DEMO MANUAL DC1795A LTC GHz Low Phase Noise, Low Jitter PLL with Clock Distribution. Description

Transcription

1 Description Demonstration circuit 79A features the LTC 69, a.ghz low phase noise, low jitter PLL with clock distribution. For ease of use, the DC79A comes installed with a MHz reference and a GHz VCSO, voltage controlled SAW oscillator with sine wave output. All differential inputs and outputs have." spaced SMA connectors. The DC79A has four AC coupled LVPECL outputs with Ω transmission lines making them suitable to drive Ω impedance instruments. The LVDS/CMOS output is DC coupled. The LTC69 s EZSync function is made available via a turret and an SMA connector. DEMO MANUAL DC79A LTC69.GHz Low Phase Noise, Low Jitter PLL with Clock Distribution For the evaluation of the LTC69 with other VCOs and references, the DC79A can be modified to accommodate different on-board or external components. It also allows the user the option of a passive or active loop filter. A DC9 USB serial controller board is used for SPI communication with the LTC69, controlled by the supplied ClockWizard software. Design files for this circuit board are available at L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and EZSync and ClockWizard are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Ribbon cable connection to DC9.V DC Supply, BNC & turret Stat Outputs, turrets LVDS/CMOS DC-coupled Outputs, SMA EZSync TM SYNC Input, SMA & turret PECL AC Coupled Outputs, SMA PECL AC Coupled Outputs, SMA V U (VCXO) DC Supply, turret External VCO Input, SMA U (VCO) DC Supply, turret PECL AC Coupled Outputs, SMA V DC Supply, BNC & turret External VCO Charge Pump Output, SMA and turret Active Loop Filter Op-amp (U) DC Supply, turret Frequency Reference Input, SMA PECL AC Coupled Outputs, SMA Figure. DC79A Connections

2 DEMO MANUAL DC79A Quick Start Procedure The DC79A is easy to set up to evaluate the performance of the LTC69. Follow the procedure below. The DC9 and ClockWizard application are required to control the DC79A through a personal computer (PC). DC9 Configuration Place the DC9 jumpers in the following positions (refer to Figure ): JP: EE - Must be in the EN position. JP: ISO - ON must be selected. JP: SW - ON must be selected. JP6: VCCIO -.V or V must be selected. This sets the SPI port to.v or V operation..v operation is recommended. Connect the DC9 to one of your computer s USB ports with the included USB cable. ClockWizard Installation The ClockWizard software is used to communicate with the LTC69. It uses the DC9 to translate between USB and SPI-compatible serial communications formats. It also includes advanced PLL design and simulation capabilities. The following are the ClockWizard system requirements: Windows Operating System: Windows XP, Windows Server, Windows Vista, Windows 7 Microsoft.NET. SP or later Windows Installer. or later Linear Technology s DC9 hardware J, ribbon cable connection to the DC79 J, USB connection to PC JP6 jumpers JP jumper JP jumpers Figure. DC9 Jumper and Connector Locations

3 DEMO MANUAL DC79A Quick Start Procedure Download the ClockWizard setup file at ClockWizard. Run the ClockWizard setup file and follow the instructions given on the screen. The setup file will verify and/or install Microsoft.NET and install the ClockWizard. Refer to the Help menu for software operation. DC79A Configuration. Connect the, V + =.V to.v, V + to.v and V + VCXO turrets to a power supply and apply power (see Figure and the Typical DC79A Requirements and Characteristics table).. Connect the DC9 to the DC79A with the provided ribbon cable.. Run the ClockWizard application.. In ClockWizard, click File > Load Settings and point to the LTC69_PECL_MHz.clkset file. The green STAT LED on the DC79A should turn on and the STAT LED should turn off indicating that the loop is locked at MHz. A MHz signal should be present on the PECL outputs. Be sure to power down or terminate any unused RF output with Ω, or poor spurious performance may result. Figure. ClockWizard Screenshot

