A1148LLHLT Allegro Microsystems Inc, A1148LLHLT Datasheet - Page 7
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A1148LLHLT
Manufacturer Part Number
A1148LLHLT
Description
IC SWITCH HALL EFFECT UNI SOT-23
Manufacturer
Allegro Microsystems Inc
Type
Unipolar Switchr
Datasheet
1.A1147ELHLT.pdf
(13 pages)
Specifications of A1148LLHLT
Sensing Range
80G Trip, 10G Release
Voltage - Supply
3.5 V ~ 24 V
Current - Supply
5mA
Output Type
Digital, Open Collector
Features
Regulated Voltage
Operating Temperature
-40°C ~ 150°C
Package / Case
SOT-23W
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Output (max)
-
A1147
A1148
Operation
The output, I
magnetic field at the Hall element exceeds the operate point
threshold, B
release point threshold, B
differences between the magnetic operate and release point is
called the hysteresis of the device, B
Figure 1. Alternative switching behaviors are available in the A114x device family. On the horizontal axis, the B+ direction indicates
increasing south polarity magnetic field strength, and the B– direction indicates decreasing south polarity field strength (including the
case of increasing north polarity).
OP
CC
and
. When the magnetic field is reduced to below the
, of the A1147 device switches low after the
I+
0
B–
RP
(A) A1147
, the device output goes high. The
B
HYS
Chopper-Stabilized Unipolar Hall Effect Switches
HYS
. This built-in hysteresis
B+
I
I
CC(H)
Functional Description
CC(L)
Low Current Ultrasensitive Two-Wire
allows clean switching of the output even in the presence of
external mechanical vibration and electrical noise. The A1148
device switches with opposite polarity for similar B
values, in comparison to the A1147 (see figure 1).
I+
0
B–
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
(B) A1148
B
HYS
B+
I
I
CC(H)
CC(L)
OP
and B
RP
6