LM96511 Ultrasound Receive Analog Front End (AFE)
Evaluation Board User’s Guide
www.national.com
© 2010 National Semiconductor Corp.
Rev. 1.0
pg 1
LMH96511 Evaluation Board user’s Guide
August 2010
LMH96511 Evaluation Board user’s Guide
Table of Contents
1.0
1.1
1.2
2.0
3.0
3.1
3.2
3.3
3.4
3.5
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
GENERAL DESCRIPTION ....................................................................................................... 3
Packing List............................................................................................................................... 3
References................................................................................................................................ 3
BOARD ASSEMBLY & ORIENTATION.................................................................................... 3
QUICK START-UP INSTRUCTIONS........................................................................................ 5
WaveVision5™ Software Installation ........................................................................................ 5
Default Jumper Settings............................................................................................................ 5
Powering Up and Connecting the Evaluation & WaveVision5™ Boards.................................. 5
B-Mode Signal Path Test .......................................................................................................... 7
CW-Mode Signal Path Test ...................................................................................................... 7
FUNCTIONAL DESCRIPTIONS ............................................................................................... 8
Analog Input (Channels 0 – 7) .................................................................................................. 8
ADC Input Clock........................................................................................................................ 8
CW Doppler Demodulator I&Q Output (Channels 0 – 7) .......................................................... 8
DVGA Controls.......................................................................................................................... 9
TGC and Periodic Gated Captures ........................................................................................... 9
Global Logic Controls................................................................................................................ 9
Power ...................................................................................................................................... 10
WaveVision5™ Mating Connectors ........................................................................................ 10
Test Points .............................................................................................................................. 10
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© 2010 National Semiconductor Corp.
Rev. 1.0
pg 2
1.1 Packing List
The LM96511 Evaluation Board is used to evaluate the
LM96511 8-Channel Ultrasound Receive Analog Front
End consisting of an integrated Low Noise Amplifier (LNA),
Digital Variable Gain Amplifier (DVGA), CW Doppler
Demodulator, and a 12-Bit Continuous Time ΣΔ ADC.
The LM96511 Evaluation Kit consists of the following
components:
The evaluation board is designed for use with the
WaveVision5™ Data Capture Board via USB connection
to a PC running the WaveVision5™ software. This ADC
data capture board and software offer time domain plots,
frequency domain plots, and calculates dynamic
performance of the LM96511 such as SNR, SINAD, THD,
SFDR, and ENOB.
The evaluation board offers provisions for externally
synchronizing the gain ramp period of the DVGA for Time
Gain Compensation (TGC) operation. The evaluation
board allows the user to measure the I&Q outputs for each
of the eight Doppler Demodulator channels.
In addition to performing data capture and FFTs, the
WaveVision5™ software also provides the user with
parametric controls such as amplifier gains, TGC rate, and
selectable Doppler phase rotation angles.
NOTE: National Semiconductor also features a separate
reference design board for the LM96511 Ultrasound
Receive AFE, which demonstrates the end-to-end signal
path performance in an ultrasound application. Please
contact your local NSC Field Applications Engineer for a
live demonstration.
LM96511 Evaluation Board
110V-240V AC to +6V DC Power Adapter
CD ROM containing the WaveVision5™ software
installation package, WaveVision5™ documentation,
the LM96511 datasheet, LM96511 Evaluation board
Bill of Materials, and schematic.
LM96511 Evaluation Board User’s Guide
1.2 References
LM96511 Datasheet
WaveVision5™ Software User Guide
WaveVision5™ Data Capture Board User Guide
2.0 BOARD ASSEMBLY & ORIENTATION
The LM96511 Evaluation Board is shipped pre-assembled
for quick turn-key evaluation. Refer to the Bill of Materials
for a description of the components.
Please refer to the Board Schematic along with Figure 1
for board orientation and major component locations.
USB
Cable
+12V
+6V
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© 2010 National Semiconductor Corp.