4 DEMO MANUAL DC79A Quick Start Procedure Troubleshooting If the green LED does not illuminate, follow the instructions below:. Verify that you are able to communicate with the DC79A. The bottom status line in ClockWizard should read LTC69 and Comm Enabled.. Verify that V + =.V to.v, V + to.v and V + VCXO turrets have the correct voltages on them (see the Typical DC79A Requirements and Characteristics table).. Select Status Output = in ClockWizard s System Tab. Click Read All. See if the NO_VCO or NO_REF boxes in the second column are checked. a. If NO_REF is checked, verify the V + XO test point voltage is set to.v. Verify R7 is installed ( ohm) b. IF NO_VCO is checked, verify the components between U and U match the default BOM. Contact the factory for further troubleshooting. DC79A Reconfiguration The DC79A allows the use of a variety of references, VCOs and active or passive loop filters. The following covers the hardware reconfiguration of the DC79A. Refer to ClockWizard and the LTC69 data sheet to better understand how to change programmed parameters on the DC79A. LTC69 CLKSET Files The ClockWizard provides three different clkset files for evaluation purposes. These files were made for the default bill of materials. If board modifications are made, these files or the loop filter may need to be modified for the LTC69 to lock correctly.. LTC69_PECL_MHz.clkset: Produces a MHz output on PECL. All other outputs are powered down.. LTC69_Figure6_MHZ.clkset: Matches Figure 6 of the LTC69 data sheet. To sync outputs, refer to the EZSync Function section.. LTC69_ALL_CHAN_MHz.clkset: Produces a MHz output on all five outputs. To sync outputs, refer to the EZSync Function section. EZSync Function Apply a ms or longer high pulse to the SYNC SMA connector to take advantage of the EZSync function. Refer to the LTC69 data sheet for SYNC timing and level requirements. LVPECL Output Options The DC79A has four AC coupled LVPECL outputs. Internal biasing (IBIASx = H) is required with this default termination network. The DC79A has options for pull down or series resistors to accommodate the other LVPECL termination networks described in the data sheet. LVDS/CMOS Output Options The LVDS/CMOS output is DC coupled without on-board termination by default. The DC79A provides pull down, series and a differential termination resistor options to accommodate other termination networks described in the data sheet.

5 DEMO MANUAL DC79A DC79A Reconfiguration Reference Options Table details the available reference options and board modifications for each available option. The CLKSET files described above assume the noise profile of the default reference. If a different reference is used, change the reference noise profile in ClockWizard before simulating the LTC69 under the Loop Design tab. VCO Input Options Table describes the available VCO input options. Board modifications and power requirements for each option are also provided in Table. There are two different oscillator footprints on the board: U, which accommodates the popular."." package, and U, which accommodates another common mm 9mm package with four or six pins. U also accommodates the smaller mm 7.mm package. An external connectorized VCO can also drive the LTC69 through SMA connector J. The CLKSET files described above assume the noise profile for the default VCO. If a different VCO is used, change the VCO noise profile in ClockWizard before simulating the LTC69 under the Loop Design tab. Clock Follower When using the LTC69 as a clock follower the LTC69 s PLL circuitry can be powered down by setting the PDPLL bit in ClockWizard. This will reduce the LTC69 s overall power consumption. Table describes how to reconfigure the board for a differential external input when using the LTC69 as a clock follower. Refer to the EZSync Function section and to the data sheet for more details on using the LTC69 as a clock follower. Loop Filter Design and Installation Tables, and cross reference the loop filter options shown in ClockWizard s Loop Design tab with the DC79A component reference designators. Table is dedicated to the default oscillator, component U. Table is dedicated to another common oscillator footprint, component U. Table can be used with external oscillators. Use ClockWizard to select, design and simulate different loop filters. Some VCO tuning voltage ranges are greater than the LTC69 charge pump voltage range (refer to the LTC69 data sheet). In such cases, an active loop filter using an op amp can deliver the required tuning voltage. When satisfied with the loop filter design, use Tables, and to help identify which components should be modified. The loop filter components are located on the bottom side of the DC79A. Table. Reference Options and Board Modifications DEFAULT ION REFERENCE ION INSTALL DEPOPULATE LTC69 PERFORMANCE COMMENTS l On-Board NA NA External C67.µF R7, C7 Limited by on board reference at frequency offsets <khz Best performance when using an ultralow noise external reference U9 can accommodate any mm 7.mm or 9mm mm oscillator package For improved performance connect J to a very low noise reference, such as the Wenzel -7D

