ALLEGRO 3280 User Manual

查询A3280ELHLT供应商

3280, 3281,

Data Sheet

27609.20c

Suffix '–LT' & '–UA' Pinning

(SOT89/TO-243AA & ultra-mini SIP)

X

PTCT

V

CC

1

SUPPLY

32

GROUND

Dwg. PH-003-2

OUTPUT

AND

3283

CHOPPER-STABILIZED, PRECISION

HALL-EF FECT LATCHES

The A3280--, A3281--, and A3283-- Hall-effect latches are ex treme ly
temperature-stable and stress-resistant sensors 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 surface­mount 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 also available in a lead
(Pb) free version (suffix, –T) , with a 100% matte tin plated leadframe.

Pinning is shown viewed from branded side.

ABSOLUTE MAXIMUM RATINGS

at TA = +25°C

Supply Voltage, VCC .......................... 26.5 V

Reverse Battery Voltage, V

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

Output Off Voltage, V
Continuous Output Current,
I
Reverse Output Current, I
Package Power Dissipation, P
Junction Temperature, T
Operating Temperature Range, T

Range ‘L’.................... -40°C to +150°C

Storage Temperature Range,
T

*Internal current limiting is intended to protect
the device from output short circuits.

......................................... 25 mA*

OUT

Range ‘E’ ..................... -40°C to +85°C

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

S

OUT

.......... -30 V

RCC

.................... 26 V

......... -50 mA

OUT

See Graph

D

................ +170°C

J

A

FEATURES

■ 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

Product Selection Guide

3280, 3281,

AND

3283

CHOPPER-STABILIZED,

PRECISION

HALL-EFFECT LATCHES

Part Number Pb-free Packing* Mounting

A3280ELHLT
A3280ELHLT-T–Yes
A3280ELT
A3280ELT-T
A3280ELTTR
A3280ELTTR-T–Yes
A3280EUA
A3280EUA-T
A3280LLHLT
A3280LLHLT-T–Yes
A3280LLT
A3280LLT-T
A3280LLTTR
A3280LLTTR-T–Yes
A3280LUA
A3280LUA-T
A3281ELHLT
A3281ELHLT-T–Yes
A3281ELT
A3281ELT-T
A3281ELTTR
A3281ELTTR-T–Yes
A3281EUA
A3281EUA-T
A3281LLHLT
A3281LLHLT-T–Yes
A3281LLT
A3281LLT-T
A3281LLTTR
A3281LLTTR-T–Yes
A3281LUA
A3281LUA-T
A3283ELHLT
A3283ELHLT-T–Yes
A3283ELT
A3283ELT-T
A3283ELTTR
A3283ELTTR-T–Yes
A3283EUA
A3283EUA-T
A3283LLHLT
A3283LLHLT-T–Yes
A3283LLT
A3283LLT-T
A3283LLTTR
A3283LLTTR-T–Yes
A3283LUA
A3283LUA-T

*Contact Allegro for additional packing options.

7-in. reel, 3000 pieces/reel SOT23W Surface Mount

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

–

Yes

Bulk, 500 pieces/bag

SOT89 Surface Mount

7-in. reel, 1000 pieces/reel

Bulk, 500 pieces/bag 4-pin SIP through hole

7-in. reel, 3000 pieces/reel SOT23W Surface Mount

Bulk, 500 pieces/bag

SOT89 Surface Mount

7-in. reel, 1000 pieces/reel

Bulk, 500 pieces/bag 4-pin SIP through hole

7-in. reel, 3000 pieces/reel SOT23W Surface Mount

Bulk, 500 pieces/bag

SOT89 Surface Mount

7-in. reel, 1000 pieces/reel

Bulk, 500 pieces/bag 4-pin SIP through hole

7-in. reel, 3000 pieces/reel SOT23W Surface Mount

Bulk, 500 pieces/bag

SOT89 Surface Mount

7-in. reel, 1000 pieces/reel

Bulk, 500 pieces/bag 4-pin SIP through hole

7-in. reel, 3000 pieces/reel SOT23W Surface Mount

Bulk, 500 pieces/bag

SOT89 Surface Mount

7-in. reel, 1000 pieces/reel

Bulk, 500 pieces/bag 4-pin SIP through hole

7-in. reel, 3000 pieces/reel SOT23W Surface Mount

Bulk, 500 pieces/bag

SOT89 Surface Mount

7-in. reel, 1000 pieces/reel

Bulk, 500 pieces/bag 4-pin SIP through hole

Ambient, T

(°C)

