• Configuration register (Table 3)

• 12-bit calibration coefficients for the Offset and FSO

DACs

• 12-bit compensation coefficients for the Offset TC

and FSOTC DACs

• Two general-purpose registers available to the user

for storing process information such as serial num-

ber, batch date, and check sums

Program the EEPROM one bit at a time. The bits have

addresses from 0 to 127 (7F hex).

Configuration Register

The configuration register (Table 3) determines the

PGA gain, the polarity of the offset and offset TC coeffi-

cients, and the coarse offset correction (IRO DAC). It

DAC Registers

The Offset, Offset TC, FSO, and FSOTC registers store

the coefficients used by their respective calibration/

compensation DACs.

1%-Accurate, Digitally Trimmed

Sensor Signal Conditioner

8

_______________________________________________________________________________________

Table 4. EEPROM Memory Map

EE Address

Contents

EE Address

Contents

EE Address

Contents

EE Address

Contents

EE Address

Contents

Reserved*

EE Address

Contents

EE Address

Contents

0E

0

0C

0

0F

0D

0

0A

08

0B

09

06

04

07

05

02

1

00

Configuration

03

01

1E

0

1C

1

1F

1D

0

1A

18

1B

19

16

14

17

15

12

1

10

MSB

Offset

LSB

13

11

2E

0

2C

0

2F

2D

1

2A

28

2B

29

26

24

27

25

22

1

20

MSB

Offset TC

LSB

23

21

3E

0

3C

1

3F

3D

1

3A

38

3B

39

36

34

37

35

32

1

30

MSB

FSO

LSB

33

31

4E

1

4C

0

4F

4D

0

4A

48

4B

49

46

44

47

45

42

1

40

MSB

FSOTC

LSB

43

41

5E

0

5C

0

5F

5D

0

5A

58

5B

59

56

54

57

55

52

0

50

0

53

51

6E

0

6C

0

6F

6D

0

6A

68

6B

69

66

64

67

65

62

0

60

User defined bits

63

61

7E

0

7C

0

7F

7D

0

7A

78

7B

79

76

74

77

75

72

0

70

User defined bits

73

71

Note: The MAX1458 processes the Reserved Bits in the EEPROM. If these bits are not properly programmed, the configuration

and DAC registers will not be updated correctly.

* The contents of the Reserved EE Address 50–5F must all be reset to zero.

= Reserved Bits

0

0

0

0

0

0

0

0

0

0

0