A1140/42/43/45
Preliminary Data Sheet
PRELIMINARYL DATA SHEET
SUBJECT TO CHANGE WITHOUT NOTICE Two-Wire, Factory-Programmed, Chopper-Stabilized,
Unipolar Hall-Effect Switch
See typical application drawing for UA pinning.
The A114X is a two-wire, unipolar, Hall-effect switch with factory
programmability for end-of-line optimization of switch point accuracy. This
device uses a patented high frequency chopper-stabilization technique on
Allegro's most advanced BiCMOS wafer fabrication process to achieve
magnetic stability and to eliminate offset inherent in single-element devices
and from harsh-application environments.
This device provides on-chip transient protection. A zener clamp on
the power supply protects against over-voltage conditions on the supply
line.
The output of the A1143 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 A1140/2/5 has the opposite polarity as the
A1143, switching LOW in the presence of a sufficiently large south-pole
magnetic 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.
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
LH1……………………………….….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 Low switch-point drift over temperature
s Low stress sensitivity
♦ Factory programmed at end-of-line
s Optimized switch Points
♦ 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. A1142LUA).
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.