DC890B - LINEAR TECHNOLOGY - Datasheet.Directory

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DEMO MANUAL DC890B

DESCRIPTION

DC890B QuickStart Guide

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.

BOARD PHOTO

Figure 1. DC890B Board

Demonstration circuit DC890B along with PScope™ soft-

ware provides a USB based Windows PC hosted digital

data acquisition system supporting CMOS/LVDS output

ADCs up to 250Msps. The DC890B must be powered from

an external 6VDC ±0.5VDC power supply when operat-

ing in LVDS mode. When operating in CMOS mode, the

external power supply is optional. The Linear Technology

supplied PScope evaluation software automatically detects

the DC890B and can also detect many of the standard

ADC demonstration circuits boards. The DC890B will

not enable LVDS mode unless an external 6.0VDC power

source is available. This system provides for fast and easy

performance evaluation of high speed ADCs. DC890B

collects up to 256K word samples and then performs

various analyses on the data including calculating SNR,

SINAD, THD, SFDR and ENOB. The digitized input, an FFT

of the collected data, the primitive wave of the sample set

or an IFFT of modified frequency domain data is plotted to

a display window to facilitate analyzing distortion products

and sources. Figure 1 shows a picture of the DC890B. The

DC890B is connected to the ADC demonstration circuit via

a 100-pin edge connector, to the PC by a USB A-B cable and

to an optional power supply either by a 5mm power plug

or optionally by turrets. Figure 2 details the connections.

Design files for this circuit board are available at

http://www.linear.com/demo

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DEMO MANUAL DC890B

QUICK START PROCEDURE

To prevent damage to the DC890B, it is important to follow

the equipment setup procedure outlined below:

1. Do not plug the DC890B into the PC USB port before

running the installation program

2. Download the PScope installation program from

http://www.linear.com/software/.

3. Run the PScope installation program and follow the

on-screen instructions.

NOTE: The PScope evaluation software requires a PC

running Windows98, 2000, XP, or later, with an available

USB port.

4. Connect the DC890B to the USB port and supply ex-

ternal power to the DC890B, if you will be using the

LVDS mode. Do not use a USB cable longer than 2m or

the board may not reset properly. (See note in Trouble

Shooting section.)

5. Connect only 2.5V CMOS or LVDS output ADC demon-

stration circuits directly to the DC890B via the 100 pin

edge connector. All Linear Technology DC890 compat-

ible demo boards meet these requirements. Apply DC

power to the ADC demonstration circuit.

6. Each ADC demonstration board also comes with a quick

start guide similar to this one and should be referred to

for specific usage details relevant to the demonstration

circuit being evaluated. Please refer to it for proper

jumper settings, input power requirements and input

signal levels and frequency ranges.

7. Apply an appropriate conversion clock and analog input

signal to the ADC demonstration board.

8. ADC board will be automatically detected and config-

ured.

9. Select processing options (the hammer icon) menu

and verify that under trigger mode, no trigger wait is

selected

10. Enter the exact sample rate in MHz and select the sample

size in the provided fields in PScope page 1.

NOTE: Minimum sample rate in LVDS mode is 50Msps.

11. If the sampled signal is not coherent with the encode

clock, select an appropriate windowing function from

the pull down menu.

12. Initiate a data collection cycle by clicking the green

collect button; it will turn red during the collection

cycle. An FFT should appear on the screen along with

a plot of the sampled data. Make sure the input level is

not over ranging the ADC. See online help for specific

guidance on using the PScope software.

OPERATING PRINCIPLES

The DC890B is capable of collecting a block of data samples

from an ADC demonstration circuit initiated either by an

internally generated trigger or an externally supplied 2.5V

CMOS level trigger of user selected edge. The external

trigger is TTL or CMOS compatible (the trigger line is

diode clamped to the 2.5V Rail through a 475Ω resistor).

Refer to the PScope software help for information on the

various operating modes and options. The conversion

clock to the DC890B is supplied via the ADC demonstra-

tion circuit either from an optional on board oscillator if

installed or an external signal generator connected to the

ADC demonstration circuit.

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DEMO MANUAL DC890B

EXT TRIGGER INPUT

USB

CONNECTOR

EXT 6VDC

REQUIRED FOR

LVDS. APPLY TO

TURRET TP2 AND

TP3 OR USE A 5mm

POWER-PLUG

0R WALL

TRANSFORMER

JTAG

DEMONSTRATION

CIRCUIT

CONNECTOR

Figure 2. DC890B Basic Connection Locations

QUICK START PROCEDURE

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DEMO MANUAL DC890B

OPTIONAL CONNECTIONS TO THE DC890B

USEFUL SOFTWARE TOOLS

The PScope software includes tools for automatic software

updates and for quickly retrieving documentation from

the world wide web.

