Datasheet > A1359_16

A1359_16

更新时间： 2022-02-26 12:20:52

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
12页	279K
描述
Factory-Programmed Dual Output Linear Hall Effect Sensor IC With Analog and Pulse Width Modulated Outputs

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A1359_16 数据手册

Factory-Programmed Dual Output Linear Hall Effect Sensor IC

With Analog and Pulse Width Modulated Outputs

A1359

Typical Application Circuit

R_PULLUP

A1359

PWMOUT

VOUT

VCC

C_L

R_L

GND

4.7 nF

0.1 μF

5 V

Optional: Recommended

for EMC robustness

Figure 7. Typical application circuit

Chopper Stabilization Technique

When using Hall-effect technology, a limiting factor for

then can pass through a low-pass filter, while the modulated DC

offset is suppressed. In addition to the removal of the thermal and

stress related offset, this novel technique also reduces the amount

of thermal noise in the Hall sensor while completely removing

the modulated residue resulting from the chopper operation. The

chopper stabilization technique uses a high frequency sampling

clock. For demodulation process, a sample-and-hold technique

is used. 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

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.

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 maintain-

ing an accurate, reliable output over the specified operating

temperature and voltage ranges. Chopper stabilization is a unique

approach used to minimize Hall offset on the chip. Allegro

employs a patented technique to remove key sources of the out-

put drift induced by thermal and mechanical stresses. This offset

reduction technique is based on a signal modulation-demodula-

tion 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

Regulator

Clock/Logic

Hall Element

Amp

Anti-aliasing Tuned

LP Filter

Filter

Figure 8. Concept of chopper stabilization technique

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

1...7 8 91011 12

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与A1359_16相关器件

型号	品牌	获取价格	描述	数据表
A1359LLETR-RP-T	ALLEGRO	获取价格	Analog Circuit, 1 Func, PDSO8, TSSOP-8
A1359LLETR-T	ALLEGRO	获取价格	Factory-Programmed Dual Output Linear Hall Effect Sensor IC With Analog and Pulse Width Mo
A135A	ETC	获取价格	IC
A1360	ALLEGRO	获取价格	Low-Noise Programmable Linear Hall Effect Sensor ICs with
A1360_V	ALLEGRO	获取价格	Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Max
A1360LKTTN-T	ALLEGRO	获取价格	Hall Effect Sensor, 4.65-4.80V, BICMOS, Plastic/epoxy, Rectangular, 4 Pin, Through Hole Mo
A1361LKTTN-T	ALLEGRO	获取价格	Hall Effect Sensor, 4.65-4.80V, BICMOS, Plastic/epoxy, Rectangular, 4 Pin, Through Hole Mo
A1362LKTTN-T	ALLEGRO	获取价格	Hall Effect Sensor, 4.65-4.91V, BICMOS, Plastic/epoxy, Rectangular, 4 Pin, Through Hole Mo
A1363	ALLEGRO	获取价格	Low Noise, High Precision, Programmable Linear Hall Effect Sensor IC
A1363LKTTN-10-T	ALLEGRO	获取价格	Low Noise, High Precision, Programmable Linear Hall Effect Sensor IC

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