DEMO MANUAL DC1908A LTC2338/LTC2337/LTC2336/ LTC2328/LTC2327/LTC2326 18-Bit/16-Bit,1Msps/500ksps/250ksps True Bipolar Low Power, Single Supply ADCs DESCRIPTION The LTC(R)2338/LTC2337/LTC2336/LTC2328/LTC2327/ LTC2326 are true bipolar, low power, low noise ADCs with serial outputs that can operate from a single 5V supply. The following text refers to the LTC2338-18 but applies to all parts in the family, the only difference being the maximum sample rates and the number of bits. The LTC2338-18 supports a 20.48V fully differential input range with a 100dB SNR, consumes only 50mW and achieves 4LSB INL max with no missing codes at 18 bits. The DC1908A demonstrates the DC and AC performance of the LTC233818 in conjunction with the DC590 QuikEvalTM and DC718 PScopeTM data collection boards. Use the DC590 to demonstrate DC performance such as peak-to-peak noise and DC linearity. Use the DC718 if precise sampling rates are required or to demonstrate AC performance such as SNR, THD, SINAD and SFDR. The demonstration circuit 1908A is intended to demonstrate recommended grounding, component placement and selection, routing and bypassing for this ADC. Suggested driver circuits for the analog inputs will be presented. Design files for this circuit board are available at http://www.linear.com/demo or scan the QR code on the back of the board. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and QuikEval, PScope are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BOARD PHOTO -16V GND +16V 100MHz Max 3.3Vpp TO DC718 AIN+ 10.24V AIN10.24V TO DC590 Figure 1. DC1908A Connection Diagram dc1908af 1 DEMO MANUAL DC1908A ASSEMBLY OPTIONS Table 1. DC1908A Assembly Options ASSEMBLY VERSION U1 PART NUMBER MAX CONVERSION RATE # OF BITS MAX CLK FREQUENCY AIN+ RANGE AIN- RANGE DC1908A-A LTC2338CMS-18 1Msps 18 62MHz 10.24V 10.24V DC1908A-B LTC2337CMS-18 500ksps 18 31MHz 10.24V 10.24V DC1908A-C LTC2336CMS-18 250ksps 18 15.5MHz 10.24V 10.24V DC1908A-D LTC2328CMS-18 1Msps 18 62MHz 10.24V Grounded Internally DC1908A-E LTC2327CMS-18 500ksps 18 31MHz 10.24V Grounded Internally DC1908A-F LTC2326CMS-18 250ksps 18 15.5MHz 10.24V Grounded Internally DC1908A-G LTC2328CMS-16 1Msps 16 50MHz 10.24V Grounded Internally DC1908A-H LTC2327CMS-16 500ksps 16 25MHz 10.24V Grounded Internally DC1908A-I LTC2326CMS-16 250ksps 16 12.5MHz 10.24V Grounded Internally DC718 QUICK START PROCEDURE Check to make sure that all switches and jumpers are set as shown in the connection diagram of Figure 1. The default connections configure the ADC to use the internal reference. The analog input is DC coupled. Connect the DC1908A to a DC718 USB high speed data collection board using connector P1. Then, connect the DC718 to a host PC with a standard USB A/B cable. Apply 16V to the indicated terminals. Then apply a low jitter signal source to AIN+ (J4). Connect a low jitter 62MHz 3.3VP-P sine wave or square wave to CLK IN (J1). Note that CLK IN has a 50 termination resistor to ground. Complete software documentation is available from the Help menu. Updates can be downloaded from the Tools menu. Check for updates periodically as new features may be added. The PScope software