6 DEMO MANUAL DC79A DC79A Reconfiguration Table. VCO Input Options: Power Settings and Board Modifications DEFAULT ION BOARD MODIFICATIONS OSCILLATOR INSTALL DEPOPULATE l U NA (Default) U U, *C8 Ω Single-Ended External Differential External *C Ω *C, C6 Ω C69 ~pf NA (Default) V + OA TURRET [For Active Filters Only] Determined by U V TUNE specification. V for Default U. Must be less than V *R [For Active Filters Only] Determined by U V TUNE specification. Must be less than V *R, R, R *R, R, R [For Active Filters Only] Determined by External Oscillator V TUNE specification, must be less than V [For Active Filters Only] Determined by External Oscillator V TUNE specification, must be less than V OSCILLATOR POWER SETTINGS V + VXCO TURRET Determined by U V CC specification. V for Default U. Must be less than V V + VCO TURRET - Determined by U V CC specification. Must be less than V EN TURRET - Connects to pin of U. Not used with Default U COMMENTS Refer to Table : loop filter component selections for U - Refer to Table : loop filter component selections for U Connect signal to J. Refer to Table : loop filter component selections Connect signals to J and J. [For External Oscillator Only] Refer to Table : loop filter component selections. * General Recommendations: There are several termination and common mode options on the DC79A for different input signal types. Refer to the DC79A schematic, the LTC69 data sheet and the data sheet for the VCO or clock distribution component used for an optimum termination network. Table. Loop Filter Selection for U Oscillator (Refer to ClockWizard s Loop Design Tab) CLOCKWIZARD AND BOM CROSS REFERENCE OTHER MODIFICATIONS DEFAULT ION LOOP FILTER TYPE RZ CI CP R C L INSTALL DEPOPULATE COMMENTS l Filter (Passive) RZ_P CI_P + CI_P CP_P RZ_P, CI_P, CI_P, CP_P populated with default values Filter (Passive) RZ_P CI_P + CI_P CP_P R C Filter (Passive) RZ_P CI_P + CI_P CP_P R7 C R - - Filter (Active) RZ_A CI_A + CI_A CP_A R C - R69, R7 ( Ω) R7, R7 Select CPINV under the ClockWizard System tab Table. Loop Filter Selection for U Oscillator (Refer to ClockWizard s Loop Design Tab) DEFAULT CLOCKWIZARD AND BOM CROSS REFERENCE OTHER MODIFICATIONS ION LOOP FILTER TYPE RZ CI CP R C L INSTALL DEPOPULATE Filter (Passive) RZ_P CI_P + CI_P CP_P R8 R ( Ω) Filter (Passive) RZ_P CI_P + CI_P CP_P R8 C9 - R Filter (Passive) RZ_P CI_P + CI_P CP_P R7 C9 R8 - R 6 Filter (Active) RZ_A CI_A + CI_A CP_A R8 C9 - R69, R7 ( Ω) R, R7, R7 COMMENTS Select CPINV under the ClockWizard System tab

