DEMO MANUAL DC08A LTC07A, LTC0A, LTC07A-, LTC0A-, LTC6-, LTC-, -Bit,.Msps/Msps/.8Msps SAR ADCs Description Demonstration circuit 08A features the LTC 07 family of SAR ADCs. This quick start guide will focus on DC08A-A which uses the LTC07A-, a bipolar, -channel, -bit, simultaneous sampling ADC. Total throughput is Msps;.Msps per channel, with a typical channel-to-channel aperture skew of 00ps. Other family members have bits (LTC0, LTC07, LTC- and LTC6-) or one channel (LTC0, LTC0A, LTC- and LTC6-). The LTC07 family also has unipolar and bipolar versions. See Table for the specific version of DC08A that best suits your appli- cation. DC08A demonstrates the AC performance of the LTC07 family in conjunction with the DC890 data collection board and PScope software. Alternatively, by connecting DC08A into a customer application the performance of the LTC07 family member can be evaluated directly in that circuit. Design files for this circuit board are available at http://www.linear.com/demo L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PScope is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. DC08A Configuration Summary VERSION PART NUMBER OF BITS INPUT RANGE SAMPLE RATE NUMBER OF CHANNELS DC08A-A LTC07ACMSE- ±.V Msps (.Msps/Ch) DC08A-B LTC07ACMSE 0V to.v Msps (.Msps/Ch) DC08A-C LTC0ACMSE- ±.V.8Msps DC08A-D LTC0ACMSE 0V to.v.8msps DC08A-E LTC6CMSE- ±.V.Msps DC08A-F LTCCMSE- 0V to.v.msps DC08af
DEMO MANUAL DC08A Quick Start Procedure To DC890 Figure. DC08A Connection Diagram n Connect DC08A to a DC890 USB high speed data collection board, using connector J. n Connect DC890 to a host PC with a standard USB A/B cable. n Apply V to 7V DC to the VIN and terminals. n Apply a low jitter signal source to J (CH0) and J (CH), if applicable. Both J and J, if included, are terminated with 0Ω to ground. n As a clock source, apply a low jitter MHz (0.MHz for LTC0, 6MHz for LTC and LTC6).V P-P sine wave or square wave to connector J. e that J has a 0Ω termination resistor to ground. n Run the PScope software (Pscope.exe version K6, or later) supplied with the DC890, or download it from www.linear.com/software. 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. DC08af
DEMO MANUAL DC08A Software Configuration The PScope software should recognize DC08A and configure itself automatically. Click the Collect button (See Figure ) to begin acquiring data. Depending on which board was previously used by PScope, it may be necessary to press Collect a second time. The Collect button then changes to Pause, which can be used to pause data acquisition. Figure. DC08A Screenshot DC08af
DEMO MANUAL DC08A Hardware Setup SIGNAL CONNECTIONS J to J: SMA connectors for CH0 and CH are differential inputs. These inputs have 0Ω termination resistors. Limit input voltage swings to.v P-P. For optimum performance, the input should be band limited to the frequencies of interest. These signals are capacitively coupled to the ADC inputs, as shipped from the factory. If the DC level of the signal applied is important, JPC-JPF must be properly configured (see schematic for details). J: DC890 Interface. Connect to DC890. J: Conversion Clock Input. This input has a 0Ω termination resistor, and is intended to be driven by a low jitter,.v P-P sine or square wave. To achieve the full AC performance of this part, the clock jitter should be kept under ps. This input is capacitively coupled so that the input clock can be either 0V to.v, or ±.6V so that level shifting is not required. To run at maximum conversion rate, apply a MHz signal for the LTC07, or 0.MHz signal for the LTC0, to this input. For the LTC and LTC6, apply a 6MHz signal to achieve the maximum conversion rate. GROUNDING AND POWER CONNECTION Connect a V to 7V power supply to the VIN and turret posts. For optimum performance, this supply should be floating with respect to any signal Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 9 C, C7, C, C, C, C7, CAP., X7R, 0.