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參數資料
| 型號： | ADXL320 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Small and Thin 5 g Accelerometer |
| 中文描述： | 小而薄的5克加速度 |
| 文件頁數： | 11/16頁 |
| 文件大小： | 412K |
| 代理商： | ADXL320 |
ADXL320
THEORY OF OPERATION
The ADXL320 is a complete acceleration measurement system
on a single monolithic IC. The ADXL320 has a measurement
range of ±5
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
independent 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 k 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 have been used to ensure
high performance is built-in. As a result, there is neither
quantization error nor nonmonotonic behavior, and
temperature hysteresis is very low (typically less than 3 m
g
over
the 20°C to +70°C temperature range).
Figure 10 shows the zero
g
output performance of eight parts
(X- and Y-axis) over a 20°C to +70°C temperature range.
Figure 13 demonstrates the typical sensitivity shift over
temperature 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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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADXL320EB | 功能描述:BOARD EVAL FOR ADXL320 RoHS:否 類別:編程器，開發系統 >> 評估板 - 傳感器 系列:iMEMS® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| ADXL320JCP | 制造商:Analog Devices 功能描述:Accelerometer Dual 制造商:Analog Devices 功能描述:Accelerometer Dual ±5g 2.5V/3.3V/5V 156mV/g to 192mV/g 16-Pin LFCSP EP 制造商:Analog Devices 功能描述:ACCELEROMETER DUAL 5G 2.4V TO 5.25V 156MV/G TO 192MV/G 16LF - Trays 制造商:Analog Devices 功能描述:Dual Axis Accelerometer 制造商:Analog Devices 功能描述:ACCELEROMETER 2 AXIS 5G LFCSP-16 制造商:Analog Devices 功能描述:ACCELEROMETER, 2 AXIS, 5G, LFCSP-16 制造商:Analog Devices 功能描述:2 Axis 5G Accelerometer ADXL320JCP |
| ADXL320JCP REEL | 制造商:Analog Devices 功能描述: |
| ADXL320JCP | 制造商:Analog Devices 功能描述:Acceleration Sensor IC |
| ADXL320JCP1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Small and Thin 5 g Accelerometer |
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