A1145LLHLT-T Allegro Microsystems Inc, A1145LLHLT-T Datasheet - Page 7

• Manufacturer Part Number: A1145LLHLT-T
• Description: IC SWITCH HALL EFFECT UNI SOT-23
• Manufacturer: Allegro Microsystems Inc
• Type: Unipolar Switchr

Specifications of A1145LLHLT-T

• Sensing Range: 60G Trip, 10G Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 6.9mA
• Output Type: Digital, Open Drain
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 150°C
• Package / Case: SOT-23W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -

A1145
A1146
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 A1145 device switches low after the
I+
0
B–
RP
(A) A1145
, the device output goes high. The
B
HYS
HYS
. This built-in hysteresis
B+
Ultrasensitive Two-Wire Chopper-Stabilized
I
I
CC(H)
Functional Description
CC(L)
allows clean switching of the output even in the presence of
external mechanical vibration and electrical noise. The A1146
device switches with opposite polarity for similar B
values, in comparison to the A1145 (see figure 1).
Unipolar Hall Effect Switches
I+
0
B–
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
(B) A1146
B
HYS
B+
I
I
CC(H)
CC(L)
OP
and B
RP
6