A1373EKB datasheet(13/22 Pages) ALLEGRO

13 / 22 page

High Precision, Output Pin Programmable

Linear Hall Effect Sensors

A1373 and

A1374

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

Linear: A type of Hall-Effect sensor that produces an analog output voltage proportional to the strength of a sensed magnetic field.

Ratiometric: A linear Hall-Effect sensor that, when not subjected to a significant magnetic field, has an output that is a ratio of its supply voltage.

A ratiometric performance of 100% indicates the output follows the supply with no percentage error.

Gauss: Standard unit of measuring magnetic flux density. 1 gauss is equal to 1 Maxwell per square centimeter or 10-4 tesla. (For reference, the

earth’s magnetic field is approximately 0.5 gauss.)

Blowing: Applying a pulse of sufficient voltage and duration to permanently set a bit, by blowing a fuse internal to the device. Once a bit (fuse)

has been blown, it cannot be reset. The terms trimming and programming can be used interchangeably with blowing in this context.

Programming modes

: Testing the results is the only valid method to guarantee successful programming, and multiple modes are provided to

support this. The programming modes are described in the section Mode Selection State.

Code: The number used to identify the register and the bitfield to be programmed, expressed as the decimal equivalent of the binary value. The LSB

of a register is denoted as bit 0.

Definitions of Terms

Typical Application Drawing

VCC

VREG

Sensor Output

GND

VOUT

CBYPASS

0.1 μF

CLOAD

1nF

RLOAD

4.7 k

A1373

A1374

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