Supertex inc.
MD3872DB1
MD3872 Front-End Ultrasound Receiver Demoboard
Introduction
The MD3872 is a low power and low noise eight-channel
front-end receiver for medical ultrasound imaging. Its excellent low power dynamic performance is especially suitable
for portable ultrasound applications. Each channel’s circuit is
composed of a 14dB/18dB low noise pre-amplifier (LNA), a
voltage-controlled attenuator (VCA or TGC), a programmable gain amplifier (PGA), an anti-aliasing filter (AAF) and an
analog-to-digital (ADC) converter. The gain and gain range
of the VGA can be digitally configured separately. The gain
of the PGA can be set to one of four discrete values: 23.5dB,
29dB, 34.5dB or 40dB. The VCA can be continuously varied
by a control voltage from -47dB to a maximum of 0dB.
In CW mode, an integrated trans-conductance amplifier is
driven by the LNA to generate differential output current.
The resulting signal currents of each channel then connect
to an 8×8 differential cross-point switch which can be programmed through the SPI. The 12-bit ADC is based on a
pipeline structure to provide high static linearity. The data,
clock, and frame alignment signal outputs are serial LVDS in
binary format for each channel.
General Description
The MD3872DB1 provides a very useful platform to evaluate
this low power and low noise 12-bit resolution ADC ultrasound
front-end receiver. Simply connect a 5V power supply to the
board and a USB cable to your computer.
The on-board MD3872 and T/R switch ICs, TGC, DAC,
FPGA, de-serialized LVDS, clock generator, DDR2 data
memory, isolated USB interface, JTAG SPI connector,
RS232 serial interface and low noise DC/DC power supplies
make a stand alone, desktop 8-channel ultrasound receiver
data acquisition evaluation system.
The MD3872DB1 package includes the demoboard
power supply cable, USB cable, software driver and PC
user interface software files. All software files including
the EEPROM file, FPGA configuration file and PC user
interface software files are web downloadable for updating
if necessary.
This datasheet describes the detail of the built-in hardware
features and PC interface software installation and step by
step operation of the board..
Block Diagram
Doc.# DSDB-MD3872DB1
A051713
Supertex inc.
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MD3872DB1
MD3872DB1 Hardware Design
Users should leave the EBC pin disconnected. It is for
manufacturer testing only. The AVDD pins are connected to
a low noise +1.8V isolated power supply. The AVDD supply
pins need to be thoroughly decoupled to make sure that LNA
is working a low EMI/RFI conditions.
The eight channels of MD3872 LNA inputs are connected
to eight input signal SMA connectors via a transmit/receive
switch circuit, TRSW, as shown below. The T/R switches
used here are two Supertex MD0105s, 4-channel, ±130V,
15Ω devices. They are two-terminal devices. A pair of backto-back diodes, D24, are present to protect the LNA input
circuit from high-voltage transmission pulses and voltage
spikes from the transducer and long cable lines. The T/R
switch provides a low on-resistance (normal ON state) at
receiving time and a high impedance (OFF state) when high
voltage pulses are present. These input circuits enable the
user to directly evaluate their echo signal processing using
the MD3872 front-end receiver in their ultrasound system.
All digital outputs, especially the eight channels of LVDS,
working at 480bit/s data speed consumes a large amount of
power. One can slightly increase the DVDD voltage by +1.90
to 1.95V for better LVDS output waveforms at 300MHz DCLK
when 50MSPS maximum sampling rate becomes necessary.
The DVDD power rail is supplied by a separate LDO U11.
These AVDD and DVDD regulators feedback sense pins are
directly connected to the ferrite bead down stream and the
corresponding power supply pins separately. This method
will provide accurate voltage and lower noise.
The trans impedance LNA gain setting of resistor Rf1 (R125)
is 249Ω when LNA SW is OFF. Because the Rf2 (R124)
is 590Ω, that means when LNA SW is ON, the effective
resistance is Rf1//Rf2 = 175Ω. See the MD3872 datasheet
for the LNA input impedance calculation and LNA SW SPI
control bits.
The MD3872 +3.3V CVDD it connected to a CW cross point
switch circuit. Foe those applications that do not need CW
signals, one can simply connect the CVDD to 1.8 as well.
