A1220LUA-T Allegro Microsystems Inc, A1220LUA-T Datasheet

A1220LUA-T

Manufacturer Part Number

A1220LUA-T

Description

IC HALL EFFECT LATCH 3V 3-SIP

Manufacturer

Allegro Microsystems Inc

Type

Bipolar Latchr

Datasheet

1.A1221LUA-T.pdf (14 pages)

Specifications of A1220LUA-T

Sensing Range

40G Trip, -40G Release

Voltage - Supply

3 V ~ 24 V

Current - Supply

4mA

Current - Output (max)

25mA

Output Type

Digital, Open Drain

Features

Regulated Voltage

Operating Temperature

-40°C ~ 150°C

Package / Case

3-SIP

Termination Type

SIP

No. Of Pins

Release Point Max

-5G

Hall Effect Type

Latching

Operating Temperature Range

-40Â°C To +150Â°C

Supply Voltage Min

Release Point Min

-40G

Magnetic Type

Latch

Operating Supply Voltage (min)

Operating Supply Voltage (typ)

3.3/5/9/12/15/18V

Operating Supply Voltage (max)

24V

Output Current

25mA

Mag Sensor Operate Point (g)

40Gs

Mag Sensor Release Point (g)

-40Gs

Mag Sensor Hysteresis(g)

45Gs

Package Type

Ultra Mini SIP

Pin Count

Mounting

Through Hole

Operating Temp Range

-40C to 150C

Operating Temperature Classification

Automotive

Filter Terminals

SIP

Rohs Compliant

Yes

Bandwidth

800kHz

Leaded Process Compatible

Yes

Operate Point Max

40G

Operate Point Min

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

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Features and Benefits

▪ Symmetrical latch switchpoints

▪ 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

Packages:

A1220-DS, Rev. 11

3-pin SOT23W (suffix LH)

Not to scale

VCC

Chopper Stabilized Precision Hall Effect Latches

3-pin SIP (suffix UA)

Amp

Functional Block Diagram

Low-Pass

Filter

A1220, A1221, A1222, and A1223

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

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.

Regulator

To All Subcircuits

Current Limit

Control

GND

VOUT

Related parts for A1220LUA-T

A1220LUA-T Summary of contents

Page 1

Chopper Stabilized Precision Hall Effect Latches Features and Benefits ▪ Symmetrical latch switchpoints ▪ Resistant to physical stress ▪ Superior temperature stability ▪ Output short-circuit protection ▪ Operation from unregulated supply down ▪ Reverse battery protection ▪ ...

Page 2

... A1220ELHLT-T 2 7-in. reel, 3000 pieces/reel A1220EUA-T Bulk, 500 pieces/bag A1220LLHLX-T 13-in. reel, 10000 pieces/reel 2 A1220LLHLT-T 7-in. reel, 3000 pieces/reel A1220LUA-T Bulk, 500 pieces/bag A1221ELHLX-T 13-in. reel, 10000 pieces/reel A1221ELHLT-T 2 7-in. reel, 3000 pieces/reel A1221EUA-T Bulk, 500 pieces/bag A1221LLHLX-T 13-in. reel, 10000 pieces/reel ...

Page 3

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 Absolute Maximum Ratings Characteristic Forward Supply Voltage Reverse Supply Voltage Output Off Voltage Continuous Output Current Reverse Output Current Operating Ambient Temperature Maximum Junction Temperature Storage Temperature 3 Package ...

Page 4

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 ELECTRICAL CHARACTERISTICS Characteristics Electrical Characteristics Forward Supply Voltage Output Leakage Current Output Saturation Voltage Output Current Limit Power-On Time 3 Chopping Frequency Output Rise Time 3,4 Output Fall Time ...

Page 5

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance Symbol Package LH, 1-layer PCB with copper limited to solder pads Package LH, 2-layer ...

Page 6

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 A1220, A1221, A1222, and A1223 Electrical Characteristics Average Supply Current (On) versus Temperature 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -60 -40 -20 ...

Page 7

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 Operate Point versus Temperature -60 -40 - (°C) A Release Point versus Temperature 0 ...

Page 8

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 Operate Point versus Temperature -60 -40 - (°C) A Release Point versus Temperature ...

Page 9

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 Operate Point versus Temperature 150 140 130 120 110 100 -60 -40 - (°C) A Release Point versus Temperature -70 ...

Page 10

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 Operation The output of these devices switches low (turns on) when a mag- netic field perpendicular to the Hall element exceeds the operate point threshold, B (see panel A ...

Page 11

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 Chopper Stabilization Technique When using Hall effect technology, a limiting factor for switchpoint accuracy is the small signal voltage developed across the Hall element. This voltage is disproportionally small ...

Page 12

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 Power Derating The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating ...

Page 13

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 +0.12 2.98 –0.08 3 +0.10 2.90 –0. 10° REF 0.95 BSC For Reference Only; not for tooling use (reference dwg. 802840) Dimensions in millimeters Dimensions exclusive of ...

Page 14

A1220, A1221, Chopper Stabilized Precision Hall Effect Latches A1222, and A1223 4.09 45° +0.08 3.02 –0.05 2.16 MAX 0.51 REF 1 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2009-2010, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from ...

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