User Manual – AS5304/AS5306 – AB – 2.1
AS5304/AS5306
160-step Linear Incremental Position Sensor with Linear
analog and ABI output
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User Manual – AS5304/AS5306 – AB – 2.1
Table of Contents
1
General Description ............................................................................................................. 3
2
The AS5304/5306 adapter board......................................................................................... 3
2.1
Board description ................................................................................................................. 3
2.2
Mounting the AS5304/AS5306 adapter board ..................................................................... 4
3
AS5304/AS5306 adapter board and pinout ......................................................................... 5
4
Operation cases ................................................................................................................... 6
5
AS5304 Differences to AS5306 ........................................................................................... 7
6
AS5304/AS5306 adapter board hardware ........................................................................... 8
6.1
AS5304/AB5306 – AB – 2.1 Adapterboard schematics....................................................... 8
6.2
AS5304/AS5306 – AB – 2.1 PCB layout.............................................................................. 8
7
Copyright .............................................................................................................................. 9
8
Disclaimer ............................................................................................................................ 9
9
Contact Information .............................................................................................................. 9
Revision History
Revision
Date
1.0
01.10.2009
1.1
09.07.2013
www.ams.com
Owner
Description
Initial revision
azen
Updated to new template
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User Manual – AS5304/AS5306 – AB – 2.1
1
General Description
The AS5304 and AS5306 are single-chip IC’s with integrated Hall elements for measuring linear
motion using multi-pole magnetic strips.
The AS5304/AS5306 are mounted off-axis underneath a multi-pole magnetized strip and provides a
quadrature incremental output with 40 pulses per pole period (resolution of 25µm per step) at
speeds of up to 20 meters/sec.
A single index pulse is generated once for every pole pair at the Index output. The pole pair length
is 4mm (2mm north/ 2mm south). The chip accepts a magnetic field strength down to 5mT (peak).
Figure 1:
Linear Position Sensor AS5304 + Multipole Magnetstrip
2
2.1
The AS5304/5306 adapter board
Board description
The AS5304/AS5306 adapter board is a simple circuit allowing, testing and evaluating the
AS5304/AS5306 linear encoders quickly without having to build a test fixture or PCB.
The normal operation requires only a 5V power supply, the quadrature AB outputs are attached to a
microcontroller of quadrature counter.
Figure 2:
AS5304/AS5306 AB
JP1 connector
(Power supply, quadrature, signal
level, index)
AS5304/AS5306 linear &
rotary motion sensor
4 x 2.6mm mounting
holes
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User Manual – AS5304/AS5306 – AB – 2.1
2.2
Mounting the AS5304/AS5306 adapter board
A multipole magnetic strip, pole pair length = 4mm must be placed over the AS5304/AS5306 as
shown on Figure 3. The middle axis of the strip and of the AS5304/AS5306 ICs is shifted by 1mm.
The airgap between the magnet and the AS5304/AS5306 casing should be maintained below
0.8mm. Note that the strip side facing the AS5304/AS5306 ICs the opposite side of the metallic
tape.
The magnet holder must not be ferromagnetic. Materials as brass, copper, aluminum, stainless
steel are the best choices to make this part.
Figure 3:
AS5304/AS5306 adapter board mounting and dimension
≤ 0.8mm
AS5304
Strip
Magnet
PCB
Metal tape
(holder)
22mm
JP1
Ind
AO
B
A
GND
5V
28mm
4x2.6mm
AS5304
11mm
Strip
Magnet
AS5304
18mm
Strip
Magnet
1 mm
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AS5304
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User Manual – AS5304/AS5306 – AB – 2.1
3
AS5304/AS5306 adapter board and pinout
Figure 4:
AS5304/AS5306 adapter board connectors and encoder pinout
1
20
ZPZ
Ind
AO
B
A
GND
A
2
19
test
VDDP
3
18
test
B
4
17
test
test
5
16
VDDA_Hall
AO
6
15
test_GND
VDD
7
14
test
Index
8
13
test
test
9
12
test
test
10
11
test
5V
AS5304A
AS5304A
VSS
JP1
Table 1:
Pin description
JP1
Pin#
Board
Pin#
1
Symbol
Type
Description
3, 7, 16
5V
S
Positive supply voltage, 4.5V to 5.5V
2
1
GND
S
Supply ground
3
2
A
DO
Clock Input of Synchronous Serial Interface; SchmittTrigger input
AS530X
4
4
B
DO
Chip Select for serial data transmission, active high;
Schmitt-Trigger input,
external pull-down resistor (~50k) required in readonly mode
5
6
AO
AO
Data output / command input for digital serial interface
6
8
INDEX
DO
Command input for digital serial interface. Connect to
GND if not used.