PCB Board Design
The MD3872 sampling clock input signals are 40 or 50MHz
from two low-jitter LVDS crystal oscillators, via a shared
differential-clock bus, which is terminated with a 100Ω
differential load resistor. The bus lines must be comprised
of two closely coupled, length-matched, 50Ω impedances to
ground. The 100Ω resistor load must be placed very close to
the MD3872 CLK± pins.
In order to simplify testing of the CW cross-point switch
current source outputs, one channel CW1± pins have been
connected to a tightly coupled, center-taped, wind-band RF
transformer T2 and to an SMA connector J21.
There is an SPI serially interfaced 12-bit precision DAC on
board for quick evaluation of the TGC function of MD3872.
It can generate 0 to 1.8V with 0.44mV step resolution. R45
and R34 form a simple DAC output voltage-divider file that
scales the TGC signal. The Gain-Scaling Control pin GSC
has been pulled up to 1.8V AVDD by R30, which means that
GSC is set to 50dB/V TGC gain on this demoboard. One
can easily install a proper value on the resistor R36 (open as
default) to reset the TGC gain. Note that the VGSC minimum
voltage is 1.44V, which sets the TGC gain to about 66dB/V.
Besides the clock input pins, all the other pairs of LVDS
output pins to FPGA de-serialized input pairs also need to
be the same type of transmission lines that are designed
on the PCB. The termination resistors, however, are not
needed due to the built-in LVDS termination feature of the
Spartan-6 FPGA circuit. But length-matching of the LVDS
lines is very critical to the ADC output data pairs OUTn± vs.
DCLK± and FCLK± pairs. Precision trace line impedancecontrol by a PCB fabrication house is highly recommended,
although MD3872 has built-in programmable LVDS output
skew alignment features.
Although there is a built-in ADC reference voltage source
in MD3872, for evaluating the external referencing option,
there is an additional on-board precision 1.024V reference
device, U9, which can work with the jumper J24 to select the
internal or external reference. When selecting the external
reference, the EXT jumper should be Hi.
The most important thing about the PCB design for the
MD3872 receiver front-end IC, besides the line impedance
control, is the ground plane selection and ground integrity.
Supertex recommends that if MD3872 is on the top layer
of the PCB stack, then the ground must be the second
layer. The center-bottom of the IC’s thermal pad should be
well connected to the ground plane electrically as well as
thermally. The vias on the thermal pads should use about
a 0.3mm diameter drill for the through hole matrices with
1.0mm pitch. However, do not let the pad electrically connect to the other layers of the PCB stack, even if they are
named as GND , but thermally it can connect to as many
The MD3872 reference pins’ top and bottom voltages of
the ADC are not only for testing the voltages, but also for
bypassing capacitors differentially (C135 & C146) as well
as common-mode to ground (C153 & C154). When the IC
is working at 40 or 50MSPS speeds, all eight channels of
the ADl need a very large peak current into or out of the
reference voltage pins. It is important to keep the ADC
reference filtered as the current ripples especially in the
differential mode.
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MD3872DB1
layers as possible to lower the thermal resistance of heat
sinking. The GND vias of all the decoupling capacitors of the
MD3872’s power supply pin should also connect to the second layer with traces that are as short as possible, or even
without a trace. The GND plane should not have a split, longslot or large-hole. Make sure the top signal’s return currents
to ground freely select the best path, just like the top signal
path’s shadow-image is projected on to the GND plane for
minimizing its magnetic loop and therefore minimizing ERI/
RFI. PCB layout designers must make sure that no return
current paths are close to, crossing, or overlapping each
other on the ground plane. The power traces are normally
selected on the third layer for the power trace impedance
and de-coupling.
After correct configuration of the FPGA, a user interface window comes up, as shown in Fig. 2:
USB Driver Installation
Fig. 2
The MD3872DB1 demoboard uses Spartan-6 FPGA as the
MD3782 LVDS de-serializer and data acquisition controller
interfaced to DDR memory and the USB controller. The USB
port on the CY7C68913A via is a 20Mbit/s USB isolator connected to a PC USB port. To install the USB driver, plug the
USB cable into the PC, turn on the demoboard power supply, then install the driver by clicking the new USB device
and selecting the SupertexWinUsb.inf file which is provided
in the Supertex subdirectory of the demo software. After
installing the driver, you will see a new item under Control
Panel / Device Manager called “SupertexUsb / USB SAMPLE”. Click the “Supertex.exe” file to start running the demo
software.
