DESCRIPTION

The A1220, A1221, A1222, and A1223 Hall-effect sensor ICs

are extremely temperature-stable and stress-resistant devices

especially suited for operation over extended temperature

ranges to 150°C. Superior high-temperature performance is

made possible through dynamic offset cancellation, which

reduces the residual offset voltage normally caused by device

overmolding, temperature dependencies, and thermal stress. Each

device includes on a single silicon chip a voltage regulator, Hall-

voltage generator, small-signal amplifier, chopper stabilization,

Schmitt trigger, and a short-circuit protected open-drain output

to sink up to 25 mA. A south pole of sufficient strength turns

the output on. A north pole of sufficient strength is necessary

to turn the output off.

An onboard 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

A1220-DS, Rev. 23

MCO-0000309

FEATURES AND BENEFITS

• AEC-Q100 automotive qualified

• Quality Managed (QM)

• Symmetrical latch switch points

• Resistant to physical stress

• Superior temperature stability

• Output short-circuit protection

• Operation from unregulated supply down to 3 V

• Reverse-battery protection

• Solid-state reliability

• Small package sizes

Chopper-Stabilized Precision Hall-Effect Latches

PACKAGES:

FUNCTIONAL BLOCK DIAGRAM

Not to scale

A1220, A1221, A1222, and A1223

3-pin SOT23W

(suffix LH)

3-pin SIP,

matrix HD style

(suffix UA)

February 15, 2022

3-pin SIP,

chopper style

(suffix UA)

TYPICAL APPLICATIONS

Continued on next page...

• Automotive

◦ Power closures/actuators

◦ Electronic power steering

◦ Seat/windows/sunroof

motors

◦ Trunk/door/liftgate motors

• Industrial motor/encoders

• Commutation/index

sensing

• BLDC motors

• Fan motors

Regulator

GND

VCC

VOUT

Control

Current Limit

Dynamic Offset

Cancellation

Sample and Hold

To All Subcircuits

Amp

Low-Pass

Filter

NOT FOR NOT FOR

NEW DESIGNNEW DESIGN

Chopper-Stabilized Precision Hall-Effect Latches

A1220, A1221,

A1222, and A1223

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

RoHS

COMPLIANT

DESCRIPTION (continued)

external resistance in series with the supply pin for greater protection

against high voltage transient events.

Two package styles provide magnetically optimized packages for

most applications. Package type LH is a modified 3-pin SOT23W

surface-mount package, while UA is a three-pin ultra-mini SIP for

through-hole mounting. Both packages are lead (Pb) free, with 100%

matte-tin-plated leadframes.

SELECTION GUIDE

Part Number Packing

[1]

Mounting Ambient, T

(Min) B

(Max)

A1220ELHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

–40°C to 85°C

–40 G 40 G

A1220ELHLT-T

[2]

7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1220EUA-T

[3]

Bulk, 500 pieces/bag 3-pin SIP through hole

A1220LLHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

–40°C to 150°CA1220LLHLT-T

[2]

7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1220LUA-T

[3]

Bulk, 500 pieces/bag 3-pin SIP through hole

A1221ELHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

–40°C to 85°C

–90 G 90 G

A1221ELHLT-T

[2]

7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1221EUA-T

[3]

Bulk, 500 pieces/bag 3-pin SIP through hole

A1221LLHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

–40°C to 150°CA1221LLHLT-T

[2]

7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

A1221LUA-T

[3]

Bulk, 500 pieces/bag 3-pin SIP through hole

A1222ELHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

–40°C to 85°C

–150 G 150 G

A1222ELHLX-T

[2]

13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

A1222EUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1222LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

–40°C to 150°CA1222LLHLX-T

[2]

13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

A1222LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1223ELHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

–40°C to 85°C

–180 G 180 G

A1223ELHLX-T

[2]

13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

A1223EUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

A1223LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount

–40°C to 150°CA1223LLHLX-T

[2]

13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount

A1223LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole

[1]

Contact Allegro for additional packing options.

[2]

Available through authorized Allegro distributors only.

[3]

The chopper-style UA package is not for new design; the matrix HD style UA package is recommended for new designs.

Chopper-Stabilized Precision Hall-Effect Latches

A1220, A1221,

A1222, and A1223

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

ABSOLUTE MAXIMUM RATINGS

Characteristic Symbol Notes Rating Units

Forward Supply Voltage

[1]

26.5 V

Reverse Supply Voltage

[1]

RCC

–30 V

Output Off Voltage

[1]

OUT

26 V

Continuous Output Current I

OUT

25 mA

Reverse Output Current I

ROUT

–50 mA

Operating Ambient Temperature T

Range E –40 to 85 °C

Range L –40 to 150 °C

Maximum Junction Temperature T

(max)

165 °C

For 500 hours 175 °C

Storage Temperature T

stg

–65 to 170 °C

[1]

This rating does not apply to extremely short voltage transients such as Load Dump and/or ESD. Those events have individual

ratings, specific to the respective transient voltage event.

PINOUT DIAGRAMS AND TERMINAL LIST TABLE

Terminal List

Name Description

Number

Package LH Package UA

VCC Connects power supply to chip 1 1

VOUT Output from circuit 2 3

GND Ground 3 2

GND

VOUT

VCC

Package UAPackage LH

GND

VOUT

VCC