AD22285-R2

更新时间： 2024-01-21 21:23:09

品牌	Logo	应用领域
亚德诺 - ADI		模拟IC 信号电路
页数	文件大小	规格书
12页	202K
描述
Dual-Axis, High-g, MEMS Accelerometers

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技术参数
数据手册

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AD22285-R2 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	LCC
包装说明：	QCCN,	针数：	8
Reach Compliance Code：	unknown	风险等级：	5.57
Is Samacsys：	N	模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	S-CQCC-N8	JESD-609代码：	e4
长度：	5 mm	湿度敏感等级：	NOT APPLICABLE
功能数量：	2	端子数量：	8
最高工作温度：	105 °C	最低工作温度：	-40 °C
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	QCCN
封装形状：	SQUARE	封装形式：	CHIP CARRIER
峰值回流温度（摄氏度）：	260	座面最大高度：	2.2 mm
最大供电电压 (Vsup)：	5.25 V	最小供电电压 (Vsup)：	4.75 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	GOLD
端子形式：	NO LEAD	端子节距：	1.27 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	40
宽度：	5 mm	Base Number Matches：	1

AD22285-R2 数据手册

ADXL278

THEORY OF OPERATION

The ADXL278 provides a fully differential sensor structure and

circuit path, resulting in the industry’s highest resistance to

EMI/RFI effects. This latest generation uses electrical feedback

with zero-force feedback for improved accuracy and stability.

The sensor resonant frequency is significantly higher than the

signal bandwidth set by the on-chip filter, avoiding the signal

analysis problems caused by resonant peaks near the signal

bandwidth.

ANCHOR

MOVABLE

FRAME

PLATE

CAPACITORS

UNIT

SENSING

CELL

FIXED

PLATES

UNIT

FORCING

CELL

MOVING

PLATE

Figure 3 is a simplified view of one of the differential sensor

elements. Each sensor includes several differential capacitor

unit cells. Each cell is composed of fixed plates attached

to the substrate and movable plates attached to the frame.

Displacement of the frame changes the differential capacitance,

which is measured by the on-chip circuitry.

ANCHOR

Figure 5. Simplified View of Sensor Under Acceleration

Complementary 255 kHz square waves drive the fixed plates.

Electrical feedback adjusts the amplitudes of the square waves

such that the ac signal on the moving plates is 5. The feedback

signal is linearly proportional to the applied acceleration. This

unique feedback technique ensures that there is no net

electrostatic force applied to the sensor. The differential

feedback control signal is also applied to the input of the filter,

where it is filtered and converted to a single-ended signal.

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