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DEMO MANUAL DC2248A
Description
LTC6951
Ultralow Jitter Multi-Output Clock
Synthesizer with Integrated VCO
Demonstration circuit 2248A features the LT C
®
6951,
an Ultralow Jitter Multi-Output Clock Synthesizer with
Integrated VCO.
For ease of use, the DC2248A is powered from a single
6V supply and comes installed with a 100MHz reference.
Direct access to the LTC6951 5V, 3.3V and the reference
supplies is possible by removing jumpers. For evalua-
tion of the LTC6951 with other references, the DC2248A
can be modified to accommodate different onboard or
external components.
All differential inputs and outputs have 0.5" spaced SMA
connectors. The DC2248A has four AC coupled CML out-
puts with 50Ω transmission lines making them suitable
to drive 50Ω impedance instruments. The LVDS output
is DC coupled.
The LTC6951’s synchronization functions are made avail-
able via the LTC6951 SPI interface, an SMA connector and
a turret. The DC2248A can be modified to use an onboard
switch and debounce circuit to control the sync pin.
A DC2026 (or DC590B) USB serial controller board is used
for SPI communication with the LTC6951, controlled by
the supplied LTC6951Wizard
™
software.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2248A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LT6951Wizard, EZSync ParallelSync and QuikEval are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Figure 1. DC2248A Connections
OUT3, CML
AC-COUPLED
OUTPUTS, SMA
OUT0, CML
AC-COUPLED
OUTPUTS, SMA
OUT1, CML
AC-COUPLED
OUTPUTS, SMA
OUT2, CML
AC-COUPLED
OUTPUTS, SMA
SYNC INPUT,
SMA AND TURRET,
DEFAULT OPTION
RIBBON CABLE
CONNECTION
TO DC590
SUPPLY OPTION,
JUMPERS,
REFER TO DC2248
RECONFIGURATION
SINGLE SUPPLY
6V – 9V INPUT,
BANANA JACKS,
DEFAULT OPTION
FREQUENCY REFERENCE OPTION,
SMA AND TURRET,
REFER TO DC2248 RECONFIGURATION
SYNC OPTION, ONBOARD
SWITCH AND DEBOUNCE CIRCUIT
REFER TO DC2248 RECONFIGURATION
OUT4, LVDS
DC-COUPLED
OUTPUTS, SMA
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DEMO MANUAL DC2248A
Quick start proceDure
The DC2248A is easy to set up to evaluate the performance
of the LTC6951. Follow the procedure below.
The LTC6951Wizard and the DC2026 (or DC590B) are
required to control the DC2248A through a personal
computer (PC).
DC2026 and DC590B Configuration
DC2026: Refer to Figure 2. Set the JP3 jumper to the 3.3V
(preferred) or 5V position.
DC590B: Refer to Figure 2. Set the JP6 jumper to the 3.3V
(preferred) or 5V position. JP4 should select “EN”, JP5
“ISO” and “SW” should both select “ON.”
Connect either the DC2026 (or DC590B) to one of your
computer’s USB ports with the included USB cable.
The DC2026 has the ability to run Linduino code. Refer to
http://www.linear.com/solutions/linduino and the Frequently
Asked Question section (Question #3) for more details.
LTC6951Wizard Installation
The LTC6951Wizard software is used to communicate with
the LTC6951. It uses the DC2026 (or DC590B) to translate
between USB and SPI-compatible serial communications
formats. It also includes advanced PLL design and simu-
lation capabilities. The following are the LTC6951Wizard
system requirements:
• Windows Operating System: Windows XP, Windows
2003 Server, Windows Vista, Windows 7
• Microsoft .NET 3.5 SP1 or later
• Windows Installer 3.1 or later
• Linear Technology’s
®
DC590B or DC2026 (with the
DC590B emulator sketch loaded)
The DC2026 arrives from the factory with the DC590B
emulator sketch loaded. If this is not the case refer to the
Troubleshooting section.
Figure 2. DC2026B and DC590B Jumper and Connector Location
JP3 (DC2026), JP6 (DC590B)
SELECT 3.3V OPTION
JP5
JUMPER
JP4
JUMPER
J1 (DC2026), J4 (DC590B)
RIBBON CABLE CONNECTION TO PC
J3, USB
CONNECTION
TO PC
J5, USB
CONNECTION
TO PC
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DEMO MANUAL DC2248A
Quick start proceDure
Download the LTC6951Wizard setup file at www.linear.
com/LTC6951Wizard.
