DocID024452 Rev 1

15/24

SEA01

Online digital trimming procedure

doesn’t change) and the internal parity fail flag is activated. If the parity fail flag was

activated from the previous communication, the command is not executed even if the parity

check is ok. To reset the parity fail flag the user has to perform a read command.

resulting in a direct change from the old to the new value.

0

001011

1

36.6

41

0

001100

0

40

42

0

001101

1

43.3

43

0

001110

1

46.6

44

0

001111

0

50

45

0

010000

1

0

30

0

010001

0

-3.3

29

0

010010

0

-6.6

28

0

010011

1

-10

27

0

010100

0

-13.3

26

0

010101

1

-16.6

25

0

010110

1

-20

24

0

010111

0

-23.3

23

0

011000

0

-26.6

22

0

011001

1

-30

21

0

011010

1

-33.3

20

0

011011

0

-36.6

19

0

011100

1

-40

18

0

011101

0

-43.3

17

0

011110

0

-46.6

16

0

011111

1

-50

15

1. The device is initialized with the default value of 0000000 (i.e. 0% trim value of VrefI). If the device has already been burned

once, the default value is the one stored in the first OTP memory.

2. The 0% trim value was assumed 30 mV as an example but this value can be in the range [27 mV, 33 mV]. The trimming

range is proportional to the trimming value [-50% + 50%] with a trimming step of 3.3% referenced to the 0% trim value.

Data bits

Trim step [%]

0

000000

MSB

LSB

D1

D2

D3

D4

D5

D6

D7

D8 (pck)