US2881 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

US2881

CMOS High Sensitivity Latch

Unspecified 

US2881/2882

CMOS High Sensitivity Latch

Features and Benefits

• Chopper stabilized amplifier stage

• Optimized for BDC motor applications

• New miniature package / thin, high reliability package

• Operation down to 3.5V

• CMOS for optimum stability, quality, and cost

• Ultra low IDD current

Applications

• Solid state switch

• Brushless DC motor commutation

• Speed sensing

• Linear position sensing

• Angular position sensing

• Current sensing

Ordering Information

Part No.

US2881 / US2882

US2881 / US2882

Temperature Suffix Package

E

SO or UA

L

SO or UA

Temperature Range

-40oC to 85oC Extended

-40oC to 150oC Full Temp.

*Contact Factory or Sales Representative for Legacy Temperature Versions

Functional Diagram

VDD

Voltage

Regulator

Chopper

Output

UA Package

Pin 1 - V D D

Pin 2 - GND

Pin 3 - Output

GND

SO Package

Pin 1 - VD D

Pin 2 - Output

Pin 3 - GND

Description

The design specifications and performance of the

Melexis US2881 have been optimized for commu-

tation applications in brushless DC motors and

automotive speed sensing.

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 package. The SOT-23 output

transistor will be latched on (BOP) 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 protection,

a 100Ω resistor in series with VDD is recommended.

US2881 CMOS High Sensitivity Latch

3901002881 Rev 5.6

23/July/00

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