A1360 datasheet(23/25 Pages) ALLEGRO | Low-Noise Programmable Linear Hall Effect Sensor ICs with

23 / 25 page

A1360, A1361,

and A1362

The flux density measured by the A136x SIP is related to the

size of the gap cut into the core. The larger the gap in the core,

the smaller the flux density per ampere of applied current (see

figure 8).

Figure 9 depicts the magnetic flux density through the center of

the SIP as a function of SIP to core alignment. Note that a core

with a larger cross-sectional area would reduce the attenuation

in flux density that results from any SIP misalignment. The flat

portion of the curve in figure 9 would span a larger distance in

millimeters if the cross-sectional area of the core were increased.

Wire

–2

Ring concentrator

Magnetic flux in gap

Measurement plane

(midplane of gap)

Figure 9. Side view of example current-conducting wire and split ring concentrator (left), and

magnetic proﬁle (right) through the midplane of the gap in the split ring concentrator. The ﬂux

denisty through the center of the gap varies between the inside and the outside of the gap.

7.0

6.5

6.0

5.5

5.0

4.5

4.0

3.5

3.0

–2.0

Radial Displacement from Concentrator Centerline (mm)

Interior side of

Concentrator

Exterior side of

Concentrator

–1.0

1.0

2.0

Figure 8. The flux density per ampere measured by the A136x Hall sen-

sor IC is related to the core gap, as shown. This figure assumes that the

current sensing application is constructed using the example setup.

Flux Density per Ampere vs. Gap for a Feedthrough Sensor

0.5

1.5

2.5

3.5

Gap (mm)

Low-Noise Programmable Linear Hall Effect Sensor ICs with

Adjustable Bandwidth (50 kHz Maximum) and Analog Output

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

A1360 Datasheet(PDF) 23 Page - Allegro MicroSystems

A1360 Datasheet(HTML) 23 Page - Allegro MicroSystems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Datasheet Download

Link URL