A3240ELT-T Allegro Microsystems Inc, A3240ELT-T Datasheet - Page 2

• Manufacturer Part Number: A3240ELT-T
• Description: IC SWITCH HALL EFFECT SOT-89
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of A3240ELT-T

• Sensing Range: 50G Trip, 5G Release
• Voltage - Supply: 4.2 V ~ 24 V
• Current - Supply: 6mA
• Current - Output (max): 25mA
• Output Type: Digital, Open Collector
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 85°C
• Package / Case: SOT-89-3
• Magnetic Type: Bipolar
• 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): 50Gs
• Mag Sensor Release Point (g): 5Gs
• Mag Sensor Hysteresis(g): 10Gs
• Package Type: SOT-89
• Pin Count: 3 +Tab
• Mounting: Surface Mount
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Features and Benefits
▪ 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:
27621.20i
Not to scale
3-pin SOT89
(LT package)
3-pin SOT23W
(LH package)
X
REG.
SUPPLY
Functional Block Diagram
(UA package)
SUBCIRCUITS
3-pin SIP
TO ALL
Description
The A3240 Hall-effect switch is an extremely tempera-
ture-stable and stress-resistant sensor IC especially suited
for operation over extended tem per a ture 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,
tem per a ture de pen den cies, and thermal stress.
The 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. 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. The LH
and UA packages are also available in a lead (Pb) free version
(suffix, –T) , with a 100% matte tin plated leadframe.
Chopper-Stabilized, Precision
CONTROL
CURRENT
LIMIT
Hall-Effect Switch
<1
GROUND
Dwg. FH-020-1
OUTPUT
A3240