AT25DF161-SH ATMEL [ATMEL Corporation], AT25DF161-SH Datasheet - Page 13

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

8394B-AVR-02/12
Two common approximations can be used to model the temperature vs. resistance
characteristic; these are the B parameter and the Steinhart-Hart equations.
Coefficients for both formulas can be calculated from
When the internal reference VCC/1.6 is used and the ADC is measuring in signed
single ended mode the codes in
temperatures. The calculation is based on
Table 5-9. ADC codes vs. temperature (signed single ended mode with internal
VCC/1.6 reference).
ADC input [V] Temp. [°C]
Temp.
[°C]
-7
-6
-5
-4
-3
-2
-1
2.076
2.030
1.983
1.936
1.889
1.841
1.794
1.747
1.700
1.653
1.606
1.560
1.514
1.469
1.425
1.380
1.337
1.294
1.252
1.211
1.171
1.131
1.093
resistance
NTC
[kΩ]
528.602
499.212
471.632
445.772
421.480
398.652
377.193
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
Temp.
[°C]
23
24
25
26
27
28
29
ADC codes
resistance
Table 5-9
NTC
[kΩ]
109.970
104.852
100.000
95.398
91.032
86.889
82.956
2047
2014
1968
1921
1875
1828
1781
1734
1687
1640
1594
1548
1503
1458
1414
1370
1327
1285
1243
1202
1162
1123
1084
Table
ADC input [V]
can be read from the ADC at the various
Temp.
[°C]
53
54
55
56
57
58
59
5-8.
0.347
0.334
0.321
0.309
0.297
0.286
0.275
0.264
0.254
0.244
0.235
0.226
0.218
0.209
0.202
0.194
0.187
0.180
0.173
0.167
0.161
0.155
0.149
resistance
Table
Atmel AVR1923
NTC
[kΩ]
29.366
28.203
27.091
26.028
25.013
24.042
23.113
Temp. [°C]
5-8.
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
Temp.
[°C]
83
84
85
86
87
88
89
ADC codes
resistance
NTC
[kΩ]
9.510
9.185
8.873
8.572
8.283
8.006
7.738
345
332
319
307
295
283
273
262
252
243
233
225
216
208
200
193
185
178
172
165
159
154
148
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