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MS5536C Datasheet(PDF) 11 Page - Intersema Sensoric SA

Part No. MS5536C
Description  SMD Gage Pressure MODULE
Download  17 Pages
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Maker  INTERSEMA [Intersema Sensoric SA]
Homepage  http://www.meas-spec.com/
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MS5536C Datasheet(HTML) 11 Page - Intersema Sensoric SA

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DA5536C_002.doc
August 25th, 2008
11
0005536C1245 ECN1126
C3/II (8-Bit)
C5/II(8-Bit)
Word 1
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
C4/II (8-Bit)
C6(8-Bit)
Word 2
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
C5/I (4-Bit)
C1/II (12-Bit)
Word 3
DB11
DB10
DB9
DB8
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
C1/I
C4/I
C3/I
C2 (13-Bit)
Word 4
DB12
DB8
DB8
DB12
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Fig. 4: Arrangement (Bit-pattern) of calibration data in Word1 to Word4.
SECOND-ORDER TEMPERATURE COMPENSATION
In order to obtain full accuracy over the whole temperature range, it is recommended to compensate for the
non-linearity of the output of the temperature sensor. This can be achieved by the second-order temperature
calculation, i.e. by replacing the block ‘Calculate actual temperature’ in flow chart Fig. 3 by the following
sequence:
Calculate actual temperature
Difference
between
the
actual
temperature
and
reference temperature:
dT = (D2 - UT1) - ((D2-UT1)*(D2-UT1))/2
18
Actual temperature in °C
TEMP = 2000 + dT*(C6+262)/2
9
(weight: 0.01°C)
Calculate actual temperature
Difference
between
the
actual
temperature
and
reference temperature:
dT = (D2 - UT1) - (9*(D2-UT1)*(D2-UT1))/2
18
Actual temperature in °C
TEMP = 2000 + dT*(C6+262)/2
9
(weight: 0.01°C)
D2≥UT1?
no
yes
Fig. 5: Flow chart for calculating the temperature to the optimum accuracy. The value for dT thus obtained is
then used for the calculation of the temperature compensated pressure as shown in Fig. 3.


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