AT25DF161-SH ATMEL [ATMEL Corporation], AT25DF161-SH Datasheet - Page 12

• Manufacturer Part Number: AT25DF161-SH
• Description: 8-bit Atmel Microcontrollers
• Manufacturer: ATMEL [ATMEL Corporation]

5.7 Analog I/O
5.7.1 Temperature sensor
12
Atmel AVR1923
The temperature sensor circuitry consists of a serial connection of a normal and a
NTC resistor. The NTC sensor is from Murata and some part details are shown in
Table
Table 5-7. NTC characteristics.
Table 5-8
available from Murata in the datasheet of the NTC.
Table 5-8. Resistance vs. temperature (from Murata).
Temp.
Global part number
Resistance (25℃)
B-Constant (25/50℃) (reference value)
B-Constant (25/80℃) (reference value)
B-Constant (25/85℃) (reference value)
B-Constant (25/100℃) (reference value)
[°C]
-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
5-7, more information can be obtained from the manufacturer’s website.
resistance
shows the temperature vs. resistance characteristic. The values are
2197.225
2055.558
1923.932
1801.573
1687.773
1581.881
1483.100
1391.113
1305.413
1225.531
1151.037
1081.535
1016.661
NTC
[kΩ]
956.080
899.481
846.579
797.111
750.834
707.524
666.972
628.988
593.342
559.931
Temp.
[°C]
10
11
12
13
14
15
16
17
18
19
20
21
22
0
1
2
3
4
5
6
7
8
9
resistance
NTC
[kΩ]
357.012
338.006
320.122
303.287
287.434
272.500
258.426
245.160
232.649
220.847
209.710
199.196
189.268
179.890
171.028
162.651
154.726
147.232
140.142
133.432
127.080
121.066
115.368
NCP18WF104J03RB
100kΩ ±5%
4250K ±2%
4303K
4311K
4334K
Temp.
[°C]
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
resistance
NTC
[kΩ]
79.222
75.675
72.306
69.104
66.061
63.167
60.415
57.797
55.306
52.934
50.677
48.528
46.482
44.533
42.675
40.904
39.213
37.601
36.063
34.595
33.195
31.859
30.584
Temp.
[°C]
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
8394B-AVR-02/12
resistance
NTC
[kΩ]
22.224
21.374
20.561
19.782
19.036
18.323
17.640
16.986
16.360
15.760
15.184
14.631
14.101
13.592
13.104
12.635
12.187
11.757
11.344
10.947
10.566
10.200
9.848