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MPL115A1S bảng dữ liệu(PDF) 12 Page - NXP Semiconductors

tên linh kiện MPL115A1S
Giải thích chi tiết về linh kiện  Miniature SPI digital barometer, 50 kPa to 115 kPa
PDF  23 Pages
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MPL115A1S bảng dữ liệu(HTML) 12 Page - NXP Semiconductors

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NXP Semiconductors
MPL115A1S
Miniature SPI digital barometer, 50 kPa to 115 kPa
aaa-044106
00
67
00
C0
00
80
00
40
00
80
00
82
00
84
00
86
00
00
CSB
CLK
DOUT
DIN
SPI
Figure 7. SPI read results datagram
Pressure MSB
= 67h
Pressure LSB
= C0h
Pressure
= 67C0h
=
0110 0111 11 00 0000
= 415 ADC counts
Temperature MSB
= 80h
Temperature LSB
= 40h
Temperature
= 8040h
=
1000 0000 01 00 0000
= 513 ADC counts
8.7 Example of pressure compensated calculation in floating-point notation
a0 coefficient
= 2107.875
b1 coefficient
= –2.49512
b2 coefficient
= –1.02069
c12 coefficient = 0.00086665
Pressure
= 415 ADC counts
Temperature
= 513 ADC counts
Pressure compensation
Using the evaluation sequence
The evaluation sequence is located in Section 8.3.
c12x2
= c12 * Tadc = 0.00086665 * 513
= 0.44459
a1
= b1 + c12x2 = –2.49512 + 0.44459
= –2.05052
a1x1
= a1 * Padc
= –2.05052 * 415
= –850.96785
y1
= a0 + a1x1 = 2107.875 + (–850.96785)
= 1256.90715
a2x2
= b2 * Tadc
= –1.02069 * 513
= –523.61444
PComp = y1 + a2x2
= 1256.90715 + (–523.61444)
= 733.29270
MPL115A1S
All information provided in this document is subject to legal disclaimers.
© 2023 NXP B.V. All rights reserved.
Product data sheet
Rev. 1.2 — 8 May 2023
12 / 23



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