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A3214ELHL

Description
MICROPOWER, ULTRA-SENSITIVE HALL-EF FECT SWITCHES
CategoryThe connector   
File Size553KB,12 Pages
ManufacturerAllegro
Websitehttp://www.allegromicro.com/
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A3214ELHL Overview

MICROPOWER, ULTRA-SENSITIVE HALL-EF FECT SWITCHES

A3213 and A3214
Micropower Ultra-Sensitive Hall-Effect Switches
FEATURES AND BENEFITS
AEC-Q100 automotive qualified
Micropower operation
Operate with north or south pole
2.4 to 5.5 V battery operation
Chopper stabilized
Superior temperature stability
Extremely low switchpoint drift
Insensitive to physical stress
High ESD protection
Solid-state reliability
Small size
Easily assembly into applications due to magnetic pole
independence
DESCRIPTION
The A3213 and A3214 integrated circuits are ultra-sensitive,
pole-independent Hall-effect switches with a latched digital
output. They are especially suited for operation in battery-
operated, hand-held equipment such as cell and cordless
telephones and palmtop computers. A 2.4 to 5.5 V operation
and a unique clocking scheme reduce the average operating
power requirements: the A3213 to 825 µW, the A3214 to
14 µW (typical, at 2.75 V). Except for operating duty cycle
and average operating current, the A3213 and A3214 are
identical.
Unlike other Hall-effect switches, either a north or south
pole of sufficient strength will turn the output on; in the
absence of a magnetic field, the output is off. The polarity
independence and minimal power requirement allows these
devices to easily replace reed switches for superior reliabil-
ity and ease of manufacturing, while eliminating the require-
ment for signal conditioning.
Improved stability is made possible through chopper sta-
bilization (dynamic offset cancellation), which reduces the
residual offset voltage normally caused by device overmold-
ing, temperature dependencies, and thermal stress.
Continued on the next page…
PACKAGES:
Not to scale
NOT FOR
NEW DESIGN
3-pin SOT23W
(suffix LH)
3-pin SIP,
matrix HD style
(suffix UA)
SUPPLY
3-pin SIP,
chopper style
(suffix UA)
SWITCH
TIMING
LOGIC
DYNAMIC
OFFSET CANCELLATION
OUTPUT
SAMPLE
& HOLD
LATCH
X
GROUND
Dwg. FH-020-5
Functional Block Diagram
27622.62-DS Rev. 28
October 31, 2016

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