should recognize the DC1908A and configure itself automatically. Click the Collect button (See Figure 4) to begin acquiring data. The Collect button then changes to Pause, which can be clicked to stop data acquisition. Run the PScope software (Pscope.exe version K72 or later) supplied with the DC718 or download it from www. linear.com/software. DC590 SETUP IMPORTANT! To avoid damage to the DC1908A or DC590, make sure that VCCIO (JP6) of the DC590 is set to 3.3V before connecting the DC590 to the DC1908A. To use the DC590 with the DC1908A, it is necessary to apply 16V and ground to the +16V, -16V and GND terminals or disable amplifier U10 by moving R32 and R35 to R31 and R38 respectively. Disabling U10 will require that both AIN+ and AIN- (J6) be driven with a low output impedance signal source. Connect the DC590 to a host PC with a standard USB A/B cable. Connect the DC1908A to a DC590 USB serial controller using the supplied 14-conductor ribbon cable. Apply a signal source to AIN+ or AIN+ and AIN- depending on how the DC1908A is configured. Run the QuikEval software supplied with the DC590 or download it from www.linear.com/software. The correct control panel will be loaded automatically. Click the COLLECT button (See Figure 5) to begin reading the ADC. dc1908af 2 DEMO MANUAL DC1908A DC1908A SETUP DC Power The DC1908A requires 16VDC and draws approximately 100mA from the positive supply. Most of this supply current is consumed by the CPLD, op amps, regulators and discrete logic on the board. The +16VDC input voltage powers the ADC through LT1763 regulators which provide protection against accidental reverse bias. Additional regulators provide power for the CPLD and op amps. See Figure 1 for connection details. Clock Source You must provide a low jitter 3.3VP-P sine or square wave to CLK IN. The clock input is AC coupled so the DC level of the clock signal is not important. A clock source like the Rohde & Schwarz SMB100A is recommended. Even a good generator can start to produce noticeable jitter at low frequencies. Therefore it is recommended for lower sample rates to divide down a higher frequency clock to the desired sample rate. The ratio of clock frequency to conversion rate is 62:1 for 18-bit parts and 50:1 for 16bit parts. If the clock input is to be driven with logic, it is recommended that the 50 terminator (R5) be removed. Slow rising edges may compromise the SNR of the converter in the presence of high amplitude higher frequency input signals. applied at AIN+ and feed it to the ADC as shown in Figure 3. To bypass the single-ended-to-differential converter or buffer, disable amplifier U10 by moving R32 and R35 to R31 and R38 respectively. Disabling U10 will require that both AIN+ and AIN- be driven with a low output impedance signal source. Data Output Parallel data output from this board (0V to 3.3V default), if not connected to the DC718, can be acquired by a logic analyzer, and subsequently imported into a spreadsheet, or mathematical package depending on what form of digital signal processing is desired. Alternatively, the data can be fed directly into an application circuit. Use CLKOUT (Pin 3) of