Run the LTC6951Wizard setup file and follow the instruc-
tions given on the screen. The setup file will verify and/or
install Microsoft .NET and install the LTC6951Wizard. Refer
to the LTC6951Wizard Help menu for software operation.
DC2248A Configuration
1. Connect J15 and J16 to a power supply and apply power
(see Figure 1 and the Typical DC2248A Requirements
and Characteristics table). The three green power supply
LEDs (D2, D3, D4) should illuminate at this point.
2. Connect the DC2026 (or DC590B) to the DC2248A with
the provided ribbon cable.
3. Run the LTC6951Wizard application.
4. In LTC6951Wizard, click File → Load Settings and select
file “ALL_CHAN_600MHz.6951set”. The DC2248A’s
red STATUS LED (D1) should illuminate after step 4. A
600MHz signal should be present on all outputs.
5. Synchronize outputs by toggling the LTC6951 SSYNC
bit from the LTC6951Wizard.
Be sure to power down or terminate any unused RF output
with 50Ω, or poor spurious performance may result.
Figure 3. LTC6951Wizard Screenshot
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DEMO MANUAL DC2248A
troubleshooting
If the green LEDs (D2, D3, or D4) do not illuminate:
1. Verify J15 measures between 6V and 9V (see the Typical
DC2248A Requirements and Characteristics table).
2. Verify JP1, JP2, JP3 jumpers are installed correctly
(refer to the DC2248A schematic sheet 3).
3. Verify the voltages at JP1, JP2, and JP3 are correct:
a. JP1 = 3.3V
b. JP2 = 5V
c. JP3 = 3.3V
If the red LED (D1) does not illuminate:
1. In LTC6951Wizard’s System tab click “Read All’.
LTC6951Wizard should match Figure 3. If not, see
“Verify DC2248A and LTC6951Wizard Communication.”
2. In LTC6951Wizard’s System tab, Under Status deselect
LOCK and select REFOK. If D1 was does not illuminate
then verify “V+XO” test point reads 3.3V.
Verify DC2248A and LTC6951Wizard Communication:
To verify communication with the DC2248A, the bottom
status line in LTC6951Wizard should read “LTC6951”
and “Comm Enabled” as shown in Figure 3. If not, then
perform the following steps:
1. Ensure the DC2026 (or DC590B) is connected to PC.
2. Disconnect and Reconnect DC2026 (or DC590B) to PC.
3. Ensure DC2026 (or DC590B) is connected to DC2248A.
4. Close LTC6951Wizard and restart.
5. If using the DC2026, Verify the DC2026 has the DC590B
Emulator sketch loaded by contacting the factory or
following these steps.
a. Download QuikEval
™
at
http://www.linear.com/designtools/software/#Data
b. Run QuikEval (Linduino connected to the PC)
If QuikEval does not find a DC590B, reload the DC590
Linduino sketch. To use the LTSketchbook refer to the Lin-
duino Quick Start tab at http://www.linear.com/solutions/
linduino for instructions on how to start using Linduino.
If DC2248A performance is less than the LTC6951
data sheet specifications or LTC6951Wizard
Simulation:
1. For unexpected spurious response, verify power sup-
plies are low noise and spurious free power supplies.
Power supplies that are based off a switching regulator
architecture are known to generate spurs on PLL/VCO
outputs.
2. For poor phase noise results, verify the phase noise
specifications of the phase noise measurement instru-
ment. Traditional spectrum analyzers have higher phase
noise than the LTC6951 and will degrade measurement
results. To measure phase noise performance it is
recommended to use a signal source analyzer, such
as Keysight’s (previously Agilent/HP) E5052.
Contact the factory for further troubleshooting.
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DEMO MANUAL DC2248A
Dc2248a reconfiguration
The following covers the hardware reconfiguration of the
DC2248A. Refer to LTC6951Wizard and the LTC6951 data
sheet to better understand how to change programmed
parameters on the DC2248A.
Power Supply Options
Table 1 provides the power supply options for DC2248A.
Any combination of onboard LDO or external supplies
is possible. By default the DC2248A is set up to use the
three onboard LDO’s.
Table 1. Power Supply Options
VOLTAGE,
COMPONENTS JUMPER ONBOARD LDO
EXTERNAL
SUPPLY
3.3V*,
U2 100MHz reference JP1
Short Jumper
Pins 1–2.
