PRESSURE OUTPUT CHARACTERISTICS
With the calibration data stored in the interface IC of the MS5540B the following characteristics can be achieved:
(VDD = 3.0 V unless noted otherwise)
Parameter
Conditions
Min
Typ
Max
Unit
mbar
mbar
Notes
Resolution
0.1
1
2
p = 750 .. 1100 mbar
Ta = 25°C
p = 750 .. 1100 mbar
Ta = 25°C
Absolute Pressure Accuracy
-1.5
-0.5
-1
+1.5
+0.5
+1
Relative Pressure Accuracy
Error over Temperature
mbar
mbar
3
4
T = 0 .. +50°C
p = 300 .. 1000 mbar
T = -40 .. +85°C
p = 300 .. 1000 mbar
-1
+3
mbar
mbar
mbar
4
5
Long-term Stability
12 months
-1
Maximum Error over Supply
Voltage
VDD = 2.2 .. 3.6 V
p = const.
-1.6
+1.6
NOTES
1) A stable pressure reading of the given resolution requires taking the average of 2 to 4 subsequent pressure
values due to noise of the ADC.
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 “FUNCTION". See next section
for typical operating curves.
5) 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.
(VDD = 3.0 V unless noted otherwise)
Parameter
Conditions
Min
0.005
-0.8
Typ
Max
0.015
0.8
Unit
°C
Notes
Resolution
T = 20°C
°C
Accuracy
T = -40 .. +85°C
°C
1
± 2
Maximum Error over Supply
Voltage
VDD = 2.2 .. 3.6 V
-0.2
+ 0.2
°C
NOTES
1) With the second-order temperature compensation as described in Section “FUNCTION". See next section
for typical operating curves.
DA5540B_007
September 25th, 2006
5
00005540767 ECN 865
INTERSEMA [ INTERSEMA SENSORIC SA ]
