The APS12625 and APS12626 integrated circuits are dual
ultrasensitive Hall-effect latches optimized for use with ring
magnets. They feature both vertical and planar Hall elements
with sensing axes that are orthogonal to one another, providing
90° of phase separation. This phase separation is inherently
independent of magnet pole spacing and air gap. No target
optimization is required, making them extremely flexible and
easy to use.
For example, the ring magnet pole-pitch can be changed without
having to modify the sensor position or other mechanical design
details. Additionally, XY, ZX, and ZY options are available to
work in almost any orientation to the target. The APS12625
features Speed and Direction outputs, while the APS12626 has
quadrature outputs (Channel A/B).
A unique feature allows the host system to restore the correct
state after power-cycling the device (-P option). This reduces
the potential accumulation of lost counts/pulses when the device
wakes up with one or more sensors in its hysteresis region.
APS12625-6-DS, Rev. 6
MCO-0000340
• Flexible and easy-to-use sensor for motors/encoders
• ISO 26262 / ASIL A functional safety compliance
• 2D magnetic sensing via planar and vertical Hall elements
□ Quadrature independent of magnet pole pitch and air
gap—no target optimization required
□ Works in almost any orientation to the target (XY, ZX,
and ZY options)
• Reduces accumulation of lost counts/pulses
□ System can restore correct state after power-cycling
(-P option)
• Dual outputs of quadrature or speed/direction signals
• High magnetic sensitivity
• Optimized for applications with regulated power rails
□ Operation from 2.8 to 5.5 V
• Automotive grade/qualified per AEC-Q100
□ T
J
up to 175°C
□ Output short-circuit protection
□ Resistant to physical stress
• Small size
2D Hall-Effect Speed and Direction Sensor ICs
PACKAGE
Functional Block Diagram
Not to scale
APS12625
and APS12626
Y Hall
Z Hall
Amp
Dynamic Offset
Cancellation &
Multiplexer
Demultiplexer /
Speed and Direction /
Quadrature Logic
Low-Pass
Filter
To All
Subcircuits
Sample, Hold,
& Averaging
OUTPUT
A
VDD
GND
OUTPUTB
X Hall
POS
Logic
POS
Logic
Power-On
Reset
FEATURES AND BENEFITS DESCRIPTION
5-Pin SOT23-W (Sux LH)
Continued on the next page…
June 8, 2022
• Automotive
□ Power closures/actuators
□ Electronic power steering
□ Seat/window/sunroof motors
□ Trunk/door/liftgate motors
• Industrial motors/encoders
• Garage door openers
TYPICAL APPLICATIONS
• Motorized window
blinds
• White goods
2
-
2D Hall-Effect Speed and Direction Sensor ICs
APS12625 and
APS12626
2
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
RoHS
COMPLIANT
DESCRIPTION (continued)
On a single silicon chip, these devices include: three Hall plates
(one planar and two vertical), a multiplexer, a small-signal amplifier,
chopper stabilization, a Schmitt trigger, and two NMOS output
transistors that can sink up to 10 mA continuously. They operate from
a regulated supply voltage of 2.8 to 5.5 V and have been qualified
beyond the requirements of AEC-Q100 grade 0 for operation up to
175°C junction temperature.
The small geometries of the BiCMOS process allow these devices
to be offered in an ultrasmall package. Package designator “LH”
indicates a modified SOT23-W surface-mount package. This
package is RoHS-compliant and lead (Pb) free, with 100% matte
tin leadframe plating.
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Notes Rating Unit
Forward Supply Voltage V
DD
6 V
Reverse Supply Voltage V
RDD
–0.3 V
Magnetic Flux Density B Unlimited G
Output Off Voltage V
OUT
6 V
Output Current I
OUT
Through short-circuit current-limiting device 45 mA
Maximum Junction Temperature T
J(MAX)
165 °C
For 500 hours 175 °C
Storage Temperature T
stg
–65 to 170 °C
Sensing Axes
A – X and Y axis
B – Z and X axis
C – Z and Y axis
Allegro Iden
er (Device Family)
APS
Opera
ng Temperature Range
L – -40°C to +150°C
Instruc
ons (Packing)
LT – 7-in. reel, 3,000 pieces/reel (LH Only)
LX – 13-in. reel, 10,000 pieces/reel (LH Only)
Package Designa
on
LHA – 5-pin SOT23W Surface Mount
Complete Part Number Format
Device Type
1262
X
Output Type
5 – Pin 1, Speed of target movement
Pin 2, Direc�on of target movement
6 – Pin 1, Output from X or Z Hall channel*
Pin 2, Output from Y or X Hall channel*
* Corresponding output signal depends on selected Sensing Axes
APS 12625
Temperature Coefficient (TC)
A – Flat
F – Ferrite
Power-on State (POS)
_ – POS is HIGH
P – POS is user se able
-
APS 12626
Configura on Op ons
Speed &
Direc
on
Quadrature
SELECTION GUIDE
2D Hall-Effect Speed and Direction Sensor ICs
APS12625 and
APS12626
3
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information
Characteristic Symbol Notes Rating Unit
Package Thermal Resistance R
θJA
Package LH-5 4-layer board based on the JEDEC standard JESD51-7 124 °C/W
* Additional thermal information available on the Allegro website.
20 40 60 80 100 120 140 160 180
Temperature (°C)
Power Dissipation, P
D
(mW)
100
0
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
4-Layer PCB, Package LH-5
(R
θJA
=124ºC/W)
Maximum Power Dissipation versus Ambient Temperature
