DA5534_022.doc
July 17th, 2002
5
ECN493
PRESSURE OUTPUT CHARACTERISTICS
With the calibration data provided by the MS5534 system (stored in the interface IC) the following characteristics
can be achieved:
Parameter
Conditions
Min
Typ
Max
Unit
Note
Resolution
0.1
mbar
1
Absolute Pressure Accuracy
p = 750 …1100mbar
Ta = 25°C
-1.5
+1.5
mbar
2
Relative Pressure Accuracy
p = 750 …1100mbar
Ta = 25°C
-0.5
+0.5
mbar
3
Maximum Error over
Temperature
Ta = -10…+60°C
p = const.
-1
+1
mbar
4
-1
+6
mbar
5
Long-term Stability
12 month
-1
mbar
6
Maximum Error over Supply
Voltage
VDD = 2.2…3.6V
-1.5
0
+1.5
mbar/V
Notes:
1. A stable pressure reading of the given resolution requires to take the average of 2 to 4 subsequent pressure
values due to noise of the ADC. A better resolution can be obtained with more averaging.
2. Maximum error of pressure reading over the pressure range.
3. Maximum error of pressure reading over the pressure range after offset adjustment at one pressure point.
4. With the second-order temperature compensation as described in Section "Calculation of pressure using
compensation coefficients C1 to C5".
5. With the first-order temperature compensation as described in Section "Calculation of pressure using
compensation coefficients C1 to C5".
6. The long-term stability is measured with non-soldered devices
TEMPERATURE OUTPUT CHARACTERISTICS
This temperature information is not required for most applications, but it is necessary to allow for temperature
compensation of the pressure output. The reference temperature is 20°C.
Parameter
Conditions
Min
Typ
Max
Unit
Resolution
0.005
0.015
°C
Accuracy
at reference temperature
-0.8
0.8
°C
Maximum Error over Supply
Voltage
VDD = 2.2…3.6V
-0.08
+ 0.08
°C/V
Notes:
1.
Refer to the paragraph second-order temperature compensation in the section ‘FUNCTION’
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