|
|
PDF A1262 Data sheet ( Hoja de datos )
| Número de pieza | A1262 | |
| Descripción | Ultrasensitive Hall-Effect Latch | |
| Fabricantes | Allegro | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de A1262 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
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, BOP 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
Functional Block Diagram
GND
1 page  
A1262
2D, Dual-Channel, Ultrasensitive Hall-Effect Latch
MAGNETIC CHARACTERISTICS: Valid over full operating voltage and temperature ranges, unless otherwise specified.
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Operate Point 5
BOP
Release Point 5
BRP
Hysteresis
BHYS
Symmetry: Channel A, Channel B,
BOP(A) + BRP(A), BOP(B) + BRP(B)
BSYM(A),
BSYM(B)
Operate Symmetry: BOP(A) – BOP(B)
BSYM(AB,OP)
Release Symmetry: BRP(A) – BRP(B)
BSYM(AB,RP)
4 1 G (gauss) = 0.1 mT (millitesla)
5 Applicable to all directions (X/Y and Z).
BOP – BRP
1 17
–40 –17
15 34
–35 –
–25 –
–25 –
40
–1
68
35
25
25
Unit 4
G
G
G
G
G
G
N
S
N
S
N
S
Z
The A1262 output is turned on when presented with a south polarity magnetic field beyond BOP in the orientations illustrated above.
The X-axis field response is only applicable to the -X option; the Y-axis field response is only applicable to the default option.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
A1262
2D, Dual-Channel, Ultrasensitive Hall-Effect Latch
two channels will inherently be in quadrature, irrespective of the
ring-magnet pole spacing.
Figure 2 above shows a ring magnet optimized for the E1-to-E2
spacing of a dual-planar sensor, resulting in quadrature, or 90
degrees phase separation between channels. This same target
also results in quadrature for the 2D sensing A1262. However
when a different ring magnet is used which is not optimized for
the E1-to-E2 spacing, the dual-planar sensor exhibits diminished
phase separation, making signal processing the outputs into speed
and direction less robust. Using a different ring-magnet geom-
etry has no effect on the A1262, and the two channels remain in
quadrature (see Figure 3 below).
The relationship of the various signals and the typical system tim-
ing is shown in Figure 4.
Dual-Planar
Sensor
A1262
Figure 3: Ring magnet not optimized for a dual-planar Hall-effect sensor resulting in signifi-
cantly reduced output phase separation, however still results in quadrature for the A1262.
Figure 4: Typical System Timing
The Planar (P) and Vertical (V) signals represent the magnetic input signal, which is converted to the device outputs,
OUTPUTA and OUTPUTB, respectively. While the A1262 does not process the signals into Speed and Direction, these
could be determined by the user based on the individual output signals.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet A1262.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| A1260 | Chopper Stabilized Precision Vertical Hall-Effect Latch |  Allegro MicroSystems |
| A1262 | PNP Transistor - 2SA1262 |  SavantIC |
| A1262 | Ultrasensitive Hall-Effect Latch | Allegro |
| A1263 | PNP Transistor - 2SA1263 |  Toshiba Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |