Depending on the application the AS5311 accepts multi-pole strip magnets as well as multi-pole ring magnets, both radial and axial magnetized.

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1 S Demoboard OPERTION MNUL pplication note General Overview The S is a contactless high resolution magnetic linear eoder for accurate linear motion and off-axis rotary sensing with a resolution down to <0.µm. It is a system-on-chip, combining integrated Hall elements, analog front end and digital signal processing on a single chip, packaged in a small 0-pin TSSOP package. multipole magnetic strip or ring with a pole length of.0mm is required to sense the rotational or linear motion. The magnetic strip is placed above the IC at a distae of typ. 0.mm. The absolute measurement provides instant indication of the magnet position within one pole pair with a resolution of 88nm per step (-bit over.0mm). This digital data is available as a serial bit stream and as a PWM signal. Furthermore, an iremental output is available with a resolution of.9 µm per step. n index pulse is generated oe for every pole pair (oe per.0mm).the travelling speed in iremental mode is up to 0mm/second. n internal voltage regulator allows the S to operate at either. V or V supplies. Depending on the application the S accepts multi-pole strip magnets as well as multi-pole ring magnets, both radial and axial magnetized. The S Demoboard The S demoboard is a complete linear eoder system with built-in microcontroller, US interface, graphical LCD display, iremental indicators, iremental counter serial communication and PWM output LED. The board is US powered or externally supplied with a 9V battery for standalone operation. US plug (power supply or PC communication) LCD display 9V battery connector (standalone only) J: External Eoder SSI Connector J: PWM output and indicator SW: Eoder selection - External (top) - Onboard (bottom) J8: S status signals connector and indicators Slider with multipole magnet (mm pole length) over S Slider guide J: S ieremental / and Index connector and indicators S: Iremental counter reset switch Figure : S Demoboard hardware with mounted magnet knob Revision.0, 09 pril 009 Page of 9

2 Operating the S Demoboard The S demoboard can be used in several ways: s standalone unit supplied by a 9V battery Connect a 9V battery to the battery connector on the top right side of the board. No other connections are required. s standalone unit supplied by an US port Connect the demoboard to a PC using a US/US cable (iluded in demoboard shipment). The board is supplied by the V supply of the US port. No other connections are required.. Hardware Indicators and Connectors.. Graphic LCD display The LCD display shows the realtime absolute and relative position of the magnet: - The absolute position is read from the S serial output. The resolution is 0.88µm = 09 positions per pole pair (mm). To use this feature with the onboard eoder, switch SW must be on position INT. - The relative position is read from the iremental counter connected on the outputs of the S. The resolution is.9µm / step. To use this feature with the onboard eoder, jumpers P and P (ottom side) must be CLOSED. Moving the slider from right to left will irease the absolute value until 09 (999µm) with 0.88µm steps, then returns to 0. The iremental counter will irement on the same way with.9µm steps. To reset the relative position, press the push button S. The magnet status indicator (magnet OK), (magnet too close or too far, reduced accuracy), (magnet too close or too far, values not valid and display stopped) is related to the magnet position. bsolute position in a pole pair (mm) bit value (0 ~ 09) step = 0.88µm SOLUTE POSITION 0.88µm/step RELTIVE POSITION.9µm/step Relative position from quadrature counter step =.9µm bsolute position in a pole pair 0 ~ 999µm Relative position from quadrature counter in µm bsolute position bargraph 0~00% in a pole pair.. PWM LED Figure : LCD display in standalone mode (9V battery or US powered without GUI) Magnetic field status: Magnet OK Magnet too far or too close, reduced accuracy Magnet too far or too close, value not valid This LED is connected to the PWM output of the S. The PWM output is a pulse width that is proportional to the position of a pole-pair of the magnet The pulse width varies from μs to 09μs typ with a repetition rate of Hz typ.. When the position of the pole-pair is 0, the LED is almost dark, as it is μs on and 09μs off. Moving the magnet to the left ireases the brightness of the PWM LED, sie the ON-pulse becomes longer and the OFF-pulse becomes shorter. The brightness of the PWM LED follows the absolute position bargraph. Likewise, the PWM output can be used as an analog output proportional to the angle, when the PWM signal is filtered by a RC (or active) lowpass filter. The PWM signal (0 ~ V) can be directly taken from the connector J... Iremental quadrature -Index LED The phase shift between channel and indicates the direction of the magnet movement. Channel leads channel during a right-to-left movement of the magnet by 90 electrical degrees. Channel leads channel during a left-to-right movement. One Index pulse (V) is generated at each pole pair changes (see S datasheet Figure 9). The -Index LEDs are directly connected to the Index outputs of the S. These quadrature signals (0 ~ V) are available on connector J. Revision.0, 09 pril 009 Page of 9

