3141 Datasheet, PDF (1/8 Pages) Allegro MicroSystems – SENSITIVE HALL-EFFECT SWITCHES FOR HIGH-TEMPERATURE OPERATION

3141 THRU
3144
SENSITIVE HALL-EFFECT SWITCHES
FOR HIGH-TEMPERATURE OPERATION
These Hall-effect switches are monolithic integrated circuits with
tighter magnetic specifications, designed to operate continuously over
extended temperatures to +150°C, and are more stable with both
temperature and supply voltage changes. The unipolar switching
characteristic makes these devices ideal for use with a simple bar or rod
magnet. The four basic devices (3141, 3142, 3143, and 3144) are
identical except for magnetic switch points.
V
CC
1
2
3
Each device includes a voltage regulator for operation with supply
voltages of 4.5 to 24 volts, reverse battery protection diode, quadratic
Hall-voltage generator, temperature compensation circuitry, small-
signal amplifier, Schmitt trigger, and an open-collector output to sink
up to 25 mA. With suitable output pull up, they can be used with
bipolar or CMOS logic circuits. The A3141– and A3142– are im-
proved replacements for the UGN/UGS3140–; the A3144– is the
improved replacement for the UGN/UGS3120–.
Dwg. PH-003A
Pinning is shown viewed from branded side.
The first character of the part number suffix determines 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
automotive and military temperature range of -40°C to +150°C. Three
package styles provide a magnetically optimized package for most
applications. Suffix ‘–LT’ is a miniature SOT89/TO-243AA transistor
package for surface-mount applications; suffix ‘–UA’ is a three-lead
ultra-mini-SIP.
ABSOLUTE MAXIMUM RATINGS
at T_A = +25°C
Supply Voltage, V ............................ 28 V
CC
Reverse Battery Voltage, V_RCC ........... -35 V
Magnetic Flux Density, B .......... Unlimited
Output OFF Voltage, V_OUT .................. 28 V
Reverse Output Voltage, V ........... -0.5 V
OUT
Continuous Output Current, I ...... 25 mA
OUT
Operating Temperature Range, T_A
Suffix ‘E–’ .................. -40°C to +85°C
Suffix ‘L–’ ................ -40°C to +150°C
Storage Temperature Range,
T .............................. -65°C to +170°C
S
FEATURES and BENEFITS
s Superior Temp. Stability for Automotive or Industrial Applications
s 4.5 V to 24 V Operation … Needs Only An Unregulated Supply
s Open-Collector 25 mA Output … Compatible with Digital Logic
s Reverse Battery Protection
s Activate with Small, Commercially Available Permanent Magnets
s Solid-State Reliability
s Small Size
s Resistant to Physical Stress
Always order by complete part number, e.g., A3141ELT .