A31316 datasheet(3/61 Pages) ALLEGRO

3 / 61 page

3D Magnetic Position Sensor IC

A31316

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Table of Contents

Features and Benefits

............................................................... 1

Description

............................................................................ 1

Packages

.............................................................................. 1

Selection Guide

...................................................................... 2

Absolute Maximum Ratings

........................................................ 4

Thermal Characteristics

............................................................ 4

Functional Block Diagram

.......................................................... 5

Pinout Diagram Terminal and Capacitor Lists

................................... 6

Axis Definitions

....................................................................... 6

Application Circuit

.................................................................... 6

Operating Characteristics

.......................................................... 7

Performance Characteristics

....................................................... 8

Interface Characteristics

.......................................................... 10

Functional Description

............................................................ 13

Typical Application Information

............................................... 13

Temperature Output

............................................................ 13

Signal Path

...................................................................... 15

1-D Signal Path

................................................................. 15

Factory Channel A / Channel B Input Selection

........................ 15

Factory Range Selection

.................................................. 15

Factory Trimming

............................................................ 15

Customer Controllable Data Path

........................................ 15

Customer Trimming

............................................................ 15

Low-Pass filter

............................................................... 15

Sensor Output During Low-Pass Filter Initialization

................... 16

Factory Correction

.......................................................... 16

Orthogonality Correction

................................................... 16

Polarity, Offset, Sensitivity, and Temperature Calibration

............ 16

Polarity Correction

.......................................................... 17

Sensitivity Adjustment

...................................................... 17

Sensitivity Correction Over Temperature

................................ 17

Customer Offset Correction

............................................... 17

Customer Offset Correction Over Temperature

........................ 17

Hysteresis Filter

............................................................. 18

Direct Output Register

..................................................... 18

ATAN Input Selection

....................................................... 18

Pre-gain Angle Offset Correction

......................................... 19

Angle Gain Correction

...................................................... 19

Post Gain Angle Offset Correction

....................................... 20

Angle Sign (Rotation Direction)

........................................... 21

Linearization and Binning

.................................................. 21

Linearization / Binning Mode Selection

.................................. 21

Fixed Segment Linearization (Lin_mode 0)

............................ 22

Fixed Segment Binning (lin_mode 1)

.................................... 22

Variable Segment Linearization (lin_mode 2)

.......................... 23

Variable Segment Binning (lin_mode 3)

................................. 23

Linearization/Binning Parameter Storage

............................... 23

Number of Linearization / Binning Points

............................... 25

Binning Mode Hysteresis

.................................................. 25

Output Clamps

.................................................................. 25

Output Protocols

................................................................... 26

PWM Output Mode

............................................................. 26

PWM Sampling Time

........................................................... 26

SENT Output Mode

............................................................ 27

Message Structure

............................................................. 27

SENT Sampling Time

.......................................................... 28

SENT Output Rate

............................................................. 28

Optional SENT Slow Serial Output Protocol

............................... 29

Data Nibble Format

............................................................ 30

SENT CRC

...................................................................... 31

SENT Serial Message 6-Bit CRC

............................................ 31

SENT Message Frame Definitions

.......................................... 33

Error Indicators / Specific Messages / Initialization

Message in SENT Output Codes

.......................................... 34

SAE J2716 SENT

.............................................................. 34

SENT Initialization Code Selection

.......................................... 34

Output Pin Drive Strength Options

.......................................... 35

Output Pin Fall Time Selection

........................................... 35

Push-Pull Output Setting for SENT and PWM Rising Edge

......... 36

Programming Protocol

............................................................ 37

Physical Layer

................................................................... 37

Settings Controlling the Manchester Communication

.................... 37

Serial Interface Message Structure

...................................... 38

Manchester Unlocking – SENT/PWM Mode via OVD

................ 39

Manchester Unlocking – SENT/PWM Mode via Triggering Pulses

. 39

Manchester Communication CRC

.......................................... 39

EEPROM Lock

.................................................................. 39

Analog Check Failure (ACF)

.................................................. 40

Angle Outside Clamp (AOC)

.................................................. 40

EEPROM Margin Checking

................................................... 40

Error Flag Registers

............................................................ 40

Temperature Error (TSE)

...................................................... 40

Saturation Flag (SAT)

.......................................................... 40

Oscillator Frequency Error (OFE)

............................................ 41

Signal Processing Logic Failure (SLF)

...................................... 41

Signal Radius Out of Range (SSR)

.......................................... 41

Power-On Reset (POR)

....................................................... 42

EEPROM Multiple Bit Error (EUE) and EEPROM

Single Bit Error (ESE)

........................................................ 42

Shadow Parity Error (SPE)

................................................... 42

Undervoltage Detection (UVD)

............................................... 42

Overvoltage Detection (OVD)

................................................ 43

SENT Output Error Reporting

................................................ 43

PWM Output Error Reporting

................................................. 43

Broken Wire Detection

......................................................... 44

Logic Built-In Self-Test (LBIST)

.............................................. 44

Diagnostic Setting and Clearing

................................................. 46

Memory Access

.................................................................... 46

Shadow Memory Read and Write Transactions

........................... 46

Package Outline Drawing

........................................................ 60

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