A1157LLHLT-T Allegro Microsystems Inc, A1157LLHLT-T Datasheet - Page 7

• Manufacturer Part Number: A1157LLHLT-T
• Description: IC SW HALL EFFECT CHOPPER SOT23W
• Manufacturer: Allegro Microsystems Inc
• Series: -r
• Type: Unipolar Switchr

Specifications of A1157LLHLT-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: TO-236-3, SC-59, SOT-23-3
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 620-1417-2

A1152, A1153,
A1155, and A1156
The A1152 and A1155 output, I
netic field at the Hall sensor IC exceeds the operate point thresh-
old, B
point threshold, B
in figure 1, panel A.
In the case of the reverse output polarity, as in the A1153 and
A1156, the device output switches high after the magnetic field
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).
OP
. When the magnetic field is reduced to below the release
(A) Hysteresis curve for A1152, and A1155
I+
RP
0
B–
, the device output goes high. This is shown
B
CC
HYS
, switches low after the mag-
B+
I
I
CC(H)
CC(L)
Functional Description
at the Hall sensor IC exceeds the operate point threshold, B
When the magnetic field is reduced to below the release 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.
Chopper-Stabilized, Two Wire
RP
, the device output goes low (panel B).
(B) Hysteresis curve for A1153 and A1156
I+
0
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)
OP
.
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