P1 to latch the data. The data can be latched using either edge of this signal. The data output signal levels at P1 can also be reduced to 0V to 2.5V if the application circuit cannot tolerate the higher voltage. This is accomplished by moving the VCCIO jumper (JP3) to the 2.5V position. Reference The default setup for the DC1908A requires that only AIN+ is driven. Versions A, B and C of the DC1908A convert the single-ended signal at AIN+ to a fully-differential signal that is then fed to the ADC as shown in Figure 2. Singleended versions D, E, F, G, H and I simply buffer the signal The default reference is the LTC2338-18 4.096V internal reference. The LTC6655 5V external reference can be used by adding R37 and moving the REF jumper (JP2) to the EXT position. This will increase the input range at AIN+ and AIN- to 12.5V. Also, an external reference can be used by removing R37 and applying a reference voltage to the VREF (E3) terminal with the REF jumper in the EXT position. If an external reference is used it must settle quickly in the presence of glitches on the REF pin. The analog input range for an external reference is 2.5 * VREF. Figure 2. Single-Ended to Differential Converter Figure 3. Single-Ended Buffer Analog Input dc1908af 3 DEMO MANUAL DC1908A DC1908A SETUP Data Collection For SINAD, THD or SNR testing a low noise, low distortion generator such as the Stanford Research DS360 should be used. A low jitter RF oscillator such as the Rohde & Schwarz SMB100A is used as the clock source. This demo board is tested in house by attempting to duplicate the FFT plot shown on the front page of the LTC2338-18 data sheet. This involves using a 62MHz clock source, along with a sinusoidal generator at a frequency of 2.0kHz. The input signal level is approximately -1dBFS. A typical FFT obtained with DC1908A is shown in Figure 4. Note that to calculate the real SNR, the signal level (F1 amplitude = -1.030dB) has to be added back to the SNR that PScope displays. With the example shown in Figure 4 this means that the actual SNR would be 99.54dB instead of the 98.51dB that PScope displays. Taking the RMS sum of the recalculated SNR and the THD yields a SINAD of 99.27dB which is fairly close to the typical number for this ADC. Figure 4. DC1908A PScope Screen Shot 4 dc1908af DEMO MANUAL DC1908A DC1908A SETUP There are a number of scenarios that can produce misleading results when evaluating an ADC. One that is common is feeding the converter with a frequency, that is a sub-multiple of the sample rate, and which will only exercise a small subset of the possible output codes. The proper method is to pick an M/N frequency for the input sine wave frequency. N is the number of samples in the FFT. M is a prime number between one and N/2. Multiply M/N by the sample rate to obtain the input sine wave frequency. Another scenario that can yield poor results is if you do not have a signal generator capable of ppm frequency accuracy or if it cannot be locked to the clock frequency. You can use an FFT with windowing to reduce the "leakage" or spreading of the fundamental, to get a close approximation of the ADC performance. If an