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A1102LLHLT-T Datasheet(PDF) 1 Page - Allegro MicroSystems

Part # A1102LLHLT-T
Description  Continuous-Time Switch Family
Download  13 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1102LLHLT-T Datasheet(HTML) 1 Page - Allegro MicroSystems

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The AllegroA1101-A1104 and A1106 Hall-effect switches
are next generation replacements for the popular Allegro
312x and 314x lines of unipolar switches. The A110x family,
produced with BiCMOS technology, consists of devices that
feature fast power-on time and low-noise operation. Device
programmingisperformedafterpackaging,toensureincreased
switchpointaccuracybyeliminatingoffsetsthatcanbeinduced
by package stress. Unique Hall element geometries and low-
offset amplifiers help to minimize noise and to reduce the
residualoffsetvoltagenormallycausedbydeviceovermolding,
temperature excursions, and thermal stress.
The A1101-A1104 and A1106 Hall-effect switches include
the following on a single silicon chip: voltage regulator, Hall-
voltage generator, small-signal amplifier, Schmitt trigger, and
NMOS output transistor. The integrated voltage regulator
permits operation from 3.8 to 24 V. The extensive on-board
protectioncircuitrymakespossiblea±30Vabsolutemaximum
voltage rating for superior protection in automotive and
industrial motor commutation applications, without adding
external components. All devices in the family are identical
except for magnetic switchpoint levels.
The small geometries of the BiCMOS process allow these
devices to be provided in ultrasmall packages. The package
styles available provide magnetically optimized solutions for
mostapplications.PackageLHisanSOT23W,aminiaturelow-
profilesurface-mountpackage,whilepackageUAisathree-lead
ultramini SIPfor through-hole mounting. Each package is lead
(Pb) free, with 100% matte-tin-plated leadframes.
A1101-DS, Rev. 16
• AEC-Q100 automotive qualified
• Continuous-time operation
□ Fast power-on time
□ Low noise
• Stable operation over full operating temperature range
• Reverse battery protection
• Solid-state reliability
• Factory-programmed at end-of-line for optimum
performance
• Robust EMC performance
• High ESD rating
• Regulator stability without a bypass capacitor
Continuous-Time Switch Family
Packages:
Functional Block Diagram
Not to scale
A1101, A1102, A1103, A1104, and A1106
Amp
Regulator
GND
VCC
VOUT
Offset
Gain
Trim
Control
To all subcircuits
LH: A1101, A1102,
A1103, A1104, and
A1106
UA: A1101,
A1102, A1103,
and A1104
UA: A1106
FEATURES AND BENEFITS
DESCRIPTION
3-pin SIP (suffix UA)
3-pin SOT23W (suffix LH)


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