A1157LUA-T Allegro Microsystems Inc, A1157LUA-T Datasheet - Page 7

• Manufacturer Part Number: A1157LUA-T
• Description: IC SW HALL EFFECT CHOPPER 3SIP
• Manufacturer: Allegro Microsystems Inc
• Series: -r
• Type: Unipolar Switchr

Specifications of A1157LUA-T

• Sensing Range: 80G Trip, 10G Release
• Voltage - Supply: 3 V ~ 24 V
• Current - Supply: 5mA
• Current - Output (max): -
• Output Type: 2-Wire Serial
• Features: -
• Operating Temperature: 40°C ~ 150°C
• Package / Case: *
• Magnetic Type: Unipolar
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 3.3/5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Mag Sensor Operate Point (g): 80Gs
• Mag Sensor Release Point (g): 10Gs
• Mag Sensor Hysteresis(g): 30Gs
• Package Type: SIP
• Pin Count: 3
• Mounting: Through Hole
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 620-1409

A1150, A1152, A1153, A1155,
The A1150, A1152, A1155, and A1157 output, I
after the magnetic field at the Hall sensor IC exceeds the oper-
ate point threshold, B
below the release point threshold, B
high. This is shown in figure 1, panel A.
In the case of the reverse output polarity, as in the A1153, A1156,
and A1158, the device output switches high after the magnetic
Figure 1. Alternative switching behaviors are available in the A115x 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).
A1156, A1157, and A1158
(A) Hysteresis curve for A1150, A1152, A1155, and A1157
I+
0
B–
OP
. When the magnetic field is reduced to
B
HYS
RP
, the device output goes
B+
CC
I
I
, switches low
CC(H)
CC(L)
Functional Description
field at the Hall sensor IC exceeds the operate point threshold,
B
point threshold, B
The difference between the magnetic operate and release points
is called the hysteresis of the device, B
esis allows clean switching of the output even in the presence of
external mechanical vibration and electrical noise.
OP
. When the magnetic field is reduced to below the release
Chopper-Stabilized, Two Wire
(B) Hysteresis curve for A1153, A1156, and A1158
RP
I+
0
, the device output goes low (panel B).
B–
Hall-Effect Switches
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
B
HYS
HYS
. This built-in hyster-
B+
I
I
CC(H)
CC(L)
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