[2SMPB-02E] Datasheet Rev.05(Jun.,2017)

11

Copyright 2017 OMRON Corporation. All Rights Reserved.

⑦

Correction pressure without temperature compensation can be calculated by using the below formula and the values

of the step ② and ⑥.

3

2

2

2

2

3

21

12

2

2

11

1

1

00

Pr

Dp

bp

Tr

Dp

b

Tr

Dp

b

Dp

bp

Tr

bt

Tr

Dp

b

Dp

bp

Tr

bt

b









































　　　

Pr

Calculation Result of Pressure [Pa]

Tr

Calculation Result of Temperature ( Tr/256 = Temperature [degreeC] )

Dp

Raw Pressure Data [digit] ( 20-24bits measurement value of PRESS_TXDx Reg. )

b00

Compensation Coefficient of Pressure ( NVM resister: COE_b00_ex, COE_b00_0, COE_b00_1 )

bt1

Compensation Coefficient of Pressure ( NVM resister: COE_bt1_0, COE_bt1_1 )

bp1

Compensation Coefficient of Pressure ( NVM resister: COE_bp1_0, COE_bp1_1 )

b11

Compensation Coefficient of Pressure ( NVM resister: COE_b11_0, COE_b11_1 )

bt2

Compensation Coefficient of Pressure ( NVM resister: COE_bt2_0, COE_bt2_1 )

bp2

Compensation Coefficient of Pressure ( NVM resister: COE_bp2_0, COE_bp2_1 )

b12

Compensation Coefficient of Pressure ( NVM resister: COE_b12_0, COE_b12_1 )

b21

Compensation Coefficient of Pressure ( NVM resister: COE_b21_0, COE_b21_1 )

bp3

Compensation Coefficient of Pressure ( NVM resister: COE_bp3_0, COE_bp3_1 )



How to get compensation coefficients

Each compensation coefficients can be calculated by using the below formula and conversion factors.

32767

OTP

S

A

K







・・・a1,a2,bt1,bt2,bp1,b11,bp2,b12,b21,bp3

16

OTP

K 

・・・・・・・a0,b00

K

Conversion factor

OTP

A

S

23-16bit

15-8bit

7-0bit

a1

-6.3E-03

4.3E-04

-

COE_a1_1

COE_a1_0

a2

-1.9E-11

1.2E-10

-

COE_a2_2

COE_a2_0

bt1

1.0E-01

9.1E-02

-

COE_bt1_1

COE_bt1_0

bt2

1.2E-08

1.2E-06

-

COE_bt2_1

COE_bt2_0

bp1

3.3E-02

1.9E-02

-

COE_bp1_1

COE_bp1_0

b11

2.1E-07

1.4E-07

-

COE_b11_1

COE_b11_0

bp2

-6.3E-10

3.5E-10

-

COE_bp2_1

COE_bp2_0

b12

2.9E-13

7.6E-13

-

COE_bp12_1

COE_bp12_0

b21

2.1E-15

1.2E-14

-

COE_bp21_1

COE_bp21_0

bp3

1.3E-16

7.9E-17

-

COE_bp3_1

COE_bp3_0

K

Conversion factor

OTP

19-12bit

11-4bit

3-0bit

a0

Offset value (20Q16)

COE_a0_1

COE_a0_0

COE_a0_ex

b00

Offset value (20Q16)

COE_b00_1

COE_b00_0

COE_b00_ex



TEMP(PRESS)_TXDx : Temperature and Pressure data : TXD0, TXD1 or TXD2

This sensor holds ADC data with 22 to 24 bits accuracy. It can be obtained as each 24 bits data. If there are redundant

data, the low order positions will be filled by zero (0). The shaded regions as shown below are valid data area.

bit

24

23

22

...

5

4

3

2

1

Note

22bits output

D21

D20

D19

...

D2

D1

D0

0

0

Temp/Press_ave=001

23bits output

D22

D21

D20

...

D3

D2

D1

D0

0

Temp/Press_ave=010

24bits output

D23

D22

D21

...

D4

D3

D2

D1

D0

Temp/Press_ave=011～111

※Dn(D23～

D0) : Sensor Data ……The value of n bit (1 or 0)

※The raw measurement values are unsigned 24bits values. The values need to do subtraction with 2

23

at 24bits output mode. Here is a programing example for Dt and Dp calculation.

)

23

,

2

(

)

0

_

(

)

8

)

1

_

((

)

16

)

2

_

((

)

23

,

2

(

)

0

_

(

)

8

)

1

_

((

)

16

)

2

_

((

pow

TXD

PRESS

TXD

PRESS

TXD

PRESS

Dp

pow

TXD

TEMP

TXD

TEMP

TXD

TEMP

Dt