Pin types:
S:
supply pin
DO:
digital output
AO:
analog output
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User Manual – AS5304/AS5306 – AB – 2.1
4
Operation cases
Connect a regulated power supply on 5V (pin #1) and GND (pin #2).
Connect the A and B outputs to a quadrature counter or microcontroller inputs. The index output is
optional, if a pulse is needed at each magnet pole pair transition.
For more information, please refer to the AS5304/AS5306 datasheet.
Figure 5:
Using the analog output with the adapter board
MCU or
quadrature counter
A
B
JP1
+5V
Ind
AO
B
A
GND
5V
GND
Regulated
Power
Supply
AS5304
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User Manual – AS5304/AS5306 – AB – 2.1
5
AS5304 Differences to AS5306
Table 2:
Differences AS5304 & AS5306
Building Block
AS5304
AS5306
Ring magnet radius
2mm
1.2mm
Vertical Distance
between Magnet and
IC
≤0.8mm
≤0.4mm
Resolution
1 LSB = 25µm
1 LSB = 15µm
Magnetic pole pair
lenght
4mm
2.4mm
Magnetic ring diameter
= [pole length] *
[number of pole pairs] /
π
4 * 22 / 3.14 = 28.01mm
2.4 * 22 / 3.14 = 16.8mm
Maximum linear
travelling speed = 5000
* [pole pair length]
Max. linear travelling speed = 4mm * 5000
1/sec = 20,000mm/sec = 20m/sec
Max. linear travelling speed =
2.4mm * 5000 1/sec =
12,000mm/sec = 12m/sec
Power supply current
min. 25mA ; max. 35mA
min. 20mA ; max. 30mA
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User Manual – AS5304/AS5306 – AB – 2.1
6
6.1
AS5304/AS5306 adapter board hardware
AS5304/AB5306 – AB – 2.1 Adapterboard schematics
Figure 6:
AS5304/AS5306-AB-2.1 schematics
6.2
AS5304/AS5306 – AB – 2.1 PCB layout
Figure 7:
AS5304/AS5306-AB-2.1 layout
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User Manual – AS5304/AS5306 – AB – 2.1
7
Copyright
Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstätten, Austria-Europe. Trademarks
Registered. All rights reserved. The material herein may not be reproduced, adapted, merged,
translated, stored, or used without the prior written consent of the copyright owner.
8
Disclaimer
Devices sold by ams AG are covered by the warranty and patent indemnification provisions
appearing in its Term of Sale. ams AG makes no warranty, express, statutory, implied, or by
description regarding the information set forth herein. ams AG reserves the right to change
specifications and prices at any time and without notice. Therefore, prior to designing this product
into a system, it is necessary to check with ams AG for current information. This product is intended
for use in commercial applications. Applications requiring extended temperature range, unusual
environmental requirements, or high reliability applications, such as military, medical life-support or
life-sustaining equipment are specifically not recommended without additional processing by ams
AG for each application. This Product is provided by ams “AS IS” and any express or implied
warranties, including, but not limited to the implied warranties of merchantability and fitness for a
particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any damages, including but not limited
to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect,
special, incidental or consequential damages, of any kind, in connection with or arising out of the
furnishing, performance or use of the technical data herein. No obligation or liability to recipient or
any third party shall arise or flow out of ams AG rendering of technical or other services.
9
Contact Information
Headquarters
ams AG
Tobelbader Strasse 30
8141 Unterpremstaetten
Austria
T. +43 (0) 3136 500 0
For Sales Offices, Distributors and Representatives, please visit:
http://www.ams.com/contact
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Authorized Distributor
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