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參數(shù)資料
| 型號： | A1155LUA-T |
| 元件分類： | 磁阻傳感器 |
| 英文描述： | MAGNETIC FIELD SENSOR-HALL EFFECT, 1-6mT, RECTANGULAR, THROUGH HOLE MOUNT |
| 封裝： | 1.50 X 4 MM, 3 MM HEIGHT, LEAD FREE, SIP-3 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 301K |
| 代理商： | A1155LUA-T |
GND
A115x
VCC
V+
0.01 μF
A
GND
ECU
Package UA Only
A
RSENSE
CBYP
GND
A115x
VCC
V+
0.01 μF
A
GND
RSENSE
CBYP
Figure 2. Typical application circuits
(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 Switches
A1152, A1153,
A1155, and A1156
8
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| A1174EEWLT-P | MAGNETIC FIELD SENSOR-HALL EFFECT, -5.5-5.5mT, 300mV, RECTANGULAR, SURFACE MOUNT |
| A1174EEWLT-T | MAGNETIC FIELD SENSOR-HALL EFFECT, -5.5-5.5mT, 300mV, RECTANGULAR, SURFACE MOUNT |
| A1193LUA-T | MAGNETIC FIELD SENSOR-HALL EFFECT, 1-20mT, RECTANGULAR, THROUGH HOLE MOUNT |
| A1192LLHLT-T | MAGNETIC FIELD SENSOR-HALL EFFECT, 1-20mT, RECTANGULAR, SURFACE MOUNT |
| A1190LUA-T | MAGNETIC FIELD SENSOR-HALL EFFECT, 1-20mT, RECTANGULAR, THROUGH HOLE MOUNT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A1155LUBTN-F-T | 功能描述:2WIRE FACTORY PROGRAMMED SWITCH 制造商:allegro microsystems, llc 系列:汽車級，AEC-Q100 零件狀態(tài):在售 功能:單極開關(guān) 技術(shù):霍爾效應(yīng) 極化:南極 測試條件:-40°C ~ 150°C 電壓 - 電源:3 V ~ 24 V 電流 - 電源（最大值）:17mA 電流 - 輸出（最大值）:- 輸出類型:電流源 特性:- 工作溫度:-40°C ~ 150°C 封裝/外殼:2-SIP 模塊 供應(yīng)商器件封裝:2-ultramini SIP 標(biāo)準(zhǔn)包裝:8,000 |
| A1155LUBTN-T | 功能描述:2-WIRE FACTORY PROGRAMMED SWITCH 制造商:allegro microsystems, llc 系列:汽車級，AEC-Q100 零件狀態(tài):在售 功能:單極開關(guān) 技術(shù):霍爾效應(yīng) 極化:南極 感應(yīng)范圍:6mT 跳閘，1mT 釋放 測試條件:-40°C ~ 150°C 電壓 - 電源:3 V ~ 24 V 電流 - 電源（最大值）:17mA 電流 - 輸出（最大值）:- 輸出類型:電流源 特性:- 工作溫度:-40°C ~ 150°C 封裝/外殼:2-SIP 模塊 供應(yīng)商器件封裝:2-ultramini SIP 標(biāo)準(zhǔn)包裝:8,000 |
| A1156 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Chopper-Stabilized, Two Wire Hall-Effect Switches |
| A-1156 | 制造商:TE Connectivity 功能描述: |
| A1156LLHLT-T | 功能描述:IC HALL EFFECT SWITCH SOT-23-W RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 磁性 - 霍爾效應(yīng)，數(shù)字式開關(guān)，線性，羅盤 (IC) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型: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 |
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