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ADVANCED COMMUNICATIONS & SENSING
17.9
LSB Equivalence
Using the defined ADC and PGA set-up, an equivalent input pressure per LSB can be calculated. Using the
typical sensor transfer function, we obtain:
The approximate equivalence between Pressure and altitude is defined as follow:
This implementation has a resolution of 8cm altitude.
ACS - Revision 1.0
© Semtech Corp.
⋅
V
pressureRange
LSB
------------------------------------------------------- -
Pressure
=
sensorVoltageRange
Altitude
=
100kPa 8620m
May 2011
Evaluation Kit for SX8724S Data Acquisition System
63nV 200kPa
------------------------------------ -
=
13.04mV
Equation 4
⋅
0.96Pa 8620m
≡
→
-------------------------------------- -
100kPa
Equation 5
Page 48
SX8724SEVK
⋅
=
0.96Pa
=
0.0079Pa
USER GUIDE
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