A3295_16 Datasheet, PDF (1/9 Pages) Allegro MicroSystems – Chopper Stabilized, Precision Hall Effect Switch for Consumer and Industrial Applications

A3295
Chopper Stabilized, Precision Hall Effect Switch for
Consumer and Industrial Applications
FEATURES AND BENEFITS
• Resistant to physical stress
• Superior temperature stability
• Output short-circuit protection
• Operation from unregulated supply
• Reverse battery protection
• Solid-state reliability
• Small package size
Packages:
3-Pin SOT23W (suffix LH)
3-Pin SIP (suffix UA)
Not to scale
DESCRIPTION
The A3295 Hall effect switch is an extremely temperature-
stable and stress-resistant sensor IC unipolar switch, especially
suited for operation over extended temperature ranges (up
to 125°C). Superior high-temperature performance is made
possible through Dynamic Offset Cancellation, which reduces
the residual offset voltage normally caused by device package
overmolding, temperature dependencies, and thermal stress.
The device is not intended for automotive applications.
The device includes, on a single silicon chip, a voltage regulator,
a Hall-voltage generator, a small-signal amplifier, chopper
stabilization, a Schmitt trigger, and a short-circuit protected
open-drain output to sink up to 25 mA.Asouth polarity magnetic
field of sufficient strength is required to turn the output on.
An onboard regulator permits operation with supply voltages
in the range of 3 to 24 volts.
Two package styles provide a magnetically optimized package
for most applications. Type LH is a miniature SOT23W low-
profile surface-mount package, and type UA is a three-lead
ultramini SIP for through-hole mounting. Both packages are
lead (Pb) free, with 100% matte tin plated leadframes.
VCC
A3295-DS, Rev. 11
Amp
Regulator
Low-Pass
Filter
Control
Current Limit
OUT
1Ω
GND
Functional Block Diagram