Allegro A1120LLHLX-T SOT23W Hall Effect Magnetic Sensors Switches (Solid State)
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Allegro A1120LLHLX-T SOT23W Hall Effect Magnetic Sensors Switches (Solid State)

MAGNETIC SWITCH UNIPOLAR SOT23W
  • A1120LLHLX-T

  • Allegro MicroSystems

  • A1120LLHLX-T.pdf

  • ICPlanet

  • Digital Switch Unipolar Switch Open Drain Hall Effect SOT-23W

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TYPE
DESCRIPTION
Category
Sensors, Transducers
Magnetic Sensors - Switches (Solid State)
Mfr
Allegro MicroSystems
Series
Automotive, AEC-Q100
Package
Tape & Reel (TR)
Part Status
Active
Function
Unipolar Switch
Technology
Hall Effect
Polarization
South Pole
Sensing Range
5mT Trip, 0.5mT Release
Test Condition
-40°C ~ 150°C
Voltage - Supply
3V ~ 24V
Current - Supply (Max)
4mA
Current - Output (Max)
25mA
Output Type
Open Drain
Features
-
Operating Temperature
-40°C ~ 150°C (TA)
Mounting Type
Surface Mount
Supplier Device Package
SOT-23W
Package / Case
SOT-23W

FEATURES AND BENEFITS 

▪  AEC-Q100 automotive qualified 

▪  Unipolar switch points 

▪  Resistant to physical stress

▪  Superior temperature stability 

▪  Output short-circuit protection

▪  Operation from unregulated supply 

▪  Reverse-battery protection 

▪  Solid-state reliability

▪  Small package sizes

DESCRIPTION 

The A1120, A1121, A1122, A1123, and A1125 Hall-effect  unipolar switches are extremely temperature-stable and  stress-resistant sensor ICs, especially suited for operation  over extended temperature ranges to 150°C. Superior hightemperature performance is made possible through dynamic  offset cancellation, which reduces the residual offset voltage  normally caused by device overmolding, temperature  dependencies, and thermal stress. 

Each device includes on a single silicon chip a voltage regulator,  Hall-voltage generator, small-signal amplifier, chopper  stabilization, Schmitt trigger, and a short-circuit protected  open-drain output to sink up to 25 mA. 

An on-board regulator permits operation with supply voltages  of 3 to 24 V. The advantage of operating down to 3 V is that  the device can be used in 3 V applications or with additional  external resistance in series with the supply pin for greater  protection against high-voltage transient events. 

For the A1120, A1121, A1122, and A1123, a south pole of  sufficient strength turns the output on. Removal of the magnetic  field turns the output off. The A1125 is complementary, in that  for these devices, a south pole turns the A1125 output off, and  removal of the magnetic field turns the output on. 

Two package styles provide a magnetically optimized package  for most applications. Package type LH is a modified SOT23W,  surface-mount package, while UA is a three-lead ultra-mini  SIP for through-hole mounting. Each package type is lead  (Pb) free (suffix, –T), with a 100% matte-tin-plated leadframe.

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