A1335 Datasheet, PDF (1/29 Pages) Allegro MicroSystems – Precision Hall-Effect Angle Sensor IC with I 2C, SPI, and SENT Interfaces

A1335
Precision Hall-Effect Angle Sensor IC
with I ²C, SPI, and SENT Interfaces
FEATURES AND BENEFITS
• 360° contactless high-resolution angle position sensor
• CVH (Circular Vertical Hall) technology
• Available with either a single die or dual independent die
housed within a single package
• Digital output format selectable among SPI, I²C, and
SENT (Single-Edge Nibble Transmission)
• SENT output is SAEJ2716 JAN2010 compliant, with
Allegro proprietary enhanced programmable features
• Customer-programmable SENT tick times, ranging
from 0.5 to 7.9 µs
• SPI interface allows use of multiple independent sensor
ICs for applications requiring redundancy
• Refresh rate: 32 µs, 12-bit resolution
• Wide range of diagnostics enable automotive applications
to achieve ASIL-D compliance
• Programmable via Manchester encoding on the VCC
line, reducing external wiring
• Automotive temperature range: –40°C to 150°C
• AEC-Q100 automotive qualified
• Two types of linearization algorithms offered: harmonic
linearization and segmented linearization
□□Enables off-axis operation
Continued on the next page…
Packages:
Not to scale
Single SoC, 14-pin TSSOP Dual Independent SoCs, 24-pin
(suffix LE)
TSSOP (suffix LE)
DESCRIPTION
TheA1335 is a 360° contactless high-resolution programmable
magnetic angle position sensor IC. It is designed for digital
systems and is capable of communicating via an I²C, SPI, or
SENT interface.
This system-on-chip (SoC) architecture includes a front
end based on Circular Vertical Hall (CVH) technology,
programmable microprocessor-based signal processing, and
features an interface capable of supporting I²C, SPI, and SENT.
Besides providing full-turn angular measurement, the A1335
also provides scaling for angle measurement applications less
than 360^°. It includes on-chip EEPROM technology, capable of
supporting up to 100 read/write cycles, for flexible programming
of calibration parameters.
Digital signal processing functions, including temperature
compensation and gain/offset trim, as well as advanced output
linearization algorithms, provide an extremely accurate and
linear output for both end-of-shaft applications as well as
off‑axis applications.
The A1335 is ideal for automotive applications requiring high-
speed 360° angle measurements, such as: electronic power
steering (EPS), transmission, torsion bar, and other systems
that require accurate measurement of angles. The A1335
linearization schemes were designed with challenging off-axis
applications in mind.
The A1335 is available as a single die in a 14-pin TSSOP, or
dual die in a 24-pin TSSOP. Both packages are lead (Pb) free
with 100% matte-tin leadframe plating.
V+
C_BYP(VCC)
C_BYP(BYP)
VCC (also
programming)
BYP
SENT
SDA/MISO
SCL/SCLK
SA0/CS
SA1/MOSI
ISEL
DGND
AGND
To all internal circuits
Regulator
SENT
Interface
Analog Front End
SOC Die
Multisegment
CVH Element
Diagnostics
Digital
Subsystem
I²C/SPI
Interface
VCC
(Programming)
EEPROM
32-bit
Microprocessor
ADC
Industry-leading linearization
enables off-axis (side-shaft)
operation
A1335-DS
Functional Block Diagram