Apply 6V–9V to
J15/J16.
(Default Option).
Short Jumper
Pins 2–3. Apply
appropriate
voltage to
Jumper Pin 1.
5V,
U1 LTC6951 JP2
3.3V,
U1 LTC6951, U3, U4,
U5 and U9
JP3
* When using an external reference, power down the onboard reference
by shorting JP1 pins 2–3, or poor spurious performance may result.
LTC6951 6951SET Files
The LTC6951Wizard provides a 6951set file for all LTC6951
data sheet application examples and typical application
circuits. After loading a 6951 set file a pop-up window will
detail any user actions and board modifications required
for the selected file. These same user actions and board
modifications are listed in Table 5.
Loop Filter Design and Installation
Use 6951Wizard to select, design and simulate different
loop filters (see Frequently Asked Questions section, ques-
tion #3). Loop filter components RZ, CI1, CI2, CP, L1 and
R1 are located on the top side of the board. Loop filter
component C2 is located on the bottom side of the board.
Reference Options
Table 2 details the available reference options and board
modifications for each available option. The 6951set files
provided assume the frequency and noise profile of the
default reference. If a different reference is used, update the
reference frequency and noise profile in LTC6951Wizard
before simulating the LTC6951 under the Loop Design tab
(see Frequently Asked Questions section, question #3 and
the LTC6951Wizard Help menu).
Sync Options
The LTC6951 data sheet describes several synchroniza-
tion modes. After selecting the desired synchronization
mode, refer to Tables 3 and 4 to select a synchronization
programming option and the resulting DC2248A board
modifications. Refer to the LTC6951 data sheet for SYNC
timing and level requirements.
CML Outputs (OUT0, OUT1, OUT2, OUT3)
The DC2248A has four AC coupled CML outputs. To drive
50Ω impedance instruments connect OUTx+ to the instru-
ment and OUTx– to a 50Ω termination, or vice versa. Refer
to LTC6951 data sheet for differential termination options.
The V+BIAS turret provides an option to set the DC offset
level after the AC coupling capacitor. Modifications are
required to use the V+BIAS turret; refer to the DC2248A
schematic.
LVDS Output (OUT4)
The LVDS output is DC coupled without onboard termi-
nation by default. The DC2248A provides series and a
differential termination resistor options to accommodate
other termination networks described in the data sheet.
Table 2. Reference Options and Board Modifications
DEFAULT
OPTION
REFERENCE OPTION INSTALL DEPOPULATE LTC6951 PERFORMANCE COMMENTS
lOnboard NA NA Limited by onboard reference
at frequency offsets <10kHz
U2 reference footprint supports 5mm x 7.5mm
and 14mm x 9mm packages with 4 or 6 pins
External* C36
0402 1µF
C35 Best performance when using
an ultralow noise external
reference
For improved performance connect J12 to an
ultralow noise reference, such as the Wenzel
501-04517D.
* When using an external reference, power down the onboard reference by shorting JP1 pins 2-3, or poor spurious performance may result.
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DEMO MANUAL DC2248A
Table 3. LTC6951 Sync Mode Programming Options
LTC6951 SYNC MODE LTC6951
RAO BIT
SYNC PROGRAMMING OPTIONS
(See Table 4 for Board Modifications)
COMMENTS LTC6951
SSYNC BIT
ONBOARD
SYNC SWITCH
(SW1)*
SYNC SMA SYNC SMA
AND REF+ SMA
EZSync, STANDALONE 0 l l l l
EZSync, CONTROLLER 0 l l l Modify follower-driver outputs to be DC-coupled,
refer to LTC6951 and follower part number data
sheets for correct termination networks.
EZ204Sync 1 l l l l
EZParallelSync 1 l l l l
ParallelSync 1 l
* SW1 output is connected to a debounce circuit to ensure the SYNC pin receives a clean sync signal
Table 4. DC2248A Board Modifications for LTC6951 Sync Programming Options
DEFAULT
OPTION
SYNC PROGRAMMING
OPTION
R13 R54 U2, REFERENCE COMMENTS
lLTC6951 SSYNC bit 1kΩ Do Not Install Onboard or External, See Table 2 Refer to LTC6951 data sheet for EZSync timing
requirements.