amplifier or clock source with poor phase noise is used, the windowing will not improve the SNR. Layout As with any high performance ADC, this part is sensitive to layout. The area immediately surrounding the ADC on the DC1908A should be used as a guideline for placement, and routing of the various components associated with the ADC. Here are some things to remember when laying out a board for the LTC2338-18. A ground plane is necessary to obtain maximum performance. Keep bypass capacitors as close to supply pins as possible. Use individual low impedance returns for all bypass capacitors. Use of a symmetrical layout around the analog inputs will minimize the effects of parasitic elements. Shield analog input traces with ground to minimize coupling from other traces. Keep traces as short as possible. Component Selection When driving a low noise, low distortion ADC such as the LTC2338-18, component selection is important so as to not degrade performance. Resistors should have low values to minimize noise and distortion. Metal film resistors are recommended to reduce distortion caused by self heating. Because of their low voltage coefficients, to further reduce distortion NPO or silver mica capacitors should be used. Any buffer used to drive the LTC2338-18 should have low distortion, low noise and a fast settling time such as the LT1469. dc1908af 5 DEMO MANUAL DC1908A DC1980A SETUP Figure 5. DC1908A QuikEval Screen Shot DC1980A JUMPERS Definitions JP1 - EEPROM For Factory use only. Should be left in the WP position. JP3 - VCCIO sets the output levels at P1 to either 3.3V or 2.5V. Use 3.3V to interface to the DC718 which is the default setting. JP2 - REF selects whether the LTC2338-18 internal reference or an external reference voltage is used. The default setting is internal. dc1908af 6 DEMO MANUAL DC1908A PARTS LIST ITEM 1 QTY 12 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 6 2 1 6 0 0 1 1 6 3 8 0 1 1 1 2 2 5 4 3 3 1 1 4 1 4 7 1 2 6 4 0 1 1 3 1 1 1 1 2 1 1 1 REFERENCE C1, C2, C3, C4, C5, C7, C10, C13, C14, C15, C16, C56 C6, C9, C24, C26, C29, C48 C8, C45 C11 C12, C17, C41, C43, C57, C60 C18, C42, C47, C58, C61 C19 C20 C21 C22, C25, C28, C44, C51, C54 C23, C27, C30 C31, C32, C33, C34, C35, C36, C37, C38 C39, C40 C46 C49 C50 C52, C53 C55, C59 E1, E2, E4, E5, E9 E3, E6, E7, E8 JP1, JP2, JP3 J1, J4, J6 J3 J5 MH1, MH2, MH3, MH4 P1 R1, R3, R4, R8 R2, R6, R19, R24, R29, R43, R45 R5 R7, R13 R9, R14, R32, R33, R36, R39 R10, R11, R12, R40 R15, R31, R34, R37, R38 R17 R18 R20, R22, R23 R21 R25 R26 R27 R28, R42 R30 R46 R47 PART DESCRIPTION CAP., X7R, 0.1F, 16V 10% 0603 MANUFACTURER/PART NUMBER NIC, NMC0603X7R104K16TRPF CAP., X5R, 10F, 6.3V 20% 0603 CAP., X7R, 1F, 16V 10% 0603 CAP., X5R, 10F, 10V 20% 0603 CAP., X7R, 0.1F, 25V 20% 0603 CAP., OPT, 0603 CAP., OPT, 0805 CAP., X7R, 47F, 10V 10% 1210 CAP., X5R, 22F, 25V 20% 1210 CAP., X7R, 1F, 25V 10% 0603 CAP., X7R, 0.01F, 6.3V 10% 0603 CAP., X7R, 0.1F, 16V 10% 0402 CAP., OPT, 1206 CAP., X5R, 2.2F, 10V 10% 0603 CAP., NP0, 100pF, 25V 10% 0603 CAP., X7R, 0.01F, 25V 10% 0603 CAP., X5R, 10F, 25V 10% 0805 CAP., X5R, 1F, 50V 10% 0603 TEST POINT, TURRET, 0.061 TEST POINT, TURRET, 