Rev. 1.0
pg 3
LMH96511 Evaluation Board user’s Guide
1.0 GENERAL DESCRIPTION
LMH96511 Evaluation Board user’s Guide
+6V DC Power
Jack & Switch
Power
Regs
AFE
Inputs
CH 0-7
I&Q Doppler Outputs
CH 0-7
DVGA
RESET
Output
Æ
LM96511 AFE
DVGA
RESET
Input
Doppler
Clock
Inputs
To WV5
Capture
and
Control
Board
Æ
Figure 1. LM96511 Evaluation Board Orientation
Component Description
+6V DC Power jack
Power switch
On-board power regulators
AFE Inputs (Channels 0–7)
DVGA RESET Output
DVGA RESET Input
CW Doppler Demodulator
LO / Differential Clock Inputs
CW Doppler Demodulator
I&Q Outputs Channels (0–7)
High Speed Mating Port with
WV5 Board
Control Path Mating Port
with WV5 Board
Component Designator
J59
SW1
U17, U18, U20, U21, U22, U37, U39
J1, J7, J13, J19, J25, J31, J37, J43
J77
J52
J54, J69
Notes
For B-Mode TGC gated data acquisition
Local Oscillator differential clock input
J4, J5, J10, J11, J16, J17, J22, J23,
J28, J29, J34, J35, J40, J41, J46, J47
J66
J67
Table 1. Key Board Input and Output Connectors
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© 2010 National Semiconductor Corp.
Rev. 1.0
pg 4
The following are step by step instructions for starting up
the evaluation kit for the first time. These steps should be
performed in the exact sequence presented below.
3.1 WaveVision5™ Software Installation
The WaveVision5™ software is necessary for operating
the evaluation board. The installation package is included
in the CD-ROM folder:
D:\WV5 Installation Package\
1. Double-click on the file WV5Setup5.0.5.169.exe
2. A “Release Notes” RTF file will pop up at the
conclusion of the installation – close this file.
3. COPY the file,
ultrasound_patch_100614aa.exe, FROM the
folder D:\WV5 Installation Package Æ TO
the newly created folder C:\Program
Files\NationalSemiconductor\WaveVision5
\.
4. After the file ultrasound_patch_100614aa.exe
is placed in this folder, double-click on it from inside
that folder to execute the patch.
5. COPY the file,
wv5_xc4vlx25_sp1250mi02_int.reg.xml,
FROM the folder D:\WV5 Installation
Package Æ TO the folder C:\Program
Files\NationalSemiconductor\WaveVision5
\firmware\.
6. Software installation is now complete.
7. Please do not update this WaveVision5™ software
after installation and ignore any update messages!
The board is shipped with the jumpers configured in the
recommended default positions listed below. The jumpers
should always remain in these configurations unless
otherwise stated in the Functional Description Section 3.3.
Description
Optional manual override for
Amplifier logic control signals
Power source selection
between on-board regulators
and external bench power
supplies.
Power on-board 50MHz osc.
1. Inspect the board to verify that all of the jumpers
listed in Table 2 are configured in their default
positions.
2. Connect the WaveVision5™ board to the Evaluation
board at its mating connectors J66 and J67.
3. Plug in the +12V power wall plug into the WV5 board
at its power jack J2 and turn ON the its power switch
SW1.
4. Plug in the USB Cable to the WV5 board connector
J4.
NOTE: ALWAYS Power up the WV5
Board FIRST before making physical
USB connection with the PC to ensure
proper initialization of the FPGA!
5. USB DRIVER INSTALLATION: Upon plugging in the
USB cable, MS Windows should recognize the WV5
board as new hardware. Follow the steps in the New
Hardware Wizard to install the USB driver. Be sure to
click “Continue Anyway” at the final prompt.
6. Plug in the +6V power wall plug into the Evaluation
board at its power jack J59 and turn ON its power
switch SW1.
7. Launch the WaveVision5™ software.
When launching the WaveVision5™
software on a PC for the very first time,
CLICK on NO for automatic updating!
8. An FPGA image will load while the
WaveVision5™software initializes.
3.2 Default Jumper Settings
Jumper
JP9-JP13,
JP15-JP17
JP18
JP23
JP24
JP25
JP26
JP29
JP31
J63
JP30
3.3 Powering Up and Connecting the
Evaluation & WaveVision5™ Boards
Default
OPEN
DOWN (1-2)
DOWN (1-2)
DOWN (2-3)
DOWN (1-2)
DOWN (2-3)
DOWN (1-2)
DOWN (1-2)
ALL CLOSED
CLOSED
9. In the WaveVision5™ software window, hover the
rd
mouse pointer over the 3 vertical tab, “Registers”,
on the far right-hand side, and then click on the 3rd
horizontal tab, “Default”.