Onboard Sync Switch (SW1) Depopulate 0Ω Onboard or External, see Table 2
SYNC SMA Depopulate Do Not Install Onboard or External, see Table 2
SYNC SMA and REF+ SMA Depopulate Do Not Install External Only, see Table 2 When using ParallelSync™ refer to LTC6951
data sheet for REF+ and SYNC pins timing
requirements.
Table 5. LTC6951Wizard Settings File
LTC6951Wizard FILE NAME USER ACTIONS BOARD MODIFICATIONS
ALL_CHAN_600MHz Toggle LTC6951 SSYNC register bit NA
6951_EZSYNC_STANDALONE
6951-1_EZSYNC_STANDALONE
Toggle LTC6951 SSYNC register bit NA
6951_EZSYNC_MULTI-CHIP
6951-1_EZSYNC_MULTI-CHIP
Toggle LTC6951 & LTC6954 SYNC Pin (EZSync timing) Refer to Tables 3 (EZSync CONTROLLER) and 4
6951_ParallelSync_MULTI-CHIP
6951-1_ParallelSync_MULTI-CHIP
Toggle LTC6951 CAL register bit
Toggle LTC6951 SYNC pin (SYNC to REF timing)
Refer to Table 2 (External Reference)
Refer to Tables 3 (ParallelSync) and 4
Loop Filter (values provided in LTC6951Wizard File)
6951_JESD204B
6951-1_JESD204B
Toggle LTC6951 SSYNC register bit Refer to Table 2 (External Reference)
Loop Filter (values provided in LTC6951Wizard File)
6951_FrontPage_LTC2107 NA NA
6951_ParallelSyncw6954 Toggle LTC6951 CAL register bit
Toggle LTC6951 SYNC pin (SYNC to REF timing)
Refer to Tables 3 (ParallelSync) and 4
6951_JESD204B_LTC2123 Toggle LTC6951 SSYNC register bit NA
Dc2248a reconfiguration
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DEMO MANUAL DC2248A
assembly options
Table 6. DC2248A Options and Frequency Ranges
ASSEMBLY VERSION PART NUMBER FREQUENCY RANGE
DC2248A-A LTC6951IUHF 1.95MHz to 2500MHz
DC2248A-B LTC6951IUHF-1 2.1MHz to 2700MHz
1 How do I use LTC6951Wizard to design a different
setup and loop filter, simulate results and program
the LTC6951?
In the LTC6951Wizard, select Help: Menu →Help. The
help file discusses the function of all LTC6951Wizard
menus and tabs. The help file also provides a step
by step example describing how to design a different
frequency plan, design and simulate a loop filter, and
how to program the LTC6951 with these new settings.
2. Can the LTC6951Wizard control an LTC6951 on a
board other than the DC2248A?
Yes, connect the DC2026 (or DC590) SPI lines to the
SPI interface of the LTC6951. Also, the LTC6951Wizard
allows communication to the DC2248A by sensing
resistors R34 and R35 in the DC2248A schematic. If
these resistors are not present, the LTC6951Wizard
freQuently askeD Questions
will not communicate with the LTC6951. To allow
LTC6951Wizard communication to other hardware,
install equivalent resistors in the appropriate location
on the backside of DC2026 J1 connector (or DC590B
J4 connector).
3. Does the LTC6951 have Linduino Code available?
Yes, download the LTC6951 sketch in the LTSketchbook.
To use the LTSketchbook and for instructions on how to
start using Linduino, refer to the Linduino QuickStart tab
at http://www.linear.com/solutions/linduino. This will
give programmers a head start in writing code for the
LTC6951. It is recommended to use LTC6951Wizard
to create the best possible register settings for all
conditions. These LTC6951 register settings from
LTC6951Wizard can be programmed in a lookup table.
At this point the lookup table and LTC6951 sketch can
aid in program development.
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DEMO MANUAL DC2248A
typical Dc2248a reQuirements anD characteristics
PARAMETER INPUT OR OUTPUT PHYSICAL LOCATION DETAILS
6V to 9V Power Supply Input J15 and J16 BNC banana jacks Default option, single supply: 6V–9V low-noise and spur-free
supply, 500mA*; Green LEDs D2, D3, and D4 illuminate
when power supplied.
OUT4+, OUT4–Two Outputs J1 and J2 SMA connectors** LVDS, DC coupled, 600MHz, 750mVpk differential, 1.23V
DC offset (if powered up)*. Requires 100Ω differential
termination.
