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®2338/LTC2337/LTC2336/LTC2328/LTC2327/ peak-to-peak noise and DC linearity. Use the DC718 if LTC2326 are true bipolar, low power, low noise ADCs precise sampling rates are required or to demonstrate AC with serial outputs that can operate from a single 5V performance such as SNR, THD, SINAD and SFDR. The supply. The following text refers to the LTC2338-18 but demonstration circuit 1908A is intended to demonstrate applies to all parts in the family, the only difference being recommended grounding, component placement and the maximum sample rates and the number of bits. The selection, routing and bypassing for this ADC. Suggested LTC2338-18 supports a ±20.48V fully differential input driver circuits for the analog inputs will be presented. range with a 100dB SNR, consumes only 50mW and Design files for this circuit board are available at achieves ±4LSB INL max with no missing codes at 18 http://www.linear.com/demo or scan the QR code on bits. The DC1908A demonstrates the DC and AC perfor- the back of the board. mance of the LTC2338-18 in conjunction with the DC590 QuikEval™ and DC718 PScope™ data collection boards. 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 Use the DC590 to demonstrate DC performance such as property of their respective owners. BOARD PHOTO -16V GND +16V 100MHz Max 3.3Vpp TO AIN+ DC718 ±10.24V AIN- ±10.24V 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 Complete software documentation is available from the as shown in the connection diagram of Figure 1. The de- Help menu. Updates can be downloaded from the Tools fault connections configure the ADC to use the internal menu. Check for updates periodically as new features reference. The analog input is DC coupled. Connect the may be added. DC1908A to a DC718 USB high speed data collection The PScope software should recognize the DC1908A and board using connector P1. Then, connect the DC718 to configure itself automatically. a host PC with a standard USB A/B cable. Apply ±16V to the indicated terminals. Then apply a low jitter signal Click the Collect button (See Figure 4) to begin acquiring source to AIN+ (J4). Connect a low jitter 62MHz 3.3V data. The Collect button then changes to Pause, which P-P sine wave or square wave to CLK IN (J1). Note that CLK can be clicked to stop data acquisition. IN has a 50Ω termination resistor to ground. 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, with a standard USB A/B cable. Connect the DC1908A to a make sure that VCCIO (JP6) of the DC590 is set to 3.3V DC590 USB serial controller using the supplied 14-conduc- before connecting the DC590 to the DC1908A. tor ribbon cable. Apply a signal source to AIN+ or AIN+ and AIN– depending on how the DC1908A is configured. To use the DC590 with the DC1908A, it is necessary to Run the QuikEval software supplied with the DC590 or apply ±16V and ground to the +16V, –16V and GND ter- download it from www.linear.com/software. The correct minals or disable amplifier U10 by moving R32 and R35 control panel will be loaded automatically. Click the COL- to R31 and R38 respectively. Disabling U10 will require LECT button (See Figure 5) to begin reading the ADC. that both AIN+ and AIN– (J6) be driven with a low output impedance signal source. Connect the DC590 to a host PC dc1908af 2

