A1126LUA-T Allegro Microsystems Inc, A1126LUA-T Datasheet - Page 9

• Manufacturer Part Number: A1126LUA-T
• Description: IC SW HALL EFFECT OMNI 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Series: -r
• Type: Omnipolar Switchr

Specifications of A1126LUA-T

• Sensing Range: ±55G Trip, ±50G Release
• Voltage - Supply: 3 V ~ 24 V
• Current - Supply: 4mA
• Current - Output (max): -
• Output Type: Digital, Open Drain
• Features: Ultra Sensitive
• Operating Temperature: -40°C ~ 150°C
• Package / Case: *
• Lead Free Status / Rohs Status: Compliant

A1126
The output of these devices switches low (turns on) when a
magnetic field perpendicular to the Hall sensor chip exceeds the
operate point threshold, B
is V
up to the short circuit current limit, I
of 30 mA. When the magnetic field is reduced below the release
point, B
ence in the magnetic operate and release points is the hysteresis,
B
Subject to Change Without Notice
HYS
Preliminary Datasheet
OUT(SAT)
, of the device. This built-in hysteresis allows clean switch-
RPx
May 3, 2011
, the device output goes high (turns off). The differ-
. The output transistor is capable of sinking current
OPx
. After turn-on, the output voltage
Figure 1. Switching behavior of omnipolar switches. On the horizontal axis, the
B+ direction indicates increasing south polarity magnetic field strength, and the
B– direction indicates increasing north polarity. This behavior can be exhibited
when using a circuit such as that shown in figure 2.
OM
Chopper-Stabilized Omnipolar Hall-Effect Switch
V+
, which is a minimum
0
B–
Functional Description
B
HYS
0
ing of the output even in the presence of external mechanical
vibration and electrical noise.
In the case of omnipolar switch devices, removal of the magnetic
field results in the device output high (off).
Powering-on the device in the hysteresis range (less than B
and greater than B
The correct state is attained after the first excursion beyond B
or B
RPx
.
B
HYS
RPx
) will allow an indeterminate output state.
B+
V
S
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
V
OUT(SAT)
OPx
OPx
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