Programmable Linear Hall Effect Sensor ICs with Analog Output

Available in a Miniature Thin Profile Surface Mount Package

A1381, A1382,

A1383, and A1384

7

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

Characteristic Definitions

Power-On Time

When the supply is ramped to its operating

voltage, the device requires a finite time to power its inter-

nal components before responding to an input magnetic field.

put voltage to settle within ±10% of its steady state value under

an applied magnetic field, after the power supply has reached its

following chart.

Delay to Clamp

A large magnetic input step may cause the

clamp to overshoot its steady state value. The Delay to Clamp,

settle within ±1% of its steady state value, after initially passing

through its steady state voltage, as shown in the following chart.

Quiescent Voltage Output

In the quiescent state (no significant

Guaranteed Quiescent Voltage Output Range

The quiescent

value of 2.5 V, within the guaranteed quiescent voltage range

Average Quiescent Voltage Output Step Size

The average qui-

escent voltage output step size for a single device is determined

using the following calculation:

V

Step

.

(1)

where:

n is the number of available programming bits in the trim

range,

range, and

Quiescent Voltage Output Programming Resolution

The pro-

gramming resolution for any device is half of its programming

step size. Therefore, the typical programming resolution will be:

Err

.

(2)

V

+t

0

minimum specified operating voltage

within ±10% of its steady state value

under an applied magnetic field

V

t

Magnetic Input

0

reaches steady state clamp voltage

within 1% of steady state clamp voltage

Note: Times apply to both high clamp

(shown) and low clamp.

Guaranteed Output

Programming

Distribution for

Distribution for