µF, 6V, 0%, 060 AVX, 060YC0KAT C8, C0, C C8, C CAP., X7R, 0.0µF, 0V, 0%, 060 AVX, 060C0KAT C, C9 CAP., XR, µf, 6V, 0%, 060 AVX, 060YD0MAT C9 CAP., X7R, µf, 6V, 0%, 060 TDK, C608X7RC0M C, C CAP., X7R,.0µF, 0V, 0%, 080 AVX, 080ZC0MATA 6 C CAP., XR, 00µF, 6.V, 0%, 0 AVX, 06D07MAT 7 C6, C0, C0 CAP., XR, 0µF, 6.V, 0%, 080 AVX, 0806D06MAT 8 C, C CAP., C0G, 7pF, 0V, 0%, 060 AVX, 060A70KAT 9 E-E TESTPOINT, TURRET, 0.09" MILL-MAX, 0--00-80-00-00-07-0 0 7 E-E6, E8, E9, E TESTPOINT, TURRET, 0.06" MILL-MAX, 08--00-80-00-00-07-0 JP JMP,, 0.00" SAMTEC, TSW-0-07-L-D J, J CON., SMA, 0Ω, EDGE-LAUNCH CONNEX, 7 R, R RES., CHIP, 0k, /6W, %, 060 AAC, CR6-0JM R RES., CHIP, 0, /6W, %, 060 AAC, CR6-00JM R RES., CHIP,.0, /6W, %, 060 AAC, CR6-R0JM 6 R RES., CHIP, 9.9, /W, %, 06 AAC, CR8-9R9FM 7 R7, R RES., CHIP, 9.9, /6W, %, 060 AAC, CR6-9R9FM 8 R8, R0, R, R, R9 RES., CHIP,.99k, /6W, %, 060 AAC, CR6-99FM 9 R, R, R RES., CHIP, k, /6W, %, 060 AAC, CR6-0JM 0 R, R6, R7 RES., CHIP,, /6W, %, 060 AAC, CR6-0JM R0 RES., CHIP,.7k, /6W, %, 060 AAC, CR6-7JM R, R RES., CHIP, 0, /6W, %, 060 AAC, CR6-JM DC08af
DEMO MANUAL DC08A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER U I.C., LTC8ES-., TSOT-, S LINEAR TECHNOLOGY, LTC8ES-.#PBF U I.C., LTC8ES-., TSOT-, S LINEAR TECHNOLOGY, LTC8ES-.#PBF U, U8, U0 I.C., ULP INVERTER, SC70- FAIRCHILD, NC7SVU0PX_NL 6 U6 I.C., SINGLE D, FLIP FLOP, US8 ON SEMI., NL7SZ7USG 7 0 U7 () I.C., NC7SZ66PX, SC70-8 U9 I.C., LC0, TSSOP-8 MICROCHIP, LC0-I /ST (PbF) 9 (STAND-OFF) STAND-OFF, NYLON 0." KEYSTONE, 88(SNAP-ON) DC08A-A Required Circuit Components DC08A DC08A GENERAL BOM C, C CAP., X7R,.0µF, 0V, 0%, 080 AVX, 080ZC0MATA C6, C7 CAP., C0G, 7pF, 0V, 0%, 060 AVX, 060A70KAT C8, C CAP., X7R, 0.µF, 6V, 0%, 060 AVX, 060YC0KAT T, T TRANSFORMER M/A-COM, MABAES0060 6 JP SOLDER JUMPER WIRE AWG FROM PIN 8 TO PIN 6 (SEE ASSY DRAWING) 7 J CON., SMA, 0Ω, EDGE-LAUNCH CONNEX, 7 8 E7, E0 TESTPOINT, TURRET, 0.06" MILL-MAX, 08--00-80-00-00-07-0 9 R9 RES., CHIP, 9.9, /W, %, 06 AAC, CR8-9R9FM 0 R6, R RES., CHIP, 0K, /6W, %, 060 AAC, CR6-0JM JPA: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPB: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPC: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPD: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPE: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 6 JPF: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 U I.C., LTC07ACMSE- MSE LINEAR TECHNOLOGY, LTC07ACMSE-#PBF DC08A-B Required Circuit Components DC08A DC08A GENERAL BOM C, C CAP., X7R,.0µF, 0V, 0%, 080 AVX, 080ZC0MATA C6, C7 CAP., C0G, 7pF, 0V, 0%, 060 AVX, 060A70KAT C8, C CAP., X7R, 0.µF, 6V, 0%, 060 AVX, 060YC0KAT 0 T, T () TRANSFORMER 6 JP SOLDER JUMPER WIRE AWG FROM PIN 8 TO PIN 6 (SEE ASSY DRAWING) 7 J CON., SMA, 0Ω, EDGE-LAUNCH CONNEX, 7 8 E7, E0 TESTPOINT, TURRET, 0.06" MILL-MAX, 08--00-80-00-00-07-0 9 R9 RES., CHIP, 9.9, /W, %, 06 AAC, CR8-9R9FM 0 R6, R RES., CHIP, 0k, /6W, %, 060 AAC, CR6-0JM JPA: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPB: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPC: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPD: (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M DC08af
