參數(shù)資料
型號(hào)： A1374LKB-T
廠商： Allegro MicroSystems, Inc.
英文描述： HIgh Precision, Output Pin Programmable Linear Hall Effect Sensors
中文描述： 高精度，輸出引腳可編程線(xiàn)性霍爾效應(yīng)傳感器
文件頁(yè)數(shù)： 12/23頁(yè)
文件大小： 435K
代理商： A1374LKB-T
12
A1373-DS, Rev. 3
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
High Precision, Output Pin Programmable, Linear Hall Effect Sensors
A1373 and A1374
Chopper Stabilization Technique
Chopper stabilization is a unique approach used to minimize
Hall offset on the chip. The patented Allegro technique, namely
Dynamic Quadrature Offset Cancellation, removes key sources
of the output drift induced by thermal and mechanical stresses.
This offset reduction technique is based on a signal modulation-
demodulation process. The undesired offset signal is separated
from the magnetic field-induced signal in the frequency domain,
through modulation.
The subsequent demodulation acts as a modulation process for
the offset, causing the magnetic field-induced signal to recover
its original spectrum at baseband, while the dc offset becomes
a high-frequency signal. The magnetic-sourced signal then can
pass through a low-pass filter, while the modulated dc offset is
suppressed.
The chopper stabilization technique uses a 200 kHz high
frequency clock. For demodulation process, a sample and hold
technique is used, where the sampling is performed at twice the
chopper frequency (400 kHz). This high-frequency operation
allows a greater sampling rate, which results in higher accuracy
and faster signal-processing capability.
This approach desensitizes the chip to the effects of thermal and
mechanical stresses, and produces devices that have extremely
stable quiescent Hall output voltages and precise recoverabil-
ity after temperature cycling. This technique is made possible
through the use of a BiCMOS process, which allows the use of
low-offset, low-noise amplifiers in combination with high-den-
sity logic integration and sample-and-hold circuits.
Amp
Regulator
Clock/Logic
Hall Element
S
H
Low-Pass
Filter
Concept of Chopper Stabilization Technique
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A1374LKBTI 制造商:ALLEGRO 制造商全稱(chēng):Allegro MicroSystems 功能描述:High Precision, Output Pin Programmable Linear Hall Effect Sensors
A1374LKBTI-T 制造商:ALLEGRO 制造商全稱(chēng):Allegro MicroSystems 功能描述:High Precision, Output Pin Programmable Linear Hall Effect Sensors
A1375 制造商:HAKKO Corporation 功能描述:
A1375/P 制造商:HAKKO Corporation 功能描述:
A1377LUCTN-TC1-T 功能描述:Hall Effect Sensor Single Axis 3-SSIP 制造商:allegro microsystems, llc 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類(lèi)型:線(xiàn)性 技術(shù):霍爾效應(yīng) 軸:單路 感應(yīng)范圍:±40mT 電壓 - 電源:4.5 V ~ 5.5 V 電流 - 電源（最大值）:10mA 電流 - 輸出（最大值）:10mA 輸出類(lèi)型:推挽式 分辨率:- 帶寬:2.5kHz 工作溫度:-40°C ~ 150°C 特性:可編程，溫度補(bǔ)償 封裝/外殼:3-SIP 供應(yīng)商器件封裝:3-SSIP 標(biāo)準(zhǔn)包裝:1
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