OUT3+, OUT3–Two Outputs J3 and J4 SMA connectors** CML, AC coupled, 600MHz, 800mVpk differential.*
OUT0+, OUT0–Two Outputs J5 and J6 SMA connectors** CML, AC coupled, 600MHz, 800mVpk differential.*
OUT1+, OUT1–Two Outputs J7 and J8 SMA connectors** CML, AC coupled, 600MHz, 800mVpk differential.*
OUT2+, OUT2–Two Outputs J9 and J10 SMA connectors** CML, AC coupled, 600MHz, 800mVpk differential.*
SYNC Input J13 SMA connector or SYNC turret Default option, 1kΩ pull-down resistor. See Tables 3 and 4,
to ensure correct option is selected.
STAT Output STATUS turret Red LED D1 illuminates when STAT pin in high state.
Loop Bandwidth – Set by loop filter component values 344kHz*
3.3V Onboard Reference Supply Input JP1, Pin 1 Board modifications required for use, see Table 1.
5V LTC6951 Supply Input JP2, Pin 1 Board modifications required for use, see Table 1.
3.3V LTC6951 Supply Input JP3, Pin 1 Board modifications required for use, see Table 1.
REF+Input J12 SMA connector or REF+ turret Board Modifications required for use, see Table 2.
By default an onboard reference (U2) is connected.
REF–Input J11 SMA connector or REF– turret By default NOT INSTALLED.
TUNE Output/Input Test point Debug Only: connected to LTC6951 TUNE pin.
V+BIAS Input V+BIAS turret Board modifications required for use, refer to the schematic.
*These values are for the “ALL_CHAN_600MHz.6951set” file and the default onboard reference.
**Any unused RF output must be powered down or terminated with 50Ω, or poor spurious performance may result.
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DEMO MANUAL DC2248A
pcb layout
Top Layer
parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CI1 CAP., X7R, 68nF, 50V, 10%, 0603 MURATA, GRM188R71H683KA93D