–40 to 85

–40 to 150

–40 to 85

–40 to 150

–40 to 85

–40 to 150

A

B

RP(MIN)

(TA = 25°C)

(G)

–40 40

–90 90

–180 180

B

OP(MAX)

(TA = 25°C)

(G)

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2

3280, 3281,

AND

3283

CHOPPER-STABILIZED,
PRECISION
HALL-EFFECT LATCHES

FUNCTIONAL BLOCK DIAGRAM

SUPPLY

800

REG.

TO ALL

SUBCIRCUITS

OUTPUT

X

CONTROL

DYNAMIC

OFFSET CANCELLATION

& HOLD

SAMPLE

FILTER

LOW-PASS

CURRENT

LIMIT

<1Ω

GROUND

Dwg. FH-020-1

Suffix ‘–LH’ Pinning

(SOT23W)

700

600

500

Suffix "–LH"
R

θJA

400

300

200

100

ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS

0

20 60 100 140

= 228°C/W

40 80 120 180

Suffix "–UA"
R

θJA

= 165°C/W

Suffix "E–"

AMBIENT TEMPERATURE in °°°°C

3

Suffix "–LT"
R

θJA

= 180°C/W

Suffix "L–"

X

V

CC

12

SUPPLY

160

Dwg. GH-046-2D

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

Copyright © 2000, 2003, 2004 Allegro MicroSystems, Inc.

3

PTCT

GROUND

Dwg. PH-003-4

OUTPUT

3280, 3281,

AND

3283

CHOPPER-STABILIZED,

PRECISION

HALL-EFFECT LATCHES

ELECTRICAL CHARACTERISTICS over operating temperature range.

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage Range V

Output Leakage Current I

Output Saturation Voltage V

OUT(SAT)

Output Current Limit I

Power-On Time t

Chopping Frequency f

Output Rise Time t

Output Fall Time t

Supply Current I

CC

OFF

OM

po

C

r

f

CC

Operating, TJ < 165°C

V

= 24 V, B < B

OUT

I

= 20 mA, B > B

OUT

B > B

OP

VCC > 4.2 V – – 50 µs

RL = 820 Ω, CL = 20 pF – 0.2 2.0 µs

RL = 820 Ω, CL = 20 pF – 0.1 2.0 µs

B < BRP, VCC = 12 V – 3.0 8.0 mA

1

RP

OP

B > BOP, VCC = 12 V – 4.0 8.0 mA

Reverse Battery Current I

CC

Zener Voltage VZ + V

Zener Impedance z

+ z

z

D

D

V

= -30 V – – -5.0 mA

RCC

ICC = 15 mA, TA = 25°C 283237 V

ICC = 15 mA, TA = 25°C–50–Ω

NOTES: 1. Maximum voltage must be adjusted for power dissipation and junction temperature.

2. BOP = operate point (output turns on); BRP = release point (output turns off).

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

4.2–24V

––10µA

– 185 500 mV

30 – 60 mA

– 340 – kHz

MAGNETIC CHARACTERISTICS over operating voltage range.

Part Numbers

A3280 A3281 A3283

Characteristic Test Conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Units

Operate Point, B

at TA = +25°C and TA = max. 5.0 22 40 15 50 90 100 150 180 G

OP

at TA = -40°C 5.0 – 40 15 – 90 100 – 200 G

Release Point, B

at TA = +25°C and TA = max. -40 -23 -5.0 -90 -50 -15 -180 -150 -100 G

RP

at TA = -40°C -40 – -5.0 -90 – -15 -200 – -100 G

Hysteresis, B

(BOP - BRP)

hys

at TA = +25°C and TA = max. 10 45 80 30 100 180 – 300 360 G

at TA = -40°C – – 80 – – 180 – – 360 G

NOTES: 1. Complete part number includes a suffix to identify operating temperature range (E or L) and

package type (LH, LT, or UA).

2. As used here, negative flux densities are defined as less than zero (algebraic convention) and -50 G is less than +10 G.

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

4. 1 gauss (G) is exactly equal to 0.1 millitesla (mT).

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