A3150JUA Allegro MicroSystems, Inc., A3150JUA Datasheet - Page 7

• Manufacturer Part Number: A3150JUA
• Description: Programmable, Chopper- Stabilized, Hall-effect Switch
• Manufacturer: Allegro MicroSystems, Inc.

Address Determination. The operate point is adjust-
able in 64 increments. With the appropriate target or gear*
in position, the 64 switch points are sequentially selected
(figure 2) until the required operate point is reached. Note
that the difference between the operate point and the
release point (hysteresis) is a constant for all addresses.
Set-Point Programming. After the desired set-point
address is determined (0 through 63), each bit of the
equivalent binary address is programmed individually. For
example, as illustrated in figure 3, to program address code
5 (binary 000101), bits 1 and 3 need to be programmed.
Each bit is programmed during the
wide V
Lock Programming. After the desired set point is
programmed, the program lock is then activated (figure 4)
to prevent further programming of the device.
* In application, the terms “gear” and “target” are often
interchanged. However, “gear” is preferred when motion
is transferred.
V
V
V
PP
PH
PL
0
www.allegromicro.com
PP
pulse and is not reversible.
t
d(1)
V
V
V
PH
PP
PL
0
PROGRAM ENABLE
t
d(1)
t
d(1)
PROGRAM ENABLE
t
d(1)
Figure 3 — Set-point programming
Figure 4 — Lock programming
t
d(0)
BIT 3 PROGRAM
ADDRESS 4
(000100)
t
d(0)
t
dP
V
V
PH
PL
0
PROGRAMMABLE, CHOPPER-
Figure 2 — Address determination
STABILIZED, PRECISION,
LOCK PROGRAM
(65 PULSES)
HALL-EFFECT SWITCH
t
d(1)
PROGRAM ENABLE
t
dP
Dwg. WH-016
3150
t
d(0)
Dwg. WH-014
Dwg. WH-015