Pressure sensors
B58621V4121B538
Pressure transmitter with SPI output
AVR 0.016 KA D4 Z14E L ST B538
Symbols and terms
1)
Storage temperature range Tst
A storage of the pressure sensor within the temperature range Tst,min up to Tst,max
and without applied pressure and supply voltage will not affect the performance of the pressure sensor.
2)
3)
Operating temperature range Ta
An operation of the pressure sensor within the temperature range Ta,min up to Ta,max
will not affect the performance of the pressure sensor.
Compensated temperature range TC
While operating the pressure sensor within the temperature range Tc,min up to Tc,max
,
the deviation of the output signal from the values at 25 °C will not exceed the temperature coefficients.
Out of the compensated temperature range, the deviations may increase.
4)
5)
6)
Rated pressure pr
Within the rated pressure range pr,min up to pr,max the signal output characteristic corresponds to this specification.
Over pressure pOV
Pressure cycles within the pressure range 0 up to pov will not affect the performance of the pressure sensor.
Supply voltage VCC
VCC,max is the maximum permissible supply voltage, which can be applied without damages.
VCC,min is the minimum required supply voltage, which has to be applied for normal operation.
7)
8)
9)
Offset DA0
The offset DA0 is the signal output DA (p = 0).
Signal span (Full Scale)
DFS = FS = DA (pr,max) – DA (pr,min
)
Offset error E0LTS
Sum of temperature hysteresis and all non systematic offset changes.
The temperature hysteresis is the change of offset, starting from the value at 25 °C after a temperature change
and return to 25 °C. Determined during temperature cycles in operating temperature range (cycles with 1 K/min).
10)
Non-linearity L (including pressure hysteresis)
The non-linearity is the deviation of the real sensor characteristic ICC = f(p) from the ideal straight line.
It can be approximated by a polynomial of second order, with the maximum at px = pr / 2.
The equation to calculate the non-linearity is:
11)
Characteristic curve error Ec
Within the compensated temperature range Tc,min up to Tc,max
the error of characteristic curve Ec is the maximum deviation to the ideal characteristic curve, including non-linearity,
calibration tolerances as well as temperature errors of offset and span.
Out of the compensated temperature range, the deviations may increase.
12)
13)
Total error Etotal = E0LTS + Ec
Sum of Offset error and characteristic curve error. The offset error E0LTS is a parallel translation of the whole tolerance
zone of the characteristic curve error. A periodic (to be defined by the user) offset correction at a defined pressure
(e.g. zero) may considerably improve the measurement accuracy.
Functional description
For detailed description of the SPI digital interface see the data sheet
“ZSC31014_iLite_datasheet_rev1.51“. (Provided by ZMDi)
IF) Significant characteristic
Internal function relevant significant characteristic
TPS PRS T PD
2020-05-26
Please read Cautions and warnings and
Page 5 of 8
Important notes at the end of this document.
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