SX8750EVKA

SX8750EVK Evaluation Tool for SX8750 USER GUIDE ADVANCED COMMUNICATIONS & SENSING SX8750EVK User Guide Evaluation Kit for SX8750 - Piezo Actuator drivers The main applications for this product are:
Capacitive actuator control GENERAL DESCRIPTION SX8750 is a device to drive piezo actuators. It operates from a 3V supply and generate 30V to drive an actuator. No coil or capacitor is used to increase the voltage, minimizing the number of externals and the size of the solution. The output is differential to drive the actuator with positive or negative voltage. The key features are:
2.65 - 3.6 V supply, -16 V to +30 V differential output



No coil, no external flying capacitor 2.4 - 4.8 V extended voltage mode I2C controlled 10-bit differential DAC Piezoelectric actuator control. EVK content The evaluation kit is composed of the following parts:


The evaluation board A USB cable to connect the board to the PC A CDROM with the installation files and the user guide MINIMAL CONFIGURATION

PC with MS Windows 2000/XP USB interface RECOMMENDED READING Programmable max positive, max negative voltage and slew rate limitation. Revision 1.0 / August 2012 ©2012 Semtech Corp.

Page 1 SX8750 Datasheet www.semtech.com SX8750EVK USER GUIDE ADVANCED COMMUNICATIONS & SENSING Table of Contents Section Page 1. Evaluation board overview ........................................ 3 2. Getting started........................................................... 4 3. 2.1. Software installation ........................................... 4 2.2. Running the GUI ................................................ 4 Section Page GUI overview ............................................................. 5 3.1. Menu and toolbar ............................................... 5 3.2. SX8750 controls................................................. 6 3.3. SX8750 register access ..................................... 6 3.4. Status bar ........................................................... 6 4. Board overview ........................................................ 7 5. Board schematics..................................................... 8 Revision 1.0 / August 2012 ©2012 Semtech Corp. Page 2 www.semtech.com SX8750EVK Evaluation Tool for SX8750 USER GUIDE ADVANCED COMMUNICATIONS & SENSING 1. Evaluation board overview The evaluation board is shown on Figure 1. The SX8750EVK is designed to evaluate the SX8750 behavior with the PoLight TLens or a 50nF capacitor load. The board is made with two separate areas. The Figure 1 shows the SX8750EVK top view. The separate areas are shown in the red and green squares. The power and USB interface is located inside the red square. The USB connector (1) connects the kit to the computer with the USB cable. The wire (2) supplies the USB interface circuit. A footprint for a connector (3) can be used to connect the board to an external power supply. The supply range is 2.4V-4.8V. It is possible to power the board with three voltages. The external voltage (VEXT) coming from connector (3), the USB voltage (VUSB) or the 3.3V regulated voltage from the LDO (VLDO). The jumper (4) should be set to the desired location. The wires on area (6) connect the USB interface to the main board shown in the green area. The SX8750 device (8) is connected with its few externals. By removing jumpers (7), it is possible to disconnect the SX8750 device to the supply, I2C communication and digital signals for direct control. The DAC output and all the SX8750 pins are available on P2 connector (9). The TLens can be connected on P1 connector (10). The default capacitor load wire connection (11) should be cut in that case. Figure 1. SX8750EVK top view Revision 1.0 / August 2012 ©2012 Semtech Corp. Page 3 www.semtech.com SX8750EVK Evaluation Tool for SX8750 ADVANCED COMMUNICATIONS & SENSING USER GUIDE 2. Getting started 2.1. Software installation Insert the CD into the CD-ROM drive of your computer. The installation should start automatically. If the installation does not start, launch the file “SX8750EvaluationKitSetup.exe“located at your CD ROM root directory. If the Microsoft.NET Framework is not installed it will be installed automatically (An internet connection is required). Choose the installation directory, when the installation is finished the GUI will launch. Figure 2. GUI Installation 2.2. Running the GUI Connect the board to your USB port and launch the GUI. The GUI can be launch from Windows “Start Menu>Programs>SX8750EVK>SX8750EVK”. The GUI automatically detects the board. Revision 1.0 / August 2012 ©2012 Semtech Corp. Page 4 www.semtech.com SX8750EVK Evaluation Tool for SX8750 ADVANCED COMMUNICATIONS & SENSING USER GUIDE 3. GUI overview The Graphic User Interface (GUI) is divided in 4 sections: 1. The menu and tool bar 2. The SX8750 controls 3. The SX8750 registers access 4. The status bar 1 2 3 4 Figure 3. GUI overview 3.1. Menu and toolbar The File menu gives the user the possibility to save or open a configuration. The Action menu suggests a list of actions to the user.