DEMO MANUAL DC1908A DC1908A SETUP DC Power applied at AIN+ and feed it to the ADC as shown in Figure 3. To bypass the single-ended-to-differential converter or The DC1908A requires ±16VDC and draws approximately buffer, disable amplifier U10 by moving R32 and R35 to 100mA from the positive supply. Most of this supply cur- R31 and R38 respectively. Disabling U10 will require that rent is consumed by the CPLD, op amps, regulators and both AIN+ and AIN– be driven with a low output imped- discrete logic on the board. The +16VDC input voltage ance signal source. powers the ADC through LT1763 regulators which pro- vide protection against accidental reverse bias. Additional Data Output regulators provide power for the CPLD and op amps. See Figure 1 for connection details. Parallel data output from this board (0V to 3.3V default), if not connected to the DC718, can be acquired by a logic Clock Source analyzer, and subsequently imported into a spreadsheet, or mathematical package depending on what form of You must provide a low jitter 3.3V sine or square wave P-P digital signal processing is desired. Alternatively, the to CLK IN. The clock input is AC coupled so the DC level data can be fed directly into an application circuit. Use of the clock signal is not important. A clock source like CLKOUT (Pin 3) of P1 to latch the data. The data can be the Rohde & Schwarz SMB100A is recommended. Even latched using either edge of this signal. The data output a good generator can start to produce noticeable jitter at signal levels at P1 can also be reduced to 0V to 2.5V if low frequencies. Therefore it is recommended for lower the application circuit cannot tolerate the higher voltage. sample rates to divide down a higher frequency clock to This is accomplished by moving the VCCIO jumper (JP3) the desired sample rate. The ratio of clock frequency to to the 2.5V position. conversion rate is 62:1 for 18-bit parts and 50:1 for 16- bit parts. If the clock input is to be driven with logic, it is Reference recommended that the 50Ω terminator (R5) be removed. Slow rising edges may compromise the SNR of the con- The default reference is the LTC2338-18 4.096V internal verter in the presence of high amplitude higher frequency reference. The LTC6655 5V external reference can be used input signals. by adding R37 and moving the REF jumper (JP2) to the EXT position. This will increase the input range at AIN+ Analog Input and AIN– to ±12.5V. Also, an external reference can be used by removing R37 and applying a reference voltage The default setup for the DC1908A requires that only AIN+ to the VREF (E3) terminal with the REF jumper in the EXT is driven. Versions A, B and C of the DC1908A convert the position. If an external reference is used it must settle single-ended signal at AIN+ to a fully-differential signal quickly in the presence of glitches on the REF pin. The that is then fed to the ADC as shown in Figure 2. Single- analog input range for an external reference is ±2.5 • V . ended versions D, E, F, G, H and I simply buffer the signal REF Figure 2. Single-Ended to Differential Converter Figure 3. Single-Ended Buffer dc1908af 3

DEMO MANUAL DC1908A DC1908A SETUP Data Collection input signal level is approximately –1dBFS. A typical FFT obtained with DC1908A is shown in Figure 4. Note that For SINAD, THD or SNR testing a low noise, low distortion to calculate the real SNR, the signal level (F1 amplitude = generator such as the Stanford Research DS360 should –1.030dB) has to be added back to the SNR that PScope be used. A low jitter RF oscillator such as the Rohde & displays. With the example shown in Figure 4 this means Schwarz SMB100A is used as the clock source. This demo that the actual SNR would be 99.54dB instead of the board is tested in house by attempting to duplicate the 98.51dB that PScope displays. Taking the RMS sum of the FFT plot shown on the front page of the LTC2338-18 data recalculated SNR and the THD yields a SINAD of 99.27dB sheet. This involves using a 62MHz clock source, along which is fairly close to the typical number for this ADC. with a sinusoidal generator at a frequency of 2.0kHz. The Figure 4. DC1908A PScope Screen Shot dc1908af 4

DEMO MANUAL DC1908A DC1908A SETUP There are a number of scenarios that can produce mis- and routing of the various components associated with leading results when evaluating an ADC. One that is the ADC. Here are some things to remember when lay- common is feeding the converter with a frequency, that ing out a board for the LTC2338-18. A ground plane is is a sub-multiple of the sample rate, and which will only necessary to obtain maximum performance. Keep bypass exercise a small subset of the possible output codes. capacitors as close to supply pins as possible. Use indi- The proper method is to pick an M/N frequency for the vidual low impedance returns for all bypass capacitors. input sine wave frequency. N is the number of samples Use of a symmetrical layout around the analog inputs will in the FFT. M is a prime number between one and N/2. minimize the effects of parasitic elements. Shield analog Multiply M/N by the sample rate to obtain the input sine input traces with ground to minimize coupling from other wave frequency. Another scenario that can yield poor traces. Keep traces as short as possible. results is if you do not have a signal generator capable of Component Selection ppm frequency accuracy or if it cannot be locked to the clock frequency. You can use an FFT with windowing to When driving a low noise, low distortion ADC such as reduce the “leakage” or spreading of the fundamental, to the LTC2338-18, component selection is important so get a close approximation of the ADC performance. If an as to not degrade performance. Resistors should have amplifier or clock source with poor phase noise is used, low values to minimize noise and distortion. Metal film the windowing will not improve the SNR. resistors are recommended to reduce distortion caused by self heating. Because of their low voltage coefficients, Layout to further reduce distortion NPO or silver mica capacitors As with any high performance ADC, this part is sensitive should be used. Any buffer used to drive the LTC2338-18 to layout. The area immediately surrounding the ADC on should have low distortion, low noise and a fast settling the DC1908A should be used as a guideline for placement, time such as the LT1469. dc1908af 5

