A1126LLHLT-T Allegro Microsystems Inc, A1126LLHLT-T Datasheet

A1126LLHLT-T

Manufacturer Part Number

A1126LLHLT-T

Description

IC SW HALL EFFECT OMNI SOT23W

Manufacturer

Allegro Microsystems Inc

Series

-r

Type

Omnipolar Switchr

Datasheets

1.A1126LLHLT-T.pdf (13 pages)

2.A1126LLHLT-T.pdf (14 pages)

Specifications of A1126LLHLT-T

Sensing Range

±55G Trip, ±50G Release

Voltage - Supply

3 V ~ 24 V

Current - Supply

4mA

Current - Output (max)

Output Type

Digital, Open Drain

Features

Ultra Sensitive

Operating Temperature

-40°C ~ 150°C

Package / Case

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Other names

620-1421-2

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A1126LLHLT-T

Manufacturer:

ALLEGRO

Quantity:

9 000

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Features and Benefits

• Omnipolar operation

• High speed, 4-phase chopper stabilization

• Insensitive to physical stress

• Reverse battery protection

• Robust EMC capability

• Robust ESD

Packages:

Not to scale

A1126-DS

▫ Low switchpoint drift

▫ Superior temperature stability

3-pin ultramini SIP

1.5 mm × 4 mm × 3 mm

(suffix UA)

VCC

Approximate footprint

Preliminary Datasheet

Chopper-Stabilized Omnipolar Hall-Effect Switch

3-pin SOT23-W

2 mm × 3 mm × 1 mm

(suffix LH)

Regulator

Amplifier

Functional Block Diagram

Recovery

Subject to Change Without Notice May 3, 2011

Signal

To all subcircuits

Description

The A1126 integrated circuit is an omnipolar, ultrasensitive

Hall-effect switch with a digital output. This device has an

integrated regulator permitting operation to 24 V.

This device is especially suited for operation through extended

temperature ranges, up to 150°C. Superior high-temperature

performance is made possible through an Allegro

dynamic offset cancellation, which reduces the residual offset

voltage normally caused by device overmolding, temperature

excursions, and thermal stress.

The A1126 Hall-effect switch includes the following on a

single silicon chip: voltage regulator, Hall-voltage generator,

small-signal amplifier, chopper stabilization, Schmitt trigger,

and a short circuit protected open-drain output. Advanced

BiCMOS wafer fabrication processing is used to take advantage

of low-voltage requirements, component matching, very low

input-offset errors, and small component geometries.

The omnipolar operation of the A1126 allows activation with

either a north or a south polarity field of sufficient strength.

In the absence of a magnetic field, the output is off. This

patented magnetic-polarity–independence feature makes

this device an excellent replacement for reed switches, with

improved ease of manufacturing, because the A1126 does not

Continued on the next page…

Switchpoints

Omnipolar

Control

Current

Limit

GND

VOUT

A1126

patented

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