2 0 CI2 CAP., 0805 OPT
3 1 CP CAP., X7R, 1200pF, 50V, 10%, 0603 MURATA, GRM188R71H122KA01D
4 7 C1, C9, C13, C19, C45, C50, C51 CAP., X7R, 0.01µF, 16V, 10%, 0402 AVX, 0402YC103KAT2A
5 1 C2 CAP., X7R, 820pF, 50V, 10%, 0603 MURATA, GRM188R71H821KA01
6 1 C3 CAP., X5R, 470nF, 10V, 10%, 0402 AVX, 0402ZD474KAT2A
7 19 C4, C6, C10, C11, C14-C17, C38-C42,
C44, C53, C58, C62, C71, C72
CAP., X7R, 0.1µF, 10V, 10%, 0402 AVX, 0402ZC104KAT2A
8 2 C5, C46 CAP., X7R, 1.0µF, 16V, 10%, 0603 TDK, C1608X7R1C105K
9 12 C7, C8, C12, C18, C21, C30-C35, C37 CAP., X5R, 1.0µF, 16V, 10%, 0402 AVX, 0402YD105KAT2A
10 0 C20, C23, C36, C54, C55, C59, C60,
C63-C68
CAP., 0402 OPT
11 7 C22, C43, C49, C52, C57, C61, C70 CAP., X7R, 10µF, 25V, 10%, 1206 MURATA, GRM31CR71E106KA12L
12 6 C24-C29 CAP., X7R, 0.01µF, 6.3V, 10%, 0201 AVX, 02016C103KAT2A
13 3 C47, C48, C69 CAP., TANT., 330µF, 10V, 10%, 7343 AVX, TPME337K010R0035
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DEMO MANUAL DC2248A
parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
14 0 C56 CAP., 1206 OPT
15 1 D1 LED, RED, LED-ROHM-SML-010VT ROHM, SML-010VTT86L
16 3 D2, D3, D4 LED, GREEN, LED-ROHM-SML-010FT ROHM, SML-010FTT86L
17 1 D5 LED, YELLOW, LED-ROHM-SML-010YT ROHM, SML-010YTT86L
18 11 E1-E11 TURRET, TESTPOINT 0.064" MILL-MAX, 2308-2-00-80-00-00-07-0
19 0 E12 TURRET, TESTPOINT 0.064" OPT
20 3 JP1, JP2, JP3 JMP, HD1X3, .079CC SULLINS, NRPN031PAEN-RC
21 12 J1-J10, J12, J13, J11 CONN., SMA 50-OHM EDGE-LAUNCH EMERSON, 142-0701-851
23 1 J14 CONN., HEADER, 14 PIN, 2mm MOLEX, 87831-1420
24 2 J15, J16 JACK, BANANA KEYSTONE, 575-4
25 1 L1 IND., 0Ω, 0805 VISHAY, CRCW08050000Z0EA
26 8 L2-L9 IND, FERRITE BEAD, L-0603LS-1608 TAIYO YUDEN, FBMH1608HL331-T
27 2 R1, RZ RES., CHIP, 63.4, 1%, 0603 NIC, NRC06F63R4TRF
28 0 R2, R5-R7, R10, R11, R14, R16,
R18, R20, R22-R24, R53, R54
RES., 0402 OPT
29 6 R3, R4, R8, R17, R19, R55 RES., CHIP, 0, 0402 VISHAY, CRCW04020000Z0EA
30 1 R9 RES., CHIP, 10, 1/16W, 1%, 0402 VISHAY, CRCW04210ROFKED
31 3 R12, R39, R42 RES., CHIP, 280 1/16W, 5%, 0402 NIC, NRC04J281TRF
32 1 R13 RES., CHIP, 1k, 1/16W, 1%, 0402 NIC, NRC04F1001TRF
33 1 R15 RES., CHIP, 330, 1/16W, 1%, 0402 NIC, NRC04F3300TRF
34 3 R21, R36, R47 RES., CHIP, 0Ω, 0603 NIC, NRC06Z0TRER
35 5 R25, R28, R29, R30, R37 RES., CHIP, 100Ω 1/16W, 5%, 0402 NIC, NRC04J101TRF
36 1 R26 RES., CHIP, 49.9Ω, 1/16W, 1%, 0402 NIC, NRC04F49R9TRF
37 4 R27, R31, R32, R38 RES., CHIP, 200k, 1/16W, 1%, 0402 NIC, NRC04F2003TRF
38 5 R33, R34, R35, R51, R52 RES., CHIP, 4.99k, 1/16W, 1%, 0402 NIC, NRC04F4991TRF
39 1 R40 RES., CHIP, 17.8k, 1/16W, 1%, 0402 NIC, NRC04F1782TRF
40 3 R41, R45, R50 RES., CHIP, 10k, 1/16W, 1%, 0402 VISHAY, CRCW040210KOFKED
41 1 R43 RES., CHIP, 619Ω 1/16W, 1%, 0402 NIC, NRC04F6190TRF
42 1 R44 RES., CHIP, 31.6k, 1/16W, 1%, 0402 NIC, NRC04F3162TRF
43 2 R46, R48 RES., CHIP, 1M, 1/16W, 1%, 0402 NIC, NRC04F1004TRF
44 1 R49 RES., CHIP, 17.4k, 1/16W, 1%, 0402 NIC, NRC04F1742TRF
45 1 SW1 SWITCH, SLIDE SPDT 30V 0.2A, SW-EG1218 E-SWITCH, EG1218
46 1 U1 I.C., QFN40UHF-5X7 LINEAR TECH., LTC6951IUHF
