AMR4100 datasheet(3/7 Pages) MULTIDIMENSION

3 / 7 page

1. Functional Block Diagram

Eight AMR resistors inside the sensor, power supply

and electrical connection of two sets of analog voltage

outputs as shown in Figure 1.

GND

+V1

-V1

+V2

-V2

Figure 1. Block diagram

2. Application schematics

AMR4100 sensor responds to horizontal magnetic

field (X-Y plane), and magnetic field rotation angle θ

was defined as 0º, while V1 = VPEAK and V2 = VOFF,

when magnetic field direction is in the same direction

as X-axis as shown in Figure 3, the red dash line.

Pin1

Figure 2. Sensing direction

The positions and magnetization directions of eight

AMR sensing elements integrated in the sensor

are precisely designed, so that the sensor output

V1 = Acos(2θ) represents the angle between the

direction of the external magnetic field and X axis,

and V2 = Bsin(2θ) represents the angle between the

direction of the external magnetic field and Y axis,

where A and B are constant and A

≅B.Theangular

position information of the applied magnetic field at

any time can be obtained by combining the V1 and

V2 signals at the corresponding time.

Each output signal is a differential analog voltage

signal, and each signal consists of two pin outputs

as shown in the table of pin configuration section.

3. Pin Configuration

V2+

V2-

V1+

V1-

GND

V2+

V2-

V1+

V1- GND

俯视图

底视图

Figure 3. Pin configuration (DFN12L)

Number Symbol

Function

V2-

Sin signal negative output

V1-

Cos signal negative output

GND

Ground

V1+

Cos signal positive output

V2+

Sin signal positive output

VCC

Power supply

Heat dissipation pad

Note: Pin 9, pin 12 and heat dissipation pad EP are

internally connected

AMR4100

MultiDimension Technology Co., Ltd.

http://www.dowaytech.com/en/

High accuracy analog output

dual axis position sensor

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