ZMX40MT8TA Diodes Zetex, ZMX40MT8TA Datasheet

ZMX40MT8TA

Manufacturer Part Number

ZMX40MT8TA

Description

IC SENSOR MAGNETIC DUAL 12V SM8

Manufacturer

Diodes Zetex

Type

Special Purposer

Datasheet

1.ZMX40MT8TA.pdf (5 pages)

Specifications of ZMX40MT8TA

Voltage - Supply

12V

Output Type

Analog

Operating Temperature

-25°C ~ 125°C

Package / Case

SOT-223-8

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Sensing Range

Current - Supply

Current - Output (max)

Features

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

ZMX40MT8TR

Current page: 1 of 5
Download datasheet (257Kb)

DUAL MAGNETIC FIELD SENSOR

DESCRIPTION

This device is a special tangential field difference

sensor with two AMR (Anisotropic Magneto-Resistive)

bridges for field movement measurements or field

comparative measurements.

The ZMX40M contains two extremely sensitive magnetic

sensor chips, mounted parallel to each other in an SM8

package, employing the magneto-resistive effect of thin

film permalloy. It allows the measurement of magnetic

fields or the detection of magnetic parts. The sensors each

consist of a chip covered with thin film permalloy stripes

which form a Wheatstone bridge, whose output voltage is

proportional to the magnetic field component Hy. A field

Hx, which is perpendicular to Hy, is necessary to suppress

the hysteresis and to bias the sensors into the linear

region. This field Hx is provided by an internal permanent

magnet.

The chips are mounted in the package 3mm apart. If a

magnet travels horizontally above the sensor, each chip

will give an output which will peak as the magnet passes

above it and the two peaks will be spatially separated by

3mm.

FEATURES

•

ISSUE 1 - MARCH 2004

Output voltage proportional to magnetic field Hy

across each chip

Both chips are in the same orientation and chip

centres are 3mm apart in Y direction

Magnetic fields vertical to the chip level Hz are not

effective

Disturbing fields Hx up to 30 kA/m are allowed

Extremely small chip distance from the top side of

package for accurate measurement

Internal magnet each chip for creation of auxiliary

field Hx

PINOUT

Top View

When the two peaks are the same amplitude, the magnet

must be mid-way between the two chips. Therefore this

double sensor can be used to measure position of, for

example, a wheel tooth very accurately for automotive

and machine-tool applications. With calibration to allow

for the tolerances on the bridge outputs being slightly

different, the ZMX40M has been used in machine tool

applications to resolve distances down to 30µm. By

comparing the two outputs and adding some hysteresis,

a large-geometry magnetic tape reader (for example for a

magnetic tape ruler) can be made. By combining both

bridge outputs a current sensor can be also made by

adding an external current loop over or under the

ZMX40M. This loop is outside the package and therefore

provides excellent galvanic isolation.

APPLICATIONS

•

DEVICE MARKING

•

CONNECTION DIAGRAM

AMR chip 1: supply voltage between +Vb1 and -Vb1

AMR chip 2: supply voltage between +Vb2 and

Linear position measurement for process control,

door interlocks, proximity detectors and precision

machine tools

H-field movement measurement for a magnetic

tape recognition

High voltage isolated current measurement up to

many amps range by using a suitable current loop

over or under the IC

Detection of rotating magnets in the presence of a

disturbing field by comparisons of maximum

values of individual sensors

ZMX40M

output voltage of bridge between

-Vb2 output voltage of bridge between

out

1 and -V

2 and -V

out

S E M I C O N D U C T O R S

ZMX40M

Related parts for ZMX40MT8TA

ZMX40MT8TA Summary of contents

Page 1

DUAL MAGNETIC FIELD SENSOR DESCRIPTION This device is a special tangential field difference sensor with two AMR (Anisotropic Magneto-Resistive) bridges for field movement measurements or field comparative measurements. The ZMX40M contains two extremely sensitive magnetic sensor chips, mounted parallel to ...

Page 2

... Temp. coeff. of open TCS V circuit sensitivity V =5V B Temp. coeff. of open TCS I circuit sensitivity I =3mA B ORDERING INFORMATION DEVICE REEL TAPE SIZE WIDTH ZMX40MT8TA 7” 12mm ZMX40MT8TC 13” 12mm SYMBOL TOT T amb T stg =25°C and H =3 kA/m unless otherwise stated) amb X MIN ...

Page 3

TYPICAL APPLICATIONS Magnetic tape scanning (field movement measurement for magnetic tape ruler): The changing voltage peaks in both AMR bridges are used for the tape movement measurement. ZMX40M plus two instrumentation amplifiers for magnetic tape ruler AMR ...

Page 4

ZMX40M ISSUE 1 - MARCH 2004 4 ...

Page 5

PACKAGE OUTLINE PACKAGE DIMENSIONS Millimeters Inches DIM Min Max Typ. Min Max 0.067 A1 0.02 0.1 - 0.008 0.004 0 0.24 0.32 - 0.009 0.013 D 6.3 6.7 - 0.248 ...

Related keywords

ZMX40MT8TA datasheet
ZMX40MT8TA data sheet
ZMX40MT8TA pdf datasheet
ZMX40MT8TA component
ZMX40MT8TA part
ZMX40MT8TA distributor
ZMX40MT8TA RoHS
ZMX40MT8TA datasheet download