Linear Technology DC1880A Quick setup guide

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dc1880af
DEMO MANUAL DC1880A
Description
LTC2874
Quad IO-Link Master
Hot Swap Controller and PHY
Demonstration circuit 1880A showcases the LTC
®
2874, a
quad Hot Swap™ controller and PHY suitable for IO-Link
®
master and other applications. DC1880A operates from
an external supply VDD and utilizes the DC590 USB serial
controller board to communicate with the LTC2874 using
SPI protocol.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap, QuikEval and Linduino are trademarks of Linear Technology Corporation. IO-Link is
a registered trademark of PROFIBUS User Organization (PNO). All other trademarks are the
property of their respective owners.
performance summary
Design files for this circuit board are available at
http://www.linear.com/demo/DC1880A
Specifications are at TA= 25°C, VDD = 24V, and VL= 3.3V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VDD Input Supply Range 24VMODE = 0
24VMODE = 1 8 20 30 30 V V
ΔVACL L+ Analog Current Limit Voltage ΔVACL = VSENSE+– VSENSE–
VL+ = 0V, FLDBK_MODE = 1
VL+ = VDD – 1V
Start-Up, 2XPTC Enabled, VL+ > 18V
9.2
42
16.7
50
100
24.2
58
mV
mV
mV
ΔVGATE External N-Channel Gate Drive
(VGATE – VL+)IGATE = –1µA
VDD = 17V to 30V
VDD = 8V
10
4.5
13 15
15
V
V
V
VRQH,
VRQL
CQ Residual Voltage Output High, ICQ = –100mA
Output Low, ICQ = 100mA 1.2
1.1 1.6 1.5 V V
IQPKH,
IQPKL
Wake-Up Request (WURQ) Current ±500 ±700 mA
IQH, IQL CQ Current Limit ±110 ±160 ±230 mA
fDTR Maximum Data Transfer Rate fDTR = 4nF
SLEW = 0
SLEW = 1
38.4
230.4
kb/s
kb/s
tWU WURQ Pulse Duration 75 80 85 µs
SCK Frequency 50% Duty Cycle 20 MHz

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DEMO MANUAL DC1880A
Quick start proceDure
Figure 1. Proper Setup

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DEMO MANUAL DC1880A
Quick start proceDure
DC1880A is a 6-layer demonstration board. An LDO is
included to optionally derive the VLlogic supply from
the VDD input supply. An LED lights up when the IRQ pin
signals interrupt requests.
1. Install, or update as needed, Linear Technology's
QuikEval™ evaluation software on the PC. See Using
the LTC2874 Software section for more information.
2. Connect the DC590 board to the PC with a standard
USB A/B cable.
3. Connect the DC1880A board to the DC590 board using
the14-conductorribboncablesuppliedwiththeDC590
board.
4. ChoosethesourcefortheVLlogicsupply—theDC590,
the LDO on the DC1880A, or either if both are set to
the same voltage:
a. SettheDC1880ALDOjumpers(JP11andJP12)and
DC590 VCCIO jumper (JP6) to one of the combina-
tions listed in Table 1. Default jumper positions set
both boards to 5V.
b. When using a Linduino™ One instead of a DC590
board, set the DC1880A LDO to 5V(JP11 = 5.0V)
or disable it (JP12 = OPEN).
5. Before connecting the input power supply to the
DC1880A board, verify the voltage is below 40V
(normally between 8V and 30V) and that the supply
is turned off.
6. Connect the power supply between VDD and GND on
the DC1880A board as shown in Figure 1.
7. Connect line interface cables (up to 20m long) to either
the screw-terminal blocks (J1-J4) or the IO-Link con-
nectors (J5-J8).
8. Turn on the 24V power supply and verify that the IRQ
LED on the DC1880A board is lit. (The LTC2874 is
signalling that one or more of its supplies had been
low.)
9. Launch the GUI software. Refer to the Using the
LTC2874 Software section for more information on
how to control the LTC2874 using the GUI.
10.Clear the IRQ condition by clearing any Supply Event
bits that are set. On the Events tab, simply click on any
lamps that are lit.
11.Refer to the Additional Information section and the
data sheet for operating details.