NOTE: Adobe Acrobat Reader is required to view the docu-

ments and is available at http://www.adobe.com.

To update the PScope software (requires an internet

connection):

• Choose Update Program from the tools menu.

This automatically updates the main program and drivers

for individual demo circuits.

• In CMOS mode the DC890B can operate from the USB

power, however in LVDS mode, the Spartan-III FPGA IO

ring drivers draw considerable supply current to bias

the active LVDS terminations. The DC890B has provi-

sions for a 5mm power plug for an external 6V ±0.5V

supply. The DC890B automatically detects the presence

of external power and disables the USB power input.

• X1: The DC890B has provisions for an external trigger

input, edge selectable by software. This permits initiat-

ing data block capture by an external event.

• J2: A JTAG connector is provided for downloading

custom FPGA software to the board. Grounding pin 3

of J2 automatically puts the FPGA into JTAG program-

ming mode. User developed code can be loaded into the

FPGA without compromising the factory installed code.

Jumper pins 4 and 6 of PIC programming connector

J1 to disable the microcontroller when using custom

FPGA code. Refer to the schematic for further details.

This feature is provided due to customer requests.

Development of custom code will not be supported

by the factory.

• J7 and J8 locations (not installed) provide access to

six additional FPGA pins for test purposes. These pins

also drive LED indicators useful for debug purposes.

Xilinx provides logic analysis and data collection features

through JTAG via ChipScope.

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DEMO MANUAL DC890B

The DC890B provides system status via eight LEDs:

LED-1. TRANSFER – Indicates a USB data transfer from

the PScope to the PC is in progress.

LED-2. SEEP – Indicates access of the optional demon-

stration circuit serial electrically erasable PROM on

select demonstration boards. Information in this

SEEP permits PScope software to configure the

DC890B properly for the device under evaluation

using the auto detect demo board feature in the

configure/device menu.

LED-3. RST – Indicates assertion of either a hard or soft

reset.

LED-4. DCM_RDY– In LVDS mode, LED 4 blinks to alert

the user that the sample clock is either not present

LED INDICATORS

or outside the required frequency range (FIN must

be > 50 MHz). A steady on condition indicates the

digital clock module is locked to the input sample

clock. In CMOS mode LED 4 functions as a power-

on/FPGA programmed Indicator.

LED-5. RUN ON TRIGGER – Indicates that the board is

set to run on trigger (versus halt on trigger mode).

LED-6. DATA_RDY – Indicates completion of data block

acquisition.

LED-7. RUN – Indicates the board is ARMED to collect a

block of data.

LED-8. TRIGGER – Indicates that a trigger was received

and data collection has started.

A schematic, parts list and parts placement drawings are

attached to the end of this quick start guide for reference

only.

CIRCUIT DETAILS

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DEMO MANUAL DC890B

Problem: DC890B is plugged in, but PScope software still

does not recognize DC890B board.

Solution: Assuming that the USB hardware in your com-

puter is operational (try verifying an operational USB port

with another USB device such as a USB memory stick,

printer or scanner if available.), the likely cause is improper

installation of the USB drivers, which results in Windows

recognizing the DC890B as an unknown device. If this is

the case, the problem can be corrected by the following

procedure:

1) Unplug the DC890B board from the USB port.

2) Reinstall the PScope software. Carefully following the

on-screen instructions. This may require a reboot of

your computer. The on-screen instructions will inform

you if that is the case.

3) If the problem persists, please choose contact software

support from the tools menu for assistance from LTC

staff.

Problem: Demonstration circuit software loads properly,

but will not run or gives device not accessible errors.

Solution: Verify the demonstration circuit is properly

powered up and a correct (signal level and frequency)

conversion clock is applied. (The DC890B can operate

from the USB port power in CMOS mode but will not

load the FPGA with the LVDS code unless external power

is detected.) Set the correct sample rate for the applied

conversion clock as PScope software uses the sample

size and rate to determine the watch dog time out period

TROUBLE SHOOTING GUIDE

to reset the DC890B if the USB bus should hang. Refer

to the appropriate demonstration circuit quick start guide

for details.

Problem: Collected data samples look like noise or appear

corrupted.

