EMC1403 Datasheet, PDF (40/55 Pages) SMSC Corporation – 1°C Temperature Sensor with Beta Compensation

1°C Temperature Sensor with Beta Compensation
Data Sheet
automatically correct for most diode ideality errors, therefore it is not recommended that these settings
be updated without consulting Microchip.
SETTING
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
Table 6.18 Ideality Factor Look-Up Table (Diode Model)
FACTOR
0.9949
0.9962
0.9975
0.9988
1.0001
1.0014
1.0027
1.0040
1.0053
1.0066
1.0080
1.0093
1.0106
1.0119
1.0133
1.0146
SETTING
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
20h
21h
22h
23h
24h
25h
26h
27h
FACTOR
1.0159
1.0172
1.0185
1.0200
1.0212
1.0226
1.0239
1.0253
1.0267
1.0280
1.0293
1.0306
1.0319
1.0332
1.0345
1.0358
SETTING
28h
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
FACTOR
1.0371
1.0384
1.0397
1.0410
1.0423
1.0436
1.0449
1.0462
1.0475
1.0488
1.0501
1.0514
1.0527
1.0540
1.0553
1.0566
For CPU substrate transistors that require the BJT transistor model, the ideality factor behaves slightly
differently than for discrete diode-connected transistors. Refer to Table 6.19 when using a CPU
substrate transistor.
Table 6.19 Substrate Diode Ideality Factor Look-Up Table (BJT Model)
SETTING
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
FACTOR
0.9869
0.9882
0.9895
0.9908
0.9921
0.9934
0.9947
0.9960
0.9973
SETTING
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
20h
FACTOR
1.0079
1.0092
1.0105
1.0120
1.0132
1.0146
1.0159
1.0173
1.0187
SETTING
28h
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
FACTOR
1.0291
1.0304
1.0317
1.0330
1.0343
1.0356
1.0369
1.0382
1.0395
DS20005272A-page 40
 2014 Microchip Technology Inc.