A3280LLHLT-T Allegro Microsystems Inc, A3280LLHLT-T Datasheet

IC SW HALL EFFECT CHOPPER SOT23W

A3280LLHLT-T

Manufacturer Part Number
A3280LLHLT-T
Description
IC SW HALL EFFECT CHOPPER SOT23W
Manufacturer
Allegro Microsystems Inc
Type
Bipolar Latchr
Datasheets

Specifications of A3280LLHLT-T

Sensing Range
40G Trip, -40G Release
Voltage - Supply
4.2 V ~ 24 V
Current - Supply
8mA
Current - Output (max)
25mA
Output Type
Digital, Open Collector
Features
Regulated Voltage
Operating Temperature
-40°C ~ 150°C
Package / Case
SOT-23W
Magnetic Type
Latch
Operating Supply Voltage (min)
4.2V
Operating Supply Voltage (typ)
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
SOT-23W
Pin Count
3
Mounting
Surface Mount
Operating Temp Range
-40C to 150C
Operating Temperature Classification
Automotive
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
620-1051-2
Features and Benefits
▪ Symmetrical switch points
▪ Resistant to physical stress
▪ Superior temperature stability
▪ Output short-circuit protection
▪ Operation from unregulated supply
▪ Reverse battery protection
▪ Sol id-state reliability
▪ Small size
Packages:
Not to scale
27609.20-DS, Rev. K
Package LT
Package LH
Package UA
Functional Block Diagram
Chopper-Stabilized, Precision
Description
The A3280, A3281, and A3283 Hall-effect latches
are ex treme ly temperature-stable and stress-resistant
sensor ICs especially suited for operation over extended
temperature ranges to +150°C. Superior high-temperature
per for mance is made possible through dynamic offset
cancellation, which reduces the residual offset voltage
normally caused by device overmolding, temperature
dependencies, and thermal stress. The three devices are
iden ti cal except for mag net ic switch points.
Each device includes on a single silicon chip a voltage
regulator, Hall-voltage generator, small-signal amplifier,
chopper sta bi li za tion, Schmitt trigger, and a short-circuit
protected open-collector output to sink up to 25 mA.
A south pole of sufficient strength will turn the output
on. A north pole is necessary to turn the output off. An
on-board regulator permits operation with supply voltages
of 4.2 to 24 volts.
Three package styles provide a magnetically op ti mized
pack age for most ap pli ca tions. Package type LH is a
modified SOT23W surface-mount package, LT is a
miniature SOT89/TO-243AA transistor package for
surface-mount applications; while UA is a three-lead
ultra-mini-SIP for through-hole mounting. Each package
type is lead (Pb) free (suffix, –T), with 100% matte tin
leadframe plating.
A3280, A3281, and A3283
Hall-Ef fect Latches

Related parts for A3280LLHLT-T

A3280LLHLT-T Summary of contents

Page 1

Features and Benefits ▪ Symmetrical switch points ▪ Resistant to physical stress ▪ Superior temperature stability ▪ Output short-circuit protection ▪ Operation from unregulated supply ▪ Reverse battery protection ▪ Sol id-state reliability ▪ Small size Packages: Package LH Package ...

Page 2

... November 2, 2009. Deadline for receipt of LAST TIME BUY orders is April 30, 2010. Recommended substitutions are: for A3280ELHLT-T use A1220ELHLX-T, for A3280EUA-T use A1220EUA-T, for A3280LLHLT-T use A1220LLHLX-T, for A3280LLTTR-T contact Allegro Sales, for A3280LUA-T use A1220LUA-T, for A3281ELHLT-T use A1221ELHLX-T, for A3281LL- ...

Page 3

A3280, A3281 A3283 and X PTCT Suffix '–LT' & '–UA' Pinning (SOT89/TO-243AA & ultra-mini SIP) Chopper-Stabilized, Precision 3 Dwg. PH-003-2 Hall-Effect Latches Suffi x ‘–LH’ Pinning (SOT23W) Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 ...

Page 4

A3280, A3281 A3283 and ELECTRICAL CHARACTERISTICS over operating temperature range. Characteristic Supply Voltage Range Output Leakage Current Output Saturation Voltage Output Current Limit Power-On Time Chopping Frequency Output Rise Time Output Fall Time Supply Current Reverse Battery Current Zener Voltage ...

Page 5

A3280, A3281 A3283 and TYPICAL OPERATING CHARACTERISTICS Chopper-Stabilized, Precision as a function of temperature Hall-Effect Latches Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 5 ...

Page 6

A3280, A3281 A3283 and OUTPUT SATURATION VOLTAGE 300 OUT 200 100 0 -50 - AMBIENT TEMPERATURE IN °C TYPICAL OPERATING CHARACTERISTICS A3280* SWITCH POINTS 40 OPERATE POINT 20 ...

Page 7

A3280, A3281 A3283 and TYPICAL OPERATING CHARACTERISTICS Chopper-Stabilized, Precision as a function of supply voltage (cont’d) OUTPUT SATURATION VOLTAGE 250 225 200 175 150 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE IN VOLTS SUPPLY CURRENT 8.0 7.0 6.0 5.0 4.0 3.0 ...

Page 8

A3280, A3281 A3283 and Chopper-Stabilized Technique. The Hall element can be considered as a resistor array similar to a Wheatstone bridge. A large portion of the offset is a result of the mismatching of these resistors. These devices use a ...

Page 9

A3280, A3281 A3283 and be con nect ed (in close proximity to the Hall element) between the supply and ground of the device to reduce both external noise and noise generated by the chopper-sta tion tech nique. ...

Page 10

A3280, A3281 A3283 and +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 mold flash, gate burrs, and dambar protrusions ...

Page 11

A3280, A3281 A3283 and +0.15 2.45 +0.15 –0.16 4.10 –0.16 1 0.42±0.06 0.50±0.06 For Reference Only; not for tooling use (reference JEDEC. TO-243AA) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead ...

Page 12

A3280, A3281 A3283 and 4.09 45° +0.08 3.02 –0.05 2.16 MAX 0.51 REF 1 2 15.75 ±0.51 +0.05 0.43 –0.07 Copyright ©2002-2009, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the following U.S. patents: ...

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