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參數(shù)資料
| 型號： | ADXL204CE |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, CQCC8 |
| 封裝： | 5 X 5 MM, 2 MM HEIGHT, ROHS COMPLIANT, HERMETIC SEALED, CERAMIC, LCC-8 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 486K |
| 代理商： | ADXL204CE |
ADXL204
THEORY OF OPERATION
Rev. A | Page 9 of 12
EARTH'S SURFACE
0
TOP VIEW
(Not to Scale)
PIN 8
X
OUT
= 1.65V
Y
OUT
= 1.03V
X
OUT
= 1.65V
Y
OUT
= 1.65V
PIN 8
X
OUT
= 1.65V
Y
OUT
= 2.27V
PIN 8
X
OUT
= 1.03V
Y
OUT
= 1.65V
PIN 8
X
OUT
= 2.27V
Y
OUT
= 1.65V
Figure 22. Output Response vs. Orientation
The ADXL204 is a complete acceleration measurement system on
a single monolithic IC. The ADXL204 is a dual-axis accelerometer.
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 proportional to acceleration. The ADXL204 is
capable of measuring both positive and negative accelerations to
at least ±1.7
g
. The accelerometer can measure static acceleration
forces, such as gravity, allowing it to be used as a tilt sensor.
The sensor is a surface-micromachined polysilicon structure
built on top of the 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 output of the demodulator is amplified and brought off-
chip through a 32 kΩ resistor. At this point, the user can set 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 essentially no
quantization error or nonmonotonic behavior, and temperature
hysteresis is very low, typically less than 10 m
g
over the –40°C
to +125°C temperature range.
Figure 10 shows the zero
g
output performance of eight parts
(X-axis and Y-axis) over a –40°C to +125°C temperature range.
Figure 13 demonstrates the typical sensitivity shift over tem-
perature for V
S
= 3.3 V. Sensitivity stability is typically better
than ±1% over temperature.
相關PDF資料 |
PDF描述 |
|---|---|
| ADXL204CE-REEL | Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| ADXL204EB | Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| ADXL320EB | Small and Thin 5 g Accelerometer |
| ADXL320JCP-REEL | Small and Thin 5 g Accelerometer |
| ADXL320JCP-REEL7 | Small and Thin 5 g Accelerometer |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADXL204CE-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precisionc +-1.7 g Single-/Dual-Axis i MEMS Accelerometer |
| ADXL204EB | 功能描述:BOARD EVAL FOR ADXL204CE RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 傳感器 系列:iMEMS® 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| ADXL205XCE | 功能描述:ACCELEROMETER CLCC 制造商:analog devices inc. 系列:iMEMS? 零件狀態(tài):停產(chǎn) 類型:模擬 軸:X，Y 加速度范圍:±18g 靈敏度（LSB/g）:- 靈敏度（mV/g）:100 帶寬:0.5Hz ~ 10kHz 輸出類型:模擬電壓 電壓 - 電源:3 V ~ 6 V 特性:可調(diào)帶寬 工作溫度:-40°C ~ 125°C（TA） 安裝類型:表面貼裝 標準包裝:95 |
| ADXL205XCE-RL | 功能描述:ACCELEROMETER CLCC 制造商:analog devices inc. 系列:iMEMS? 零件狀態(tài):停產(chǎn) 類型:模擬 軸:X，Y 加速度范圍:±18g 靈敏度（LSB/g）:- 靈敏度（mV/g）:100 帶寬:0.5Hz ~ 10kHz 輸出類型:模擬電壓 電壓 - 電源:3 V ~ 6 V 特性:可調(diào)帶寬 工作溫度:-40°C ~ 125°C（TA） 安裝類型:表面貼裝 標準包裝:3,000 |
| ADXL206 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, ±5 g, Dual-Axis, High Temperature iMEMS Accelerometer |
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