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参数资料
| 型号： | DEMOAPEXSENSOR |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 19/20页 |
| 文件大小： | 0K |
| 描述： | BOARD DESIGN ALTITUDE PRESSURE |
| 标准包装： | 1 |
| 传感器类型： | 加速计，压力，水位，高度计/气压计 |
| 传感范围： | 多范围 |
| 接口： | I²C，SPI，模拟 |
| 灵敏度： | 多重 |
| 电源电压： | 10 V |
| 嵌入式： | 是，MCU，8 位 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MPX2102，MPXV5004G，MPL115A2，MMA7361L |
| 产品目录页面： | 2808 (CN2011-ZH PDF) |
Vout = Voff + ? ? ? ?
Inertial MMA7361L
The DEMOAPEXSENSOR has a quick implementation of the 3 axis selectable low-g accelerometer. Notably the demo board
implements the tilt function of the accelerometer and Freefall detection. The Quick Start Guide shows the modes to select either
function.
TILT ANGLE ON THE DEMOAPEXSENSOR
The ADC counts are converted to tilt angles using the equation below:
Δ V
------- ? 1.0g ? Sin θ
Δ g
(eq. 4)
Where:
Vout = Analog output of accelerometer
Voff = Offset voltage of accelerometer
V/g = Sensitivity
1.0g = Earth’s gravity
θ = Tilt Angle
Note: MMA7361 was set to a g-level of 1.5 g.
Offset voltage is typically 1.65V @ 3.3V biasing supply
FREEFALL DETECT ON THE DEMOAPEXSENSOR
Freefall detect is the situation where all three axes of the inertial sensor converge towards the offset or ‘0g’ range. This is also
given as an output on the MMA7361L as the 0g-Detect pin. ‘1’ or logic high is the output for a detected Freefall. Note that this is
also for Freefall in a linear fashion such that the board is not spinning or in rotation as it falls. The DEMOAPEXSENSOR emits a
buzzer noise and a flashing red LED as the Freefall detect occurs.
AN3956
Sensors
Freescale Semiconductor
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DEMO-AT3/4-XX32 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AT-32032 and AT-41532 demonstration for 800-900 MHz applications |
| DEMO-AT32063 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:860 MHz cascode amplifier |
| DEMO-AT3XX11 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AT-31011 2400 MHz 2 stage LNA amplifier; can also be used for AT-30511 or AT-32011 |
| DEMO-AT3XX33 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:900 MHz single stage LNA amplifier using AT-32033; circuit can also be used for AT-30533 or AT-31033 |
| DEMO-ATF3616-3 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2 to 2.4 GHz single stage LNA using ATF-36163 |
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