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| 型号： | ADXL322JCP |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | Small and Thin +-2 g Accelerometer |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PBCC16 |
| 封装： | 4 X 4 MM, 1.45 MM HEIGHT, LEAD FREE, PLASTIC, LFCSP-16 |
| 文件页数： | 11/16页 |
| 文件大小： | 286K |
| 代理商： | ADXL322JCP |
ADXL322
THEORY OF OPERATION
The ADXL322 is a complete acceleration measurement system
on a single monolithic IC. The ADXL322 has a measurement
range of ±2
g
. It contains a polysilicon surface micromachined
sensor and signal conditioning circuitry to implement an open-
loop acceleration measurement architecture. The output signals
are analog voltages that are proportional to acceleration. The
accelerometer measures static acceleration forces, such as
gravity, which allows it to be used as a tilt sensor.
Rev. 0 | Page 11 of 16
The sensor is a polysilicon surface-micromachined structure
built on top of a silicon wafer. Polysilicon springs suspend the
structure over the surface of the wafer and provide a resistance
against acceleration forces. Deflection of the structure is
measured using a differential capacitor that consists of inde-
pendent fixed plates and plates attached to the moving mass.
The fixed plates are driven by 180° out-of-phase square waves.
Acceleration deflects the beam and unbalances the differential
capacitor, resulting in an output square wave whose amplitude
is proportional to acceleration. Phase-sensitive demodulation
techniques are then used to rectify the signal and determine
the direction of the acceleration.
The demodulator’s output is amplified and brought off-
chip through a 32 kΩ resistor. The user then sets the signal
bandwidth of the device by adding a capacitor. This filtering
improves measurement resolution and helps prevent aliasing.
PERFORMANCE
Rather than using additional temperature compensation
circuitry, innovative design techniques were used to ensure
built-in high performance. As a result, there is neither quanti-
zation error nor nonmonotonic behavior, and temperature
hysteresis is very low (typically less than 5 m
g
over the 20°C
to +70°C temperature range).
Figure 11 shows the zero
g
output performance of eight parts
(X- and Y-axis) over a 20°C to +70°C temperature range.
Figure 14 demonstrates the typical sensitivity shift over tem-
perature for supply voltages of 3 V. This is typically better than
±1% over the 20°C to +70°C temperature range.
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PDF描述 |
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| ADXL322JCP-REEL | Small and Thin +-2 g Accelerometer |
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| ADXL323KCPZ | Small, Low Power, 2-Axis 【3 g i MEMS Accelerometer |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADXL322JCP# | 制造商:Analog Devices 功能描述: |
| ADXL322JCP | 制造商:Analog Devices 功能描述:Acceleration Sensor IC |
| ADXL322JCP-REEL | 功能描述:IC ACCELEROMETER DUAL 16LFCSP RoHS:是 类别:传感器，转换器 >> 加速计 系列:- 标准包装:1 系列:SCA1000 轴:X，Y 加速范围:±1.7g 灵敏度:1.2V/g 电源电压:4.75 V ~ 5.25 V 输出类型:数字 带宽:50±30Hz 接口:SPI 安装类型:表面贴装 封装/外壳:12-SMD 供应商设备封装:12-SMD 其它名称:551-1007-1 |
| ADXL322JCP-REEL7 | 功能描述:IC ACCELEROMETER DUAL 16LFCSP RoHS:是 类别:传感器，转换器 >> 加速计 系列:- 标准包装:1 系列:SCA1000 轴:X，Y 加速范围:±1.7g 灵敏度:1.2V/g 电源电压:4.75 V ~ 5.25 V 输出类型:数字 带宽:50±30Hz 接口:SPI 安装类型:表面贴装 封装/外壳:12-SMD 供应商设备封装:12-SMD 其它名称:551-1007-1 |
| ADXL323 | 制造商:AD 制造商全称:Analog Devices 功能描述:Small, Low Power, 2-Axis 【3 g i MEMS Accelerometer |
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