To acquire one of the 8-channels of MD3872 data, select
the “File/Acquire Data”. Select the desired “Sample Period”,
“Sample Point” and “Sample Channel” from the three options provided, then click the “Start button”.
Demoboard Software
Running the Supertex.exe file will automatically download the
FPGA “SuperTexFPGA.bin” file into the Spartan-6 FPGA first.
This procedure takes about 20 seconds. See figure below:
Fig. 3
A new time domain waveform window will come up, If the
input is a Sine wave, then the screen looks like this:
Fig. 1
Before running “SuperTex.exe”, some Windows XP or 7 users may need to install the “.net runtime library”. It can be
found in the “Driver” subdirectory in the “SuperTex” folder as
“dotNetfx.exe”.
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MD3872DB1
Controlling the TGC DAC
To zoom in/out on the time or amplitude axis, use (Ctrl + /
-) or (Ctrl ] / [). Or use the “Horizontal Zoom” and “Vertical
Zoom” pull-down menus.
To control the TGC voltage which outputs from the SPI serial
interfaced DAC, select “File / TGC DAC Write” at the top level
screen of the demo software window,then use the default
Address Input value 3 and type any number within 000 to
FFF in Hex. That corresponds to abut 0 to 1.8V in voltage
at the TGC pin of MD3872, and corresponds to -47dB to
0dB for the TGC attenuations. The TGC linear-in-Log control
curve from 0 to 1.7V is shown below.
The frequency domain and harmonic analysis are available
by clicking the “Fourier Transform” Tab above the waveform
window. If an RF frequency peak top is not located at 0 dB
or where you want it be as the reference point, you could
simply use (Ctrl > / <) to offset the FFT results.
To save a data file of an acquisition resolution use “File/
Save As (*.spd) file for later review, or “Save to CSV” file for
Excel data base or MATLAB or MathCAD evaluation.
Fig. 5
Fig. 7
Configuring the MD3872 SIP Register
Using the demoboard software, you can easily configure the
MD3872 SPI register, by selecting the “MD3872 Cfg” menu.
The configuration window looks like this:
0
TGC Attenuation (dB)
Maximum Slope
Minimum Slope
-47
0
TGC Voltage (V)
1.7
Fig. 6
Fig. 8
On the left side, a table of MD3872 SPI registers is shown in
binary. The ADDR column is in Hex 0 to F. The register data
field help table is on the right side. The help contents will progressively change as the selected ADDR row is changing.
After you enter the wanted number to the page, select the
“Save / to Hardware” or “Save / to (*.md) file for later recall.
That means setting the TGC DAC to more than 0xF1C will
make all the channels have attenuation of about 0dB.
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MD3872DB1
Low Power MD3872 Runs Cool
The low power dissipation feature of the MD3872 is superior to its competition. To the right is a IR thermal image of
