A1334 datasheet(2/20 Pages) ALLEGRO

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A1334A-DS, Rev. 6

Precision Hall-Effect Angle Sensor IC

A1334

The A1334 is a 360° angle sensor IC that provides contactless

high-resolutionangularpositioninformationbasedonmagnetic

Circular Vertical Hall (CVH) technology. It has a system-on-

chip (SoC) architecture that includes: a CVH front end, digital

signal processing, and a digital (SPI) output. The A1334 is

ideal for automotive applications requiring high-speed 0° to

360° angle measurements, such as electronic power steering

(EPS) and throttle systems.

The A1334 supports a Low RPM mode for slower rate appli-

cations and a High RPM mode for high-speed applications.

High RPM mode is for applications that require higher refresh

rates to minimize error due to latency. Low RPM mode is for

applications that require higher resolution operating at lower

angular velocities.

As part of its signal processing functions, the A1334 includes

automotive-grade temperature compensation to provide

accurate output over the full operating temperature and voltage

ranges. The A1334 also includes EEPROM technology for

end-of-line calibration.

The A1334 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.

Packages:

Not to scale

A1334 Functional Block Diagram

A1334 in Electronic Power Steering (EPS)

Application

Multisegment

CVH Element

Analog Front End

To all internal circuits

Bandpass

Filter

Digital Processing

Temperature

Compensation

Internal Calibration

Zero Angle

Data

Registers

EEPROM

Calibration

Parameters

SPI

Interface

Diagnostics

BYP(1)

SoC die 1

SoC die 2 (optional)

VCC(1)

MOSI(1)

SCLK(1)

MISO(1)

GND(1)

xxx2

ADC

BIAS(1)

CS(1)

(Programming)

Pin number parentheses refer to chip in dual SoC variant

Control unit

Rack

Motor

Steering

sensor

Single SoC

14-pin TSSOP (LE package)

Dual Independent SoCs

24-pin TSSOP (LE package)

• Automotive AEC-Q100 qualified

• Contactless 0° to 360° angle sensor IC, for angular

position, rotational speed, and direction measurement

• Available with either a single die or dual independent die

housed within a single package

• Circular Vertical Hall (CVH) technology provides a

single-channel sensor system, with air-gap independence

• 12-bit resolution possible in low RPM mode, 10-bit

resolution in high RPM mode

• Angle Refresh Rate (output rate) configurable between

25 and 3200 µs through EEPROM programming

• Capable of sensing magnet rotational speeds in excess of

7600 rpm

• SPI interface allows use of multiple independent sensors

for applications requiring redundancy

• EEPROM programmable angle reference (0°) position

and rotation direction (CW or CCW)

• Absolute maximum VCC of 26.5 V for automotive

battery-powered applications

FEATURES AND BENEFITS

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December 5, 2016

A1334 Datasheet(PDF) 2 Page - Allegro MicroSystems

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