10. Now, the boards and software are ready for B-Mode
and CW-Mode signal path tests.
Always perform steps 1-9 for proper
start-up.
To Power Down, the steps should be
performed in the exact reverse order:
1. Turn OFF the Evaluation board
2. Turn OFF the WV5 board
3. Disconnect the USB cable
Table 2. Default Jumper Settings
www.national.com
© 2010 National Semiconductor Corp.
Rev. 1.0
pg 5
LMH96511 Evaluation Board user’s Guide
3.0 QUICK START-UP INSTRUCTIONS
LMH96511 Evaluation Board user’s Guide
www.national.com
© 2010 National Semiconductor Corp.
Rev. 1.0
pg 6
1. Connect a clean signal (e.g. from a 50Ω test source)
to one of the AFE input channel SMA jacks (see
Table 1).
2. Adjust the input signal amplitude to a level (e.g.,
10mVPP) suitable for applying larger gains to.
3. In the WaveVision5™ software window, hover the
rd
mouse pointer over the 3 vertical tab, “Registers”,
on the far right-hand side, and then hover over the
rd
3 vertical tab, “DVGA”, on the left-hand side of the
Registers menu, and click and UNCHECK the
“Periodic Gated Captures” box. See Section 4.5
for further details regarding Periodic Gated Captures.
4. Initiate a data acquisition in “continuous mode” with
“averaging” by clicking on the green icon first,
followed by the white icon, and then the “A” icon
shown below to display the data waveform in the
Time Domain.
To display the FFT, click on the Frequency Domain
icon.
3.5 CW-Mode Signal Path Test
1. Connect a clean 50% duty cycle differential clock
signal to the Local Oscillator (LO) / CW Clock Inputs
at SMA Jacks J54 and J69 (see Table 1).
The LO frequency signal should be 16 x the RF
frequency (e.g., 16 x 5.0 = 80.0MHz). Its common
mode level is typically 1.2V with a 400mVPP
differential swing from a 100Ω differential source.
See the board schematic and the CW Doppler
Section in the LM96511 Datasheet for further details.
2. Connect a signal (e.g. from a 50Ω test source) to one
of the AFE input channel SMA jacks (see Table 1).
This input signal frequency should be the RF
frequency plus a user defined offset (e.g., 5.0 + 0.1 =
5.1MHz). The signal amplitude should be adjusted to
suit the input range of the LM96511 (< 500mVPP).
See the CW Doppler Section and Electrical
Specifications in the LM96511 Datasheet for further
details.
3. In the WaveVision5™ software window, hover the
st
mouse pointer over the 1 vertical tab, “Signal
Source”, on the far right-hand side and then access
the pull-down menu to select “WV5, SP1250MI02,
Doppler”.
Refer to the WaveVision5™ software user guide for
further details regarding FFTs, etc.
5. The following DVGA parameters can be adjusted in
the DVGA menu tab:
Refer to the LM96511 Datasheet for more details
regarding these DVGA controls.
www.national.com
© 2010 National Semiconductor Corp.
Rev. 1.0
pg 7
LMH96511 Evaluation Board user’s Guide
3.4 B-Mode Signal Path Test
4.2 ADC Input Clock
The LM96511’s Continuous Time ΣΔ ADC is clocked at
40-50MHz, with a low jitter, low voltage differential clock.
The LM96511 Evaluation board includes a transformer
(U41), which generates a differential clock from a singleended source. The board offers users with the option to
either drive this single-ended source with an external clock
(at J68) or with a 50MHz on-board crystal oscillator (I1).
The board is shipped with the default configuration, in
which the on-board oscillator is selected as the clock
source. See sheet 14 of the board schematic for details.
Use the pull down menus to select phase rotation
angles for each channel individually or click on the
“Propagate” button to duplicate the angle for all
channels. Click on the “Load Phase Shifts” button.
5. The Doppler I&Q outputs can be measured at the
output SMA jacks (see Table 1).
See the CW Doppler Section in the LM96511
Datasheet for further information.
4.3 CW Doppler Demodulator I&Q Output
(Channels 0 – 7)
The LM96511 Doppler Demodulator’s I&Q current outputs
are driven by the LMP7732 I-V conversion amplifier out to
standard SMA connectors for convenient lab
measurements and test points for waveform monitoring.