7 DEMO MANUAL DC79A DC79A Reconfiguration Table. Loop Filter Selection for External Oscillator (Refer to ClockWizard s Loop Design Tab) DEFAULT ION CLOCKWIZARD AND BOM CROSS REFERENCE OTHER MODIFICATIONS LOOP FILTER TYPE RZ CI CP INSTALL DEPOPULATE Filter (Passive) RZ_P CI_P + CI_P CP_P R68 ( Ω) Filter (Active) RZ_A CI_A + CI_A CP_A R67, R69 ( Ω) R7 COMMENTS Connect CPOUT turret to V TUNE of external oscillator R7, R7 Select CPINV under the ClockWizard System tab. Connect CPOUT turret to V TUNE of external oscillator Typical DC79A Requirements and Characteristics PARAMETER INPUT OR OUTPUT PHYSICAL LOCATION DETAILS.V Power Supply Input J BNC connector, or V + =.V to.v turret Charge Pump Power Supply Input J BNC connector, or V + to.v turret Low-noise and spur-free.v, ma default (ma configured*). Powers LTC69, U6, U7, U8 and U9 Low-noise and spur-free V, ma*. Powers LTC69 and provides common mode to U VCXO/VCSO Power Supply Input V + VCXO turret Low-noise and spur-free V, ma*. Powers U LVDS/CMOS +, LVDS/CMOS Two Outputs J9 and J8 SMA connectors** DC coupled, MHz, (if enabled)*. Refer to LTC69 data sheet for output levels for LVDS and CMOS option. PECL +, PECL Two Outputs J7 and J6 SMA connectors** AC coupled, MHz, 8mV P differential*. Must have LTC69 s IBIAS = H with default BOM. DC79A has options for an external pull down resistor if IBIAS = L. PECL +, PECL Two Outputs J and J SMA connectors** AC coupled, MHz, 8mV P differential (if enabled)*. Must PECL +, PECL Two Outputs J8 and J7 SMA connectors** have LTC69 s IBIASX = H with default BOM. DC79A has options for an external pull down resistor if IBIASX = L. PECL +, PECL Two Outputs J and J SMA connectors** SYNC Input SYNC turret or J9 SMA connector EZSync, V to.v control signal, refer to the data sheet STAT, STAT Output STAT and STAT turret STAT GREEN LED, if ON LTC69 is locked*. STAT RED LED, if ON indicates issue*. Refer to the troubleshooting section and data sheet Loop Bandwidth - Set by loop filter component values.khz* VCO Power Supply Input V + VCO turret Board Modifications required for use, see Table Active Loop Filter Supply Input V + OA turret Board Modifications required for use, see Table REF, External Reference Input J SMA connector Board Modifications required for use, see Table VCO +, VCO, External VCO or Input for clock distribution Input J and J SMA connectors Board Modifications required to use External VCO. See Tables and. Clock Distribution, see Table only CPOUT Output CPOUT Turret Used with External VCO, connect to external VCO s V TUNE voltage * These values are for the LTC69_PECL_MHz file and the default on board VCO and Reference. ** Any unused RF output must be powered down or terminated with Ω, or poor spurious performance may result. 7

