cef13n5 Hope Microelectronics co., Ltd, cef13n5 Datasheet - Page 3

• Manufacturer Part Number: cef13n5
• Description: Barometer Module
• Manufacturer: Hope Microelectronics co., Ltd

Hope RF
2006-12-15
Pressure and Temperature Measurement
The main function of HP03S system is to convert the uncompensated pressure and
temperature signal from a pressure sensor. After the conversion, the following two values
can be obtained:
As the sensor is strongly temperature dependent, it is necessary to compensate for these
effects. Therefore 7 sensor-specific coefficients are stored on the HP03S at our
manufacturing facility, and they allow an accurate software compensation in the
application.
The 7 coefficients are:
Pressure and Temperature Calculation:
Step 1: (calculate offset, sensitivity and final pressure value)
dUT=D2-C5
T = 250 + dUT * C6 / 2 ^ 16
OFF=(C2+(C4-2048)*dUT/2^14)*4
SENS = C1+ C3*dUT/2^10
X= SENS * (D1-7168)/2^14 - OFF
P=X*10/2^5+C7
C1
C2
C3
C4
C5
C6
C7
D1
D2
Tel: [phone] Fax: [phone] E-mail: [e-mail]
. measured temperature
. measured pressure
. Sensitivity coefficient
. Offset coefficient
. Temperature Coefficient of Sensitivity
. Temperature Coefficient of Offset
. Reference Temperature
. Temperature Coefficient of Temperature
. Offset Fine Tuning
0x1000
Parameter Range(Hex:Dec)
0x100
0x960
0x00
0x00
0x00
0x00
0x00
0x00
Hex
BAROMETER MODULE
0x7fff
0x1fff
0x1000
0x8000
0x4000
0xffff
0xffff
0x400
0xA28
PRELIMINARY
“D2”
“D1”
4096
2400
256
0
0
0
0
0
0
Dec
“C1”
“C2”
“C3”
“C4”
“C5”
“C6”
“C7”
32767
32768
16384
65535
65535
8191
1024
4096
2600
http://www.hoperf.com
Version: 1.1
HP03S.doc
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