A1244 ALLEGRO [Allegro MicroSystems], A1244 Datasheet - Page 7

• Manufacturer Part Number: A1244
• Description: Chopper-Stabilized, Two Wire Hall-Effect Latch
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A1244
The A1244 output, I
at the Hall sensor IC exceeds the operate point threshold, B
When the magnetic field is reduced to below the release point
threshold, B
figure 1.
RP
, the device output goes low. This is shown in
CC
, switches high after the magnetic field
Figure 1. Hysteresis for the A1244. On the horizontal axis, the B+ direc-
tion indicates increasing south polarity magnetic field strength, and the
B– direction indicates decreasing south polarity field strength (including
the case of increasing north polarity).
Functional Description
I+
0
B–
OP
.
B
HYS
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
B+
I
I
CC(H)
CC(L)
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Hall-Effect Latch
HYS
. This built-in hyster-
7