User Manual – AS5261 / AS5262 Adapterboard
AS5261-EK-AB / AS5262-EK-AB
12 BIT Magnetic Angle Position
Sensor with 2 Outputs
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Revision 1.0 / 2012/10/31
AS5261/ AS5262 Adapterboard User manual
Table of Contents
1.
2.
3.
4.
5.
6.
7.
General Description ............................................................................................................... 2
Package and Board Description ............................................................................................ 3
AS5261/ AS5262 and adapter board pin out ......................................................................... 5
Operation case ...................................................................................................................... 6
Programming the AS5261 / AS5262 ...................................................................................... 6
AS5261 /AS5262 adapter board hardware ........................................................................... 7
Ordering Information .............................................................................................................. 8
Copyright ....................................................................................................................................... 9
Disclaimer ..................................................................................................................................... 9
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AS5261/ AS5262 Adapterboard User manual
1. General Description
This document describes the features and operation of the AS5261 / AS5262 Adapterboard.
The AS5261 / AS5262 is a contactless magnetic angle position sensor for accurate angular
measurement over a full turn of 360°. A sub range can be programmed to achieve the best
resolution for the application. It is a system-on-chip, combining integrated Hall elements, analog
front end, digital signal processing and best in class automotive protection features in a single
device.
To measure the angle, only a simple two-pole magnet, rotating over the center of the chip, is
required. The magnet may be placed above or below the IC.
The absolute angle measurement provides instant indication of the magnet’s angular position
with a resolution of 0.022° = 16384 positions per revolution. According to this resolution the
adjustment of the application specific mechanical positions are possible. The angular output data
is available over a 12 bit ratiometric analog output.
The AS5261 / AS5262 operates at a supply voltage of 5V and the supply and output pins are
protected against overvoltage up to +20V. In addition the supply pins are protected against
reverse polarity up to –20V.
The AS5261 / AS5262 is a dual die version, with 2 independend die’s in one package. This part
can be used full redundant with 2 supplies.
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AS5261/ AS5262 Adapterboard User manual
2. Package and Board Description
Adapterboard Kit Contents
The demo kit includes following items listed below in
Table 1.
Table 1:
Adapter Kit Contents
Pos
1
2
Item
AS5261 or AS5262 Adapterboard
Diametrial Magnets
Comment
Board + AS5261 or AS5262
Board Description
The AS5261 / AS5262 adapter board is a simple circuit allowing test and evaluation the rotary
encoder quickly without building a test fixture or PCB. The PCB requires a 4-wire connection: 5V
power supply, GND and two output connection . If there is the need to use full redundancy ( 6-
wire connection), a different PCB is required. Pin 1, 3, 5, of JP1 are the Top Die Connection.
Pin 2,4 and 6 of JP1 are the bottom die connection.Capacitor C1 and C2 (both 1uF) are
buffering the LDO output VDD3 of the top-die and the bottom-die; C3 (1uF) is placed between
VDD and GND.
Resistor R1,R2,R3 and R4 as well as the capacitor C5,C6,C7 and C8 are optional, for using
different filter options during the Evaluation phase..
Figure 2
Adapterboard front view
(A) JP1 Connector
A
( GND,VCC,OUT)
(B) AS5261 / AS5262 sensor
(C) 4 x 2.6 mm mounting
holes
B
C
D
(D) Marking for AS5261 or
AS5262 AB Board
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AS5261/ AS5262 Adapterboard User manual
Mounting the AS5261 / AS5262 adapter board
Figure 3
Adapter board with mechanical components
A
Magnet
AS516x
B
0.5~2mm
C
(A) Rotating shaft and magnet
holder – Not
ferromagnetic
D
E
(B) Bearing
(C) Casing
(D) Spacer
2
1
GND
VCC
OUT
(E) M2~M2.5 Screw + nut
JP1
4x2.6 mm
Diametral
Magnet
AS516x
S
N
A diametric magnet must be placed over or under the AS5261 / AS5262 Sensorboard, and
should be placed centered in x and y direction. Tolerance of 0.5mm
The airgap between the magnet and the encoder casing should be maintained in the range of
0.5mm~2mm ( magnet related).
The magnet holder must be not ferromagnetic. e.g copper, aluminium, stainless steel.
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