Datasheet > A1356

A1356

更新时间： 2022-05-19 13:34:58

品牌	Logo	应用领域
急速微 - ALLEGRO		传感器
页数	文件大小	规格书
20页	451K
描述
High Precision Linear Hall-Effect Sensor

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A1356 数据手册

A1356

High Precision Linear Hall-Effect Sensor

With an Open Drain Pulse Width Modulated Output

Features and Benefits

Description

▪ Simultaneous programming of PWM carrier frequency,

quiescent duty cycle, and sensitivity; for system

optimization

The A1356 device is a high precision, programmable open

drainHall-effectlinearsensorICwithapulsewidthmodulated

(PWM) output. The duty cycle (D) of the PWM output signal

is proportional to an applied magnetic field. TheA1356 device

converts an analog signal from its internal Hall element to

a digitally encoded PWM output signal. The coupled noise

immunity of the digitally encoded PWM output is far superior

to the noise immunity of an analog output signal.

▪ Factory programmed sensitivity temperature coefficient

and quiescent duty cycle drift

▪ Programmability at end-of-line

▪ Pulse width modulated (PWM) output provides increased

noise immunity compared to an analog output

▪ Precise recoverability after temperature cycling

• Output duty cycle clamps provide short circuit diagnostic

capabilities

▪ Optional 50% duty cycle calibration test mode at device

power up

▪ Wide ambient temperature range: –40°C to 150°C

▪ Resistant to mechanical stress

▪ Advanced chopper stabilization circuits and differential

signal path design lead to very low output offset levels

▪ Proprietary on-chip filters provide high output resolution

▪ Wide power supply operating range: 4.5 to 18 V

TheBiCMOS,monolithiccircuitinsideoftheA1356integrates

a Hall element, precision temperature-compensating circuitry

to reduce the intrinsic sensitivity and offset drift of the Hall

element, a small-signal high-gain amplifier, proprietary

dynamic offset cancellation circuits, and PWM conversion

circuitry. The dynamic offset cancellation circuits reduce

the residual offset voltage of the Hall element. Hall element

offset is normally caused by device overmolding, temperature

dependencies, and thermal stress. The high frequency offset

cancellation (chopping) clock allows for a greater sampling

rate, which increases the accuracy of the output signal and

results in faster signal processing capability.

Package: 3-pin SIP (suffix KB)

The A1356 sensor is provided in a lead (Pb) free 3-pin single

inline package (KB suffix), with 100% matte tin leadframe

plaiting.

Not to scale

Functional Block Diagram

PWM Carrier

Generation

VCC/

Programming

Regulator

PWM

Frequency Trim

Signal

Conditioning

PWMOUT

Signal

Recovery

Chopper

Switches

Amp

% Duty

Cycle

Sensitivity

Trim

Temperature

Compensation

% Duty Cycle

Temperature

Coefficient

GND

A1356-DS

12 3 4 5 6 7...20

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