4.0 FUNCTIONAL DESCRIPTIONS
4.1 Analog Input (Channels 0 – 7)
The single-ended analog inputs are supplied via standard
SMA connectors. A clean 50Ω test signal source should
be used to ensure that the LM96511’s dynamic
performance can be properly evaluated.
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© 2010 National Semiconductor Corp.
Rev. 1.0
pg 8
LMH96511 Evaluation Board user’s Guide
4. In the WaveVision5™ software window, hover the
mouse pointer over the 3rd vertical tab, “Registers”,
on the far right-hand side, and then hover over the 3rd
vertical tab, “Doppler Phase Shift”, on the left hand
side of the Registers menu to display the CW Doppler
– Phase Angle Rotation Selection controls.
The LM96511 DVGA controls (Gain CLOCK, Gain
RESET, and Gain Ramp DIRECTION) on the Evaluation
board are typically controlled via the WaveVision5™
software. However, the board offers provisions for a user
to externally control these signals at SMA connectors, J50,
J51, and J52.
Now, after the LM96511 DVGA has time gain
compensated the input signal, shown below is the
captured data of the LM96511 output.
Refer to the LM96511 Datasheet for more details
regarding these DVGA controls.
4.5 TGC and Periodic Gated Captures
Checking the “Periodic Gated Captures” box in the DVGA
Registers tab allows the user to gate the WaveVision5™
data capture with the DVGA RESET period. Thus each
captured ADC data window will be synchronous with each
DVGA Gain Ramp Period (i.e., Time Gain Compensation
(TGC) Period).
Furthermore, the period of a TGC test signal (e.g., periodic
exponentially decaying sine wave) may be externally
synchronized to the DVGA RESET period. The LM96511
Evaluation board provides SMA connectors to achieve this
as shown below.
4.6 Global Logic Controls
All logic controls for the LM96511 are typically set by the
WaveVision5™ software. The board also offers provisions
for a user to manually override these controls with jumpers
and externally with a SMA connector.
JP9
JP10
JP11
JP12
JP13
JP15
JP16
JP17
J53
Logic Control Signals
DVGA Attenuation Range MSB
DVGA Attenuation Range LSB
Post Amplifier Gain Select
Low Noise Amplifier Shutdown
DVGA Shutdown
Amplifier SPI Reset
ADC Reset
ADC Sleep
Doppler Mode Reset
Table 3. Manual Logic Controls
Nevertheless, it is recommended to primarily use the
WaveVision5™ software to control these signals as shown
below.
Shown below is WaveVision5™ captured data of an
“un-time gain compensated” output from the LM96511.
The Input is a TGC test signal with its period synchronized
to the DVGA RESET signal from the WaveVision5™
board.
DVGA Reset Period
Refer to the LM96511 Datasheet for more details
regarding these control signals.
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© 2010 National Semiconductor Corp.
Rev. 1.0
pg 9
LMH96511 Evaluation Board user’s Guide
4.4 DVGA Controls
LMH96511 Evaluation Board user’s Guide
4.7 Power
The LM96511 Evaluation board is typically powered with a
single AC to +6V DC Power Adapter. This +6V then
sources multiple on-board voltage regulators that supply
power to all of the devices on the board.
Alternatively, the required supply voltages can be sourced
from external lab DC power supplies that are clean and
well-regulated within ± 5% variation of the voltage range.
This option is not recommended. The board is shipped
with power source selection jumpers (see Table 2) in the
default configuration which powers the board with the +6V
DC Power Adapter.
See Table 2 and the board schematic for further details.
4.8 WaveVision5™ Mating Connectors
J66 is a high speed connection point that carries the
LM96511 ΣΔ ADC’s serial LVDS data and clock outputs as
well as the LM96511’s SPI lines, and DVGA control
signals.
J67 is the control signal path connection point that carries
the LM96511’s control signals listed in Table 3.
4.9 Test Points
Test points and ground points are provided to measure the
input and output signals using 10MΩ oscilloscope probes
with ~10pF load capacitance.
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© 2010 National Semiconductor Corp.
Rev. 1.0
pg 10
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LMH96511 Evaluation Board user’s Guide
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