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參數(shù)資料
| 型號(hào)： | KP100 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 壓力傳感器 |
| 英文描述： | Surface Mount Capacitive Silicon Absolute Pressure Sensor |
| 中文描述： | 硅表面貼裝電容絕對(duì)壓力傳感器 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大小： | 75K |
| 代理商： | KP100 |
KP100
Data Book
8
2003-05
Transfer Function
The general relation between output code and pressure is given by the formula
Interface description
The KP100 digital interface consists of the pins DTA_IN, CLKS, DTA_OUT, CS and
DTA_RDY. The interface is active when CS is low.
At the DTA_RDY pin a pulse of approx. 16 μs appears with a frequency of 7.8 kHz. The
rising edge of this pulse indicates that the output register has been loaded with a new
16 bit wide data word, where the first bit is a parity bit. The data can then be clocked out
by applying a clock signal at CLKS. With every falling edge of CLKS the DTA_OUT is
updated, starting with the parity, followed by the LSB. After the 16
th
falling edge the MSB
appears at DTA_OUT and the readout cycle is completed.
Simultaneously data can be loaded into the KP100 via DTA_IN. The data is clocked in
with every rising edge at CLKS. Only the three last bits of the input data are relevant.
They are used to select the diagnosis modes and to switch between 4 and 8 MHz
operation. After completing a read-write cycle the three input bits can be activated by
applying a positive pulse at CS of at least 50 μs.
If for example the diagnosis mode 1 has been choosen the corresponding diagnosis
value will appear at DTA_OUT in the next read-write cycle.
For the simplest mode of operation the CS and DTA_IN pins are pulled to ground
potential. Then only the pins CLKS, DTA_OUT and DTA_RDY are needed to read the
pressure data, since the power-on condition of the KP100 is to deliver pressure data in
8 MHz mode.
Read Write Cycle
A complete read write cycle is shown in the diagram below. DTA_RDY and DTA_OUT
are KP100 output signals, CLKS, DTA_IN and CS are KP100 input signals. The first 13
DTA_IN bits are don’t care bits.
Y(p)
a
b
p
kPa
----------
c
digit
]
+
=
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