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| 型号： | A1150LLHLX-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 8/12页 |
| 文件大小： | 260K |
| 描述： | IC HALL EFFECT SW UNI SOT-23W |
| 标准包装： | 30,000 |
| 传感范围： | 110G 跳闸，45G 释放 |
| 类型： | 单极开关 |
| 电源电压： | 3 V ~ 24 V |
| 电流 - 电源： | 5mA |
| 输出类型： | 数字 |
| 特点： | 高速度 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | SOT-23W |
| 供应商设备封装： | SOT-23W |
| 包装： | 带卷 (TR) |
GND
A115x
VCC
V+
0.01 糉
A
GND
ECU
Package UA Only
A
R
SENSE
C
BYP
GND
A115x
VCC
V+
0.01 糉
A
GND
R
SENSE
C
BYP
Figure 2. Typical application circuits
(A) Low side sensing
(B) High side sensing
Amp
Regulator
Clock/Logic
Hall Element
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
A1150, A1152, A1153, A1155,
A1156, A1157, and A1158
8
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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| A1193LLHLX-T | IC HALL EFFECT SW UNI SOT-23-3 |
| A1192LLHLX-T | IC HALL EFFECT SW UNI SOT-23-3 |
| A1104LLHLT-T | IC SWITCH HALL EFFECT SOT-23W |
| A1122LLHLT-T | IC SWITCH HALL EFFECT UNI SOT-23 |
| A1193LLHLT-T | IC HALL EFFECT SWITCH SOT-23-3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
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| A115132A1NZRB | 制造商:C&K Components 功能描述:SP,45,3POS,HI,NON SHORT,SOLDER LUG,BULK - Bulk |
| A115132A1NZRQ | 制造商:C&K Components 功能描述:SP,45,3POS,HI,NON SHORT,SOLDER LUG,BULK - Bulk |
| A115132A1SZRB | 制造商:C&K Components 功能描述:SP,45,3POS,HI,SHORTING,Z3/8-32,BULK - Bulk |
| A115132A1SZRQ | 功能描述:键锁开关 Switchlocks RoHS:否 制造商:C&K Components 触点形式:1 Form A (SPST-NO) 开关功能:Momentary 触点额定值: 电流额定值:100 mA 电压额定值 AC:250 VAC 端接类型:Through Hole 键类型:Keyswitch 变址: 位置数量:1 外壳材料: |
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