Datasheet > 1120_V12

1120_V12

更新时间： 2022-09-10 19:17:15

品牌	Logo	应用领域
急速微 - ALLEGRO		开关
页数	文件大小	规格书
14页	326K
描述
Chopper Stabilized Precision Hall Effect Switches

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数据手册

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1120_V12 数据手册

A1120, A1121, A1122, and A1125

Chopper Stabilized Precision Hall Effect Switches

Features and Benefits

Description

▪ Unipolar switchpoints

The A1120, A1121, A1122, and A1125 Hall-effect, unipolar

switches are extremely temperature-stable and stress-resistant

sensor ICs, especially suited for operation over extended

temperature ranges to 150°C. Superior high-temperature

performance is made possible through dynamic offset

cancellation,whichreducestheresidualoffsetvoltagenormally

causedbydeviceovermolding,temperaturedependencies,and

thermal stress.

▪ Resistant to physical stress

▪ Superior temperature stability

▪ Output short-circuit protection

▪ Operation from unregulated supply

▪ Reverse battery protection

▪ Solid-state reliability

▪ Small package sizes

Eachdeviceincludesonasinglesiliconchipavoltageregulator,

Hall-voltage generator, small-signal amplifier, chopper

stabilization, Schmitt trigger, and a short-circuit protected

open-drain output to sink up to 25 mA.

Packages:

An on-board regulator permits operation with supply voltages

of 3 to 24 V. The advantage of operating down to 3 V is that

the device can be used in 3 V applications or with additional

external resistance in series with the supply pin for greater

protection against high voltage transient events.

For the A1120, A1121, and A1122, a south pole of sufficient

strength turns the output on. Removal of the magnetic field

turns the output off. The A1125 is complementary, in that for

these devices, a south pole turns the A1125 output off, and

removal of the magnetic field turns the output on.

3-pin SOT23W (suffix LH)

3-pin SIP (suffix UA)

Not to scale

Twopackagestylesprovideamagneticallyoptimizedpackage

formostapplications.PackagetypeLHisamodifiedSOT23W,

surfacemountpackage,whileUAisathree-leadultra-miniSIP

forthrough-holemounting. Eachpackagetypeislead(Pb)free

(suffix, –T), with a 100% matte tin plated leadframe.

Functional Block Diagram

VCC

Regulator

To All Subcircuits

VOUT

Low-Pass

Filter

Amp

Control

Current Limit

GND

A1120-DS, Rev. 12

12 3 4 5 6 7...14

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