Low Noise, High Precision, Programmable Linear Hall Effect Sensor IC

With Advanced Temperature Compensation

And High Bandwidth (120 kHz) Analog Output

A1363

2

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Selection Guide

Part Number

(mV/G)

A1363LKTTN-1-T

4000 pieces per 13-in. reel

SENS_COARSE 00: 0.6 to 1.3

A1363LKTTN-2-T

4000 pieces per 13-in. reel

SENS_COARSE 01: 1.3 to 2.9

A1363LKTTN-5-T

4000 pieces per 13-in. reel

SENS_COARSE 10: 2.9 to 6.4

A1363LKTTN-10-T

4000 pieces per 13-in. reel

SENS_COARSE 11: 6.4 to 14

1

Contact Allegro for additional packing options

2

Allegro recommends against changing Coarse Sensitivity settings when programming devices that will be used in production. Each

A1363 has been Factory Temperature Compensated at a specific Sensitivity Range and changing coarse bits setting could cause sen-

output stage, and a proprietary, high bandwidth dynamic offset

cancellation technique. These advances in Hall-effect technology

work together to provide an industry leading sensing resolution at

the full 120 kHz bandwidth. Broken ground wire detection as well as

user-selectable output voltage clamps also are built into this device,

for high reliability in automotive applications.

Device parameters are specified across an extended ambient

temperature range: –40°C to 150°C. The A1363 sensor IC is

provided in an extremely thin case (1 mm thick), 4-pin SIP (single

in-line package, suffix KT) that is lead (Pb) free, with 100% matte

tin lead frame plating.

• Open circuit detection on ground pin (broken wire)

• Selectable sensitivity range between 0.6 and 14 mV/G through

use of coarse sensitivity programming bits

• Ratiometric sensitivity, quiescent voltage output, and clamps

for interfacing with application A-to-D converter (ADC)

• Precise recoverability after temperature cycling

• Output voltage clamps provide short circuit diagnostic

capabilities

• Wide ambient temperature range: –40°C to 150°C

• Immune to mechanical stress

• Extremely thin package: 1 mm case thickness

• AEC Q-100 automotive qualified

Features and Benefits (continued)

Description (continued)

Table of Contents

Specifications

2

Pin-out Diagram and Terminal List

3

Thermal Characteristics

4

Characteristic Performance Data

9

Characteristic Definitions

13

Functional Description

18

Programming Sensitivity and Quiescent

Voltage Output

18

Coarse Sensitivity

18

Memory Locking Mechanisms

18

Power-On Reset (POR) and Undervoltage

Lock-Out (UVLO) Operation

19

Detecting Broken Ground Wire

20

Chopper Stabilization Technique

21

Programming Serial Interface

22

Transaction Types

22

Writing the Access Code

22

Writing to Volatile Memory

22

Writing to EEPROM

23

Reading from EEPROM or Volatile Memory

23

Error Checking

23

Serial Interface Reference

24

Serial Interface Message Structure

25

VCC Levels During Manchester Communication 25

EEPROM Cell Organization

27

EEPROM Error Checking and Correction (ECC)

28

Detecting ECC Error

28

Package Drawing

29