Solution: Make sure the proper device has been selected

in the PScope software, the factory jumper settings are

present and for LVDS output demo boards, external power

is applied to the DC890B otherwise the captured data will

not be properly interpreted.

Problem: PScope reports it cannot reset the DC890B.

Solution: Make sure either a powered USB port is used

or external power is supplied. DO NOT USE A USB CABLE

LONGER THAN 2 METERS. The time delay of a longer USB

cable may result in the DC890B intercepting the reset.

Problem: USB Bus appears to be hung.

Solution: As the DC890B is used in a lab environment

where power may be inappropriately sequenced, cables

unintentionally disconnected etc, some users have re-

portedly had their USB bus hang. This condition is easily

rectified by right clicking properties under my computer

⇒ Hardware ⇒ Device Manager ⇒ and then right clicking

on the appropriate USB bus controller and again selecting

properties. The device status generally reports that it is

working properly. Select the advanced tab. You will notice

a refresh button. Device manager has queried the port,

and as a result, reset the bus.

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DEMO MANUAL DC890B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 3 C80, C81, C89 CAP, TANT, 470μF, 10V 20% 7343 AVX TPSE477M010R0050

2 0 C94 (OPTION) CAP, TANT, 470μF, 10V 20% 7343 AVX TPSE477M010R0050

3 0 C88 (OPTION) CAP, POLY-TA, 1000μF 4V 20% 7343 KEMET T530X108M004ASE006

4 1 C88 CAP, POLY-TA, 680μF 4V 20% 7343 KEMET T520D687M004ASE025

5 1 C36 CAP, 330μF 16V 20PCT NICHICON UPH1C331MPD6

6 9 C1 ,C2, C32, C35, C38, C76, C78,

C79, C92

CAP, X5R 10μF 6.3V 20% 1206 TAIYO YUDEN JMK316BJ106ML-T

7 1 C82 CAP, TANT, 4.7μF, 10V 20% 3216 AVX TAJA475M010R

8 5 C8, C37, C60, C77, C91 CAP, X5R 1μF 10V 10% 0603 AVX 0603ZD105KAT

9 1 C83 CAP, X5R 0.22μF 16V 20% 0603 AVX 0603YD224MAT

10 15 C11, C12, C27 TO C31, C34, C42,

C44, C52, C53, C57, C62, C85

CAP, X7R 0.1μF 16V 10% 0603 AVX 0603YC104KAT

11 43 C13 TO C26, C39, C40, C45 TO C50,

C54 TO C56, C58, C59, C61,

C63 TO C75, C90, C93

CAP, X5R, 0.1μF, 10V 10% 0402 AVX 0402ZD104KAT

12 1 C43 CAP, X7R 0.047μF 16V 10% 0603 AVX 0603YC473KAT

13 5 C4, C5, C33, C84, C87 CAP, X7R 0.01μF 16V 10% 0603 AVX 0603YC103KAT

14 1 C10 CAP, X7R 2200pF 25V 10% 0603 AVX 06033C222KAT2A

15 0 C9 (OPTION) CAP, X7R 2200pF 25V 10% 0603 AVX 06033C222KAT2A

16 1 C41 CAP, X7R 1000pF 25V 10% 0603 AVX 06033C102KAT2A

17 0 C86 (OPTION) CAP, X7R 1000pF 25V 10% 0603 AVX 06033C102KAT2A

18 1 C51 CAP, NPO, 100pF 25V 10% 0603 AVX 06033A101KAT2A

19 3 C3, C6, C7 CAP, NPO 22pF 50V 10% 0603 AVX 06035A220KAT

20 9 D1 TO D8, D12 LED, GRN 0603 LITE ON LTST-C190KGKT

21 1 D10 DIODE, DUAL SCHOTTKY, SOT23 DIODES INC BAT54S-7

22 2 D11, D13 RECTIFIER, GP 1A 50V SMA DIODE INC S1A -13

23 2 D9, D14 DIODE, GP 200V 200MA SOD323 DIODES INC BAV20WS

24 1 J1 HEADER, 3 × 2, 2mm COMM CON 2202S-06G2

26 1 J2 HEADER, 2 × 7, 2mm MOLEX 87831-1420

27 0 J3, J11 (OPTION) HEADER, 2 × 1, 2mm COMM CON 3201S-02G2

28 1 J4 HEADER, 3 × 1, 100MIL SAMTEC TSW-103-26-L-S

29 1 J5 CON, EDGE, 100PIN, 0.063 SAMTEC MEC8-150-02-L-D-EM2

30 1 J6 CON, USB-B, 4 PINS, SINGLE THR HOLE MILL-MAX 897-30-004-90-000

ALTERNATE 897-43-004-90-000000

31 1 J9 CONNECTOR, POWER 5mm CUI INC PJ-002A-SMT

32 0 J10 (OPTION) HEADER, 3 × 1, 2mm COMM CON 3201S-03G2

33 0 L1 CHOKE, COMMON MODE, QUAD, 5μH COILCRAFT TTDLF4500

34 1 L1 ALTERNATE CHOKE, COMMON MODE, QUAD, 5μH COILCRAFT PDLF4500

35 1 L2 IND, PWR, 2.2UH, D52LC TOKO D52LC #A914BYW-2R2M

36 0 L3 (OPTION) IND, PWR, 2.2UH, D52LC TOKO D52LC #A914BYW-2R2M

37 5 Q1, Q6, Q8, Q9, Q12 XSTR, NPN, SOT23 DIODES INC MMBT3904-7

38 2 Q7, Q13 XSTR, PNP, SOT23 DIODES INC MMBT3906-7

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DEMO MANUAL DC890B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