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DEMO MANUAL DC1880A
aDDitional information
VL Logic Supply
Table 1 lists several ways to supply power to the VL pin.
Methods 1a/b/c are recommended for most purposes.
Table 1. Recommended Options for Powering the VL Supply
METHOD
DC590
JP6
DC1880A
JP12
DC1880A
JP11
SOURCE FOR
VL POWER
1a
1b
1c
5V*
3.3V
OPEN (2.7V)
ON*
ON*
ON*
5V*
3.3V
OPEN (2.9V)
LDO or DC590
LDO or DC590
LDO or DC590
2 EXT ON* X** LDO
3 EXT OPEN X** DC1880A VL TURRET
4 5V* or 3.3V OPEN X** DC590
* (Default)
** Including OPEN (2.9V)
L+ Power Supply Outputs
Enable the L+ power supply outputs by setting their
respective EN_L+ register bits high.
CQ Line Driver Outputs
Enable the CQ line drivers either by input pin (using the
TXEN turrets and/or jumpers JP1/3/7/9) or via the SPI
interface(bysettingDRVENregisterbitshigh).SeeTable2.
Table 2. CQ Driver Mode Configuration
JP1/3/7/9
SETTING
TXEN
TURRET
DRVEN
BIT
CQ DRIVER
MODE
GND
VL
X
EXT
X
X
X
L/H
0
X
1
0
OFF
ON
ON
OFF/ON
Control the output CQ states using the TXD turrets and/
or jumpers JP2/4/8/10. See Table 3.
Table 3. CQ Driver Output Level Configuration
JP2/4/8/10
SETTING
TXD
TURRET
DRVEN
BIT
CQ DRIVER
MODE*
CQ
LEVEL
GND
GND/VL
EXT
DB9
X
X
L/H
X
X
X
X
H/L**
OFF
ON
ON
ON
L
H/L
H/L
H/L
* From Table 2
** RS232 transceiver U2 inverts
Alternatively, operate the CQ drivers solely via the SPI
interface by tying TXD low and controlling the DRVEN
register bits. This method is suitable for SIO mode and
switching at or below COM2 data rates (38.4kb/s).
TVS Protection
The CQ and L+ pins are protected by 36V TVS diodes for
cable-driving applications.
Serial Port
A DB9 connector enables CQ data to be sent (for one or
more ports) and received (for one port) using PC software
such as a serial terminal program. Jumper JP5 enables
the required RS-232 transceiver.
Select the desired combination of drivers by setting one
or more of JP2/4/8/10 to the DB9 position. Select one CQ
receiver using JP6.
L+ Isolation
If L+ isolation is not needed, Schottky diodes D1-D4 may
be replaced with 0Ω resistors.
Interrupts
The LTC2874 includes an open-drain interrupt line for
signaling the host controller when it needs service. This
signal is accessible on the DC1880A board at the IRQ test
point. An LED is also included for convenience.

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DEMO MANUAL DC1880A
aDDitional information
Jumpers
JP1/3/7/9: Port 4/3/2/1 CQ Driver Enables. See Table 2.
Default position VL.
JP2/4/8/10: Port 4/3/2/1 Data Input to CQ Driver. See
Table 3. Default position GND.
JP6: RXDn COM Port Select. Determines which receiver
output (RXD1/2/3/4, if any) is connected to the serial port.
Default position RXD1.
JP5: COM PORT Enable. Connects RS232 transceiver U2
to VL logic supply. Default position ON.
JP11: VL Select. Programs LDO voltage to 2.9V(OPEN),
3.3V, 5V, or 5.5V. Default position 5V.
JP12: LDO On. Enables LDO which derives VL logic sup-
ply from VDD supply voltage input. Default position ON.
JP13: GND Shield. Shorts shields of J5-8 to GND. Default
position OPEN.

