Sensor IC. A3503 Datasheet
Ratiometric Linear Hall Effect Sensor IC
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: October 31, 2005
The drop-in replacement is the A1302, with a more sensitive option also
available, the A1301.
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 responsibility for its use; nor
for any infringements of patents or other rights of third parties which may result from its use.
Pinning is shown viewed from branded side.
HALL-EFFECT SENSOR ICS
The UGN3503LT, UGN3503U, and UGN3503UA Hall-effect
sensor ICs accurately track extremely small changes in magnetic flux
density—changes generally too small to operate Hall-effect switches.
For motion detectors, gear tooth sensors, and proximity detectors,
they are magnetically driven mirrors of mechanical events. As sensitive
monitors of electromagnets, they can effectively measure a system's
performance with negligible system loading while providing isolation
from contaminated and electrically noisy environments.
Each Hall-effect integrated circuit includes a Hall element,
linear amplifier, and emitter-follower output stage. Problems associated
with handling tiny analog signals are minimized by having the Hall cell
and amplifier on a single chip.
Three package styles provide a magnetically optimized package for
most applications. Package suffix ‘LT’ is a miniature SOT-89/TO-
243AA transistor package for surface-mount applications; suffix ‘U’ is a
miniature three-lead plastic SIP, while ‘UA’ is a three-lead ultra-mini-
SIP. All devices are rated for continuous operation over the temperature
range of -20°C to +85°C.
■ Extremely Sensitive
■ Flat Response to 23 kHz
■ Low-Noise Output
■ 4.5 V to 6 V Operation
■ Magnetically Optimized Package
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC ............................. 8 V
Magnetic Flux Density, B ......... Unlimited
Operating Temperature Range,
TA ............................ -20°C to +85°C
Storage Temperature Range,
TS ........................... -65°C to +150°C
Always order by complete part number, e.g., UGN3503UA .