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參數(shù)資料
| 型號： | ADXL321 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Small and Thin 18 g Accelerometer |
| 中文描述： | 小而薄的18克加速度 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 379K |
| 代理商： | ADXL321 |
ADXL321
THEORY OF OPERATION
The ADXL321 is a complete acceleration measurement system
on a single monolithic IC. The ADXL321 has a measurement
range of ±18
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 10 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADXL321EB | Small and Thin 18 g Accelerometer |
| ADXL321JCP | Small and Thin 18 g Accelerometer |
| ADXL321JCP-REEL | Small and Thin 18 g Accelerometer |
| AF100 | UNIVERSAL ACTIVE FILTER |
| AF100-1CJ | UNIVERSAL ACTIVE FILTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADXL321EB | 功能描述:BOARD EVAL FOR ADXL321 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 傳感器 系列:iMEMS® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| ADXL321JCP | 功能描述:IC ACCELEROMETER DUAL-AX 16LFCSP RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 加速計 系列:- 標(biāo)準(zhǔn)包裝:1 系列:SCA1000 軸:X，Y 加速范圍:±1.7g 靈敏度:1.2V/g 電源電壓:4.75 V ~ 5.25 V 輸出類型:數(shù)字 帶寬:50±30Hz 接口:SPI 安裝類型:表面貼裝 封裝/外殼:12-SMD 供應(yīng)商設(shè)備封裝:12-SMD 其它名稱:551-1007-1 |
| ADXL321JCP | 制造商:Analog Devices 功能描述:Accelerometer |
| ADXL321JCP-REEL | 功能描述:IC ACCELEROMETER DUAL 16LFCSP RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 加速計 系列:- 標(biāo)準(zhǔn)包裝:1 系列:SCA1000 軸:X，Y 加速范圍:±1.7g 靈敏度:1.2V/g 電源電壓:4.75 V ~ 5.25 V 輸出類型:數(shù)字 帶寬:50±30Hz 接口:SPI 安裝類型:表面貼裝 封裝/外殼:12-SMD 供應(yīng)商設(shè)備封裝:12-SMD 其它名稱:551-1007-1 |
| ADXL321JCP-REEL7 | 功能描述:IC ACCELEROMETER DUAL 16LFCSP RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 加速計 系列:- 標(biāo)準(zhǔn)包裝:1 系列:SCA1000 軸:X，Y 加速范圍:±1.7g 靈敏度:1.2V/g 電源電壓:4.75 V ~ 5.25 V 輸出類型:數(shù)字 帶寬:50±30Hz 接口:SPI 安裝類型:表面貼裝 封裝/外殼:12-SMD 供應(yīng)商設(shè)備封裝:12-SMD 其它名稱:551-1007-1 |
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