US3881 Datasheet, PDF(1/6 Page) List of Unclassifed Manufacturers

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US3881 Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – CMOS Low Voltage Hall Effect Latch

US3881

CMOS Low Voltage Hall Effect Latch

Features and Benefits

â¢ Chopper stabilized amplifier stage

â¢ Optimized for BDC motor applications

â¢ New miniature package / thin, high reliability package

â¢ Operation down to 2.2V

â¢ CMOS for optimum stability, quality, and cost

Applications

â¢ Solid state switch

â¢ Brushless DC motor commutation

â¢ Speed sensing

â¢ Linear position sensing

â¢ Angular position sensing

â¢ Current sensing

Ordering Information

Part No.

US3881

Temperature Suffix

Package

SO or UA

Temperature Range

-40oC to 85oC Commercial

-40oC to 150oC Automotive

* Contact factory or Sale Representative for legacy temperature options

Functional Diagram

VDD

Voltage

Regulator

Chopper

Output

UA Package

Pin 1 - VDD

Pin 2 - GND

Pin 3 - Output

GND

SO Package

Pin 1 - VDD

Pin 2 - Output

Pin 3 - GND

Description

The US3881 is a bipolar Hall effect sensor IC fabri-

cated from mixed signal CMOS technology. It in-

corporates advanced chopper stabilization tech-

niques to provide accurate and stable magnetic

switch points. There are many applications for this

sensor in addition to those listed above. The de-

sign, specifications, and performance have been

optimized for commutation applications in 5V and

12V brushless DC motors.

The output transistor will be latched on (BOP) in the

presence of a sufficiently strong South pole mag-

netic field facing the marked side of the package.

Similarly, the output will be latched off (BRP) in the

presence of a North field.

The SOT-23 device is reversed from the UA pack-

age. The SOT-23 output transistor will be latched

on in the presence of a sufficiently strong North

pole magnetic field subjected to the marked face.

Note: Static sensitive device; please observe ESD precautions. Re -

verse VDD protection is not included. For reverse voltage protec -

tion, a 100â¦ resistor in series with VDD is recommended.

US3881 CMOS Low Voltage Hall Effect Latch

3901003881 Rev 4.2

7/23/01

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