Low Current Ultrasensitive Two-Wire

Chopper-Stabilized Unipolar Hall Effect Switches

A1148

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

Selection Guide

Part Number

Package

Operating Ambient

(°C)

Output Level in

A1147ELHLT-T

Yes

Tape and Reel, 3000 pieces/reel

Surface Mount

–40 to 85

Low

A1147EUA-T

Yes

Bulk Bag, 500 pieces/bag

Through Hole

A1147EUATI

–

Tape and Reel, 2000 pieces/reel

A1147EUATI-T

Yes

A1147LLHLT-T

Yes

Tape and Reel, 3000 pieces/reel

Surface Mount

–40 to 150

A1147LUA-T

Yes

Bulk Bag, 500 pieces/bag

Through Hole

A1147LUATI

–

Tape and Reel, 2000 pieces/reel

A1147LUATI-T

Yes

A1148ELHLT-T

Yes

Tape and Reel, 3000 pieces/reel

Surface Mount

–40 to 85

High

A1148EUA-T

Yes

Bulk Bag, 500 pieces/bag

Through Hole

A1148EUATI

–

Tape and Reel, 2000 pieces/reel

A1148EUATI-T

Yes

A1148LLHLT-T

Yes

Tape and Reel, 3000 pieces/reel

Surface Mount

–40 to 150

A1148LUA-T

Yes

Bulk Bag, 500 pieces/bag

Through Hole

A1148LUATI

–

Tape and Reel, 2000 pieces/reel

A1148LUATI-T

Yes

a. Certain variants cited in this footnote are in production but have been determined to be LAST TIME BUY. This classification indicates that sale of

this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obso-

lescence in the near future is probable. Samples are no longer available. Status change: October 31, 2006. Deadlilne for receipt of LAST TIME BUY

ORDERS: April 27, 2007. These variants include: A1147ELHLT, A1147EUA, A1147LLHLT, A1147LUA, A1148ELHLT, A1148EUA, and, A1148LLHLT.

b. Certain variants cited in this footnote are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that

sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because

obsolescence in the near future is probable. Samples are no longer available. Status change: May 1, 2006. These variants include: A1148LUA.

feature on-chip transient protection and a Zener clamp to protect

against overvoltage conditions on the supply line.

The output currents of the A1148 switches HIGH in the presence

of a south (+) polarity magnetic field of sufficient strength, and

switches LOW otherwise, as in the presence of a weak field or a

north (–) polarity field. The A1147 has an opposite output: the

currents switch LOW in the presence of a south-polarity magnetic

field of sufficient strength, and switch HIGH otherwise.

Both versions are offered in two package styles. The LH is a SOT-

23W, miniature low-profile package for surface-mount applications.

The UA is a three-lead ultramini SIP for through-hole mounting.

Each package is available in a lead (Pb) free version (suffix, –T)

with100%mattetinplatedleadframe. Field-programmableversions

also available: A1180 and A1181.

Absolute Maximum Ratings

Characteristic

Symbol

Notes

Rating

Units

Supply Voltage

28

V

Reverse Supply Voltage

–18

V

Magnetic Flux Density

B

Unlimited

G

Operating Ambient Temperature

Range E

–40 to 85

ºC

Range L

–40 to 150

ºC

Maximum Junction Temperature

165

ºC

Storage Temperature

–65 to 170

ºC

Description (continued)