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DEMO MANUAL DC1880A
using the Dc1880a software
Introduction
Linear Technology’s QuikEval software provides a quick
and easy way to evaluate most aspects of LTC2874 opera-
tion. It operates a SPI interface that reads or writes from
the 14 onboard registers via a DC590 serial controller.
Install QuikEval BEFORE connecting the DC1880A to the
USB port of the PC. Download and run the installation
program from http://www.linear.com/software and follow
the onscreen instructions. The LTC2874 GUI will launch
automatically when the PC begins communicating with
the DC1880A via the serial controller. Thereafter, start
the GUI by running QuikEval from:
C:\Program Files\LTC\QuikEval\quikeval.exe
If the QuikEval software was installed previously, update
it to the latest version using Tools > Update Program.
The LTC2874 GUI is composed of a main window having
three tabs, and a Register Map window. The Ports tab
(Figure2)containscontrolsandmonitorsthatareuniqueto
eachindividual port.The Timersand Globalstab (Figure3)
contains controls and monitors that are common to all
ports. The Events tab (Figure 4) provides access to event
monitoringregisters. The Register Map window(Figure 5)
provides access to all register bits via an alternate format.
TheLTC2874GUIbeginscommunicatingwiththeDC1880A
automatically. Once running, it continuously polls the
LTC2874 registers to monitor status.
Connect/Disconnect Button
TheDisconnectbuttondisablestheSPIinterface and most
of the GUI. The Connect button restarts SPI polling and
activates the complete GUI.
Reset Button
This button issues a SPI Reset command, returning all
registers to default values.
Events Tab
This tab contains lamps that map to Event Register bits.
A lamp that is on indicates that the corresponding bit in
the LTC2874 Event Register has been set. Clicking on a
lamp will clear the Event bit if the condition no longer
persists. Event Register behavior is sticky, meaning each
lamp stays on until cleared.
The check boxes control which events will cause IRQ to
signal.
Register Map
Thiswindowpresentsallregisterbitsinanalternateformat.
Change register values directly by clicking on individual
bits, using arrow widgets, or by entering numeric values.
Changed bits appear yellow until either committed to the
LTC2874 by pressing the Write and Update button, or
clearedbypressingtheDiscardUnwrittenChangesbutton.
TheSaveCurrentValuesbuttonsavestheLTC2874register
values to a text file. The Load Saved Values button loads
theregister values from onesuchfileintotheRegisterMap
window. (Write and Update will then configure LTC2874
accordingly.)
Running QuikEval GUI Using Linduino One
The QuikEval GUI software for DC1880A may be operated
using a Linduino One (DC2026) with the DC590 emulator
sketchinplaceoftheDC590.WhenusingthisUSB-isolated
Arduino-compatibledemonstrationboard,settheDC1880A
LDO to 5V (JP11=5.0V) or disable it (JP12=OPEN).

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DEMO MANUAL DC1880A
using the Dc1880a software
Figure 2. Main Window, Ports Tab

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DEMO MANUAL DC1880A
using the Dc1880a software
Figure 3. Main Window, Timers and Globals Tab

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DEMO MANUAL DC1880A
using the Dc1880a software
Figure 4. Main Window, Events Tab
Figure 5. Register Map Window

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DEMO MANUAL DC1880A
troubleshooting guiDe
1. Problem: LTC2874 program doesn't download and
install automatically.
Solution: Get the latest QuikEval software either by
updating QuikEval from its pull-down menu (Tools >
Update Program), or by installing the latest version
directly from: www.linear.com/software.
2. Problem: DC590 controller board not detected.
(Error 1)
Solution: Connect to PC using USB A/B cable.
3. Problem: LTC2874 not detected. (Error 2)
Solution: Ensure that the DC590 ribbon cable is con-
nected and that VL power is applied. See Table 1.
4. Problem: Unsuccessful communication with the
LTC2874. (Error 5)
Solution: Check DC590 ribbon and USB connections.
Usually, this error indicates that one was disconnected
while the program was running.
5. Problem: Invalid value read from the LTC2874.
(Error 6)
Solution: Ensure VL supply power is applied correctly.
ReferringtoTable1,checkLDOjumperontheDC1880A
and JP6 on the DC590.
6. Problem: GUI is gray-colored and inactive.
Solution: Press Connect button.

