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A1365LKTTN-1-T Datasheet(PDF) 2 Page - Allegro MicroSystems

Part No. A1365LKTTN-1-T
Description  Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1365LKTTN-1-T Datasheet(HTML) 2 Page - Allegro MicroSystems

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Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
With High-Bandwidth (120 kHz) Analog Output and Integrated Fault Comparator
A1365
2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
the supply voltage, VCC. The device sensitivity is adjustable within
the range of 0.6 to 14 mV/G.
The A1365 incorporates a highly sensitive Hall element with a
BiCMOS interface integrated circuit that employs temperature-
compensation circuitry to reduce the intrinsic sensitivity and offset
driftoftheHallelement.TheICalsoincludesasmall-signalhigh-gain
amplifier, a clamped low-impedance output stage, and a proprietary
high-bandwidth dynamic offset cancellation technique.
Devicespecificationsapplyacrossanextendedambienttemperature
range: –40°C to 150°C. The A1365 sensor IC is provided in an
extremely thin case (1 mm thick), 4-pin SIP (single inline package,
suffix KT) that is lead (Pb) free, with 100% matte-tin leadframe
plating.Thethinpackageallowsforbettermagneticcouplingbecause
the smaller the air gap in the core is, the higher the coupling from
current to magnetic field will be.
• Selectable sensitivity range between 0.6 and 14 mV/G through
use of coarse sensitivity program bits
• Ratiometric sensitivity, quiescent voltage output, and
clamps enable simple interface with application A-to-D
converter (ADC)
• Output voltage clamps provide short-circuit diagnostic
capabilities
• Open-circuit detection on ground pin (broken wire)
• Undervoltage lockout for VCC below specification
• Wide ambient temperature range: –40°C to 150°C
FEATURES AND BENEFITS (CONTINUED)
Selection Guide
Part Number
Package
Packing1
Sensitivity Range2
(mV/G)
A1365LKTTN-1-T
4-pin SIP
4000 pieces per 13-in. reel
0.6 to 1.3
A1365LKTTN-2-T
4-pin SIP
4000 pieces per 13-in. reel
1.3 to 2.9
A1365LKTTN-5-T
4-pin SIP
4000 pieces per 13-in. reel
2.9 to 6.4
A1365LKTTN-10-T
4-pin SIP
4000 pieces per 13-in. reel
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 A1365 has been factory temperature compensated at a specific sensitivity range, and changing the coarse bits setting could
cause sensitivity drift through temperature range (ΔSensTC) to exceed specified limits.
DESCRIPTION (CONTINUED)
Specifications
3
Absolute Maximum Ratings
3
Thermal Characteristics
3
Pinout Diagram and Terminal List Table
4
Operating Characteristics
5
Characteristic Performance Data
9
Characteristic Definitions
13
Functional Description
19
Programming Sensitivity and Quiescent
Voltage Output
19
Coarse Sensitivity
19
Memory-Locking Mechanisms
19
Power-On Reset (POR) and Undervoltage
Lockout (UVLO) Operation
20
Detecting Broken Ground Wire
21
Over Magnet Field Fault
22
Programming Serial Interface
24
Transaction Types
24
Writing the Access Code
24
Writing to Volatile Memory
24
Writing to EEPROM
25
Reading from EEPROM or Volatile Memory
25
Error Checking
25
Serial Interface Reference
26
Serial Interface Message Structure
27
VCC Levels During Manchester Communication
27
Shadow Mode
28
EEPROM Margining
29
EEPROM Cell Organization
30
EEPROM Error Checking and Correction (ECC)
30
Detecting ECC Error
30
Package Outline Drawing
31
Table of Contents


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