the chip on the demoboard. It shows about 52°C at the surface when 8-channels are running at 40MHz, with AVDD =
+1.80V, DVDD = +1.97V CVDD = +3.3V. The emissivity of
the package is about 0.95. This demoboard PCB stack is
8-layers and uses 0.5oz copper thickness
Demoboard Circuit Schematic
2
AVDD1V8
AVDD1V8
C63 C64 C65 C66
1.0 1n 1.0 1n
2
J13
COM
TRSW4
U21-1
R196
0
R197
2K
1
2
19
NCA NCB
A
B
GND
XDRC
18
17
COM
TRSW8
XDRC
MD0105K6
J15
COM
U21-2
R181
0
R182
2K
3
4
20
NCA NCB
A
B
GND
TRSW5
16
15
XDRC
COM
TRSW6
MD0105K6
J17
XDRC
COM
U21-3
R186
0
R187
2K
5
6
21
NCA NCB
A
B
GND
SMA
MD_TGC
U21-4
R191
0
R192
2K
XDRC
AVDD1V8
MD0105K6
J19
TRSW7
14
13
7
8
22
NCA NCB
A
B
GND
R34
750
12
11
R31
50
COM
50
SMA
1
2
5
3
6
6
VDD
3
61
60
MD_OUTP1
MD_OUTN1
EN
2
NC
PASW
PALNA+
LNA-
86
85
84
82
SW3
PA3IN3+
IN3-
OUT3+
OUT3-
53
52
MD_OUTP2
MD_OUTN2
OSC_FRE1
PASW
PALNA+
LNA-
93
92
91
89
SW4
PA4IN4+
IN4-
OUT4+
OUT4-
51
50
MD_OUTP3
MD_OUTN3
PASW
PALNA+
LNA-
4
5
6
8
SW5
PA5IN5+
IN5-
OUT5+
OUT5-
45
44
MD_OUTP4
MD_OUTN4
PASW
PALNA+
LNA-
11
12
13
15
SW6
PA6IN6+
IN6-
PASW
PALNA+
LNA-
18
19
20
22
PASW
PALNA+
LNA-
U7
MD3872
OUT6+
OUT6-
43
42
MD_OUTP5
MD_OUTN5
SW7
PA7IN7+
IN7-
OUT7+
OUT7-
41
40
MD_OUTP6
MD_OUTN6
25
26
27
29
SW8
PA8IN8+
IN8-
OUT8+
OUT8-
39
38
MD_OUTP7
MD_OUTN7
126
125
GSC
TGC
100
101
102
103
104
105
106
107
116
117
118
119
120
121
122
123
CW1+
CW1CW2+
CW2CW3+
CW3CW4+
CW4CW5+
CW5CW6+
CW6CW7+
CW7CW8+
CW8-
SDI
SDO
SCLK
CSB
64
34
63
65
FLEX
EXT
EBC
98
110
128
NC
NC
NC
NC
ADC CLK 40MHz
6
X2
VDD
108
115
CVDD
CVDD
55
54
1
OUT2+
OUT2-
C132
T2
MCL_T1-6T
4
PDWN
STBY
SW2
PA2IN2+
IN2-
CVDD3V3
CWD1
114
33
36
62
99
37
58
79
78
77
75
TP20
J21
AVDD3
AVDD4
AVDD5
AVDD6
AVDD7
DVDD
DVDD
PASW
PALNA+
LNA-
C131
0.01
0.01
2
9
16
23
95
88
81
74
MD_OUTP0
MD_OUTN0
INF R36
MD0105K6
AVDD2
AVDD2
AVDD2
AVDD2
AVDD2
AVDD2
AVDD2
AVDD2
57
56
R30
TP19
VDD3V3
C111
10n
FOX-LC735R-40
5
LVDS_CLKN
OUT1
4
LVDS_CLKP
3
OUT2
CVDD3V3
C157 C158
1.0
1n
R44
1K
External VREF
U9
LM4140
VIN
XDRC
LVDS_CLKP
R47
0
3
EN
5
NC
VREF
GND
GND
GND
GND
TRSW3
MD0105K6
LVDS_CLKN
4
6
VREF1V024
C161
1.0
1
4
7
8
COM
5
OUT1
66
59
35
67
MD_SDI
MD_SDO
MD_SCLK
MD_CSB
MD_EXT
R39
INF
CVDD3V3
C155 C156
1.0 1n
MD_FLEX
TGC DAC
DVDD1V8
R37
1K
4
12
11
OUT2
1
2
3
J24
HEAD3
R45
249
6
MD_TGC
DAC Output 0 to 2.5V
VOUT
U8
LTC2630-LM12-LCZB
SDI
3
TGC_SDI
SCK
2
TGC_SCK
CS-LD
1
TGC_CS_LD
5
NCA NCB
B
A
GND
MD_FCLKP
MD_FCLKN
RBIAS
R177
2K
7
8
22
MD_DCLKP
MD_DCLKN
47
46
OUT1+
OUT1-
REF+
0
FOX-LC735R-30
CW1+
C144
1.0
0.1 0.1 0.1 0.1 0.1
0.1 0.1 0.1 0.1
CW1C159
R43
INF
C139C140C141C142C143
C149C150C151C152
0.1
C135
0.1
109
XDRC
U20-4
R176
49
48
FCLK+
FCLK-
SW1
PA1IN1+
IN1-
113
TRSW2
DCLK+
DCLK-
72
71
70
68
REF-
MD0105K6
NC
PASW
PALNA+
LNA-
VREF
COM
112
XDRC
3
10
17
24
94
87
80
73
124
TRSW1
CLK+
CLK-
111
NCA NCB
A
B
GND
32
31
GND
GND
GND
GND
GND
R172
2K
14
13
1
30
129
96
97
0
5
6
21
EN
2
OSC_FRE2
AVDD1
AVDD1
AVDD1
AVDD1
AVDD1
AVDD1
AVDD1
AVDD1
LVDS_CLKP
LVDS_CLKN
1
MD_STBY
AVDD0
100 R28
MD0105K6
ADC CLK 50MHz
