-
2
APS12625
and APS12626
2D Hall-Effect
Speed and Direction Sensor ICs
DESCRIPTION
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.
Continued on the next page…
FEATURES AND BENEFITS
• Flexible and easy-to-use sensor for motors/encoders
• ISO 26262:2011 / 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
• Automotive
• Motorized window
□
Power closures/actuators
blinds
□
Electronic power steering
• White goods
□
Seat/window/sunroof motors
□
Trunk/door/liftgate motors
• Industrial motors/encoders
• Garage door openers
TYPICAL APPLICATIONS
PACKAGE
5-Pin SOT23-W (Suffix LH)
Not to scale
VDD
Power-On
Reset
To All
Subcircuits
POS
Logic
OUTPUTA
Dynamic Offset
Cancellation &
Multiplexer
X Hall
Y Hall
Z Hall
Low-Pass
Filter
Amp
Sample, Hold,
& Averaging
Demultiplexer /
Speed and Direction /
Quadrature Logic
POS
Logic
OUTPUTB
GND
Functional Block Diagram
APS12625-6-DS, Rev. 1
MCO-0000340
December 19, 2018
APS12625 and
APS12626
DESCRIPTION
(continued)
2D Hall-Effect Speed and Direction Sensor ICs
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 which 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.
SELECTION GUIDE
Complete Part Number Format
Allegro Iden er (Device Family)
APS
Device Type
1262 X
Output Type
5 – Pin 1, Direc on of target movement
Pin 2, Speed of target movement
6 – Pin 1, Output from X or Y Hall channel*
Pin 2, Output from Y or Z Hall channel*
Configura on Op ons
Speed &
Direc on
Quadrature
APS
APS
12625
12626
-
* Corresponding output signal depends on selected Sensing Axes
Power-on State (POS)
_ – POS is HIGH
P – POS is user se able
Temperature Coefficient (TC)
A – Flat
F – Ferrite
Sensing Axes
RoHS
A – X and Y axis
COMPLIANT
B – Z and X axis
C – Z and Y axis
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
Opera ng Temperature Range
L – -40°C to +150°C
ABSOLUTE MAXIMUM RATINGS
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Magnetic Flux Density
Output Off Voltage
Output Current
Maximum Junction Temperature
Storage Temperature
Symbol
V
DD
V
RDD
B
V
OUT
I
OUT
T
J(MAX)
T
stg
Through short-circuit current-limiting device
For 500 hours
Notes
Rating
6
–0.3
Unlimited
6
45
165
175
–65 to 170
Unit
V
V
G
V
mA
°C
°C
°C
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2
APS12625 and
APS12626
2D Hall-Effect Speed and Direction Sensor ICs
THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information
Characteristic
Package Thermal Resistance
Symbol
R
θJA
Notes
Package LH-5 4-layer board based on the JEDEC standard JESD51-7
Rating
124
Unit
°C/W
* Additional thermal information available on the Allegro website.
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
Power Dissipation, P
D
(mW)
4-L
ay
er
P
(R CB,
θJ
P
A
=
12 ack
4ºC ag
/W e LH
)
-5
20
40
60
80
100
120
140
160
180
Temperature (°C)
Maximum Power Dissipation versus Ambient Temperature
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
3
APS12625 and
APS12626
2D Hall-Effect Speed and Direction Sensor ICs
PINOUT DIAGRAMS, TERMINAL LIST, AND OUTPUT OPTION TABLES
∆z
GND
GND
4
VDD
3
Vertical Hall (X)
Vertical Hall (Y)
Planar Hall (Z)
1
2
OUTPUTB
∆y
5
∆x
OUTPUTA
Package LH, 5-Pin SOT23-W
Terminal List Table
Number
1
2
3
4
5
[1]
Symbol
OUTPUTA
OUTPUTB
VDD
GND
GND
Description
See output option table
See output option table
Connects power supply to chip
Ground
[1]
Ground
[1]
Only one GND connection is required; other GND pin can float or also be
tied to GND.
Output Option Table
Device
Order Option
[2]
A
APS12625
B
C
A
APS12626
B
C
[2]
Sensing
Axes
XY
ZX
ZY
XY
ZX
ZY
OUTPUT A (Pin 1)
OUTPUTB (Pin 2)
Speed of target movement
X channel output
Z channel output
Z channel output
Direction of target movement
Y channel output
X channel output
Y channel output
See Selection Guide.
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
4
APS12625 and
APS12626
2D Hall-Effect Speed and Direction Sensor ICs
ELECTRICAL CHARACTERISTICS
:
Valid over full operating voltage and ambient temperature range T
A
= –40°C to 150°C,
unless otherwise specified
Characteristics
Supply Voltage
Output Leakage Current
Output On Voltage
Output Off Voltage
Supply Current
Output Current
Output Sink Current
Output Short-Circuit Current Limit
Output Rise Time
[2][3]
Output Fall Time
[2][3]
Power-On Time
Power-On State External Input
Power-On State, Output A and B
Delay Between Direction and
Speed Pin Update
Speed Pin Input Low Level
Channel A / B Input Low Level
Speed Pin Input High Level
Channel A / B Input High Level
[1]
[2]
Symbol
V
DD
I
OUTOFF
V
OUT(SAT)
V
OUT(OFF)
I
DD
I
OUT
I
OUTPUT(SINK)
I
OM
t
r
t
f
t
ON
t
POS_input
POS
t
dir-to-speed
V
IN(LOW)
V
IN(HIGH)
B < B
RP
Test Conditions
Operating, T
J
≤ T
J
(max)
I
OUT
= 2 mA, B > B
OP
OUTA and OUTB are open-drain;
application sets output off voltage
Value used during characterization
V
DD
= 5.5 V, T
J
≤ T
J
(max)
C
LOAD
= 20 pF, R
LOAD
= 820 Ω
C
LOAD
= 20 pF, R
LOAD
= 820 Ω
Both outputs, APS12625
Both outputs, APS12626
Hold time for external POS setting signal,
-P option only; see Figure 10
Min.
2.8
–
–
–
–
–
–
15
–
–
–
–
100
Typ.
[1]
–
–
180
–
3
5
–
–
0.2
0.1
150
50
–
High
Max.
5.5
10
500
5.5
4.5
–
10
45
–
–
300
100
–
Unit
V
µA
mV
V
mA
mA
mA
mA
µs
µs
µs
µs
µs
–
Only valid for APS12625
For APS12625 -P option
For APS12626 -P option
For APS12625 -P option
For APS12626 -P option
2.8
–
2.0
4.0
–
–
8
0.8
–
µs
V
V
Typical data are at T
A
= 25°C and V
DD
= 4 V.
Power-on time, rise time, and fall time are guaranteed through device characterization.
[3]
C
LOAD
= oscilloscope probe capacitance.
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
5
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