A3361 and A3362
2-Wire Chopper Stabilized Hall Effect Switches
Discontinued Product
These parts are no longer in production The device should not be
purchased for new design applications. Samples are no longer available.
Date of status change: May 1, 2006
Recommended Substitutions:
For existing customer transition, and for new customers or new appli-
cations, refer to the
A1142
and
A1143.
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
3361
AND
3362
Suffix Code 'LH' Pinning
(SOT23W)
3
2-WIRE, CHOPPER-STABILIZED,
HALL-EFFECT SWITCHES
The A3361x and A3362x Hall-effect switches are extremely
temperature-stable and stress-resistant sensors. Superior performance
over temperature is made possible through dynamic offset cancellation,
which reduces the residual offset voltage normally caused by device
overmolding, temperature dependencies, and thermal stress. The two
devices differ only in output polarity; the A3361x output current goes
low in the presence of a south pole of sufficient strength; the A3362x
output current goes high.
Each 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. 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.
Three package styles provide a magnetically optimized package for
most applications. Suffix ‘xLH’ is a miniature SOT23W low-profile
surface-mount package,
and suffix 'xUA' is a three-lead ultra-mini SIP
for through-hole mounting.
Data Sheet
27621.50a
NC
1
2
X
GROUND
Dwg. PH-003-5
Pinning is shown viewed from branded side.
NO (INTERNAL)
CONNECTION
SUPPLY
FEATURES
ABSOLUTE MAXIMUM RATINGS
at T
A
=+25
°
C
Supply Voltage, V
CC
........................
26.5 V
Reverse Battery Voltage, V
RCC
..........
-16 V
Magnetic Flux Density, B ...........
Unlimited
Package Power Dissipation, P
D
.
See Graph
Junction Temperature, T
J
...............
+170
°
C
Operating Temperature Range,
T
A
...............................
-40
°
C to +85
°
C
Storage Temperature Range,
T
S
..............................
-65
°
C to +170
°
C
Always order by complete part number: the prefix 'A' + the basic four-digit
part number + a suffix to indicate operating temperature range (E) +
a two-letter suffix to indicate package style, e.g.,
A3361ELH .
s
Internal Current Regulator for 2-Wire Operation
s
Resistant to Physical Stress
s
Superior Temperature Stability
s
Operation From Unregulated Supply
s
Solid-State Reliability
s
Small Size
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