A3423LLTR-T

A3423LLTR-T Datasheet

A3423

Part	Datasheet
A3423LLTR-T	A3423LLTR-T (pdf)

Related Parts	Information
A3423EK-T	A3423EK-T
A3423LK-T	A3423LK-T
A3423ELTR-T	A3423ELTR-T

PDF Datasheet Preview
A3423 Dual Channel Hall Effect Direction Detection Sensor IC This device is in production, however, it has been deemed Pre-End of Life. The product is approaching end of life. Within a minimum of 6 months, the device will enter its final, Last Time Buy, order phase. Date of status change June 3, 2013 Recommended Substitutions: For existing customer transition, and for new customers or new applications, refer to the A1233. NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. A3423 Dual Channel Hall Effect Direction Detection Sensor IC Precisely aligned dual Hall elements Tightly matched magnetic switchpoints Speed and direction outputs Individual Hall element outputs L package Fast power-on time Output short circuit protection Operation from an unregulated power supply Wide operating temperature range Wide operating voltage range Integrated EMC-ESD protection Packages 8-pin SOIC suffix L 4-pin SIP suffix K Not to scale The A3423 is a dual-channel Hall-effect sensor IC ideal for use in speed and direction sensing applications incorporating encoder ring-magnet targets.TheA3423 provides various output signals that indicate speed and direction of target rotation. The Hall elements are both photolithographically aligned to better than 1 um. Maintaining accurate displacement between the two active Hall elements eliminates the major manufacturing hurdle encountered in fine-pitch detection applications. The A3423 is a highly sensitive, temperature-stable magnetic device ideal for use in harsh automotive and industrial environments. The Hall elements of the A3423 are spaced mm apart, which provides excellent speed and direction information for small-geometry targets. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. An on-chip regulator allows the use of this device over a wide operating voltage range of to 24 V. End-of-line trimming of the Hall element switchpoints provides tight matching capability. The continuous-time nature of the Hall elements delivers a fast start-up of the device and low noise. The A3423 has integrated protection against transients on the supply and output pins and short-circuit protection on all outputs. The A3423 is available in a 4-pin SIP and a plastic 8-pin SOIC surface mount package the SOIC version is currently in development . Both packages are lead Pb free, with 100% matte tin leadframe plating. Functional Block Diagram Regulator Power-on Logic L package only Output Current Limit OUTA E1 Trim Direction Logic Output Current Limit Output Current Limit DIR SPD Output Current Limit OUTB L package only A3423 Dual Channel Hall Effect Direction Detection Sensor IC Selection Guide Package A3423EK-T 4-pin through hole SIP

PDF Datasheet Preview

A3423

Dual Channel Hall Effect Direction Detection Sensor IC

This device is in production, however, it has been deemed Pre-End of Life. The product is approaching end of life. Within a minimum of 6 months, the device will enter its final, Last Time Buy, order phase. Date of status change June 3, 2013

Recommended Substitutions:

For existing customer transition, and for new customers or new applications, refer to the A1233.

NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

A3423

Dual Channel Hall Effect Direction Detection Sensor IC

Precisely aligned dual Hall elements Tightly matched magnetic switchpoints Speed and direction outputs Individual Hall element outputs L package Fast power-on time Output short circuit protection Operation from an unregulated power supply Wide operating temperature range Wide operating voltage range Integrated EMC-ESD protection

Packages
8-pin SOIC suffix L
4-pin SIP suffix K

Not to scale

The A3423 is a dual-channel Hall-effect sensor IC ideal for use in speed and direction sensing applications incorporating encoder ring-magnet targets.TheA3423 provides various output signals that indicate speed and direction of target rotation. The Hall elements are both photolithographically aligned to better than 1 um. Maintaining accurate displacement between the two active Hall elements eliminates the major manufacturing hurdle encountered in fine-pitch detection applications. The A3423 is a highly sensitive, temperature-stable magnetic device ideal for use in harsh automotive and industrial environments.

The Hall elements of the A3423 are spaced mm apart, which provides excellent speed and direction information for small-geometry targets. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. An on-chip regulator allows the use of this device over a wide operating voltage range of to 24 V.

End-of-line trimming of the Hall element switchpoints provides tight matching capability. The continuous-time nature of the Hall elements delivers a fast start-up of the device and low noise.

The A3423 has integrated protection against transients on the supply and output pins and short-circuit protection on all outputs.

The A3423 is available in a 4-pin SIP and a plastic 8-pin SOIC surface mount package the SOIC version is currently in development . Both packages are lead Pb free, with 100% matte tin leadframe plating.

Functional Block Diagram

Regulator Power-on Logic

L package only

Output Current

Limit

OUTA

E1 Trim

Direction Logic

Output Current

Limit

Output Current

Limit

DIR SPD

Output Current

Limit

OUTB

L package only

A3423

Dual Channel Hall Effect Direction Detection Sensor IC

Selection Guide

Package

A3423EK-T
4-pin through hole SIP

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Datasheet ID: A3423LLTR-T 516018