參數(shù)資料
型號： PPXY8300A6T1
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： Pressure Sensor
英文描述： DIFFERENTIAL, PEIZORESISTIVE PRESSURE SENSOR, RECTANGULAR, SURFACE MOUNT
封裝： SOIC-20
文件頁數(shù)： 47/162頁
文件大?。?/td> 4316K
代理商： PPXY8300A6T1
MPXY8300 Series
Sensors
140
Freescale Semiconductor
SECTION 16 BATTERY CHARGE CONSUMPTION MODELING
The supply current consumed by the MPXY8300 Series can be estimated using the following basic model.
16.1
Standby Current
The overall charge consumed by the standby features is:
where:
QSTDBY = Standby charge over lifetime, tTOT, in mA-hr
tTOT
=
Total lifetime in hours
ISTDBY = General standby current in μA
ILF
=
LFR detector (if used) current in
μA
16.2
Measurement Events
The overall charge consumed by the measurements is:
where:
QMEAS = Total measurement charge over lifetime in mA-sec
QPRESS = Measurement charge per pressure measurement in μA-sec
QTEMP = Measurement charge per temperature measurement in μA-sec
QVOLT
=
Measurement charge per voltage measurement in
μA-sec
nPRESS = Total number of pressure measurements over lifetime
nTEMP
=
Total number of temperature measurements over lifetime
nVOLT
=
Total number of voltage measurements over lifetime
16.3
Transmission Events
The overall charge consumed by the transmissions is:
where:
QXMT
=
Transmit charge over lifetime, tTOT, in mA-hr
QFRM
=
Transmit charge per frame of data in
μA-sec
nXMT
=
Number of transmissions over lifetime
F
=
Frames transmitted during each datagram
Q
STDBY
t
TOT
I
STDBY
I
LF
+
()
1000
-------------------------------------------
×
=
Q
MEAS
1
1000
-------------
n
PRESS
Q
PRESS
n
TEMP
Q
TEMP
n
VOLT
Q
VOLT
×
+
×
+
×
()
×
=
Q
XMT
Q
FRM
1000
------------------
F
×
n
XMT
×
=
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