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 12
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Features and Benefits

▪ Micropower operation

▪ Operation with north or south pole

▪ 2.5 to 3.5 V battery operation

▪ Chopper stabilized

▪ High ESD protection

▪ Sol id-state reliability

▪ Small size

▪ Easily manufacturable with magnet pole independence

Packages:

Not to scale

3211-DS, Rev. 6

DFN/MLPD (EH)

▫ Superior temperature stability

▫ Extremely low switchpoint drift

▫ Insensitive to physical stress

SOT23W (LH)

SUPPLY

DFN/MLPD (EL)

SWITCH

Functional Block Diagram

SIP (UA)

TIMING

LOGIC

Description

The A 3211 and A3212 integrated circuits are ultrasensitive,

pole in de pen dent Hall-effect switches with latched digital

output. These sensors are es pe cial ly suited for operation

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

and cordless tele phones, pagers, and palmtop com put ers.

A 2.5 to 3.5 V operation and a unique clocking scheme reduce

the average op er at ing power requirements to less than 15 μW

with a 2.75 V supply.

Unlike other Hall-effect switches, either a north or south pole

of suf fi cient strength will turn the output on in the A3212,

and in the absence of a magnetic field, the output is off. The

A3211 provides an inverted output. The polarity independence

and minimal power requirements allow these devices to easily

replace reed switches for superior reliability and ease of

manufacturing, while eliminating the requirement for signal

conditioning.

Improved stability is made possible through chopper

stabilization (dynamic offset cancellation), which reduces the

residual offset voltage normally caused by device overmolding,

temperature de pen den cies, and thermal stress.

Continued on the next page…

Micropower, Ultrasensitive

Hall-Ef fect Switches

A3211 and A3212

Dwg. FH-020-5

GROUND

OUTPUT

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