A1140LUA Allegro Microsystems Inc, A1140LUA Datasheet - Page 7

• Manufacturer Part Number: A1140LUA
• Description: IC SWITCH HALL EFFECT UNI 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Unipolar Switchr

Specifications of A1140LUA

• Sensing Range: 110G Trip, 45G Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 5mA
• Output Type: Digital, Open Drain
• Features: Regulated Voltage
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 3-SIP
• 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): 110Gs
• Mag Sensor Release Point (g): 45Gs
• Mag Sensor Hysteresis(g): 15Gs
• Package Type: Ultra Mini SIP
• Pin Count: 3
• Mounting: Through Hole
• 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

A1140, A1141,
A1142, and A1143
Operation
The output, I
after the magnetic field at the Hall sensor exceeds the operate
point threshold, B
below the release point threshold, B
high. The 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).
CC
, of the A1140 and A1142 devices switch low
I+
0
OP
B–
. When the magnetic field is reduced to
(A) A1140, A1142
B
HYS
RP
, the device output goes
HYS
B+
. This built-
I
I
CC(H)
Functional Description
CC(L)
Sensitive Two-Wire Chopper-Stabilized
in hysteresis allows clean switching of the output even in the
presence of external mechanical vibration and electrical noise.
The A1141 and A1143 devices switch with opposite polarity for
similar B
A1142 (see figure 1).
Unipolar Hall Effect Switches
OP
and B
I+
0
RP
B–
values, in comparison to the A1140 and
(B) A1141, A1143
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
B
HYS
B+
I
I
CC(H)
CC(L)
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