Datasheet > A1128LLTTR-T

A1128LLTTR-T

更新时间： 2022-02-26 12:04:09

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
20页	963K
描述
Highly Programmable Hall-Effect Switch

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A1128LLTTR-T 数据手册

A1128

Highly Programmable Hall-Effect Switch

Features and Benefits

Description

• Chopper stabilization for stable switchpoints throughout

operating temperature range

TheA1128isafield-programmable,unipolarHall-effectswitch

designed for use in high-temperature applications. This device

uses a chopper-stabilization technique to eliminate offset

inherent in single-element devices.

• Externally programmable:

▫ꢀOperateꢀpoint(through theVCCpin)

▫ꢀOutputꢀpolarity

▫ꢀOutputꢀfallꢀtimeꢀforꢀreducedꢀEMIꢀinꢀ

automotive applications

• On-board voltage regulator for 3 to 24 V operation

• On-chip protection against:

▫ꢀSupplyꢀtransients

The devices are externally programmable. A wide range of

programmability is available on the magnetic operate point,

B_OP, while the hysteresis remains fixed. This advanced

feature allows optimization of the sensor IC switchpoint and

can drastically reduce the effects of mechanical placement

tolerances found in end-use production environments.

▫ꢀOutputꢀshort-circuits

▫ꢀReverseꢀbatteryꢀcondition

A proprietary dynamic offset cancellation technique, with

an internal high-frequency clock, reduces the residual offset

voltage, which is normally caused by device overmolding,

temperaturedependencies, andthermalstress. HavingtheHall

elementandamplifierinasinglechipminimizesmanyproblems

normally associated with low-level analog signals.

Packages: 3-pin SIP (suffix UA) and 3-pin

SOT89 (suffix LT)

Twopackagestylesprovideamagneticallyoptimizedpackage

formostapplications.TypeLTisaminiatureSOT89/TO-243AA

surface mount package that is thermally enhanced with an

exposed ground tab, and type UAis a three-lead ultramini SIP

for through-hole mounting. The packages are lead (Pb) free,

with 100% matte tin plated leadframes.

Not to scale

Functional Block Diagram

V+

Regulator

To All Subcircuits

VCC

Trim Control

TC Trim

Amp

Switchpoint

VOUT

BYPASS

Signal Recovery

Output Fall Time

Program Control

Output Polarity

GND

A1128-DS, Rev. 1

12 3 4 5 6 7...20

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