A3212ELHLT-T Allegro, A3212ELHLT-T Datasheet

A3212ELHLT-T

Manufacturer Part Number

A3212ELHLT-T

Description

Manufacturer

Allegro

Datasheets

1.A3212ELHLT-T.pdf (12 pages)

2.A3212ELHLT-T.pdf (13 pages)

3.A3212ELHLT-T.pdf (12 pages)

4.A3211ELHLT-T.pdf (13 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A3212ELHLT-T

Manufacturer:

ALLEGRO

Quantity:

13 500

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A3212ELHLT-T

Manufacturer:

ALLEGR

Quantity:

1 037

Company:

Meier Automation Equipment Co., Limited

Part Number:

A3212ELHLT-T

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Company:

H&T Electronics

Part Number:

A3212ELHLT-T

Quantity:

1 500

Company:

H&T Electronics

Part Number:

A3212ELHLT-T

Quantity:

1 500

Current page: 1 of 13
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Supply Voltage, V

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

Output Off Voltage, V

Output Current, I

Junction Temperature, T

Operating Temperature, T

Storage Temperature Range,

Caution: These CMOS devices have input

static protection (Class 3) but are still sus-

ceptible to damage if exposed to extremely

high static electrical charges.

ABSOLUTE MAXIMUM RATINGS

Range 'E-' .................... -40°C to +85°C

Range 'L-' .................. -40°C to +150°C

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

Approximate actual size

Package A3212EELLT-T

2 x 2 mm MLPD

OUT

.............................. 5 V

........................... 1 mA

OUT

................ +170°C

...................... 5 V

A3212

The A3212 integrated circuit is an ultra-sensitive, pole in de pen dent Hall-effect

switch with a latched digital output. This sensor is es pe cial ly suited for opera-

tion in battery-operated, hand-held equip ment such as cellular and cordless

tele phones, pagers, and palmtop com put ers. A 2.5 volt to 3.5 volt operation and a

unique clocking scheme reduce the average op er at ing power requirements to less

than 15 µW with a 2.75 volt supply.

Unlike other Hall-effect switches, either a north or south pole of suf fi cient

strength will turn the output on; in the absence of a magnetic field, the output

is off. The polarity independence and minimal power requirement allow these

devices to easily replace reed switches for superior reliability and ease of manu-

facturing, while eliminating the requirement for signal conditioning.

Improved stability is made possible through chopper stabilization (dynamic off-

set cancellation), which reduces the residual offset voltage normally caused by

device overmolding, temperature de pen den cies, and thermal stress.

This device includes on a single silicon chip a Hall-voltage generator, small-sig-

nal amplifier, chopper sta bi li za tion, a latch, and a MOSFET output. Ad vanced

BiCMOS processing is used to take advantage of low-voltage and low-power

requirements, component matching, very low input-offset errors, and small com-

ponent geometries.

Four package styles provide magnetically op ti mized solutions for most ap pli -

ca tions. Miniature low-profile surface-mount package types EH and EL

(0.75 and 0.50 mm nominal height) are leadless, LH is a leaded low-profile

SMD, and UA is a three-lead SIP for through-hole mount ing. Each package is

available in a lead (Pb) free version (suffix, –T) with 100% matte tin plated lead-

frame. EL package for limited release, engineering samples available.

FEATURES

■

MICROPOWER, ULTRA-SENSITIVE

Micropower Operation

Operation with North or South Pole

2.5 V to 3.5 V Battery Operation

Chopper Stabilized

Superior Temperature Stability

Extremely Low Switch-Point Drift

Insensitive to Physical Stress

ESD Protected to 5 kV

Sol id-State Reliability

Small Size

Easily Manufacturable with Magnet Pole Independence

HALL-EF FECT SWITCH

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