A3230LLHLT

A3230LLHLT Datasheet


A3230 Chopper-Stabilized Hall-Effect Bipolar Switch

Part Datasheet
A3230LLHLT A3230LLHLT A3230LLHLT (pdf)
Related Parts Information
A3230LLHLT-T A3230LLHLT-T A3230LLHLT-T
A3230ELHLT A3230ELHLT A3230ELHLT
A3230LUA-T A3230LUA-T A3230LUA-T
A3230ELHLT-T A3230ELHLT-T A3230ELHLT-T
A3230EUA A3230EUA A3230EUA
A3230EUA-T A3230EUA-T A3230EUA-T
A3230LUA A3230LUA A3230LUA
PDF Datasheet Preview
A3230 Chopper-Stabilized Hall-Effect Bipolar Switch

Discontinued Product

This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available.

Date of status change December 3, 2013

Recommended Substitutions:

For existing customer transition, and for new customers or new applications, refer to the Allegro A1250.

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

A3230 Chopper-Stabilized Hall-Effect Bipolar Switch

Chopper stabilization Superior temperature stability Extremely low switchpoint drift Insensitive to physical stress

Packages 3 pin SOT23W suffix LH , and 3 pin SIP suffix UA

The A3230 Hall-effect sensor IC is a temperature stable, stress-resistant bipolar switch. This device is the most sensitive Hall-effect device in the Allegro bipolar switch family and is intended for ring-magnet sensing. Superior high-temperature performance is made possible through an Allegro dynamic offset cancellation that utilizes chopper-stabilization. This method reduces the offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.

The A3230 includes the following on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short circuit protected open-drain output. Advanced BiCMOS wafer fabrication processing takes advantage of low-voltage requirements, component matching, very low input-offset errors, and small component geometries.

The A3230 Hall-effect bipolar switch turns on in a south polarity magnetic field of sufficient strength and switches off in a north polarity magnetic field of sufficient strength. Because the output state is not defined if the magnetic field is

Not to scale

Continued on the next

Functional Block Diagram

Dynamic Offset Cancellation

Sample and Hold Low-Pass Filter

Regulator To All Subcircuits Control Current Limit

VOUT <1Ω

A3230

Chopper-Stabilized Hall Effect Bipolar Switch

Description continued diminished or removed, to ensure that the device switches, Allegro recommends using magnets of both polarities and of sufficient strength in the application.

The A3230 is rated for operation between the ambient temperatures and 85°C for the E temperature range, and to 150°C
for the L temperature range. Two A3230 package styles provide magnetically optimized solutions for most applications. Package LH is a SOT23-W, a miniature low-profile surface-mount package, while package UA is a three-lead ultramini SIP for through-hole mounting. Each package is available in a lead Pb free version, with 100% matte tin plated leadframes.

Selection Guide

Packing1

Mounting

Ambient, TA BRP MIN BOP MAX

A3230LLHLT-T2 7-in. reel, 3000 pieces/reel
3-pin SOT23W surface mount

A3230LUA-T2 Bulk, 500 pieces/bag
3-pin SIP through hole
to 150
1Contact Allegro for additional packing options. 2Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant is currently restricted to existing customer applications. The variant should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status date change January 30,

Absolute Maximum Ratings

Operating Ambient Temperature

Maximum Junction Temperature Storage Temperature

Symbol VCC VRCC VOUT

IOUTSINK IROUT B

TJ max Tstg
More datasheets: EB41M1809 | M1118 SL005 | M1118 SL002 | M1118 SL001 | A3230LLHLT-T | A3230ELHLT | A3230LUA-T | A3230ELHLT-T | A3230EUA | A3230EUA-T


Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived A3230LLHLT Datasheet file may be downloaded here without warranties.

Datasheet ID: A3230LLHLT 516014