X1
MD_PDWN
C127 C128
1.0 1n
16
15
U20-3
R171
C124
1n
CM0
CM1
CM2
CM3
CM4
CM5
CM6
CM7
CM8
R167
2K
C123
1.0
127
69
76
83
90
7
14
21
28
0
NCA NCB
A
B
GND
+
VDD3V3
GND
MD0105K6
3
4
20
C116 C117 C118
1n
1.0
1n
C125 C126
1.0 1n
FB15
U20-2
R166
C26
10n
470uF 6.3V
C119
GND
AVDD1V8
18
17
2
NCA NCB
A
B
GND
1
R127
2K
1
2
19
C120
1.0
AVDD3
U20-1
R126
0
J11
FB12
VCC
+
1
C94
C95 C96 C97 C98 C99 C100C101C102C103C104C105C106C107C108C109C110
1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n
2
2
470uF 6.3V
J7
CVDD3V3
1
Rx Inputs
J6
C71 C72
1.0 1n
C69 C70
1.0 1n
AVDD1
FB10
GND
AVDD1V8
J5
1
1
+
C46
FB3
C28 C29
1.0 1n
C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62
1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n 1.0 1n
DVDD1
2
1
2
FB4
470uF 6.3V
DVDD1V8
FB1
AVDD2
C145
C146
R41
4.7
49.9K
0.1 C153
C154
0.1
0.1
VREF1V024
R179
590
TRSW
PASW
R180
249
PAC364
C365
18nF
LNA+
2
1
XDRC
R183 D35
BAS40-04
2K
0.01
C367
C366
22pF
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Supertex inc.
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MD3872DB1
MD3872DB1 Waveforms @ 40MHz Sampling Frequency
Fig. 10 Waveform screen of Ch-1, 1.0MHz Sine wave by HP33120A & Q56T-1M filter
Fig. 11 Fourier Transform screen of the above 1.0MHz Sine wave
Fig. 12 Harmonic Analysis screen of the above 1.0MHz Sin wave
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MD3872DB1
MD3872DB1 Waveforms @ 40MHz Sampling Frequency
Fig. 13 Waveform screen of Ch-1, 5.0MHz Sine wave by HP33120A & Q56T-5M filter
Fig. 14 Fourier Transform screen of the above 5.0MHz Sine wave
Fig. 15 Harmonic Analysis screen of the above 5.0MHz Sine wave
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MD3872DB1
MD3872DB1 Waveforms @ 40MHz Sampling Frequency
Fig. 16 Waveform screen of Ch-1, 7.0MHz Sine wave by HP33120A & LE1182T-7M filter
Fig. 17 Fourier Transform screen of the above 7.0MHz Sine wave
Fig. 18 Harmonic Analysis screen of the above 7.0MHz Sine wave
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MD3872DB1
MD3872DB1 Waveforms @ 50MHz Sampling Frequency
Fig. 20 Fourier Transform screen of the above 5.0MHz Sine wave
Fig. 19 Waveform screen of Ch-1, 5.0MHz Sine wave by HP33120A & LE1182T-7M filter
Fig. 21 Harmonic Analysis screen of the above 5.0MHz Sine wave
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MD3872DB1
MD3872DB1 Waveforms @ 50MHz Sampling Frequency
Fig. 23 Fourier Transform screen of the above 7.0MHz Sine wave
Fig. 22 Waveform screen of Ch-1, 7.0MHz Sine wave by HP33120A & LE1182T-7M filter
Fig. 24 Harmonic Analysis screen of the above 7.0MHz Sine wave
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MD3872DB1
PCB Layout
PCB Board
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MD3872DB1
Board Connector and Test Pin Description
Power Supply Connector, Switch and Test Point Description
J22
+5V 2A
DC power supply (*see important safety notice below!)
