A1181 Datasheet, PDF (1/14 Pages) Allegro MicroSystems – Two-Wire, Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switch

A1180 – A1184
Preliminary Data Sheet
PRELIMINARY DATA SHEET
SUBJECT TO CHANGE WITHOUT NOTICE
See typical application drawing for UA pinning.
Two-Wire, Programmable, Chopper-Stabilized,
Unipolar Hall-Effect Switch
The A118X is a two-wire, unipolar, Hall-effect switch family designed
for use in high-temperature applications. This device uses a patented high
frequency chopper-stabilization technique on Allegro's new DABIC5
BiCMOS wafer fabrication process to achieve magnetic stability and to
eliminate offset inherent in single-element devices and from harsh-
application environments.
The A118X FAMILY of devices incorporates a programmability
function to allow for external trimming of the operate point. The
programming is performed after final packaging of the sensor and
placement of the Single In-Line Package (SIP) into the application. This
advanced feature allows for optimization of sensor switching performance
by effectively accounting for variations caused by magnet and SIP
placement tolerances.
These devices provide on-chip transient protection. A zener clamp on
the power supply protects against over-voltage conditions on the supply
line.
The output of the A118X FAMILY, with the exception of the A1180/2,
will switch HIGH in the presence of a sufficiently large south-pole magnetic
field and will switch LOW with the removal of the field. The A1180/2 has
the opposite polarity as the others, switching LOW in the presence of a
sufficient magnetic field and HIGH with the removal of the field.
Two package styles provide a magnetically optimized package for
most applications. Suffix “LH” is a miniature low profile package for
surface-mount applications; suffix “UA” is a three-lead ultra-mini Single
Inline Package (SIP) for through-hole mounting.
Factory programmed versions also available, see A1140/42/43/45.
Programming software and/or hardware demonstration kits also available
see ASEK-01 on the Allegro web site, www.allegromicro.com.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
VCC …………………………………….. 26.5 V
Reverse-Battery Voltage
VRB ……………………………………… -18 V
Magnetic Flux Density
B …………………………………… Unlimited
Package Power Dissipation θja,
UA…………………………………. 206 °C/W
LH¹â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦.….248 °C/W
Junction Temperature, TJ ……………….. +170°C
Operating Temperature Range, TA
Suffix “E” …………….……. - 40 °C to + 85 °C
Suffix “L” …………………. - 40 °C to + 150 °C
Storage Temperature Range
TS ………………………… -65 °C to +170 °C
FEATURES / BENEFITS
♦ Chopper Stabilization
s Extremely low switch-point drift
s Low stress sensitivity
♦ One-time external programmability
s Operate Point
♦ On-chip Protection
s Supply transient protection
s Robust ESD/EMC protection
s Reverse-battery protection
♦ On-board Voltage Regulator
s 3.8 V to 24 V operation
Order by complete part number (i.e. A1182LUA).
1 _{The “LH” PPD is based on a 0.062" thick FR4, single-sided board using 2 oz. copper, with a 0.55 mm}2 _{area of copper attached to the ground lead.}