The Reset button performs a general call reset to reset the SX8750. The Refresh button actualizes the register view and control after a manual register write. Revision 1.0 / August 2012 ©2012 Semtech Corp. Page 5 www.semtech.com SX8750EVK Evaluation Tool for SX8750 ADVANCED COMMUNICATIONS & SENSING USER GUIDE
The Show Registers button displays a window with the SX8750 registers. This register view allows registers writing. The Help menu is related to the user guide document. The toolbar allows a direct access to the action triggered in the menu. 3.2. SX8750 controls The radio button and slider controls setup in an convenient way the SX8750 device via I2C writing to registers. The various controls are describes in Table 1. Controls Description Shutdown Controls the XSD pin to set the SX8750 in shutdown mode. In the shutdown mode the communication is disabled, the charge pump and the DACs are disabled. Low speed clock is disabled. Low power mode In low power mode, the SX8750 listens the I2C and performs no other action. This control should be set to OFF to check the DAC behavior. Low noise mode Enable / disable the low noise mode. Charge pump reduced voltage Limit VHV and the DAC maximum output voltage. Charge pump high impedance The charge pump controls the VHV pin. Setting to ON disable the charge pump during the low noise mode. DAC buffer high impedance Setting to ON disable the DAC during the low noise mode. I2C time-out In case the I2C communication is stuck, enabling the I2C time-out allows to reset the I2C interface. DAC value Slider to select the DAC output voltage Positive voltage is output on VAFP with VAFN =0V. Negative voltage is output on VAFN with VAFP=0V. DAC slew rate Limit the DAC slew rate. The 32.0V/ms setting does not limit the slew rate. Table 1 Control descriptions 3.3. SX8750 register access This control enables the write of 8 bits data in the selected register. The 8-bit address and data are in hexadecimal format, starting with the “0x” notation. To update the controls, a refresh should be done. 3.4. Status bar The status bar displays the GUI version and the EVK firmware version. When the EVK is connected, the connection status led is green. Revision 1.0 / August 2012 ©2012 Semtech Corp. Page 6 www.semtech.com SX8750EVK Evaluation Tool for SX8750 ADVANCED COMMUNICATIONS & SENSING USER GUIDE 4. Board overview Revision 1.0 / August 2012 ©2012 Semtech Corp. Page 7 www.semtech.com GND 1 Ferrite F1 5       SHDN    VOUT    VBOARD  5  VEXT W3 3  VIN VLDO W2 NC
!
!" 2 A 1 2 3 4 
  Ferrite VBUS DD+ SHLD 4 VBUS W1 ) VSS 4 USB 3 BOARD VOLTAGE SELECTOR       A GND  VEXT J8 GND GND GND GND GND GND GND GND GND GND PROG GND B T1G ICSPCLK ICSPDAT GND VDD VPP 6 5 4 3 2 1
!" 19
! 18 # !$

4  3  2 R4 1K J7 PGC/DPGD/D+ 12 MHz      ' R2 0R R1 10K MCLR/VPP GND 2 BOOT LOADER 1 ).//0 13 12 11 10 VBOARD  PICKIT Serial  GND Page 8 GND GATEWAY  2 1 20 ( ( GND RA0/IOCA0/D+/PGD RA1/IOCA1/D-/PGC RA3/IOCA3/MCLR/VPP RA4/AN3/IOCA3/OSC2/CLKOUT RA5/IOCA5/OSC1/CLKIN VUSB VDD RB4/AN10/IOCB4/SDI/SDA RC0/AN4/C12IN+/INT0/Vref+ RB5/AN11/IOCB5/RX/DT RC1/AN5/C12IN1-/INT1/VrefRB6/IOCB6/SCK/SCL RC2/AN6/P1D/C12IN2-/CVref/INT2 RB7/IOCB7/TX/CK RC3/AN7/P1C/C12IN3-/PGM RC4/P1B/C12OUT/SRQ RC5/CCP1/P1A/T0CKI RC6/AN8/SS/T13CKI/T1OSCI VSS RC7/AN9/SDO/T1OSCO VUSB VBOARD         16 15 14 7 6 5 8 9 ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) VDD GND B B4 C15 100nF VI2C ) A4 SCL  & B2 VSS  & SDA B1 ) ) ) XSD B3 # VDD VHV A3 VAFP VHV C13 100nF - 50V VSS ) C C14 50nF - 50V VAFN SCL SDA VAFP XSD VAFN + * 1 2 3 4 Header 4 U1 VDD A2 A1 VAFP VSS P2 VDD XSD SCL SDA VAFN VHV VAFP VSS VAFN SX8750 - CSP 1 2 3 4 5 6 7 8 MHDR1X8 Cannot open file D:\Data\SX872x\Datasheet\Picture s\Logos\semtech_std_logo_horiz Title D Size A4 Date: File: 3 Number Revision
 29.05.2012 Y:\users\..\PCB_E234V01B.SCHDOC Sheet of Drawn By: 4 , ONi www.semtech.com USER GUIDE 2 D SX8750EVK SX8750EVK VSS 1 GND   Evaluation Tool for SX8750 $+    # !$

