A1180LUA Allegro Microsystems Inc, A1180LUA Datasheet - Page 2

• Manufacturer Part Number: A1180LUA
• Description: IC SWITCH HALL EFFECT UNI 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Unipolar Switchr

Specifications of A1180LUA

• Sensing Range: 60G ~ 200G Trip - Programmable, Fixed Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 5mA
• Output Type: Digital, Open Collector
• Features: Programmable
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 3-SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output (max): -

Features and Benefits
▪ Chopper stabilization
▪ Field programmable for optimized switchpoints
▪ On-chip protection
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
Not to scale
A1180-DS, Rev. 14
▫ Low switchpoint drift over operating
▫ Low sensitivity to stress
▫ Supply transient protection
▫ Reverse-battery protection
▫ On-board voltage regulator
▫ 3.5 to 24 V operation
Sensitive Two-Wire Field-Programmable Chopper-Stabilized
temperature range
V+
0.01 uF
VCC
Functional Block Diagram
Clock/Logic
Amp
Program/Lock
Programming
Logic
Unipolar Hall-Effect Switches
Description
The A1180, A1181, A1182, and A1183 devices are sensitive,
two-wire, unipolar, Hall effect switches. The operate point, B
can be field-programmed, after final packaging of the device
and placement into the application. This advanced feature
allows the optimization of the device switching performance,
by effectively accounting for variations caused by mounting
tolerances for the device and the target magnet.
This family of devices are produced on the Allegro
MicroSystems advanced BiCMOS wafer fabrication process,
which implements a patented, high-frequency, chopper-
stabilization technique that achieves magnetic stability and
eliminates the offsets that are inherent in single-element devices
exposed to harsh application environments. Commonly found
in a number of automotive applications, the A1180-83 family
of devices are utilized in sensing: seat track position, seat
belt buckle presence, hood/trunk latching, and shift selector
position.
Two-wire unipolar switches are particularly advantageous
in price-sensitive applications, because they require one less
Continued on the next page…
A1180, A1181, A1182, and A1183
Low-Pass
Filter
Offset
Package UA Only
Regulator
GND
GND
OP
,