3 S Demoboard OPERTIONL MNUL.. MagINCn and MagDECn MagINCn and MagDECn are the magnetic field change indicators (magnetic field strength irease or decrease through variation of the distae between the magnet and the device). These outputs can be used to detect the valid magnetic field range. - LEDs MagINC and MagDEC OFF, the magnet is correctly positioned LCD indicator - LED MagINC ON and MagDEC OFF, magnet too close or too far, reduced accuracy LCD indicator - LEDs MagINC and MagDEC ON, magnet too close or too far, values not valid and display stopped LCD indicator.. Eoder selection switch The switch SW selects the eoder which communicates with the microcontroller through the SSI bus (bsolute position):. INT (ottom position, default): Onboard S. EXT (Top Position): External S connected on J The signals of the syhronous serial interface (DO, CLK, CSn) and the power supply (.V, ) of an external device can be connected directly to J. In this configuration, the data of the serial interface (absolute position) are displayed on the GUI or the LCD. If the iremental position of the external eoder is used, remove the jumpers P and P (bottom side of the board), and connect the signals from the eoder to the jumpers as shown on figure below. Serial Outputs (absolute) Demoboard switched to external eoder mode Demoboard TOP view Iremental Outputs (Relative) Demoboard OTTOM view Figure : external S connection to the demoboard (top and bottom view) Revision.0, 0 pril Page of 9

4 S Demoboard OPERTIONL MNUL Revision.0, 0 pril Page of 9 S Demoboard bloc diagram, schematics, layout attery SPI Figure 9: S bloc diagram Vout Vin U S0-0 D T C9 u J Header VUS D- D+ SHLD J 08- J Header CSn RESn 0 R/W E D0 D D 8 D 9 D 0 D D D VDD VSS Vout Cap- Cap+ 8 Cap- 9 Cap- 0 Cap+ V V V V V VDD C8 8 Shield 0 J DisplayTech8a C 0u Vbat V V.V.V C 0u D0 D D D D D D D D0 D D D D D D D LCD_0 LCD_RW Int_CLK nalog_in CSn Ext_CLK DO LCD_E LCD_E LCD_RW LCD_0 Index.V MagINCn MagDECn _out _out Int_DO Int_CLK PWM Int_CSn DS LED_R DS LED_R DS LED_Y DS LED_G DS LED_G R8 k R9 k R0 k R k R k J Header R.k R k C8 u nalog_in DS LED R k J PWM R 0k C 00n V V V C u/v C u/v C u/v C u/v C u/v C8 u/v C0 u/v C u/v C9 u/v R C 00n C 00n V CCK CD C 00n C u P0. P0.0 P. P. P. P. P. P. P. P.0 8 P. 9 P. 0 P. P. P. P. P. P.0 P0. P0. 8 P0. 9 P0. 0 P0. P0. D+ D- VDD RegIn VUS 8 RST/CCK 9 P.0/CD 0 U C80F0 C u V C u V R R L_ Vout Vin U S0-0 D LL00 C u D S0-0 Vbat R 8R LCD acklight Ind D..0 C 0n Index MagINCn MagDECn Dec I 9V attery US ISP R 8k.V J Header V.V CSn CLK DO.V V Ext_CSn Ext_CLK Ext_DO External eoder SW MCLSS_DPDT Int_DO DO CSn INT_CSn MagINCn MagDECn Index VSS DO CLK CSn PWM VDDV 8 VDDV 9 0 U S Fcko Fcki VSS SS/ SCK MISO MOSI LFLG/ 8 DFLG/ 9 INDEX/ 0 CNT_EN VDD U LS Y 0MHz C p C p C 00n.V SCK MISO MOSI SS/ SCK MISO MOSI SS/ Reset_CNT J8 Header P Jumper P Jumper S SW-P R k.v R M J9 Reset_CNT Figure : S Demoboard schematics

