DC718C - Demo Manual

DEMO MANUAL DC718
Quick Start Guide for DC718
DESCRIPTION
PScope™ software along with demonstration circuit
DC718 provides a USB based Windows PC hosted digital
data acquisition system supporting CMOS/LVTTL output
ADCs up to 135Msps. The DC718 can be powered from
either the USB port or from an external 6VDC to 9VDC
power supply (for lower noise operation). The Linear Technology supplied PScope evaluation software automatically
detects the DC718 and in select cases can also detect the
ADC demonstration circuit under evaluation. This system
provides for fast and easy performance evaluation of high
speed ADCs by collecting up to 128k word samples and
then performing various analyses on the data including
calculating SNR, SINAD, THD, SFDR, ENOB and displaying
the digitized input, an FFT of the data, the primitive wave
of the sample set or a IFFT of modified frequency domain
data to facilitate analyzing distortion products and sources.
Figure 1 shows a block diagram of the DC718. The DC718
is connected to the ADC demonstration circuit via a 40-pin
edge connector, to the PC by a USB A-B cable and to an
optional power supply by a 5mm plug.
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.
DATA
SRAM
TRIGGER
INPUT
DATA
J7
SAMPLE
CLOCK
SIGNAL
INPUT
DEMONSTRATION
CIRCUIT
CONV
CLK
OF
DATA
FLAG
BUS
CPLD
USB CONTROLLER
POWER
USB
ADDRESS
8-BIT DATA BUS
PIC_CLK
CNTL_DATA
DATA_RDY
MICROPROCESSOR
STATUS INDICATORS
TRANSFER
RST
SEEP
OVERFLOW
RUN
PWR ON
DATA_RDY
TRIGGER
POWER
SUPPLY
OPTIONAL
EXT 6VDC TO 9VDC
DC718 F01
Figure 1. DC718 Block Diagram
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DEMO MANUAL DC718
OPERATING PRINCIPLES
The DC718 is capable of collecting a block of data samples
from an ADC demonstration circuit initiated either by an
internal generated trigger or an externally supplied trigger of user-selected polarity. The external trigger is TTL
or 3.3V CMOS compatible. Refer to the PScope software
help for information on the various operating modes and
options. The conversion clock to the DC718 is supplied via
the ADC demonstration circuit either from an optional on
board oscillator or an external signal generator connected
to the ADC demonstration circuit.
QUICK START PROCEDURE
To prevent damage to the DC718, it is important to follow
the equipment setup procedure outlined below:
1. Do not plug the DC718 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 DC718 to the USB port and supply external
power to the DC718, if desired.
6. Apply power to the ADC demonstration circuit.
7. Apply an appropriate conversion clock and analog input
signal to the ADC demonstration board.
8. ADC board will be automatically detected and configured.
9. Enter the sample rate and select the sample size in the
provided fields in PScope.
10. Initiate a data collection cycle via the evaluation software. See online help for specific guidance on using
the PScope software.
11. Each 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.
5. Connect the ADC demonstration circuit to the DC718
via the 40-pin edge connector.
EXT TRIGGER INPUT
DC718
EXT 6VDC
TO 9VDC
USB
CONNECTOR
DEMONSTRATION
CIRCUIT
Figure 2. Basic Connection Locations
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DEMO MANUAL DC718
USEFUL SOFTWARE TOOLS
The PScope software includes tools for automatic software
updates and for quickly retrieving documentation from
the world wide web.
To update the PScope software (requires an internet
connection):
NOTE: Adobe Acrobat reader is required to view the documents and is available at http://www.adobe.com.
This automatically updates the main program and drivers
for individual demo circuits.
• Choose Update Program from the tools menu.
OPTIONAL CONNECTIONS TO THE DC718
In most cases the DC718 can operate from the USB
power except were very high speed operation exceeds the
power limits of the USB port or extremely noise sensitive
measurements require laboratory grade power. Adding a
ferrite common mode filter to the USB cable may reduce
noise in these cases. The DC718 provides a connector for
a 5mm power plug at 6V to 9V. Inserting this connector
into the 5mm power jack automatically disconnects USB
power from the board.
The DC718 has provisions for an external trigger input,
polarity selectable by software. This permits initiating data
block capture by an external event.
Do not connect anything to J1, J2, J3 or SV1.
J4 is an I2C port. J8 is a test port for CPLD software
development and is not populated.
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DEMO MANUAL DC718
LED INDICATORS
The DC718 provides system status via 8 LEDs:
LED-1. TRANSFER – Indicates a data transfer from the
PScope to the PC.