8 DEMO MANUAL DC79A Layout Top Layer 8

9 DEMO MANUAL DC79A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CI_A, C, C9, CP_A CAP., CI_P CAP., X7R,.µF, V, %, AVX, CKATA CI_A CAP., 6 CI_P CAP., X7R,.6µF, V, %, 6 AVX, 6C6KATA CP_P CAP., X7R,.6µF, 6V, %, AVX, YC6KATA 6 C, C, C7 CAP., TANT, 7µF, V, %, 7 AVX, TAJD76MHNJ 7 C, C8 CAP., X7R, µf, V, %, AVX, ZCKATA 8 C, C9-C9, C-C8, C6 CAP., X7R,.µF, 6.V, %, AVX, 6CKATA 9 C, C, C CAP., X7R,.µF, V, %, 8 AVX, 8CKATA 9 C6, C8, C, C-C6, C9-C, C9-C8, C6-C66, C7, C7, C7 CAP., X7R,.µF, V, %, AVX, ZCKATA C, C, C9 CAP., TANT, 7µF, V, %, 76 AVX, TAJV76KRNJ C-C7, C8, C67, C69, C7 CAP., C68, C7 CAP., NPO, pf, V, %, AVX, AKATA D LED, GREEN, LED-ROHM-SML-FT ROHM, SML-FTT86L D LED, RED, LED-ROHM-SML-VT ROHM, SML-VTT86L 6 E-E, E6, E7, E, E TURRET, TESTPOINT.6" MILL-MAX, J, J CONN, BNC, PINS CONNEX, 8 J, J9 CONN., SMA Ω STRAIGHT MOUNT CONNEX, 9 J, J7, J8, J-J9 CONN., SMA Ω EDGE-LAUNCH EMERSON, -7-8 J CONN., HEADER, PIN, mm MOLEX, 878- RZ_P RES., CHIP, 96Ω, /6W, %, VISHAY, CRCW96RFKEA R, R, R, R, R RES., CHIP,.99k, /6W, % VISHAY, CRCWK99FKED R6, R9, R7, R9, R-R, R6, R-R, R6, R8, R, R6, R, R7, R6, R6 RES., R7, R6, R8, R9 RES., CHIP, 9.9, /6W, % VISHAY, CRCW9R9FKED R8, R, R, R, R6, R6-R66, R7-R78 RES., CHIP, Ω, VISHAY, CRCWZED 6 R, R, R7, R7, R7 RES., CHIP, Ω, YAGEO, RCJR-7RL 7 R-R, R, R8 RES., CHIP, K, /6W, % VISHAY, CRCWKFKED rls 8 R8, R67-R69, R7, RZ_A, R RES., 9 R, R, R, R9, R79 RES., CHIP,, /6W, % NIC, NRCFTRF R, R RES., CHIP,, /6W, % VISHAY, CRCWRFKED R7, R9 RES., CHIP,, /6W, % VISHAY, CRCWRFKED R RES., CHIP, 7., /6W, % VISHAY, CRCW7RFKED U I.C. LTC69IUHH, QFN8UHH-X9 LINEAR TECH., LTC69IUHH#PBF U I.C. LT678IS8, SO8 LINEAR TECH., LT678IS8#PBF U VCO,."." 6 U VCSO, GHz V CRYSTEK, CVCSO U I.C., SERIAL EEPROM, TSSOP8 MICROCHIP, LC-I /ST 8 U6, U7 I.C., DUAL BUFFER, SC7-6 FAIRCHILD SEMI., NC7WZ7P6X 9 U8 I.C., DUAL TRANSCEIVER, SOT6 NXP, 7LVCTGW U9 CLOCK OSCILLATOR, MHz,.V CRYSTEK, CCHD