DEMO MANUAL DC08A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 6 JPE: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 6 JPF: (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 U I.C., LTC07ACMSE MSE LINEAR TECHNOLOGY, LTC07ACMSE#PBF DC08A-C Required Circuit Components DC08A DC08A GENERAL BOM 0 C, C (NOT INSTALLED) CAP., 080 C6, C7 RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 C8, C (NOT INSTALLED) CAP., 060 T TRANSFORMER M/A-COM, MABAES0060 6 0 T (NOT INSTALLED) TRANSFORMER 7 JP SOLDER JUMPER WIRE AWG FROM PIN 6 TO PIN (SEE ASSY DRAWING) 8 0 J (NOT INSTALLED) 9 0 E7, E0 (NOT INSTALLED) TESTPOINT, TURRET, 0.06" 0 0 R9 (NOT INSTALLED) RES., CHIP, 06 0 R6, R (NOT INSTALLED) RES., CHIP, 060 JPA: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 JPB: () JPC: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPD: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 6 0 JPE: () 7 0 JPF: () 8 U I.C., LTC0ACMSE- MSE LINEAR TECHNOLOGY, LTC0ACMSE-#PBF DC08A-D Required Circuit Components DC08A DC08A GENERAL BOM 0 C, C (NOT INSTALLED) CAP., 080 C6, C7 RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 C8, C (NOT INSTALLED) CAP., 060 0 T () TRANSFORMER 6 0 T (NOT INSTALLED) TRANSFORMER 7 JP SOLDER JUMPER WIRE AWG FROM PIN 6 TO PIN (SEE ASSY DRAWING) 8 0 J (NOT INSTALLED) CON., SMA, 0Ω, EDGE-LAUNCH 9 0 E7, E0 (NOT INSTALLED) TESTPOINT, TURRET, 0.06" 0 0 R9 (NOT INSTALLED) RES., CHIP, 06 0 R6, R (NOT INSTALLED) RES., CHIP, 060 JPA: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 JPB: () JPC: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPD: (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 6 0 JPE: () 7 0 JPF: () 8 U I.C., LTC0ACMSE MSE LINEAR TECHNOLOGY, LTC0ACMSE#PBF DC08af
DEMO MANUAL DC08A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC08A-E Required Circuit Components DC08A DC08A GENERAL BOM 0 C, C (NOT INSTALLED) CAP., 080 C6, C7 RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 C8, C (NOT INSTALLED) CAP., 060 T TRANSFORMER M/A-COM, MABAES0060 6 0 T (NOT INSTALLED) TRANSFORMER 7 JP SOLDER JUMPER WIRE AWG FROM PIN 6 TO PIN (SEE ASSY DRAWING) 8 0 J (NOT INSTALLED) 9 0 E7, E0 (NOT INSTALLED) TESTPOINT, TURRET, 0.06" 0 0 R9 (NOT INSTALLED) RES., CHIP, 06 0 R6, R (NOT INSTALLED) RES., CHIP, 060 JPA: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 JPB: () JPC: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPD: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 6 0 JPE: () 7 0 JPF: () 8 U I.C., LTC6CMSE-, MSE LINEAR TECHNOLOGY, LTC6CMSE-#PBF DC08A-F Required Circuit Components DC08A DC08A GENERAL BOM 0 C, C (NOT INSTALLED) CAP., 080 C6, C7 RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 C8, C (NOT INSTALLED) CAP., 060 0 T () TRANSFORMER 6 0 T (NOT INSTALLED) TRANSFORMER 7 JP SOLDER JUMPER WIRE AWG FROM PIN 6 TO PIN (SEE ASSY DRAWING) 8 0 J (NOT INSTALLED) CON., SMA, 0Ω, EDGE-LAUNCH 9 0 E7, E0 (NOT INSTALLED) TESTPOINT, TURRET, 0.06" 0 0 R9 (NOT INSTALLED) RES., CHIP, 06 0 R6, R (NOT INSTALLED) RES., CHIP, 060 JPA: (-), () RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 0 JPB: () JPC: (-), (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M JPD: (-) RES., CHIP, 0, /6W, 060 AAC, CJ06-000 M 6 0 JPE: () 7 0 JPF: () 8 U I.C., LTCCMSE- MSE LINEAR TECHNOLOGY, LTCCMSE-#PBF DC08af 7