DEMO MANUAL DC1908A DC1980A SETUP Figure 5. DC1908A QuikEval Screen Shot DC1980A JUMPERS Definitions 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 JP1 – EEPROM For Factory use only. Should be left in default setting. the WP position. JP2 – REF selects whether the LTC2338-18 internal refer- ence or an external reference voltage is used. The default setting is internal. dc1908af 6

DEMO MANUAL DC1908A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 1 12 C1, C2, C3, C4, C5, C7, C10, C13, C14, CAP., X7R, 0.1µF, 16V 10% 0603 NIC, NMC0603X7R104K16TRPF C15, C16, C56 2 6 C6, C9, C24, C26, C29, C48 CAP., X5R, 10µF, 6.3V 20% 0603 NIC, NMC0603X5R106M6.3TRPF4KF 3 2 C8, C45 CAP., X7R, 1µF, 16V 10% 0603 NIC, NMC0603X7R105K16TRPF 4 1 C11 CAP., X5R, 10µF, 10V 20% 0603 SAMSUNG, CL10A106MP8NNNC 5 6 C12, C17, C41, C43, C57, C60 CAP., X7R, 0.1µF, 25V 20% 0603 TDK, C1608X7R1E104M 6 0 C18, C42, C47, C58, C61 CAP., OPT, 0603 OPTION 7 0 C19 CAP., OPT, 0805 OPTION 8 1 C20 CAP., X7R, 47µF, 10V 10% 1210 MURATA, GRM32ER71A476KE15L 9 1 C21 CAP., X5R, 22µF, 25V 20% 1210 MURATA, GRM32ER61E226ME15 10 6 C22, C25, C28, C44, C51, C54 CAP., X7R, 1µF, 25V 10% 0603 TDK, C1608X7R1E105K 11 3 C23, C27, C30 CAP., X7R, 0.01µF, 6.3V 10% 0603 MURATA, GRM188R70J103KA01D 12 8 C31, C32, C33, C34, C35, C36, C37, C38 CAP., X7R, 0.1µF, 16V 10% 0402 NIC, NMC0402X7R104K16TRPF 13 0 C39, C40 CAP., OPT, 1206 OPTION 14 1 C46 CAP., X5R, 2.2µF, 10V 10% 0603 MURATA, GRM188R61A225KE34D 15 1 C49 CAP., NP0, 100pF, 25V 10% 0603 AVX, 06033A101KAT4A 16 1 C50 CAP., X7R, 0.01µF, 25V 10% 0603 MURATA, GRM188R71E103KA01D 17 2 C52, C53 CAP., X5R, 10µF, 25V 10% 0805 MURATA, GRM21BR61E106KA73L 18 2 C55, C59 CAP., X5R, 1µF, 50V 10% 0603 TDK, C1608X5R1H105KT 19 5 E1, E2, E4, E5, E9 TEST POINT, TURRET, 0.061 MILL-MAX, 2308-2-00-80-00-00-07-0 20 4 E3, E6, E7, E8 TEST POINT, TURRET, 0.094, PBF MILL- MAX, 2501-2-00-80-00-00-07-0 21 3 JP1, JP2, JP3 3-PIN SINGLE ROW HEADER, .100 SAMTEC, TSW-103-07-L-S 22 3 J1, J4, J6 CONNECTOR, BNC CONNEX, 112404 23 1 J3 HEADER, 2X7, 0.079" MOLEX, 87831-1420 24 1 J5 HEADER, 2X5, 0.100" SAMTEC, TSW-105-07-L-D 25 4 MH1, MH2, MH3, MH4 STANDOFF, NYLON 0.25" KEYSTONE, 8831 (SNAP ON) 26 1 P1 CONNECTOR, 40 PINS, SMT SAMTEC, TSW-120-07-L-D 27 4 R1, R3, R4, R8 RES., CHIP, 33Ω, 1/10W, 5% 0603 PANASONIC, ERJ-3GEYJ330V 28 7 R2, R6, R19, R24, R29, R43, R45 RES., CHIP, 1k, 1/10W, 1% 0603 YAGEO, RC0603JR-071KL 29 1 R5 RES., CHIP, 49.9Ω, 1/4W, 1% 1206 VISHAY, CRCW120649R9FKEA 30 2 R7, R13 RES., CHIP, 1k, 1/10W, 5% 0603 YAGEO, RC0603JR-071KL 31 6 R9, R14, R32, R33, R36, R39 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 32 4 R10, R11, R12, R40 RES., CHIP, 4.99k, 1/10W, 1% 0603 PANASONIC, ERJ-3EKF4991V 33 0 R15, R31, R34, R37, R38 RES., CHIP, OPT, 0603 OPTION 34 1 R17 RES., CHIP, 2k, 1/10W, 5% 0603 PANASONIC, ERJ-3GEYJ202V 35 1 R18 RES., CHIP, 249Ω, 1/10W, 1% 0603 YAGEO, RC0603FR-07249RL 36 3 R20, R22, R23 RES., CHIP, 1k, 1/16W, 5% 0402 YAGEO, RC0402JR-071KL 37 1 R21 RES., CHIP, 10k, 1/16W, 5% 0603 AAC, CR16-103JM 38 1 R25 RES., CHIP, 1.69k, 1/10W, 1% 0603 PANASONIC, ERJ-3EKF1691V 39 1 R26 RES., CHIP, 1.54k, 1/10W, 1% 0603 YAGEO, RC0603FR-071K54L 40 1 R27 RES., CHIP, 2.8k, 1/10W, 1% 0603 YAGEO, RC0603FR-072K8L 41 2 R28, R42 RES., CHIP, 11.5k, 1/10W, 1% 0603 YAGEO, RC0603FR-0711K5L 42 1 R30 RES., CHIP, 10k, 1/16W, 5% 0402 AAC, CR05-103JM 43 1 R46 RES., CHIP, 6.19k, 1/10W, 1% 0603 Vishay, CRCW06036K19FKEA 44 1 R47 RES., CHIP, 33Ω, 1/16W, 5% 0402 PANASONIC, ERJ-2GEJ330X dc1908af 7

