SCA720-D01

Murata Electronics Oy

4/13

www.muratamems.fi

Doc. nr. 82171500

Rev.A

1.3.

Offset and sensitivit y calibration

Vout offset is calibrated in 0g position:

(

)

g

V

Offset

out

1

+

=

[V]

Nominal offset is Vdd/2:

2

dd

nom

V

Offset

=

[V]

Sensitivity is calibrated as:

(

)

(

)

g

g

V

g

V

y

Sensitivit

out

out

2

1

1

−

−

+

=

[V/g]

Nominal sensitivity is:

9375

.

0

=

nom

y

Sensitivit

[V/g]

1.4.

Error calculations

Total error is the allowed maximum error, which include partial error sources. Total error over

lifetime is specified as a sum of offset and sensitivity errors:

Error

y

Sensitivit

Error

Offset

Error

Total

_

_

_

+

=

[mg]

Offset error is specified as:

(

)

y

Sensitivit

V

g

Vout

Error

Offset

dd

2

1

_

−

+

=

[mg]

Sensitivity error percent is specified as:

(

)

(

)

[

]

%

100

2

1

1

%

_

×

−

−

−

+

=

nom

nom

y

Sensitivit

y

Sensitivit

g

g

Vout

g

Vout

Error

y

Sensitivit

Sensitivity error is specified as:

(

)

[

]

y

Sensitivit

Error

y

Sensitivit

g

Vout

Vout

Error

y

Sensitivit

%

_

1

_

×

+

−

=

[mg]