39 4 Q2, Q3, Q4, Q5 XSTR, MOSFET, SOT23 VISHAY SI2316DS -T1

Q2, Q3, Q4, Q5 ALTERNATE XSTR, MOSFET, SOT23 VISHAY SI2306BDS-T1-E3

40 2 Q10, Q11 XSTR, MOSFET, SOT23 DIODES INC SEMI 2N7002-7

41 1 R102 RES, 2.2MΩ 5% 1/16W 0603 AAC CR16-225JM

42 1 R92 RES, 422k 1% 1/16W 0603 AAC CR16-4223FM

43 1 R95 RES, 324k 1% 1/16W 0603 AAC CR16-3243FM

44 1 R93 RES, 200k 1% 1/16W 0603 AAC CR16-2003FM

45 5 R6, R17, R67, R68, R79 RES, 100k 1% 1/16W 0603 AAC CR16-1003FM

46 1 R94 RES, 16.2k 1% 1/16W 0603 AAC CR16-1622FM

47 1 R3 RES, 14k 1% 1/16W 0603 AAC CR16-1402FM

48 14 R4, R10, R15, R16, R46, R66, R71,

R72, R73, R82, R84, R88, R91,

R105

RES, 10k 1% 1/16W 0603 AAC CR16-1002FM

49 10 R61, R81, R83, R90, R96,

R112 TO R115, R119

RES, 4.75k 1% 1/16W 0402 VISHAY CRCW04024751F

50 6 R21, R103, R104, R117, R118,

R137

RES, 4.75k 1% 1/16W 0603 AAC CR16-4751FM

51 0 R77 (OPTION) RES, 4.75k 1% 1/16W 0603 AAC CR16-4751FM

52 4 R14, R48, R85, R89 RES, 2k 1% 1/16W 0603 AAC CR16-2001FM

53 1 R11 RES, 1.5k 1% 1/16W 0603 AAC CR16-1501FM

54 9 R8, R18, R40, R41, R44, R45, R78,

R80, R106

RES, 1k 1% 1/16W 0603 AAC CR16-1001FM

55 0 R75, R107, R108 (OPTION) RES, 1k 1% 1/16W 0603 AAC CR16-1001FM

56 12 R9, R25 TO 32, R43, R110, R111 RES, 475Ω 1% 1/16W 0603 AAC CR16-4750FM

57 2 R47, R53 RES, 332Ω 1% 1/16W 0603 VISHAY CRCW06033320F

58 3 R74, R76, R138 RES, 332Ω 1% 1/16W 0402 AAC CR05-3320FM

59 5 R1, R2, R19, R38, R52 RES, 100Ω 1% 1/16W 0603 AAC CR16-1000FM

60 0 R120 TO R136 (OPTION) RES, 100Ω 1% 1/20W 0201 VISHAY CRCW0201-101J200RT7

61 17 R7, R20, R24, R54, R55 TO 60,

R62 TO 65, R69, R70, R116

RES, 49.9Ω 1% 1/16 0402 AAC CR05-49R9FM

62 3 R34, R86, R87 RES, 33.2Ω 1% 1/16W 0603 AAC CR16-33R2FM

63 2 R12, R13 RES, 22.1Ω 1% 1/16W 0603 AAC CR16-22R1FM

64 4 R22, R23, R39, R51 RES, 10Ω 5% 1/16W 0603 AAC CR16-100JM

65 5 R97 TO R101 RES, 10Ω 1% 1/8W 1206 AAC CR18-10R0FM

66 1 R42 RES, 0Ω JUMPER 0402 VISHAY CRCW04020000ZSTDE

67 0 R50 (OPTION) RES, 0Ω JUMPER 0402 VISHAY CRCW04020000ZSTDE

68 1 R109 RES, 0Ω JUMPER 0805 AAC CJ10-000M

69 1 R49 RES, 0.1Ω 1% 1/8W 0805 VISHAY WSL0805R1000FEA

70 3 R5, R33, R37 RES, 49.9k 1% 1/16W 0603 AAC CR16-4992FM

71 2 R35, R36 RES 2×4 ARRAY, CHIP, 100Ω, ISO ROHM MNR14E0ABJ101

72 1 SW1 SWITCH, LIGHT TOUCH, 2 PINS PANASONIC EVQPPDA25

