参数资料
型号: MPL115A1T2
厂商: Freescale Semiconductor
文件页数: 10/16页
文件大小: 0K
描述: IC BAROMETER SPI DGTL MINI 8LGA
标准包装: 5,000
压力类型: 绝对
工作压力: 7.2 PSI ~ 16.6 PSI,50 ~ 115 kPa
输出: 数字
精确度: ±1%
电源电压: 2.375 V ~ 5.5 V
端接类型: PCB
工作温度: -40°C ~ 105°C
封装/外壳: 8-TLGA
Figure 5. SPI Start Conversion Datagram
Command to Start Pressure and Temperature Conversion, 0x24
Figure 6. SPI Read Results Datagram
Pressure MSB
= 0x67
Pressure LSB
= 0xC0
Pressure
= 0x67C0
= 0110 0111 11 00 0000
= 415 ADC counts
Temperature MSB = 0x80
Temperature LSB
= 0x40
Temperature
= 0x8040
= 1000 0000 01 00 0000
= 513 ADC counts
3.7
Example of Pressure Compensated Calculation in Floating-point Notation
a0 coefficient
b1 coefficient
b2 coefficient
=
=
=
2107.875
-2.49512
-1.02069
c12 coefficient =
0.00086665
Pressure
Temperature
=
=
415 ADC counts
513 ADC counts
Pressure Compensation:
Pcomp = a0 + ( b1 + c12 ? Tadc ) ? Padc + b2 ? Tadc
MPL115A1
Sensors
10
Freescale Semiconductor, Inc.
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