/TN)]
RT RN
NTC
T(K)
TN (K)
K TN(k)=273.15+TN(
B
B NTC
片 NTC R-T
T TN
(Beta)
B
(
the
steinhart-Hart NTC
单) CWF2-502F3950
/
R-T
德1.2.1
11
NTC
CWF2-502F3950
4.1 5
机 MCU
.................................................................................................... 17
........................................................................................................................................... 18
81
772.43
82
750.44
83
729.17
84
708.6
85
688.7
86
669.44
87
650.8
88
632.76
Sunplus Technology Co., Ltd.
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NTC
89
615.3
习 ........................................................................................................................................... 12 学 DEMO .........................................................................................................................12
31 34 37 40 43 46 49
3980.83 3562.49 3194.1
2869 2581.5 2326.76 2100.6
50
2032
53
1837.4
56
1664.85
德59
1510.74
62
1372.87
65
1249.32
诺68
1138.44
51 54 57 60 63 66 69
1963.92 1777.68 1611.54 1463.08 1330.18 1211.03 1104.04
9997.74 8799
7762.78 6864.7 6084.32 5404.53 4810.9
9 12 15 18 21 24 27
9578.41
10
8436.83
13
7449.16
16
学 65Leabharlann Baidu2.4
19
5847.31
22
5197.72
25
机4630.01
28
9181 8091.73 7150.04 6332.49 5620.89
48600 41519 35563.5 30545.8
-24 -21 -18 -15
46101.6 39418.8
33795 29053.8
-23 -20 -17 -14
料 43744
37435.9 32124.4 27643.3
-13 -10 -7 -4 -1
2 5
26309.5 22724.6 19683.6 17097.1 14891.5 13005.4 11388.2
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NTC
1
1.1
NTC
SPMC75F2413A
8 ADC
料
1.2
资 Positive Temperature Coefficient
PTC
Coefficient
NTC
NTC
习Negative Temperature
资 .......................................................................................................................... 10
.......................................................................................................................... 10 ....................................................................................................................... 10
118 121 124
资287.57 267.21 248.52
习
55 ADC
11
125
学 242.64
250062
机 Vref
片Rv NTC
Vadc
单
C1
Rm
103
德
诺NTC
Rv
Rm
VCC_Ref
NTC
1
............................................................................................................................................. 5
1.1 1.2
90
598.39
91
582.02
92
566.17
93
550.81
94
535.94
95
521.53
96
507.57
97
494.05
98
480.94
99
468.23
100
453.3
101
443.97
102
432.38
103
421.15
104 107 110 113
410.26 379.5 351.4 325.69
http://www.sunplusmcu.com http://mcu.sunplus.com
it502.com/study 专业单片机、计算机资料网 NTC
机学习资料 诺德单片
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片
单
德
诺
Sunplus Technology Co., Ltd.
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V1.1 – Dec. 8, 2005
it502.com/study 专业单片机、计算机资料网 NTC
1.0
2004/01/27
1.1
2005/12/08
料
资
习
学
机
片
单
德
诺
Sunplus Technology Co., Ltd.
-12 -9 -6 -3 0 3 6
25047.9 21655.3 18774.9 16332.9
14230 12438.7 10901.3
-11
23854.2
-8
20642.7
-5
17913.6
资 -2
15588.4
1
13601.9
4
11900.1
习7
10438.3
8 11 14 17 20 23 26
....................................................................................................................... 16 ................................................................................................................................... 17
1.2.1
料 ............................................................................................................................ 5 ......................................................................................................................... 5 ................................................................................................. 5
-39
104261
-38
98621.7
-37
93295.5
-36
88267.4
-35
83521.8
-34
79043.9
-33
74819.2
-32
70833.9
-31
67074.7
-30
63529
-29
60184.6
-28
57030.2
-27
54054.7
-26
51247.9
-25 -22 -19 -16
5000 4456.93
29 32 35 38 41 44 47
4291.28
30
3835.38
33
3434.5
36
片 3081.22
39
2769.24
42
2493.17
45
单2248.38
48
4132.69 3696.03 3311.78 2972.92 2673.47 2408.3 2173.04
诺[-55 ,125 ]
NTC
CWF2-502F3950
[250062 ,242.64 ]
11
() -55 -52 -49 -46 -43
() 250062 213575 181580 153933 130293
() -54 -51 -48 -45 -42
() 237404 202412 171895 145638 123231
() -53 -50 -47 -44 -41
() 225239 191750 162684 137753 116550
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NTC
-40
110232
it502.com/study 专业单片机、计算机资料网
料
资
习
学
机 NTC 片
V1.1 - Dec 8, 2005
单
德
诺
19, Innovation First Road Science Park Hsin-Chu Taiwan 300 R.O.C. Tel: 886-3-578-6005 Fax: 886-3-578-4418 E-mail: mcu@sunplus.com.cn
105 108 111 114
399.69 369.85 342.57 317.62
106 109 112 115
料 389.44
360.48 334.01 309.77
116 119 122 125
1.3
302.16 280.59 260.8 242.64
117 120 123
294.76 273.8 254.58
52 55 58 61 64 67 70
1899.44 1720.2 1560.2 1417.14 1289.02 1174.09 1070.83
71
1038.78
72
1007.82
73
977.93
74
949.06
75
921.17
76
894.22
77
868.18
78
843.02
79
818.69
80
795.17
1.3 1.4 2 2.1 2.2 2.3 3 3.1 3.2 4 MCU
............................................................................................................................ 7 ............................................................................................................................ 8 ........................................................................................................................................... 10