A1262 Datasheet, PDF (1/17 Pages) Allegro MicroSystems – 2D, Dual-Channel, Ultrasensitive Hall-Effect Latch

A1262
2D, Dual-Channel, Ultrasensitive Hall-Effect Latch
FEATURES AND BENEFITS
• 2D magnetic sensing via planar and vertical Hall elements
• Phase separation between the two channels is inherently 90°
• Dual-channel output allows independent use of Z-axis
planar Hall in conjunction with vertical Hall:
□□Y-axis (default option)
□□X-axis (with -X option)
• High sensitivity, B_OP typically 17 G
• Automotive grade
□□AEC-Q100 qualified for use in automotive applications
□□Output short-circuit protection
□□Resistant to physical stress
□□Reverse-battery protection
□□Solid-state reliability
□□Superior temperature stability
□□Supply voltage Zener clamp
• Small size
PACKAGES:
5-Pin SOT23W (Suffix LH)
Not to scale
DESCRIPTION
The A1262 integrated circuit is an ultrasensitive Hall-effect
latch. It features operation with traditional planar magnetic field
direction as well as vertical. The dual operation of the planar
and vertical Hall elements allows the end user to achieve 90°
of phase separation that is inherently independent of magnetic
pole spacing. The quadrature outputs of the A1262 allow
rotation direction to be determined, such as when sensing a
rotating ring-magnet target.
The A1262 is available in two options that allow flexibility in
end-system magnetic design. Both options feature a planar Hall
plate that is sensitive to magnetic fields perpendicular to the
face of the package (Z). The primary option features a vertical
Hall plate that is sensitive to magnetic fields parallel with the
face of the package across the leaded edges of the package (Y).
The -X option features a vertical Hall plate that is sensitive to
magnetic fields parallel with the face of the package across
the leadless edges of the package (X), resulting in lower total
effective air gap.
On a single silicon chip, the device includes: two Hall plates (one
planar and one vertical), a multiplexer, a small-signal amplifier,
chopper stabilization, a Schmitt trigger, and two short-circuit
protected NMOS output transistors to sink up to 20 mA. The
A1262 features circuitry that provides automotive ruggedness
and allows operation from 4 to 24 V over a temperature range
Continued on the next page…
VDD
X/Y Hall
Z Hall
Regulator
To All
Subcircuits
Amp
Low-Pass
Filter
Sample, Hold
& Averaging
Current
Limit
Current
Limit
OUTPUTA
OUTPUTB
A1262-DS, Rev. 1
GND
Functional Block Diagram