10 A A B B C C D D 6 E E DEMO MANUAL DC79A Schematic Diagram REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE PRODUCTION MICHEL A. -- J9 LVDS/CMOS+ R6 R6 CS SDO SCLK SDI J8 E (ERR) STAT R6 R6 E E9 J9 (LOK) SYNC SYNC STAT J7 C6 R78 PECL+ R7 R R9 R7 R R6 R77 J6 C D RED D GRN R C6 J VCO+ SML-VT SML-MT C7 VCXO R PECL+ J C R76 C69 R8 9.9 C 8 C9 7uF V 76 R6 R R6 E6 U R8 + * J C9 REF REF+ SDO CS LV/CM+ LV/CM REF- REF CI_P VCC R RZ_P 96 R8 VCO C 8 J C67 CP_P.6uF 7uF 76 + REF C V R7 R9 C7 C8 R7 * R6 C7 RZ_A CP_A R7 CI_A 6 CI_A R7 R R8 R R68 C R6 9.9 E U9 R R69 CPOUT LVDS/CMOS- VCXO 6 E P VCXO U R7 6 LTC69IUHH C SCLK PECL+ J R6 C7 PECL- PECL- VCC 6 7 E8 R VTUNE SDI EN 8 EN OUT- R R 7. pf STAT P 9 OUT+ CVCSO-9- R STAT P R9 SYNC PECL+ R7 C 9.9 J8 C68 R PECL- PECL+ J C K P R VCO- R C8 R pf R66 C VCO P J7 VCO+ PECL+ PECL- PECL- VCO- 6 R E7 VCO P 7 C9 C8 CP P PECL+ R6 C 8 9 CI_P.6uF J VCO E6 VCO U PECL- R PECL+ CP RFOUT 6 CP P VTUNE R6 PECL- PECL- OUT+ OUT- EN VCC VTUNE CCHD-7-- J EN-XO R CP CPOUT R9 C7 R67 E7 XO R7 9.9 C66 R7 CP V- +INA -INA OA B C +INB -INB OUTB E OA C6 A 8 C OUTA R 6 McCarthy Blvd. U LT678IS8 +C 7uF CUSTOMER NOTICE APPROVALS Milpitas, CA 9 C 7uF.99K LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (8)-9 V 7 CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; V OA TECHNOLOGY Fax: (8)-7 76 R.99K HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. KIM T. LTC Confidential-For Customer Use Only VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. MICHEL A. TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT NOTE: UNLESS OTHERWISE SPECIFIED THE LAYOUT FOOTPRINT FOR U AND U9 ACCEPTS. ALL RESISTORS ARE IN OHMS, * PERFORMANCE OR RELIABILITY. CONTACT LINEAR. GHZ LOW PHASE NOISE, LOW JITTER PLL WITH CLOCK DISTRIBUTION TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. SIZE IC NO. REV. LTC69IUHH MOST OSCILLATORS IN 9mm X mm OR mm X N/A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND DEMO CIRCUIT 79A. ALL CAPACITORS ARE IN MICROFARADS, 7.mm PACKAGES WITH EITHER FOUR OR SIX PINS. SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE DATE: //, :7 PM SHEET OF +

11 A A B B DEMO MANUAL DC79A Schematic Diagram C D LTC69 BYPASS AND BULK CAPACITORS TO.V E CP C9 C C6 C6 C6 C6 C6 C7 C7 J BNC C.uF E V 7 + C 7uF C C C C C6 C7 C8 C6 =.V -.V E J BNC E V 7 + C7 7uF C8.uF C C9 C C C C C C C6 C7 C8 C9 J HDX7-79-MOLEX V CS 6 SCK/SCL MOSI/SDA 7 MISO DC9 SPI INTERFACE DIG CS SCLK SDI SDO R8 K U6 NC7WZ7P6X 6 VCC U7 NC7WZ7P6X 6 R R C6 R9 CS SCLK SDI EEVCC EESDA 9 EESCL EE AUX WP R.99K R.99K EE R.99K U LC-I /ST R R79 R K VCC SDO NOTE: EEPROM FOR BOARD IDENTIFICATION CUSTOMER NOTICE 6 McCarthy Blvd. APPROVALS Milpitas, CA 9 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (8)-9 CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (8)-7 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. KIM T. LTC Confidential-For Customer Use Only VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. MICHEL A. TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT. GHZ LOW PHASE NOISE, LOW JITTER PLL WITH CLOCK DISTRIBUTION PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. SIZE IC NO. REV. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE C D N/A DATE: LTC69IUHH DEMO CIRCUIT 79A //, :7 PM SHEET OF E E ARRAY EEPROM SCL SDA WP 6 7 VCC 8 A A A C U8 7LVCTGW 8 C R K 6 VCC(A) VCC(B) DIR C C R K Note: The buffers shown on sheet of of the schematic are used to protect the LTC69 when connected to the DC9 before the LTC69 is powered up. There is no need for such circuitry if the SPI bus is not active before powering up the LTC69. The EEPROM is for identification and is not needed to program the LTC69. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

12 DEMO MANUAL DC79A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 6 McCarthy Blvd. Milpitas, CA 9 Copyright, Linear Technology Corporation LT 7 PRINTED IN USA Linear Technology Corporation 6 McCarthy Blvd., Milpitas, CA 9-77 (8) -9 FAX: (8) -7 LINEAR TECHNOLOGY CORPORATION