A3282LUA Allegro Microsystems Inc, A3282LUA Datasheet - Page 2

• Manufacturer Part Number: A3282LUA
• Description: IC SWITCH HALL EFFECT 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Bipolar Latchr

Specifications of A3282LUA

• Sensing Range: 150G Trip, -150G Release
• Voltage - Supply: 3.6 V ~ 24 V
• Current - Supply: 3.5mA
• Current - Output (max): 25mA
• Output Type: Digital, Open Collector
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 3-SIP
• Magnetic Type: Latch
• Operating Supply Voltage (min): 3.6V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Mag Sensor Operate Point (g): 150Gs
• Mag Sensor Release Point (g): -150Gs
• Mag Sensor Hysteresis(g): 220Gs
• Package Type: Ultra Mini SIP
• Pin Count: 3
• Mounting: Through Hole
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Features and Benefits
▪ Chopper stabilization
▪ Reverse battery protection
▪ Output short circuit protection
▪ Solid state reliability
▪ Small size
▪ Robust EMC capability
▪ High ESD ratings (HBM)
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
Not to scale
A3282-DS, Rev. 8
▫ Superior temperature stability
▫ Extremely low switchpoint drift
▫ Insensitive to physical stress
VCC
Functional Block Diagram
Amp
Chopper-Stabilized Hall-Effect Latch
Description
The A3282 Hall-effect sensor IC is a temperature stable,
stress-resistant latch. Superior high-temperature performance
is made possible through an Allegro
offset cancellation that utilizes chopper-stabilization. This
method reduces the offset voltage normally caused by device
overmolding, temperature dependencies, and thermal stress.
The A3282 complements the current Allegro family of chopper-
stabilized latching devices.
The A3282 includes the following on a single silicon chip:
voltage regulator, Hall-voltage generator, small-signal
amplifier, chopper stabilization, Schmitt trigger, and a short
circuit protected open-drain output. Advanced BiCMOS wafer
fabrication processing is used to take advantage of low-voltage
requirements, component matching, very low input-offset
errors, and small component geometries.
This device requires the presence of both south and north
polarity magnetic fields for operation. In the presence of a
south polarity field of sufficient strength, the device output
latches on, and only switches off when a north polarity field
of sufficient strength is present.
Continued on the next page…
Regulator
To All Subcircuits
Current Limit
Control
GND
<1Ω
®
VOUT
patented dynamic
A3282