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參數(shù)資料
| 型號： | MPXY8021A |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Tire Pressure Monitoring Sensor, Temperature Compensated and Calibrated, Fully Integrated, Digital Output(輪胎壓力監(jiān)控傳感器，具有溫度補償與校準、高度集成、數(shù)字輸出功能) |
| 中文描述： | 胎壓監(jiān)測傳感器，溫度補償和校準，全集成，數(shù)字輸出（輪胎壓力監(jiān)控傳感器，具有溫度補償與校準，高度集成，數(shù)字輸出功能） |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 261K |
| 代理商： | MPXY8021A |
Motorola Sensor Device Data
MPXY8021A
5
Output Threshold Adjust
The state of the
OUT
pin is driven by a voltage comparator
whose output state depends on the level of the input voltage on
the sample capacitor and the level of an adjustable 8-bit
threshold voltage. The threshold is adjusted by shifting data bits
into the D/A Register (DAR) via the DATA pin while clocking the
CLK pin. The timing of this data is shown in Figure 5. Data is
transferred into the serial shift register on the rising edge of the
CLK pin. On the falling edge of the 8
th
clock the data in the serial
shift register is latched into the parallel DAR register. The DAR
remains powered up whenever V
DD
is present. The serial data
is clocked into the DATA pin starting with the MSB first. This
sequence of threshold select bits is shown in Table 2.
Table 2. D/A Threshold Bit Assignment
An analog to digital (A/D) conversion can be accomplished
with eight (8) different threshold levels in a successive
approximation algorithm; or the OUT pin can be set to trip at
some alarm level. The voltage on the sample capacitor will
maintain long enough for a single 8-bit conversion, but may
need to be refreshed with a new measured reading if the read
interval is longer than the specified hold time, t
SH
.
The counter that determines the number of clock pulses into
the device is reset whenever the device is placed into the
Measure Pressure or Measure Temperature Modes. This
provides a means to reset the data transfer count in case the
clock stream is corrupted during a transmission. In these two
modes the DATA and CLK pins should not be clocked to reduce
noise in the captured pressure or temperature data. Any
change in the DAR contents should be done during the Standby
or Output Read Modes.
Both the serial bit counter and the state of the DAR are
undefined following power up of the device. The serial bit
counter can be reset by cycling either the SO pin or the S1/VPP
pin to a high level and then back low. The DAR can then be
reset to the lowest level by holding the DATA pin low while
bursting the CLK pin with eight (8) clock pulses.
Figure 5. Serial Data Timing
Pressure Sensor Output
The pressure channel compares the output of its analog
measurement circuit to the D/A reference voltage. The device is
calibrated at two different nominal values depending on the
calibration option.
Temperature Sensor Output
The temperature channel compares the output of a positive
temperature coefficient (PTC) resistor driven by a switched
current source. The current source is only active when the
temperature channel is selected.
Function
Bit Weight
Data Bit
LSB
1
D0
2
D1
4
D2
Voltage Comparator Threshold Adjust (8 bits)
8
D3
16
D4
32
D5
64
D6
MSB
128
D7
CLK
Data
Serial Data
DAR Load *
DAR *
(*) Denotes Internal Signal
1
2
3
4
5
6
7
8
MSB
MSB
Data
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
LSB
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
LSB
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPXY8021A6T1 | 功能描述:板上安裝壓力/力傳感器 SENSORS TPMP RoHS:否 制造商:Honeywell 工作壓力:0 bar to 4 bar 壓力類型:Gage 準確性:+ / - 0.25 % 輸出類型:Digital 安裝風格:Through Hole 工作電源電壓:5 V 封裝 / 箱體:SIP 端口類型:Dual Radial Barbed, Same sides |
| MPXY8021A6U | 功能描述:板上安裝壓力/力傳感器 SENSORS TPMP RoHS:否 制造商:Honeywell 工作壓力:0 bar to 4 bar 壓力類型:Gage 準確性:+ / - 0.25 % 輸出類型:Digital 安裝風格:Through Hole 工作電源電壓:5 V 封裝 / 箱體:SIP 端口類型:Dual Radial Barbed, Same sides |
| MPXY8040A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Tire Pressure Monitoring Sensor Temperature Compensated and Calibrated, Fully Integrated Digital Output |
| MPXY8040A6T1 | 功能描述:板上安裝壓力/力傳感器 TPMP 8-LD GULL WING RoHS:否 制造商:Honeywell 工作壓力:0 bar to 4 bar 壓力類型:Gage 準確性:+ / - 0.25 % 輸出類型:Digital 安裝風格:Through Hole 工作電源電壓:5 V 封裝 / 箱體:SIP 端口類型:Dual Radial Barbed, Same sides |
| MPXY8040A6U | 功能描述:板上安裝壓力/力傳感器 TPMP 8-LD GULL WING RoHS:否 制造商:Honeywell 工作壓力:0 bar to 4 bar 壓力類型:Gage 準確性:+ / - 0.25 % 輸出類型:Digital 安裝風格:Through Hole 工作電源電壓:5 V 封裝 / 箱體:SIP 端口類型:Dual Radial Barbed, Same sides |
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