73 5 TP2 TO TP3, G2, G3, G5 TURRET MILL MAX 2308-2

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DEMO MANUAL DC890B

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

74 0 TP1, G4, G6 (OPTION)

75 1 U17 IC, 93LC46BT-I/OT, SOT23-6 MICROCHIP 93LC46BT-I/OT

76 1 U7 IC, FT245BM, LQFP32 (2rs., PbF) FUTURE TECH (FTDICHIP) FT245BM

77 1 U10 IDT71T75602S200PF IDT71T75602S200PF

78 0 U10 (OPTION) 71V2556S200PF 71V2556S200PF

79 1 U19 IC, LT1529CQ-5 LINEAR TECHNOLOGY LT1529CQ-5

80 1 U4 IC, LT1763CS8 LINEAR TECHNOLOGY LT1763CS8

81 1 U8 IC, LT1763CS8-3.3 LINEAR TECHNOLOGY LT1763CS8-3.3

82 1 U5 IC, LTC1726EMS8-2.5 LINEAR TECHNOLOGY LTC1726EMS8-2.5

83 2 U3, U14 IC, LTC1844ES5-3.3 LINEAR TECHNOLOGY LTC1844ES5-3.3

84 1 U21 IC, LDO,1.5A, DD-5(Q PKG) LINEAR TECHNOLOGY LT1963EQ-2.5

85 1 U1 IC, LTC2921CGN-3.3 LINEAR TECHNOLOGY LTC2921CGN-3.3

86 1 U16 IC, LTC4210-1CS6 LINEAR TECHNOLOGY LTC4210-1CS6

87 1 U15 IC, LTC4300A-1CMS8 LINEAR TECHNOLOGY LTC4300A-1CMS8

88 1 U12 IC, LTC4410ES6 LINEAR TECHNOLOGY LTC4410ES6

89 1 U2 IC, OSC, SOT23-5 LINEAR TECHNOLOGY LTC6905CS5-96

90 1 U11 IC, NC7SP17P5X FAIRCHILD, NC7SP17P5X

91 1 U18 IC, FF, DUAL, HC, TSSOP14 PHILIPS, 74HC74PW

92 1 U6 IC, PIC16LF877A-I/PT MICROCHIP, PIC16LF877A-I/PT

93 1 U9 IC, XC3S200-4PQ208 XILINX, XC3S200-4PQ208C

94 1 U13 IC, SEEPROM, 4M, SO8 ST MICRO, M25P40-VMN6TP

95 1 U20 IC, SWREG, SYNC, BUCK LINEAR LTC3411EMS

96 1 X1 CONN, BNC 50Ω CONNEX 112404

97 1 Y1 CRYSTAL, 10MHz, HC49-SMT ECS INC. ECS-100-18-5P

98 4 STAND OFF, 1/4 × 4 TO 40 MICRO PLASTICS 14HTSP101

99 4 SCREW, 4 TO 40 - 1/4" SCREW 4-40X1/4PAN PH SS PS

100 0 HEATSINK, BGA (FOR U9) AAVID/THERMALLOY 374324B00035

PARTS LIST

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DEMO MANUAL DC890B

SCHEMATIC DIAGRAM

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DEMO MANUAL DC890B

SCHEMATIC DIAGRAM

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DEMO MANUAL DC890B

SCHEMATIC DIAGRAM

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DEMO MANUAL DC890B

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.

SCHEMATIC DIAGRAM

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DEMO MANUAL DC890B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

LT 0612 • PRINTED IN USA

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