0.094, PBF 3-PIN SINGLE ROW HEADER, .100 CONNECTOR, BNC HEADER, 2X7, 0.079" HEADER, 2X5, 0.100" STANDOFF, NYLON 0.25" CONNECTOR, 40 PINS, SMT RES., CHIP, 33, 1/10W, 5% 0603 RES., CHIP, 1k, 1/10W, 1% 0603 RES., CHIP, 49.9, 1/4W, 1% 1206 RES., CHIP, 1k, 1/10W, 5% 0603 RES., CHIP, 0, 1/10W, 0603 RES., CHIP, 4.99k, 1/10W, 1% 0603 RES., CHIP, OPT, 0603 RES., CHIP, 2k, 1/10W, 5% 0603 RES., CHIP, 249, 1/10W, 1% 0603 RES., CHIP, 1k, 1/16W, 5% 0402 RES., CHIP, 10k, 1/16W, 5% 0603 RES., CHIP, 1.69k, 1/10W, 1% 0603 RES., CHIP, 1.54k, 1/10W, 1% 0603 RES., CHIP, 2.8k, 1/10W, 1% 0603 RES., CHIP, 11.5k, 1/10W, 1% 0603 RES., CHIP, 10k, 1/16W, 5% 0402 RES., CHIP, 6.19k, 1/10W, 1% 0603 RES., CHIP, 33, 1/16W, 5% 0402 NIC, NMC0603X5R106M6.3TRPF4KF NIC, NMC0603X7R105K16TRPF SAMSUNG, CL10A106MP8NNNC TDK, C1608X7R1E104M OPTION OPTION MURATA, GRM32ER71A476KE15L MURATA, GRM32ER61E226ME15 TDK, C1608X7R1E105K MURATA, GRM188R70J103KA01D NIC, NMC0402X7R104K16TRPF OPTION MURATA, GRM188R61A225KE34D AVX, 06033A101KAT4A MURATA, GRM188R71E103KA01D MURATA, GRM21BR61E106KA73L TDK, C1608X5R1H105KT MILL-MAX, 2308-2-00-80-00-00-07-0 MILL- MAX, 2501-2-00-80-00-00-07-0 SAMTEC, TSW-103-07-L-S CONNEX, 112404 MOLEX, 87831-1420 SAMTEC, TSW-105-07-L-D KEYSTONE, 8831 (SNAP ON) SAMTEC, TSW-120-07-L-D PANASONIC, ERJ-3GEYJ330V YAGEO, RC0603JR-071KL VISHAY, CRCW120649R9FKEA YAGEO, RC0603JR-071KL PANASONIC, ERJ-3GEY0R00V PANASONIC, ERJ-3EKF4991V OPTION PANASONIC, ERJ-3GEYJ202V YAGEO, RC0603FR-07249RL YAGEO, RC0402JR-071KL AAC, CR16-103JM PANASONIC, ERJ-3EKF1691V YAGEO, RC0603FR-071K54L YAGEO, RC0603FR-072K8L YAGEO, RC0603FR-0711K5L AAC, CR05-103JM Vishay, CRCW06036K19FKEA PANASONIC, ERJ-2GEJ330X dc1908af 7 DEMO MANUAL DC1908A PARTS LIST ITEM QTY 45 2 46 1 47 3 48 1 49 1 50 2 51 1 52 1 53 1 54 1 55 1 56 1 57 3 58 1 59 1 DC1908A-A 1 1 2 1 3 0 4 1 5 1 6 1 7 1 DC1908A-B 1 1 2 1 3 0 4 1 5 1 6 1 7 1 DC1908A-C 1 1 2 1 3 0 4 1 5 1 6 1 7 1 DC1908A-D 1 1 2 1 3 1 4 0 5 0 REFERENCE U2, U4 U3 U5, U13, U16 U6 U7 U8, U9 U10 U11 U12 U14 U15 U17 XJP1, XJP2, XJP3 PART DESCRIPTION IC, UNBUFFERED INVERTER, SC70-5 IC, D FLIP-FLOP, US8 IC, MICROPOWER REGULATOR, SO-8 IC, SINGLE SPST BUS SWITCH, SC70-5 IC, SERIAL EEPROM, TSSOP IC, UHS INVERTER, SC70-5 IC, DUAL OP-AMP IC, MAX II CPLD, TQFP100 IC, MICROPOWER REGULATOR, SO-8 IC, MICROPOWER REGULATOR, SO-8 IC, VOLTAGE REFERENCE, MSOP IC, MICROPOWER NEG. REGULATOR, SOT-23 SHUNT, 0.100 STENCIL SET (TOP & BOTTOM) FAB, PRINTED CIRCUIT BOARD MANUFACTURER/PART NUMBER FAIRCHILD, NC7SVU04P5X ON SEMI., NL17SZ74USG LINEAR TECH., LT1763CS8#PBF FAIRCHILD, NC7SZ66P5X MICROCHIP, 24LC024-I/ST FAIRCHILD, NC7SZ04P5X LINEAR TECH., LT1469CS8#PBF ALTERA, EPM240GT100C5N LINEAR TECH., LT1763CS8-1.8#PBF LINEAR TECH., LT1763CS8-5#PBF LINEAR TECH., LTC6655BHMS8-5#PBF LINEAR TECH., LT1964ES5-SD#PBF SAMTEC, SNT-100-BK-G STENCIL 1908A DEMO CIRCUIT 1908A (REV2) U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RE., CHIP, OPT, 0603 RES., CHIP, 0, 1/10W, 0603 RES., CHIP, 4.99k, 1/10W, 1% 0603 RES., CHIP, 300, 1/16W, 5% 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2338CMS-18 OPTION PANASONIC, ERJ-3GEY0R00V PANASONIC, ERJ-3EKF4991V YAGEO, RC0402JR-07300RL