DEMO MANUAL DC1908A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 45 2 U2, U4 IC, UNBUFFERED INVERTER, SC70-5 FAIRCHILD, NC7SVU04P5X 46 1 U3 IC, D FLIP-FLOP, US8 ON SEMI., NL17SZ74USG 47 3 U5, U13, U16 IC, MICROPOWER REGULATOR, SO-8 LINEAR TECH., LT1763CS8#PBF 48 1 U6 IC, SINGLE SPST BUS SWITCH, SC70-5 FAIRCHILD, NC7SZ66P5X 49 1 U7 IC, SERIAL EEPROM, TSSOP MICROCHIP, 24LC024-I/ST 50 2 U8, U9 IC, UHS INVERTER, SC70-5 FAIRCHILD, NC7SZ04P5X 51 1 U10 IC, DUAL OP-AMP LINEAR TECH., LT1469CS8#PBF 52 1 U11 IC, MAX II CPLD, TQFP100 ALTERA, EPM240GT100C5N 53 1 U12 IC, MICROPOWER REGULATOR, SO-8 LINEAR TECH., LT1763CS8-1.8#PBF 54 1 U14 IC, MICROPOWER REGULATOR, SO-8 LINEAR TECH., LT1763CS8-5#PBF 55 1 U15 IC, VOLTAGE REFERENCE, MSOP LINEAR TECH., LTC6655BHMS8-5#PBF 56 1 U17 IC, MICROPOWER NEG. REGULATOR, SOT-23 LINEAR TECH., LT1964ES5-SD#PBF 57 3 XJP1, XJP2, XJP3 SHUNT, 0.100 SAMTEC, SNT-100-BK-G 58 1 STENCIL SET (TOP & BOTTOM) STENCIL 1908A 59 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A (REV2) DC1908A-A 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2338CMS-18 3 0 R16 RE., CHIP, OPT, 0603 OPTION 4 1 R35 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 5 1 R41 RES., CHIP, 4.99k, 1/10W, 1% 0603 PANASONIC, ERJ-3EKF4991V 6 1 R44 RES., CHIP, 300Ω, 1/16W, 5% 0402 YAGEO, RC0402JR-07300RL 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-B 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2337CMS-18 3 0 R16 RE., CHIP, OPT, 0603 OPTION 4 1 R35 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 5 1 R41 RES., CHIP, 4.99k, 1/10W, 1% 0603 PANASONIC, ERJ-3EKF4991V 6 1 R44 RES., CHIP, 300Ω, 1/16W, 5% 0402 YAGEO, RC0402JR-07300RL 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-C 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2336CMS-18 3 0 R16 RE., CHIP, OPT, 0603 OPTION 4 1 R35 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 5 1 R41 RES., CHIP, 4.99k, 1/10W, 1% 0603 PANASONIC, ERJ-3EKF4991V 6 1 R44 RES., CHIP, 300Ω, 1/16W, 5% 0402 YAGEO, RC0402JR-07300RL 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-D 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2328CMS-18 3 1 R16 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 4 0 R35 RE., CHIP, OPT, 0603 OPTION 5 0 R41 RE., CHIP, OPT, 0603 OPTION dc1908af 8