LED-2. SEEP – Indicates presence/access of the optional
demonstration circuit serial electrically erasable
PROM on select demonstration boards permitting PScope software to automatically identify the
device being evaluated.
LED-5. OVERFLOW – Indicates an overflow occurred during the last block acquisition.
LED-6. D_RDY – Indicates completion of data block
acquisition.
LED-7. RUN – Indicates the board is ARMED to collect a
block of data.
LED-8. TRIG – Indicates that a trigger was received and
data collection has started.
LED-3. RST – Indicates assertion of either a hard or soft
reset.
LED-4. POWER – Power on indicator.
CIRCUIT DETAILS
A schematic is attached to the end of this quick start guide
for reference only.
TROUBLE SHOOTING GUIDE
Problem: DC718 is plugged in, but PScope software still
does not recognize DC718 board.
Problem: Demonstration circuit software loads properly,
but will not run or gives device not accessible errors.
Solution: Assuming that the USB hardware in your computer 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 DC718 as an unknown device.
If this is the case, the problem can be corrected by the
following procedure:
Solution: Verify that the demonstration circuit is properly
powered up and that a correct (signal level and frequency)
conversion clock is applied. (The DC718 is powered from
the USB port. If an external USB port expansion unit which
does not provide power is used to connect the DC718
to the PC, an external 6V to 9V must be provided to the
DC718.) Set the sample rate for the applied conversion
clock as PScope software uses the sample size and rate to
determine the time out period for resetting the DC718 if the
USB should hang. Refer to the appropriate demonstration
circuit quick start guide for details.
1) Unplug the DC718 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 in-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 the
LTC staff.
Problem: Collected data samples look like noise or appear
corrupted.
Solution: Make sure the proper device has been selected
in the PScope software otherwise the captured data will
not be properly interpreted.
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DEMO MANUAL DC718
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
TAIYO YUDEN LMK316B7225KL-T
1
2
C32, C35
CAP, X7R 2.2μF 10V 10% 1206
2
2
C39, C41
CAP, X5R 10μF 6.3V 20% 1206
TAIYO YUDEN JMK316BJ106ML-T
3
4
C33, C38, C40, C62
CAP, X7R 0.01μF 16V 10% 0603
AVX 0603YC103KAT
4
1
C36
CAP, 330μF 16V 20PCT
NICHICON UPL1C331MPH6
5
1
C37
CAP, X5R 1μF 16V 20% 1206
TAIYO YUDEN EMK316BJ105MF-T
6
1
C44
CAP, X7R 1000pF 25V 10% 0603
AVX 06033C102KAT2A
7
38
C3, C4, C11 TO C31, C34,
C45 TO C50, C52 TO C59
CAP, X7R 0.1μF 16V 10% 0603
AVX 0603YC104KAT
8
1
C51
CAP, X7R, 100pF 25V 10% 0603
AVX 06033C101KAT
9
2
C1, C2
CAP, NPO 22pF 50V 10% 0603
AVX 06035A220KAT
10
2
C8, C60
CAP, X5R 0.47μF 16V 20% 0603
AVX 0603YD474MAT
11
2
C9, C10
CAP, X7R 2200pF 25V 10% 0603
AVX 06033C222KAT2A
12
1
D10
DIODE, BAT54S SCHOTTKY SOT23
DIODES INC BAT54S
13
8
D1 TO D8
LED, GRN 0603
LITE ON LTST-C190KGKT
14
1
D9
DIODE, BAT54WS SCHOTTKY SOD323
DIODES INC BAT54WS-7
15
5
G1 TO G3, G5, G7
TURRET
MILL MAX 2308-2
16
1
J1
HEADER, 3×2, 2mm
COMM CON 2202S-06G2
17
1
J2
HEADER, 2×7, 2mm
MOLEX, 87331-1420
18
1
J6
