A1145LLHLT Allegro Microsystems Inc, A1145LLHLT Datasheet - Page 6

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

Specifications of A1145LLHLT

• 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
• Magnetic Type: Unipolar
• Operating Supply Voltage (min): 3.5V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Mag Sensor Operate Point (g): 60Gs
• Mag Sensor Release Point (g): 10Gs
• Mag Sensor Hysteresis(g): 15Gs
• Package Type: SOT-23W
• Pin Count: 3
• Mounting: Surface Mount
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output (max): -
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant

A1145
A1146
Operation
The output, I
netic field at the Hall sensor exceeds the operate point threshold,
B
point threshold, B
ences 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
. When the magnetic field is reduced to below the release
CC
and
, of the A1145 device switches low after the mag-
I+
0
RP
B–
, the device output goes high. The differ-
(A) A1145
HYS
B
HYS
. This built-in hysteresis allows
B+
Ultrasensitive Two-Wire Chopper-Stabilized
I
I
CC(H)
Functional Description
CC(L)
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
in comparison to the A1145 (see figure 1).
Unipolar Hall Effect Switches
I+
0
B–
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
(B) A1146
B
HYS
OP
B+
and B
I
I
CC(H)
CC(L)
RP
values,
6