A1180 – A1184
Preliminary Data Sheet
Two-Wire, Programmable, Chopper-Stabilized,
Unipolar Hall-Effect Switch
PRELIMINARY DATA SHEET
SUBJECT TO CHANGE WITHOUT NOTICE
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.
See typical application drawing for UA pinning.
FEATURES / BENEFITS
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Chopper Stabilization
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
sExtremely low switch-point drift
sLow stress sensitivity
VCC …………………………………….. 26.5 V
Reverse-Battery Voltage
VRB ……………………………………… -18 V
Magnetic Flux Density
B …………………………………… Unlimited
Package Power Dissipation qja,
¨
¨
One-time external programmability
sOperate Point
On-chip Protection
sSupply transient protection
sRobust ESD/EMC protection
sReverse-battery protection
UA…………………………………. 206 °C/W
LH1……………………………….….248 °C/W
Junction Temperature, TJ ……………….. +170°C
Operating Temperature Range, TA
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On-board Voltage Regulator
s3.8 V to 24 V operation
Order by complete part number (i.e. A1182LUA).
Suffix “E” …………….……. - 40 °C to + 85 °C
Suffix “L” …………………. - 40 °C to + 150 °C
Storage Temperature Range
TS ………………………… -65 °C to +170 °C
1 The “LH” PPD is based on a 0.062" thick FR4, single-sided board using 2 oz. copper, with a 0.55 mm2 area of copper attached to the ground lead.