DEMO MANUAL DC08A Schematic Diagram C R CH+ E E6 E7 CH+ E0 J JPB NOT INSTALLED FOR LTC0 JPD JPE JPF C R 0K R6 C7 0.uF C8 C 7pF C 7pF VREF/ VREF/ C7 +.V R.0 C0 0uF 6.V C0 0uF 6.V R 0 VREF VIN -7VDC CONV_AT_ADC SCK_AT_ADC C8 0.uF E +.V U8 NC7SVU0PX D S C CONV_AT_ADC SDO_AT_ADC SCK_AT_ADC SPI JP J JPA R 9.9 R9 JPC uf T C C uf T 0K R C 0.uF C 0.uF C C6 E9 U CH- CH- CH+ CH- 6 C9 uf X7R 7 VDD EXPOSED PAD R8.99K R0.99K VREF CONV SDO SCK R7 9.9 0 8 9 R 0 E8 E C 00uF 6.V R 0 C6 0uF 6.V U LTC8ES-. IN U LTC8ES-. IN OUT SHDN BYP OUT SHDN BYP C 0.0uF C8 0.0uF C uf C9 uf +.V +.V E E DVCC.V AVCC.V VERSION TABLE Assembly Type U Bits Msps Input Range Channels JPA JPB JPC JPD JPE JPF J JP E7, E0 T T C, C C6, C7 C8, C R6, R R9 DC08A-A DC08A-B DC08A-C DC08A-D DC08A-E DC08A-F LTC07ACMSE- LTC07ACMSE LTC0ACMSE- LTC0ACMSE LTC6CMSE- LTCCMSE- Msps (.Msps/Ch) Msps (.Msps/Ch).8Msps.8Msps.Msps.Msps +/-.V 0V -.V +/-.V 0V -.V +/-.V 0V -.V - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Jumper Wire Pin 8 to Pin 6 Jumper Wire Pin 6 to Pin Jumper Wire Pin 6 to Pin uf 7pF 0 OHM 0 OHM 0.uF 0K 9.9 Stuff 0 Ohm 060 Resistors in Indicated Jumper Positions. CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CONTRACT NO. APPROVALS DATE DRAWN June Wu /7/06 TITLE CHECKED APPROVED ENGINEER Guy Hoover /7/06 DESIGNER SIZE TECHNOLOGY LTC07 FAMILY HIGH SPEED ADC 60 McCarthy Blvd. Milpitas, CA 90 Phone: (08)-900 Fax: (08)-007 CAGE CODE DWG NO REV DC08A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND 8, SCALE: 007 FILENAME: SHEET OF Wednesday, February SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. A Figure. LTC07 Family High Speed ADC 8 DC08af
DEMO MANUAL DC08A Schematic Diagram C R CH+ E E6 CH+ J NOT INSTALLED FOR LTC0 R 0K R6 R VREF/ VREF/ +.V VREF VIN -7VDC CONV_AT_ADC SCK_AT_ADC C8 +.V 0.uF D S C C 0.uF C9 uf X7R U8 NC7SVU0PX CONV_AT_ADC SDO_AT_ADC SCK_AT_ADC SPI JP E7 E0 J JPA JPB R 9.9 R9 JPF C uf T C C 0.uF C8 JPC JPD uf T C JPE 0K C 7pF E9 C7 U C7 0.uF C C 7pF C6 CH- CH- CH+ CH- 6 EXPOSED PAD 7 VDD R8.99K R0.99K R.0 C0 0uF 6.V VREF CONV 0 SDO 8 SCK 9 C0 0uF 6.V R7 9.9 R 0 R 0 E8 E E R 0 C 00uF 6.V C6 0uF 6.V U LTC8ES-. IN OUT C 0.0uF SHDN BYP U LTC8ES-. IN OUT SHDN BYP C8 0.0uF +.V C uf +.V C9 uf E E DVCC.V AVCC.V VERSION TABLE Assembly Type U Bits Msps Input Range Channels JPA JPB JPC JPD JPE JPF J JP E7, E0 T T C, C C6, C7 C8, C R6, R R9 DC08A-A DC08A-B DC08A-C DC08A-D DC08A-E DC08A-F LTC07ACMSE- LTC07ACMSE LTC0ACMSE- LTC0ACMSE LTC6CMSE- LTCCMSE- Msps (.Msps/Ch) Msps (.Msps/Ch).8Msps.8Msps.Msps.Msps +/-.V 0V -.V +/-.V 0V -.V +/-.V 0V -.V - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Jumper Wire Pin 8 to Pin 6 Jumper Wire Pin 6 to Pin Jumper Wire Pin 6 to Pin uf 7pF 0 OHM 0 OHM 0.uF 0K 9.9 Stuff 0 Ohm 060 Resistors in Indicated Jumper Positions. CONTRACT NO. 60 McCarthy Blvd. Milpitas, CA 90 Phone: (08)-900 TECHNOLOGY APPROVALS DATE Fax: (08)-007 DRAWN June Wu /7/06 TITLE LTC07 FAMILY CHECKED APPROVED HIGH SPEED ADC ENGINEER Guy Hoover /7/06 SIZE CAGE CODE DWG NO REV DESIGNER DC08A 0 SCALE: FILENAME: SHEET OF Friday, March 08, A Figure. LTC07 Family High Speed ADC 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. DC08af 9
DEMO MANUAL DC08A 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 0 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 60 McCarthy Blvd. Milpitas, CA 90 Copyright 00, Linear Technology Corporation 0 DC08af LT 0 PRINTED IN USA Linear Technology Corporation 60 McCarthy Blvd., Milpitas, CA 90-77 (08) -900 FAX: (08) -007 www.linear.com LINEAR TECHNOLOGY CORPORATION 0