Allegro A3260LUA-TL, A3260LUA, A3260LLT, A3260LLH, A3260EUA-TL Datasheet

The A3260-- Hall-effect bipolar switch is an extremely

temperature-stable and stress-resistant sensor 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.

The device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper stabilization,
Schmitt trigger, and a constant-current open-collector output. A south
pole of sufficient strength will turn the output OFF. An on-board
regulator permits operation with supply voltages of 3.5 to 24 volts.
Noise radiation is limited by control of the output current slew rate.

The first character of the part number suffix determines the device
operating temperature range; suffix ‘E–’ is -40°C to +85°C and ‘L–’ is

-40°C to +150°C. Three package styles provide a magnetically opti­mized package for most applications. Suffix ‘–LH’ is a miniature low­profile surface-mount package, ‘–LT’ is a miniature SOT-89/TO­243AA transistor package for surface-mount applications; while suffix
‘–UA’ is a three-lead ultra-mini-SIP for through-hole mounting.

Data Sheet

27631.50

FEATURES

■ Internal Current Regulator for 2-Wire Operation

■ Output Slew Rate Controlled

■ Resistant to Physical Stress

■ Superior Temperature Stability

■ Operation From Unregulated Supply

■ Reverse Battery Protection

■ Solid-State Reliability

■ Small Size

Always order by complete part number: the prefix 'A' + the basic four-digit
part number + a suffix to indicate operating temperature range +
a suffix to indicate package style, e.g., A3260ELH .

3260

2-WIRE, CHOPPER-STABILIZED,

PRECISION HALL-EFFECT BIPOLAR SWITCH

Suffix Code 'LH' Pinning

Supply Voltage, VCC........................... 27 V

Reverse Battery Voltage, V

RCC

.......... -16 V

Magnetic Flux Density, B ........... Unlimited

Package Power Dissipation, PD. See Graph

Junction Temperature, TJ............... +170°C

Operating Temperature Range, T

A

Suffix ‘E–’ .................. -40°C to +85°C

Suffix ‘L–’ ................ -40°C to +150°C

Storage Temperature Range,

TS.............................. -65°C to +170°C

ABSOLUTE MAXIMUM RATINGS

at TA=+25°C

ADVANCE INFORMATION

(subject to change without notice)

June 30, 2000

NC

X

SUPPLY

GROUND

12

3

Dwg. PH-003-5

NO (INTERNAL)

CONNECTION

Pinning is shown viewed from branded side.

3260

2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

2

FUNCTIONAL BLOCK DIAGRAM

W
Copyright © 2000, Allegro MicroSystems, Inc.

Dwg. FH-020-4

X

DYNAMIC

OFFSET CANCELLATION

SUPPLY

REG.

SAMPLE

& HOLD

LOW-PASS

FILTER

TO ALL

SUBCIRCUITS

GROUND

Pinning is shown viewed from branded side.

Suffix Code 'UA' Pinning

(SIP)

Suffix Code 'LT' Pinning

(SOT-89/TO-243AA)

X

Dwg. PH-003-7A

1

SUPPLY

GROUND

32

GROUND

X

Dwg. PH-003-6

1

SUPPLY

GROUND

32

NO (INTERNAL)

CONNECTION

NC

3260

2-WIRE, CHOPPER-STABILIZED,

PRECISION HALL-EFFECT

BIPOLAR SWITCH

www.allegromicro.com

3

ELECTRICAL CHARACTERISTICS over operating temperature range.

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage V

CC

Operating 3.5 12 24 V

Output Current I

GND(L)

B > B

OP

-4.0 -6.5 -8.0 mA

I

GND(H)

B < B

RP

-11 -14.5 -18 mA

Chopping Frequency f

C

– 340 – kHz

Output Slew Rate di/dt CL = 20 pF 0.5 — 2.0 mA/µs

Output Settling Time t

sd

CL = 20 pF — — 20 µs

Reverse Battery Current I

CC

V

RCC

= -16 V – – -15 mA

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Operate Point B

OP

–1030 G

Release Point B

RP

-30 -10 – G

Hysteresis B

hys

BOP - B

RP

–20– G

MAGNETIC CHARACTERISTICS over operating supply voltage and temperature ranges.

NOTE — Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.

NOTES:1. . BOP = operate point (output turns OFF); BRP = release point (output turns ON).

2. Typical Data is at TA = +25°C and VCC = 12 V and is for design information only.

3260

2-WIRE, CHOPPER-STABILIZED,
PRECISION HALL-EFFECT
BIPOLAR SWITCH

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

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