            $
!
!"   - P1 VAFP VAFN C VBOARD
%&! Acquisition INTERFACES VUSB 17 1 ADVANCED COMMUNICATIONS & SENSING 2 POWER 5. Board schematics Revision 1.0 / August 2012 ©2012 Semtech Corp. 1 INTERFACES SX8750EVK Evaluation Tool for SX8750 ADVANCED COMMUNICATIONS & SENSING USER GUIDE © S e m te c h 2 0 1 2 A ll rig h ts re s e rv e d . R e p ro d u c tio n in w h o le o r in p a rt is p ro h ib ite d w ith o u t th e p rio r w ritte n c o n s e n t o f th e c o p y rig h t o w n e r. T h e in fo rm a tio n p re s e n te d in th is d o c u m e n t d o e s n o t fo rm p a rt o f a n y q u o ta tio n o r c o n tra c t, is b e lie v e d to b e a c c u ra te a n d re lia b le a n d m a y b e c h a n g e d w ith o u t n o tic e . N o lia b ility w ill b e a c c e p te d b y th e p u b lis h e r fo r a n y c o n s e q u e n c e o f its u s e . P u b lic a tio n th e re o f d o e s n o t c o n v e y n o r im p ly a n y lic e n s e u n d e r p a te n t o r o th e r in d u s tria l o r in te lle c tu a l p ro p e rty rig h ts . S e m te c h a s s u m e s n o re s p o n s ib ility o r lia b ility w h a ts o e v e r fo r a n y fa ilu re o r u n e x p e c te d o p e ra tio n re s u ltin g fro m m is u s e , n e g le c t im p ro p e r in s ta lla tio n , re p a ir o r im p ro p e r h a n d lin g o r u n u s u a l p h y s ic a l o r e le c tric a l s tre s s in c lu d in g , b u t n o t lim ite d to , e x p o s u re to p a ra m e te rs b e y o n d th e s p e c ifie d m a x im u m ra tin g s o r o p e ra tio n o u ts id e th e s p e c ifie d ra n g e . S E M T E C H P R O D U C T S A R E N O T D E S IG N E D , IN T E N D E D , A U T H O R IZ E D O R W A R R A N T E D T O B E S U IT A B L E F O R U S E IN L IF E -S U P P O R T A P P L IC A T IO N S , D E V IC E S O R S Y S T E M S O R O T H E R C R IT IC A L A P P L IC A T IO N S . IN C L U S IO N O F S E M T E C H P R O D U C T S IN S U C H A P P L IC A T IO N S IS U N D E R S T O O D T O B E U N D E R T A K E N S O L E L Y A T T H E C U S T O M E R ’S O W N R IS K . S h o u ld a c u s to m e r p u rc h a s e o r u s e S e m te c h p ro d u c ts fo r a n y s u c h u n a u th o riz e d a p p lic a tio n , th e c u s to m e r s h a ll in d e m n ify a n d h o ld S e m te c h a n d its o ffic e rs , e m p lo y e e s , s u b s id ia rie s , a ffilia te s , a n d d is trib u to rs h a rm le s s a g a in s t a ll c la im s , c o s ts d a m a g e s a n d a tto rn e y fe e s w h ic h c o u ld a ris e . A ll re fe re n c e d b ra n d s , p ro d u c t n a m e s , s e rv ic e n a m e s a n d tra d e m a rk s a re th e p ro p e rty o f th e ir re s p e c tiv e o w n e rs . Contact information Semtech Corporation Advanced Communications & Sensing Products E-mail: sales@semtech.comacsupport@semtech.comInternet: http://www.semtech.com USA 200 Flynn Road, Camarillo, CA 93012-8790. Tel: +1 805 498 2111 Fax: +1 805 498 3804 FAR EAST 12F, No. 89 Sec. 5, Nanking E. Road, Taipei, 105, TWN, R.O.C. Tel: +886 2 2748 3380 Fax: +886 2 2748 3390 EUROPE Semtech Ltd., Units 2 & 3, Park Court, Premier Way, Abbey Park Industrial Estate, Romsey, Hampshire, SO51 9DN. Tel: +44 (0)1794 527 600 Fax: +44 (0)1794 527 601 ISO9001 CERTIFIED Revision 1.0 / August 2012 ©2012 Semtech Corp. Page 9 www.semtech.com