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參數(shù)資料
| 型號(hào)： | A1244LLHLX-I1-T |
| 元件分類(lèi)： | 磁阻傳感器 |
| 英文描述： | MAGNETIC FIELD SENSOR-HALL EFFECT, -8-8mT, RECTANGULAR, SURFACE MOUNT |
| 封裝： | 2 MM X 3 MM, 1 MM HEIGHT , LEAD FREE, SOT-23W, 3 PIN |
| 文件頁(yè)數(shù)： | 11/12頁(yè) |
| 文件大小： | 251K |
| 代理商： | A1244LLHLX-I1-T |
Figure 2. Typical application circuits
GND
A1244
VCC
V+
0.01 μF
ECU
RSENSE
CBYP
GND
A1244
VCC
V+
0.01 μF
RSENSE
CBYP
(A) Low side sensing
(B) High side sensing
Amp
Regulator
Clock/Logic
Hall Element
Sa
mp
le
an
d
Ho
ld
Low-Pass
Filter
Chopper Stabilization Technique
When using Hall-effect technology, a limiting factor for
switchpoint accuracy is the small signal voltage developed
across the Hall element. This voltage is disproportionally small
relative to the offset that can be produced at the output of the
Hall sensor IC. This makes it difficult to process the signal while
maintaining an accurate, reliable output over the specified oper-
ating temperature and voltage ranges. 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 base band, 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 350 kHz
high frequency clock. For demodulation process, a sample and
hold technique is used, where the sampling is performed at twice
the chopper frequency. 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 out-
put voltages and precise recoverability 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-density logic integration and sample-
and-hold circuits.
Figure 3. Chopper stabilization circuit (Dynamic Quadrature Offset Cancellation)
Chopper-Stabilized, Two Wire
Hall-Effect Latch
A1244
8
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Preliminary Data Sheet
Subject to Change Without Notice
May 5, 2011
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PDF描述 |
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| A1244LUA-I1-T | MAGNETIC FIELD SENSOR-HALL EFFECT, -8-8mT, RECTANGULAR, THROUGH HOLE MOUNT |
| A1321LUA | MAGNETIC FIELD SENSOR-HALL EFFECT, 10mT, 0.20-4.70V, RECTANGULAR, THROUGH HOLE MOUNT |
| A1322ELHLT | MAGNETIC FIELD SENSOR-HALL EFFECT, 10mT, 0.20-4.70V, RECTANGULAR, SURFACE MOUNT |
| A1321L | MAGNETIC FIELD SENSOR-HALL EFFECT, 0.2-4.7V, RECTANGULAR, SURFACE MOUNT |
| A1322L | MAGNETIC FIELD SENSOR-HALL EFFECT, 0.2-4.7V, RECTANGULAR, SURFACE MOUNT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A1244LLHLX-I2-T | 功能描述:IC HALL EFFECT LATCH SOT-23W RoHS:是 類(lèi)別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開(kāi)關(guān)，線性，羅盤(pán) (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類(lèi)型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類(lèi)型:數(shù)字式，PWM，8.5 位串行 特點(diǎn):可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| A1244LUA-I1-T | 功能描述:IC HALL EFFECT LATCH SIP-3 RoHS:是 類(lèi)別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開(kāi)關(guān)，線性，羅盤(pán) (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類(lèi)型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類(lèi)型:數(shù)字式，PWM，8.5 位串行 特點(diǎn):可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| A1244LUA-I2-T | 功能描述:IC HALL EFFECT LATCH SIP-3 RoHS:是 類(lèi)別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開(kāi)關(guān)，線性，羅盤(pán) (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類(lèi)型:旋轉(zhuǎn) 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類(lèi)型:數(shù)字式，PWM，8.5 位串行 特點(diǎn):可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| A1245LLHLT-I1-T | 功能描述:IC HALL EFFECT LATCH SOT23-3 制造商:allegro microsystems, llc 系列:- 包裝:帶卷（TR） 零件狀態(tài):有效 功能:卡銷(xiāo) 技術(shù):霍爾效應(yīng) 極化:南極 感應(yīng)范圍:4mT 跳閘，-4mT 釋放 測(cè)試條件:-40°C ~ 150°C 電壓 - 電源:3 V ~ 24 V 電流 - 電源（最大值）:6.9mA 電流 - 輸出（最大值）:- 輸出類(lèi)型:開(kāi)路漏極 特性:- 工作溫度:-40°C ~ 150°C（TA） 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應(yīng)商器件封裝:SOT-23-3 標(biāo)準(zhǔn)包裝:3,000 |
| A1245LLHLT-I2-T | 功能描述:IC HALL EFFECT LATCH SOT23-3 制造商:allegro microsystems, llc 系列:- 包裝:帶卷（TR） 零件狀態(tài):有效 功能:卡銷(xiāo) 技術(shù):霍爾效應(yīng) 極化:南極 感應(yīng)范圍:4mT 跳閘，-4mT 釋放 測(cè)試條件:-40°C ~ 150°C 電壓 - 電源:3 V ~ 24 V 電流 - 電源（最大值）:5mA 電流 - 輸出（最大值）:- 輸出類(lèi)型:開(kāi)路漏極 特性:- 工作溫度:-40°C ~ 150°C（TA） 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應(yīng)商器件封裝:SOT-23-3 標(biāo)準(zhǔn)包裝:3,000 |
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