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DEMO MANUAL DC1880A
parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C1 CAP, 1µF 20%, 16V, X7R, 0603 TDK, C1608X7R1C105M
2 1 C2 CAP, 1µF 10%, 50V, X7R, 0805 MURATA, GRM21BR71H105KA12L
3 1 C9 CAP, ALUMINUM, 100µF, 20%, 63V UCC, EMZA630ADA101MJA0G
4 8 D5-12* DIODE, TVS, 36V, SMA STM, SM6T36A
5 4 Q1-4 TRANSISTOR, NFET, SOT-223 FAIRCHILD, FQT7N10TF
6 4 R1-4 RES, 10Ω,1%, 0603 AAC, CR16-10R0FM
7 4 R25-28 RES, 0.2Ω, 1%, 0805 SUSUMO, RL1220S-R20-F
8 1 U1 IC, QUAD IO-LINK MASTER HOT SWAP CONTROLLER
AND PHY LINEAR TECH, LTC2874IFE
Additional Demo Board Circuit Components
1 3 C3,C4,C6 CAP, 1µF, 20%, 16V X7R, 0603 TDK, C1608X7R1C105M
2 1 C5 CAP, 0.22µF, 10%, 16V X7R, 0603 TDK, C1608X7R1C224K
3 1 C7 CAP, 0.1µF, 10%, 25V X7R, 0603 TDK, C1608X7R1E104K
4 1 C8 CAP, TANTALUM, 4.7µF, 20%, 7343 50V AVX, TAJD475K050R
5 0 C10-21 OPTIONAL
6 4 D1-4** DIODE, SCHOTTKY, 1A, 100V FAIRCHILD, S100
7 1 D13 LED, RED PANASONIC, LN1251C
8 1 L1 INDUCTOR, 10µH, 0.5Ω, 0.3A, 0806 TAIYO-YUDEN, CBC2016T100M
9 9 R5-12, R24 RES, 100, 5%, 1206 AAC, CR18-101JM
10 1 R22 RES, 4.99k, 1%, 0603 AAC, CR16-4991FM
11 3 R13-15 RES, 4.99k, 1%, 0603 AAC, CR16-4991FM
12 1 R16 RES, 100k, 1%, 0603 AAC, CR16-1003FM
13 1 R17 RES, 75k, 1%, 0603 VISHAY, CRCW060375K0FKEA
14 1 R18 RES, 10k, 1%, 0603 AAC, CR16-1002FM
15 1 R19 RES, 309k, 1%, 0603 VISHAY, CRCW0603309KFKEA
16 1 R20 RES, 59k, 1%, 0603 AAC, CR16-5902FM
17 1 R21 RES, 47.5k, 1%, 0603 AAC, CR16-4752FM
18 1 R23 RES, 680, 1%, 0603 AAC, CR16-681FM
19 0 R29-32 OPTIONAL
20 1 U2 IC, RS232 TRANSCEIVER LINEAR TECH, LTC2802CDE
21 1 U3 IC, LDO LINEAR TECH, LT3012EFE
22 1 U4 IC, SERIAL EEPROM 2k MICROCHIP, 24LC025-I/ST
Hardware for Demo Board Only
1 12 E1-6, E8-13 TURRET MILL-MAX, 2308-2-00-80-00-00-07-0
2 6 E7, E14-18 TURRET MILL-MAX, 2501-2-00-80-00-00-07-0
3 4 J1-4 TERMINAL BLOCK, 5 POSITION, 3.5mm, HEADER WÜRTH, 691321100005
4 4 J1-4 TERMINAL BLOCK, 5 POSITION, 3.5mm, PLUG WÜRTH, 691361100005
5 1 J5 JACK, M12, 5 POSITION, FEMALE, STRAIGHT BINDER, 09-3442-500-05
6 0 J6-8 OPTIONAL
7 1 J9 CONNECTOR, DSUB, 9 PIN FEMALE SIGNATRON, DR-E9SB-NJ-001
* TVS diodes are recommended for cable-driving applications.
** Substitute 0Ω resistors if diodes not desired.

