3250
PROGRAMMABLE, CHOPPER-
STABILIZED, PRECISION,
HALL-EFFECT SWITCH
FUNCTIONAL BLOCK DIAGRAM
1
SUPPLY
REG.
PROGRAM
LOGIC
OFFSET
ADJUST
DYNAMIC
OFFSET CANCELLATION
POWER-UP
OUTPUT
SAMPLE
& HOLD
X
LOW-PASS
FILTER
3
CONTROL
CURRENT
LIMIT
<1Ω
GROUND
2
Dwg. FH-020-3
makes these devices extremely useful for transmission
speed sensing.
The first character of the part number suffix deter-
mines the device operating temperature range. Suffix
‘E–’ is for the automotive and industrial temperature
range of -40°C to +85°C. Suffix ‘L–’ is for the auto-
motive and military temperature range of -40°C to
+150°C. Two package styles provide a magnetically
optimized package for most applications. Suffix ‘–LT’
is a miniature SOT-89/TO-243AA transistor package
for surface-mount applications; while suffix ‘–UA’ is a
three-lead ultra-mini-SIP for through-hole mounting.
FEATURES AND BENEFITS
s
Chopper Stabilized for
Extremely Low Switch-Point Drift and
Immunity to Mechanical Stress
s
Externally Programmed Switch Point
s
On-Chip Supply-Transient Protection
s
Output Short-Circuit Protection
s
Reverse Battery Protection
s
Wide Operating Voltage Range
s
Defined Power-On State
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2000, Allegro MicroSystems, Inc.
SANKEN [ SANKEN ELECTRIC ]
