A3281LLTTR-T Allegro Microsystems Inc, A3281LLTTR-T Datasheet - Page 2

• Manufacturer Part Number: A3281LLTTR-T
• Description: IC SWITCH HALL EFFECT SOT-89
• Manufacturer: Allegro Microsystems Inc
• Type: Bipolar Latchr

Specifications of A3281LLTTR-T

• Sensing Range: 90G Trip, -90G Release
• Voltage - Supply: 4.2 V ~ 24 V
• Current - Supply: 8mA
• Current - Output (max): 25mA
• Output Type: Digital, Open Collector
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 150°C
• Package / Case: SOT-89-3
• Magnetic Type: Latch
• Operating Supply Voltage (min): 4.2V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Output Current: 25mA
• Mag Sensor Operate Point (g): 40Gs
• Mag Sensor Release Point (g): -40Gs
• Mag Sensor Hysteresis(g): 45Gs
• Package Type: SOT-89
• Pin Count: 3 +Tab
• Mounting: Surface Mount
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Features and Benefits
▪ Symmetrical switch points
▪ Resistant to physical stress
▪ Superior temperature stability
▪ Output short-circuit protection
▪ Operation from unregulated supply
▪ Reverse battery protection
▪ Sol id-state reliability
▪ Small size
Packages:
Not to scale
27609.20-DS, Rev. M
Package LT
Package LH
Package UA
Functional Block Diagram
Chopper-Stabilized, Precision
Description
The A3280, A3281, and A3283 Hall-effect latches
are ex treme ly temperature-stable and stress-resistant
sensor ICs especially suited for operation over extended
temperature ranges to +150°C. Superior high-temperature
per for mance is made possible through dynamic offset
cancellation, which reduces the residual offset voltage
normally caused by device overmolding, temperature
dependencies, and thermal stress. The three devices are
iden ti cal except for mag net ic switch points.
Each device includes on a single silicon chip a voltage
regulator, Hall-voltage generator, small-signal amplifier,
chopper sta bi li za tion, Schmitt trigger, and a short-circuit
protected open-collector output to sink up to 25 mA.
A south pole of sufficient strength will turn the output
on. A north pole is necessary to turn the output off. An
on-board regulator permits operation with supply voltages
of 4.2 to 24 volts.
Three package styles provide a magnetically op ti mized
pack age for most ap pli ca tions. Package type LH is a
modified SOT23W surface-mount package, LT is a
miniature SOT89/TO-243AA transistor package for
surface-mount applications; while UA is a three-lead
ultra-mini-SIP for through-hole mounting. Each package
type is lead (Pb) free (suffix, –T), with 100% matte tin
leadframe plating.
A3280, A3281, and A3283
Hall-Ef fect Latches