47 1 U2 I.C., 100MHz OSCILLATOR, OSC-VCXO/CVS575S CRYSTEK, CCHD-575-25-100.00
48 2 U3, U4 I.C., DUAL BUFFER, SC70-6 FAIRCHILD SEMI., NC7WZ17P6X
49 1 U5 I.C., SINGLE BIT, DUAL SUPPLY, 3-STATE OUTPUT,
SOT363
NXP SEMI., 74LVC1T45GW
50 1 U6 I.C., SERIAL EEPROM, TSSOP8 MICROCHIP, 24LC025-I /ST
51 1 U7 I.C., 300mA LOW NOISE LDO REGULATOR, MS8 LINEAR TECH., LT1962EMS8
52 1 U8 I.C., REG LDO ADJ 0.75A/0.25A, QFN28UFD-4X5 LINEAR TECH., LT3030EUFD
53 1 U9 I.C., DUAL 2-INPUT POSITIVE-NAND GATE, US8 TI, SN74LVC2G00DCU
53 3 SHUNT ON JP1-JP3 PINS 1&2 SHUNT, 2mm CTRS. SAMTEC 2SN-BK-G
DC2248A-A Required Circuit Components
1 1 DC2248A2-GENERAL BOM
2 1 U1 I.C., QFN40UHF-5X7 LINEAR TECH., LTC6951IUHF
DC2248A-B Required Circuit Components
1 1 DC2248A2-GENERAL BOM
2 1 U1 I.C., QFN40UHF-5X7 LINEAR TECH., LTC6951IUHF-1
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dc2248af
DEMO MANUAL DC2248A
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402
2. ALL CAPACITORS ARE IN MICROFARADS, 0402.
ASSY
A
U1
LTC6951
Fout =
2.5GHz
*SUFFIX
*
B LTC6951 - 1 - 1 2.7GHz
5V
5V
3.3V
3.3V
V+OUT
V+OUT
V+BIAS
3.3V
3.3V_REF
V+BIAS
V+BIAS
V+BIAS
V+BIAS
V+BIAS
V+BIAS
V+BIAS
V+OUT
3.3V
3.3V
3.3V
SDO
SCLK
SDI
CS
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
13
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
13
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
13
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
CHRIS P.PRODUCTION
__ 2 09-30-15
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
CHRIS P.PRODUCTION
__ 2 09-30-15
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
CHRIS P.PRODUCTION
__ 2 09-30-15
C28
0.01uF
0201
C71
0.1uF
C17
0.1uF
R2
OPT
C24
0.01uF
0201
J6
SMA
OUT0-
J7
SMA
OUT1+
C37
1uF
CI2 0805
OPT
U9
SN74LVC2G00DCU
1A
1
1B
2
2Y
3
2A 5
2B 6
VCC 8
1Y 7
GND
4
E3
SYNC
R4
0
R53
OPT
L2
FBMH1608HL331-T
R16
OPT
R9
10
J4
SMA
OUT3-
C18
1uF
R22
OPT
C3
470nF
J13
SMA
SYNC
L1
0 ohm
0805
V+XO
C26
0.01uF
0201
C16
0.1uF
J2
SMA
OUT4-
J3
SMA
OUT3+
R24
OPT
R11
OPT
C23
OPT
R54
OPT
R7
OPT
L8
FBMH1608HL331-T
RZ
63.4
0603
J9
SMA
OUT2+
C72
0.1uF
R12
280
EN-XO
D1
RED
STATUS
2 1
R15
330
C12
1uF
U1
LTC6951
GND
32
V+VCO
31
BVCO
30
GND
29
CMA
28
CMB
27
CMC
26
GND
25
TB
24
TUNE
23
OUT4- 14
V+OUT 1
OUT2- 2
OUT2+ 3
V+OUT 4
OUT1- 5
OUT1+ 6
V+OUT 7
OUT0- 8
OUT0+ 9
V+OUT 10
OUT3- 11
OUT3+ 12
SYNC
39
STAT
38
V+OUT 13
SDO 20
CS 17
SDI 19
V+D 16
V+RF
21
BB
22
SCLK 18
REF+
37
REF-
36
CP
34
V+REF
35
OUT4+ 15
V+CP
33
GND
40
GND
41
C10
0.1uF
R17
0
C15
0.1uF
C19
0.01uF
R8
0
J10
SMA
OUT2-
J12
SMA
REF+
C2
820pF
0603
C4
0.1uF
R19
0
R51
4.99K
R5
OPT
L9
FBMH1608HL331-T
C30
1uF
C7 1uF
R18
OPT
R3
0
C29
0.01uF
0201
E2
REF+
R20
OPT
C35
1uF
L3
FBMH1608HL331-T
C5
1uF
0603
U2
CCHD-575-25-100
VTUNE
1
EN
2
GND
3OUT+ 4
OUT- 5
VCC 6
C21
1uF
R52
4.99k
J11
SMA
REF-
C13
0.01uF
D5
YELLOW
SYNCON
21
C25
0.01uF
0201
R14
OPT
C34
1uF
C11
0.1uF
CP
1.2nF
0603
C9
0.01uF
R25
200
J5
SMA
OUT0+
J1
SMA
OUT4+
R13
1k
C1
0.01uF
R21
0
0603
R23
OPT
C27
0.01uF
0201
C6
0.1uF
E9
GND
SW1
EG1218
SYNCON OFF
13
2
C33
1uF C32
1uF C31
1uF
E4
GND
C36
OPT
R6
OPT
E10
GND
E12
REF-
CI1
68nF 0603