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DEMO MANUAL DC1880A
parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
8 2 J10-11 JACK, BANANA KEYSTONE, 575-4
9 1 J12 HEADER, 2×7 2mm MOLEX, 87831-1420
10 5 JP1, JP3, JP7, JP9, JP11 HEADER, 2×3 2mm SAMTEC, TMM-103-02-L-D
11 5 JP2, JP4, JP6, JP8, JP10 HEADER, 2×4 2mm SAMTEC, TMM-104-02-L-D
12 2 JP5, JP12 HEADER, 1×2 2mm SAMTEC, TMM-102-02-L-S
13 12 JP1-12 SHUNT, 2mm SAMTEC, 2SN-BK-G
14 1 JP13 HEADER, 1×2 0.1" SAMTEC, TSW-101-07-G-D
15 1 JP13 SHUNT, 0.1" SAMTEC, SNT-100-BK-G
16 4 STANDOFF, SNAP-ON KEYSTONE, 8833

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DEMO MANUAL DC1880A
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
NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
TXEN4 1
GATE4 2
SENSE-4 3
CQ4 5
L+4 4
GATE3 7
CQ3 6
SENSE-3 8
L+3 9
SENSE+ 10
VDD 11
GATE2 12
SENSE-2 13
L+2 14
CQ2 15 CQ1 16
GATE1 17
SENSE-1 18
L+1 19
RXD1
20 TXD1 21 TXEN1 22 IRQ
23 SDO
24 RXD2 25 TXD2 26 TXEN2 27 VL 28 GND 29 GND 30 SDI 31 SCK 32 CS
33 RXD3
34 TXD3 35 TXEN3 36 RXD4 37 TXD4 38
U1 LTC2874IFE
A B C DE FG H A BC DE F G H
4 5 6 7 8 9
10
4 5 6 7 8 9
I J KL I J KL
1 2 3
1 2 3
TITLE: SCHEMATIC SIZE IC NO. REV.
DATE: SHEET OF
APPROVALS
SCALE = NONE
CUSTOMER NOTICE
Monday, October 28, 2013
2
QUAD INDUSTRIAL BUS MASTER CONTROLLER
KEITH B.
11
LTC2874IFE
DEMO CIRCUIT 1880A
ECO REV APPROVED DATE
REVISION HISTORY
DESCRIPTION
1630 McCarthy Blvd. Milpitas, CA 95035 Phone: [phone] Fax: [phone] www.linear.com
LTC CONFIDENTIAL
FOR CUSTOMER
USE ONLY
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER - SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMERS RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
PCB DES. APP ENG. KEITH B.
-2 1ST PROTOTYPE KEITH B. 9-17-12
N/A
J10
VDD
8V - 30V
LINE OUT
Q2 FQT7N10
R27 0.2 0805
R2 10
Q1 FQT7N10
R25 0.2 0805
R1 10
Q4 FQT7N10
R26 0.2 0805
R4 10
Q3 FQT7N10
R28 0.2 0805
R3 10
J11
GND
2 4 6 8 10 12 1413
11
9 7 5 3 1
J12
DC590
IRQ
IRQ
SDO
SDO
SDI
SDI
CS
SCK
SCK
CS
E14
VL
2.9V - 5.5V
E15
GND
E16
VDD
R7
100
1206
VL EXT GND
E4
TXEN3
R12 100 1206
VL
EXT
GND
JP10 TXD1
DB9
R5
100
1206
VL EXT GND
E1
TXEN4
R9
100
1206
VL EXT GND
E8
TXEN2
R11
