A1190 ALLEGRO [Allegro MicroSystems], A1190 Datasheet - Page 7

• Manufacturer Part Number: A1190
• Description: Programmable, Chopper-Stabilized, Two Wire Hall-Effect Switches
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A1190, A1192,
and A1193
The A1190 and A1192 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 A1193, the
device output switches high after the magnetic field at the Hall
Figure 1. Alternative switching behaviors are available in the A119x 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 A1190 and A1192
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
Programmable, Chopper-Stabilized,
sensor IC exceeds the operate point threshold, B
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.
RP
, the device output goes low (panel B).
Two Wire Hall-Effect Switches
I+
0
(B) Hysteresis curve for A1193
B–
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+
OP
I
I
. When the
CC(H)
CC(L)
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