CON, USB-B, 4 PINS, SINGLE THR. HOLE
MILL-MAX, 897-30-004-90-000
19
1
J7
CONNECTOR, 20×2, 0.100
COMM CON 1116-40-G2
20
1
J9
CONNECTOR, POWER 5mm
CUI INC PJ-002A-SMT
21
1
L1
CHOKE, COMMON MODE, QUAD, 5μH
COILCRAFT TTDLF4500
22
1
Q1
XSTR, NPN,GP, SOT23
DIODES INC MMBT3904
23
1
Q2
XSTR, MOSFET, 8-PIN MSOP
ZETEX ZXM64P02XTA
24
6
R7, R15, R16, R46, R51, R53
RES, 10k 1% 1/16W 0603
AAC CR16-1002FM
25
2
R11, R52
RES, 1.5k 1% 1/16W 0603
AAC CR16-1501FM
26
3
R12, R13, R23
RES, 22.1Ω 1% 1/16W 0603
AAC CR16-22R1FM
27
2
R14, R50
RES, 2.21k 1% 1/16W 0603
AAC CR16-2211FM
28
1
R18
RES, 47.5k 1% 1/16W 0603
AAC CR16-4752FM
29
1
R47
RES, 100Ω 1% 1/16W 0603
AAC CR16-1000FM
30
2
R20, R24
RES, 49.9Ω 1% 1/16W 0603
AAC CR16-49R9FM
31
1
R3
RES, 66.5k 1% 1/16W 0603
AAC CR16-6652FM
32
3
R33, R42, R49
RES, 33.2Ω 1% 1/16W 0603
AAC CR16-33R2FM
33
2
R35, R36
RES 2×4 ARRAY, CHIP, 100Ω, ISO
ROHM MNR14E0ABJ101
34
5
R37, TO R41
RES 2×4 ARRAY, CHIP, 33Ω, ISO
ROHM MNR14E0ABJ330
35
3
R4, R19, R21
RES, 4.75k 1% 1/16W 0603
AAC CR16-4751FM
36
1
R43
RES, 499Ω 1% 1/16W 0603
AAC CR16-4990FM
37
1
R5
RES, 33.2k 1% 1/16W 0603
AAC CR16-3322FM
38
3
R6, R17, R22
RES, 100k 1% 1/16W 0603
AAC CR16-1003FM
39
3
R44, R45, R48
RES, 1.00k 1% 1/16W 0603
AAC CR16-1001FM
40
10
R9 TO R10, R25 TO R32
RES, 475Ω 1% 1/16W 0603
AAC CR16-4750FM
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DEMO MANUAL DC718
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
41
1
SW1
SWITCH, LIGHT TOUCH, 2 PINS
PANASONIC, EVQPPDA25
42
1
X1
CONN, BNC 50Ω
CONNEX 112404
43
1
U10
IC, EEPROM,1k, MICROWIRE, SOT6
MICROCHIP, 93C46BT-I/OT
44
1
U14
IC, VREG, LIN, 5V
LINEAR TECHNOLOGY LT1129CQ-5
45
2
U11, U12
IC, ANALOG SW, SPST, DUAL
FAIRCHILD NC7WB66K8X
46
1
U1
IC, CPLD, 256 MACROCELL,TQPF144
XILINX XC2C256-6TQG144C
47
1
U6
IC, MICROCNTLR, 4KFLASH, 192RAM
MICROPCHIP PIC16F73-I/SS
48
1
U4
IC, SI-OSC, 96/48/24MHZ, SOT5
LINEAR TECHNOLOGY LTC6905IS5-96#PBF
49
1
U13
IC, SI-OSC, ADJ, SOT5
LINEAR TECHNOLOGY LTC1799IS5#PBF
49a
1
U2
IC, SYNC-SRAM, 18X256K
IDT, IDT71V3558S166PF
50
0
U2 (ALTERNATE PART NUMBER)
IC, SYNC-SRAM, 18X512K
IDT, IDT71V65803S150PF
51
1
U7
IC, USB CNTLR, LQFP32
FUTURE TECH, (FTDICHIP) FT245BM
52
1
U5
IC, VMONITOR, TRIPLE, 5V/3.3V/ADJ
LINEAR TECHNOLOGY LTC1726EMS8-5#PBF
53
1
U9
IC, VREG, LIN, 1.8V, MS8
LINEAR TECHNOLOGY LT1962EMS8-1.8#PBF
54
1
U8
IC, VREG, LIN, 3.3V, SO8
LINEAR TECHNOLOGY LT1763CS8-3.3#PBF
55
1
U3
IC, VREG, LIN, 3.3V, SOT5
LINEAR TECHNOLOGY LTC1844ES5-3.3#PBF
56
4
STAND OFF, 1/4 × 4-40
MICROPLASTIC
57
4
SCREW, 4-40- 1/4"
SCREW
58
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT #718C2
59
2
STENCIL
STENCIL #718C2
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DEMO MANUAL DC718
SCHEMATIC DIAGRAM
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DEMO MANUAL DC718
SCHEMATIC DIAGRAM
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DEMO MANUAL DC718
SCHEMATIC DIAGRAM
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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.
9
DEMO MANUAL DC718
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 application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc718f
10 Linear Technology Corporation
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●
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