DIA1412

Version 1.0, Jul 2024

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© 2024 DIOO MICROCIRCUITS CO., LTD.

24

2h

0

0

1

0

0.17

3h

0

0

1

1

0.25

4h

0

1

0

0

0.5

5h

0

1

0

1

1

6h

0

1

1

0

2

7h

0

1

1

1

NPN

8h - Fh

1

X

X

X

Auto-detection

12.13. External channel ideality factor registers

These registers are used to configure the ideality factor for the each external BJTs.

Addr. Type

Register

B7

B6

B5

B4

B3

B2

B1

B0

Default

27h

R/W

External channel

ideality factor

Reserved

IDEALITY [5:0]

12h

Note: R = Read. W = Write.

The temperature measurement accuracy for external BJT is affected by the ideality factor of BJT. Different BTJ

behaves different ideality factor. The user can program the ideality factor for the external channel to obtain the

best temperature measurement accuracy.

BJT ideality factor settings

Setting

Factor

Setting

Factor

Setting

Factor

08h

0.9869

18h

1.0079

28h

1.0291

09h

0.9882

19h

1.0092

29h

1.0304

0Ah

0.9895

1Ah

1.0105

2Ah

1.0317

0Bh

0.9908

1Bh

1.012

2Bh

1.033

0Ch

0.9921

1Ch

1.0132

2Ch

1.0343

0Dh

0.9934

1Dh

1.0146

2Dh

1.0356

0Eh

0.9947

1Eh

1.0159

2Eh

1.0369

0Fh

0.996

1Fh

1.0173

2Fh

1.0382

10h

0.9973

20h

1.0187

30h

1.0395

11h

0.9986

21h

1.02

31h

1.0408

12h

1

22h

1.0213

32h

1.0421

13h

1.0013

23h

1.0226

33h

1.0434

14h

1.0026

24h

1.0239

34h

1.0447

15h

1.0039

25h

1.0252

35h

1.046

16h

1.0053

26h

1.0265

36h

1.0473