DEMO MANUAL DC1908A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 6 1 R44 RES., CHIP, 300Ω, 1/16W, 5% 0402 YAGEO, RC0402JR-07300RL 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-E 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2327CMS-18 3 1 R16 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 4 0 R35 RE., CHIP, OPT, 0603 OPTION 5 0 R41 RE., CHIP, OPT, 0603 OPTION 6 1 R44 RES., CHIP, 300Ω, 1/16W, 5% 0402 YAGEO, RC0402JR-07300RL 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-F 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2326CMS-18 3 1 R16 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 4 0 R35 RE., CHIP, OPT, 0603 OPTION 5 0 R41 RE., CHIP, OPT, 0603 OPTION 6 1 R44 RES., CHIP, 300Ω, 1/16W, 5% 0402 YAGEO, RC0402JR-07300RL 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-G 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2328CMS-16 3 1 R16 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 4 0 R35 RE., CHIP, OPT, 0603 OPTION 5 0 R41 RE., CHIP, OPT, 0603 OPTION 6 1 R44 RES., CHIP, 0402 OPTION 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-H 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2327CMS-16 3 1 R16 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 4 0 R35 RE., CHIP, OPT, 0603 OPTION 5 0 R41 RE., CHIP, OPT, 0603 OPTION 6 1 R44 RES., CHIP, 0402 OPTION 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A DC1908A-I 1 1 GENERAL BOM DC1908A 2 1 U1 LOW POWER, LOW NOISE ADC LINEAR TECH., LTC2326CMS-16 3 1 R16 RES., CHIP, 0Ω, 1/10W, 0603 PANASONIC, ERJ-3GEY0R00V 4 0 R35 RE., CHIP, OPT, 0603 OPTION 5 0 R41 RE., CHIP, OPT, 0603 OPTION 6 1 R44 RES., CHIP, 0402 OPTION 7 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1908A dc1908af 9

DEMO MANUAL DC1908A SCHEMATIC DIAGRAM dc1908af 10

DEMO MANUAL DC1908A SCHEMATIC DIAGRAM dc1908af 11 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

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 applica- tion engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 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