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A1121LLHLT-T2

Description
SPECIALTY ANALOG CIRCUIT, SIP3
Categoryaccessories   
File Size321KB,13 Pages
ManufacturerAllegro
Websitehttp://www.allegromicro.com/
Download Datasheet Compare View All

A1121LLHLT-T2 Overview

SPECIALTY ANALOG CIRCUIT, SIP3

A1120, A1121, and A1125
Chopper Stabilized Precision Hall Effect Switches
Features and Benefits
Unipolar switchpoints
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, 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 high-temperature 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 and A1121, 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.
3-pin SIP (suffix UA)
Packages:
3-pin SOT23W (suffix LH)
Not to scale
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.
Functional Block Diagram
VCC
Regulator
To All Subcircuits
Amp
Sample and Hold
Dynamic Offset
Cancellation
Low-Pass
Filter
VOUT
Control
Current Limit
GND
A1120-DS, Rev. 11

A1121LLHLT-T2 Related Products

A1121LLHLT-T2 A1120LLHLT-T2 A1121 A1121ELHLT-T2 A1125 A1120ELHLT-T2
Description SPECIALTY ANALOG CIRCUIT, SIP3 SPECIALTY ANALOG CIRCUIT, SIP3 SPECIALTY ANALOG CIRCUIT, SIP3 SPECIALTY ANALOG CIRCUIT, SIP3 SPECIALTY ANALOG CIRCUIT, SIP3 SPECIALTY ANALOG CIRCUIT, SIP3
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