National Semiconductor ADC10DV200, ADC11DV200 User Manual
National Semiconductor
Evaluation Board User’s Guide
ADC10DV200, 10-Bit, 200 Msps A/D Converter
ADC11DV200, 11-Bit, 200 Msps A/D Converter
June 2009
Rev 0.9
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© 2009 National Semiconductor Corporation.
Table of Contents
1.0 Introduction......................................................................................................................................... 3
2.0 Board Assembly .................................................................................................................................. 3
3.0 Quick Start........................................................................................................................................... 4
4.0 Functional Description ........................................................................................................................ 4
4.1 Analog Input ......................................................................................................................... 4
4.2 ADC reference circuitry........................................................................................................5
4.3 ADC clock circuit ................................................................................................................. 5
4.4 Digital Data Output...............................................................................................................5
4.5 Data Format/ Duty Cycle Stabilizer..................................................................................... 5
4.6 Power Supply Connections ................................................................................................... 5
5.0 Installing the ADC10DV200 Evaluation Board..................................................................................5
6.0 Hardware Schematic............................................................................................................................ 6
7.0 Evaluation Board Layout..................................................................................................................... 12
8.0 Evaluation Board Bill of Materials...................................................................................................... 15
A1.0 Operating in the Computer Mode..................................................................................................... 17
A2.0 Summary Tables of Test Points, Connectors, and Jumper Settings................................................. 17
A2.1 Test Points.......................................................................................................................... 17
A2.2 Connectors.......................................................................................................................... 17
A2.3 Jumper settings................................................................................................................... 17
A2.4 Clock Circuit Solder Jumper settings................................................................................. 18
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1.0 Introduction
This Evaluation Board may be used to evaluate the
ADC10DV200, or ADC11DV200. The ADC is one of a
family of 10 and 11 bit converters that provides data at
rates of up to 200MHz. Further reference in this manual
to the ADC10DV200 is meant to also include the other
frequency domain plot, shows dynamic performance in
the form of SNR, SINAD, THD and SFDR. The latest
WaveVision hardware and software is available through
the National Semiconductor website:
http://www.national.com/store/view_item/index.html?nsid=
WAVEVSN+BRD+5.1
listed parts unless otherwise specified
The evaluation board is designed to be used with the
WaveVision5™ Data Capture Board which is connected
to a personal computer through a USB port and running
WaveVision5™ software, operating under Microsoft
Windows. The software can perform an FFT on the
captured data upon command and, in addition to a
JR507
+5V
J301
Channel B
Input
2.0 Board Assembly
The ADC10DV200 Evaluation Board comes preassembled. Refer to the Bill of Materials in Section 8 for a
description of components, to Figure 1 for major
component placement and to Section 6 for the Evaluation
Board schematic.
ADC10DV200
or
ADC11DV200
J201
CLK
JP401
PDA
WV5
Connector
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J302
Channel A
Input
J101
VREF
J401
DF/DCS
JP401
PDA
Figure 1. Major Component and Jumper Locations
Figure 2. Test Set up
3.0 Quick Start
Refer to Figure 1 for locations of jumpers, test points and
major components. Refer to Figure 2 for the test set up.
The board is configured by default to use a external clock
source and internal reference. Refer to Section 4.0 and
the Appendix for more information on jumper settings.
The input network of this board is configured for input
frequencies greater than 70MHz. Refer to Section 4.1 for
more information about input networks.
You must have version 5.0 or later of the WaveVision™
software to properly test this board. You can download
the latest version from:
http://www.national.com/analog/adc/wavevision5
1. Apply power to the WaveVision5™ board and
connect it to the computer using a USB cable. See
the WaveVision5™ Board Manual for operation of
that board. Connect the evaluation board to the
WaveVision™ Digital Interface Board.
2. Connect a clean +5V power supply to pin 2 of Power
Connector JR507. Pin 1 is ground.
3. Connect a signal from a 50-Ohm source to
connector J301 or J302. Be sure to use a bandpass
filter before the Evaluation Board.
4. Adjust the input signal amplitude as needed to
ensure that the signal does not over-range by
examinining a histogram of the output data with the
WaveVision5™ software.
4.0 Functional Description
The ADC10DV200 Evaluation Board schematic is shown
in Section 6. A list of test points and jumper settings can
be found in the Appendix.
4.1 Analog Input
To obtain the best distortion results the analog input
network must be optimized for the signal frequency being
applied. The ADC10DV200 Evaluation Board comes
configured as seen in Figure 3.
Figure 3. Analog Input Network for FIN > 70MHz
The input network is intended to accept a low-noise sine
wave and will perform well over a wide input frequency
range. To accurately evaluate the dynamic performance
of this converter, the input test signal will have to be
passed through a high-quality bandpass filter.
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Input signals can also be amplified using an onboard
LMH6517 DVGA (U601). To use the DVGA, some
components must be installed and some removed. The
following components must be installed: R651-R656. The
following components must be removed: R302, R303,
R309, and R310. Then connect signals from a 50-Ohm
source to connectors J601 and J607.
4.2 ADC reference circuitry
The ADC10DV200 can use an internal or external voltage
reference. The internal reference is selectable between a
0.75V or 0.5V reference. External references can be set
from 0.2V to 1.4V. This Evaluation Board is configured to
use the internal 0.75V reference.
4.3 ADC clock circuit
Components can be installed or removed to select the
path of the clock to the ADC. While not as convenient as
pin-type jumpers, these introduce less distortion into the
clock signal.
Care must be taken to provide a high quality low jitter
clock source. A single ended input clock can be buffered
by U203 (NC7SV125) and applied to the ADC’s clock
input pin. Or U203 can be bypassed and the input clock
pin driven directly.
A differential clock can also be applied to the ADC’s clock
input pins through U201 (ETC-1-13).
Refer to Appendix A to configure the clock for your
application. The Evaluation Board is configured by default
to use a single ended clock to drive the input pins directly.
should be connected to the Signal Input SMA connectors
J301 or J302. When evaluating dynamic performance, an
appropriate signal generator (such as the HP8644B or the
R&S SME-03) with 50 Ohm source impedance should be
connected to the Analog Input connector through an
appropriate bandpass filter as even the best signal
generator available can not produce a signal pure enough
to evaluate the dynamic performance of an ADC.
If this board is used in conjunction with the
WaveVision5™ Data Capture Board and WaveVision5™
software, a USB must be connected between the Data
Capture Board Board and the host. See the
WaveVision5™ Data Capture Board manual for details.
4.4 Digital Data Output
The LVDS digital output data is available for probing at
test points TP601 through TP624. The signals are also
available at the WaveVision™ (WV5) connector J602.
4.5 Data Format/ Duty Cycle Stabilizer
Output data format and the duty cycle stabilizer (DCS)
are controlled by jumper J401.
Shorting pins 1-2 of J401 sets the output format to offset
binary with DCS On. This is the default setting.
Shorting pins 3-4 of J401 sets the output format to 2’s
complement with DCS Off.
Shorting pins 5-6 of J401 sets the output format to offset
binary with DCS Off.
Shorting pins 7-8 of J401 sets the output format to 2’s
complement with DCS On.
4.6 Power Supply Connections
Power to this board is supplied through power connector
J507. The only supply needed is +5V at pin 2 plus ground
at pin 1.
Voltage and current requirements for the ADC10DV200
Evaluation Board are:
+5.0V at 500 mA
5.0 Installing the ADC10DV200 Evaluation Board
The evaluation board requires power supplies as
described in Section 4.6. An appropriate signal source
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6.0 Hardware Schematic
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