100
1206
VL EXT GND
E11
TXEN1
E12
TXD1
R10 100 1206
VL
EXT
GND
JP8 TXD2
DB9
E9
TXD2
R8 100 1206
VL
EXT
GND
JP4 TXD3
DB9
E5
TXD3
R6 100 1206
VL
EXT
GND
JP2 TXD4
DB9
E2
TXD4
R23 680
D13 IRQ RED
R22 4.99k
JP9 TXEN1
JP7 TXEN2
JP3 TXEN3
JP1 TXEN4
DCD
DSR
RX
TX
GND
1 6 2 7 3 8 4 9 5
J9
RTS CTS
DTR
TXn
JP6
TXn
R24 100 1206
E13
RXD1
E10
RXD2
E6
RXD3
E3
RXD4
C2
1uF/50V
0805
C3 1uF/16V C4
1uF/16V
C6 1uF/16V
L1 10uH
C5
220nF/16V
RIN
1TOUT 2
VCC 3
VDD
4
SW
5
GND 6
CAP
7
VL 10
MODE 9
PS 8
TIN 11
ROUT 12
VEE
13
U2 LTC2802
C8
4.7uF/16V
3528
C9
100uF/63V
DIA=12.5mm
LINE IN
D6 36V D8 36V D10 36V D12 36V
SCL 6
SDA 5
WP 7
A0
1A1
2A2
3
VCC 8
VSS
4
U4 24LC025
R15 4.99k R14 4.99k R13 4.99k
C7
0.1uF/25V
VL
VL
VL
E7
GND
VL VL VL
VL VL VL VL TXn TXn TXn
VL
RXD4
RXD3
RXD2
RXD1
SDO SDI SCK
CS
1 2 3 4 5
J1
1 2 3 4 5
J2
1 2 3 4 5
J3
1 2 3 4 5
J4
L+1 I/Q1 L-1 C/Q1 NC1 L+2 I/Q2 L-2 C/Q2 NC2 L+3 I/Q3 L-3 C/Q3 NC3 L+4 I/Q4 L-4 C/Q4 NC4
1 5 3 2 4
J8
1 5 3 2 4
J7
1 5 3 2 4
J6
1 5 3 2 4
J5
E18
GND
E17
GND
C18 OPEN C19 OPEN C20 OPEN C21 OPEN
C10 OPEN
C11 OPEN
C12 OPEN
C13 OPEN
C14 OPEN
C15 OPEN
C16 OPEN
C17 OPEN
R29 OPEN R30 OPEN R31 OPEN R32 OPEN
I/Q1
L+1
NC1
C/Q1
L-1
JP13
GND - SHIELD
I/Q2
L+2
NC2
C/Q2
L-2
I/Q3
L+3
NC3
C/Q3
L-3
I/Q4
L+4
NC4
C/Q4
L-4
RXDn SELECT COM PORT
COM PORT
(DB9)
JP5
COM PORT
ENABLE
C1
1uF/16V
IN 13
SHDN 11
OUT
4
ADJ
5
GND
6
U3 LT3012
JP12
LDO
ON
R18 10k
R16
100k
R17 75k
JP11
VL
SELECT
R20 59k R21 47.5k R19 309k
2.9V 3.3V 5.0V 5.5V
D5 36V D7 36V D9 36V D11 36V
D1 S100 D2 S100 D3 S100 D4 S100
IRQ

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dc1880af
DEMO MANUAL DC1880A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
LT 1213 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LT C) provides the enclosed product(s) under the following AS IS conditions:
Thisdemonstration board (DEMOBOARD) kit being sold or provided by LinearTechnologyisintended for usefor 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. LT C 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.
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Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation

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