5 S Demoboard OPERTIONL MNUL Figure : S Demoboard PC Layout Revision.0, 0 pril Page of 9

6 S Demoboard OPERTIONL MNUL Index General Overview... The S Demoboard... Operating the S Demoboard.... Hardware Indicators and Connectors..... Graphic LCD display..... PWM LED..... Iremental quadrature -Index LED..... MagINCn and MagDECn..... Eoder selection switch... S Demoboard bloc diagram, schematics, layout... Index... Revision History... Contact... 8 Copyright... 9 Revision.0, 0 pril Page of 9

7 S Demoboard OPERTIONL MNUL Revision History Revision Date Description R.0 March., 009 First version Revision.0, 0 pril Page of 9

8 S Demoboard OPERTIONL MNUL Contact Headquarters 8 Schloss Premstätten, ustria Phone: Fax: + 0 industry.medical@austriamicrosystems.com Sales Offices austriamicrosystems Germany GmbH Tegernseer Landstrasse 8 D-89 Mühen, Germany Phone: Fax: austriamicrosystems Italy S.r.l. Via. Volta, 8 I-009 Corsico (MI), Italy Phone: Fax: austriamicrosystems Frae S..R.L., venue de Paris F-900 Viennes, Frae Phone: Fax: austriamicrosystems Switzerland G Rietstrasse CH 80 Rapperswil, Switzerland Phone: Fax: austriamicrosystems UK, Ltd. 88, arkham Ride, Fihampstead, Wokingham erkshire RG0 ET, United Kingdom Phone: Fax: Klaavuntie 9 G FI 0090 Helsinki, Finland Phone: Fax: ivägen S 9 Sollentuna, Sweden Phone: austriamicrosystems US, I. 80 Six Forks Road Suite 00 Raleigh, NC, US Phone: Fax: austriamicrosystems US, I. 00 Moorpark ve Suite San Jose, C 9, US Phone: Fax: Suite 8, Tsimshatsui Centre East Wing, Mody Road Tsim Sha Tsui East, Kowloon, Hong Kong Phone: Fax: IOS Gotanda nnex th Fl., --, Higashi-Gotanda, Shinagawa-ku Tokyo -00, Japan Phone: Fax: #80, Dong Kyung ldg., 8-9, Yeok Sam Dong, Kang Nam Gu, Seoul Korea -080 Phone: +8 8 Fax: Singapore Representative Office 8 Clemeeau venue, #0-0 UE Square 990, Singapore Phone: Fax: + 0 Revision.0, 0 pril Page 8 of 9

9 S Demoboard OPERTIONL MNUL Copyright Devices sold by austriamicrosystems are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems 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 austriamicrosystems for current information. This product is intended for use in normal commercial applications. Copyright 009 austriamicrosystems. Trademarks registered. ll rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. To the best of its knowledge, austriamicrosystems asserts that the information contained in this publication is accurate and correct. However, austriamicrosystems shall not be liable to recipient or any third party for any damages, iluding but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, iidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performae or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems rendering of technical or other services. Revision.0, 0 pril Page 9 of 9