DEMO CIRCUIT 1908A U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RE., CHIP, OPT, 0603 RES., CHIP, 0, 1/10W, 0603 RES., CHIP, 4.99k, 1/10W, 1% 0603 RES., CHIP, 300, 1/16W, 5% 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2337CMS-18 OPTION PANASONIC, ERJ-3GEY0R00V PANASONIC, ERJ-3EKF4991V YAGEO, RC0402JR-07300RL DEMO CIRCUIT 1908A U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RE., CHIP, OPT, 0603 RES., CHIP, 0, 1/10W, 0603 RES., CHIP, 4.99k, 1/10W, 1% 0603 RES., CHIP, 300, 1/16W, 5% 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2336CMS-18 OPTION PANASONIC, ERJ-3GEY0R00V PANASONIC, ERJ-3EKF4991V YAGEO, RC0402JR-07300RL DEMO CIRCUIT 1908A GENERAL BOM LOW POWER, LOW NOISE ADC RES., CHIP, 0, 1/10W, 0603 RE., CHIP, OPT, 0603 RE., CHIP, OPT, 0603 DC1908A LINEAR TECH., LTC2328CMS-18 PANASONIC, ERJ-3GEY0R00V OPTION OPTION U1 R16 R35 R41 dc1908af 8 DEMO MANUAL DC1908A PARTS LIST ITEM QTY 6 1 7 1 DC1908A-E 1 1 2 1 3 1 4 0 5 0 6 1 7 1 DC1908A-F 1 1 2 1 3 1 4 0 5 0 6 1 7 1 DC1908A-G 1 1 1 2 3 1 4 0 5 0 6 1 7 1 DC1908A-H 1 1 2 1 3 1 4 0 5 0 6 1 7 1 DC1908A-I 1 1 2 1 3 1 4 0 5 0 6 1 7 1 REFERENCE R44 PART DESCRIPTION RES., CHIP, 300, 1/16W, 5% 0402 FAB, PRINTED CIRCUIT BOARD MANUFACTURER/PART NUMBER YAGEO, RC0402JR-07300RL DEMO CIRCUIT 1908A U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RES., CHIP, 0, 1/10W, 0603 RE., CHIP, OPT, 0603 RE., CHIP, OPT, 0603 RES., CHIP, 300, 1/16W, 5% 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2327CMS-18 PANASONIC, ERJ-3GEY0R00V OPTION OPTION YAGEO, RC0402JR-07300RL DEMO CIRCUIT 1908A U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RES., CHIP, 0, 1/10W, 0603 RE., CHIP, OPT, 0603 RE., CHIP, OPT, 0603 RES., CHIP, 300, 1/16W, 5% 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2326CMS-18 PANASONIC, ERJ-3GEY0R00V OPTION OPTION YAGEO, RC0402JR-07300RL DEMO CIRCUIT 1908A U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RES., CHIP, 0, 1/10W, 0603 RE., CHIP, OPT, 0603 RE., CHIP, OPT, 0603 RES., CHIP, 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2328CMS-16 PANASONIC, ERJ-3GEY0R00V OPTION OPTION OPTION DEMO CIRCUIT 1908A U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RES., CHIP, 0, 1/10W, 0603 RE., CHIP, OPT, 0603 RE., CHIP, OPT, 0603 RES., CHIP, 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2327CMS-16 PANASONIC, ERJ-3GEY0R00V OPTION OPTION OPTION DEMO CIRCUIT 1908A U1 R16 R35 R41 R44 GENERAL BOM LOW POWER, LOW NOISE ADC RES., CHIP, 0, 1/10W, 0603 RE., CHIP, OPT, 0603 RE., CHIP, OPT, 0603 RES., CHIP, 0402 FAB, PRINTED CIRCUIT BOARD DC1908A LINEAR TECH., LTC2326CMS-16 PANASONIC, ERJ-3GEY0R00V OPTION OPTION OPTION DEMO CIRCUIT 1908A dc1908af 9 DEMO MANUAL DC1908A SCHEMATIC DIAGRAM dc1908af 10 DEMO MANUAL DC1908A SCHEMATIC DIAGRAM dc1908af 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. 11 DEMO MANUAL DC1908A 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 30 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 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright (c) 2004, Linear Technology Corporation dc1908af 12 Linear Technology Corporation LT 0713 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2013