C22
10uF
1206
R26
49.9
TUNE
R10
OPT
E1
STATUS
R55
0
C20
OPT
J8
SMA
OUT1-
R1
63.4
0603
C8
1uF
C14
0.1uF
E11
GND
12
dc2248af
DEMO MANUAL DC2248A
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
NOTE: EEPROM FOR BOARD IDENTIFICATION
DC590 SPI INTERFACE
3.3V
3.3V
3.3V
3.3V
CS
SCLK
SDI
SDO
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
23
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
23
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
23
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
R36
0
0603
R27
200K
EEGND
R31
200K
R29
100
R32
200K
GND VCC
U4
NC7WZ17P6X
1 6
43
52
R37
100
GND VCC
U3
NC7WZ17P6X
1 6
43
52
V+DIG
C38 0.1uF
R30
100
R28
100
C40
0.1uF
R38
200K
C39
0.1uF
SCLK
R34
4.99K
WP
SDOSDI
C41
0.1uF
R35
4.99K
CS
C42
0.1uF
R33
4.99K
J14
HD2X7-079-MOLEX
MOSI/SDA 7
EESDA 9
V+ 1
5V 2
CS 6
SCK/SCL 4
EEVCC 10
MISO 5
EESCL 11
EEGND 12
AUX 14
GND
3
GND
13
GND
8
GND DIR
VCC(A) VCC(B)
U5
74LVC1T45GW
1 6
43
52
EEPROM
ARRAY
U6
24LC025-I /ST
SDA
5
VCC 8
A0
1A1
2A2
3
GND
4
WP
7
SCL
6
Note: The buffers shown on sheet 2 of 2 of the schematic are used to protect the LTC6951 when connected to Linduino before the LTC6951 is powered
up. There is no need for such circuitry if the SPI bus is not active before powering up the LTC6951. The EEPROM is for identification and is not needed to
program the LTC6951.
13
dc2248af
DEMO MANUAL DC2248A
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
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
POWER SUPPLIES
V+BIAS
3.3V
5V
5V
3.3V
3.3V_REF
3.3V_REF
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
33
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
33
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 2248A
Wednesday, September 30, 2015
33
ULTRALOW JITTER MULTI-OUTPUT CLOCK
N/A
LTC6951IUHF
KIM T.
CHRIS P.
SYNTHESIZER WITH INTEGRATED VCO
R41
10K
+
C47
330uF
10V
7343
C51
0.01uF
C63
OPT
U7
LT1962EMS8
SHDN
5
IN
8OUT 1
ADJ 2
BYP 3
GND 4
NC
7
NC
6
E7
GND
R42
280
C43
10uF
1206
C65
OPT
+
C48
330uF
10V
7343
L5
FBMH1608HL331-T
D2
GREEN
3.3V
21
R49
17.4K
C46
1uF
0603
R40
17.8K C45
0.01uF
E6
V+REBIAS
E5
C70
10uF
1206
C62
0.1uF
JP3
3.3V
HD1X3-079
NC
3.3V
1
3
2
C55
OPT
R47
0
0603
L6
FBMH1608HL331-T
C64
OPT
C50
0.01uF
C49
10uF
1206
C54
OPT
R43
619
C68
OPT
R48
1M
+
C69
330uF
10V
7343
C58
0.1uF
C61
10uF
1206
E8
L4
FBMH1608HL331-T
R44
31.6K
R46
1M
C52
10uF
1206
JP2
5V
HD1X3-079
5V
NC
1
3
2
C44
0.1uF
J15
6V - 9V
JACK BANANA
C56
OPT
1206
JP1
3.3V_REF
HD1X3-079
3.3V_REF
NC
1
3
2
C60
OPT
R39
280
C53
0.1uF
C66
OPT
D4
GREEN
5V
21
D3
GREEN
3.3V_REF
21
C57
10uF
1206
C67
OPT
J16
GND
JACK BANANA
R45
10K
R50
10K
U8
LT3030EUFD
BYP1
28
IN1
20
BYP2 9
ADJ2 10
EP 29
ADJ1
27
SHDN1
23
OUT1
2
SHDN2 14
OUT2 8
IN2
17
OUT1
1OUT2 7
IN1
21
IN2
16
PWRGD1
22
GND
19
GND
24
GND
25
GND
3
GND
4
GND 18
GND 13
GND 12
GND 11
GND 6
GND 5
GND
26
PWRGD2 15
L7
FBMH1608HL331-T
C59
OPT
14
dc2248af
DEMO MANUAL DC2248A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2015
LT 1215 • 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
Copyright © 2004, Linear Technology Corporation