SW2
Power SW
DC power supply On/Off switch
SW1
RESET
USB controller resetting switch
SW3
Test SW
FPGA test switch
TP48,49,50,
51,53,57,61
GND
Ground test points
D2, D4, D5
Test LEDs
USB controller test LED Indicators Red,Green,Yellow
D2
USB LED
PC USB V+ LED, Green
D16
+5V LED
+5V DC+ power supply LED, Green
D25, D26
Test LEDs
Test LED, Red Yellow indicators for pin C6 & B3 of FPGA (XC6S16-2FTG256C)
TP65
+5Vin
TP64
+5V
TP30
+3.3V
VDD for USB controller
TP39
+3.3V
VCC to FPGA bank 0,2,3
+5V DC +power supply test point after SW2
+5V DC +power supply test point before SW2
*Note:
It is important to make sure that J22 plug negative (the outer connection of the power plug) is grounded (0V)!
Power Supply Connector, Switch and Test Point Description (cont.)
TP42
+3.3V
VCCAUX and JTAG SPI J3-5
TP43
+1.2V
VCCINT +1.2V
TP24
+0.9V
VTT +0.9V
TP23
+3.3V
CVDD +3.3V for CW and DAC
TP21
>+1.8V
AVDD +1.8V LDO output before FB4 & FB10.
TP25
+1.8V
VCC +1.8V for FPGA bank 1 & DDR2
JTAG Connector Pin Number, Signal Name and Description
J3-1
TMS
TMS pin of FPGA SPI JTAG interface
J3-2
TDI
TDI pin of FPGA SPI JTAG interface
J3-3
TDO
TDO pin of FPGA SPI JTAG interface
J3-4
TCK
TCK pin of FPGA SPI JTAG interface
J3-5
+3.3V
+3.3V (output) pin of FPGA SPI JTAG interface
J3-6
GND
GND pin of FPGA SPI JTAG interface
Analog I/O Test Signal Connector Description
J5
CH1 SMA
Ultrasound Rx input connectors for MD3872 CH1, with MD0105 T/R switches.
J6
CH2 SMA
Ultrasound Rx input connectors for MD3872 CH2, with MD0105 T/R switches.
J7
CH3 SMA
Ultrasound Rx input connectors for MD3872 CH3, with MD0105 T/R switches.
J11
CH4 SMA
Ultrasound Rx input connectors for MD3872 CH4, with MD0105 T/R switches.
J13
CH5 SMA
Ultrasound Rx input connectors for MD3872 CH5, with MD0105 T/R switches.
J15
CH6 SMA
Ultrasound Rx input connectors for MD3872 CH6, with MD0105 T/R switches.
J17
CH7 SMA
Ultrasound Rx input connectors for MD3872 CH7, with MD0105 T/R switches.
J19
CH8 SMA
Ultrasound Rx input connectors for MD3872 CH8, with MD0105 T/R switches.
Doc.# DSDB-MD3872DB1
A051713
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Supertex inc.
www.supertex.com
MD3872DB1
Analog I/O Test Signal Connector Description (cont.)
J21
SMA
MD3872 CW cross-point switches output CW1+ and CW1- via 1:1 RF transformer.
TP19
TGC
MD3872 TGC pin, 0 to+1.8V(max) controlled by 12bit SPI DAC U8 on board.
TP20
GSC
MD3872 GSC pin, 50Ω pull up to AVDD +1.8V
J24
EXT
MD3872 EXT pin connection selecting jumper, default on pin2-3 (EXT=0)
USB and RS232 Interface to PC Computer
J1
USB
J2
RS232
Electrically Isolated 20Mbit/s full speed USB interface to computer
Serial interface of USB controller for debugging only
Demoboard Key Components List
Reference
U7
Description
Manufacturers Part No.
Manufacturer
MD3872 8Ch 50MHz ultrasound receiver front-end IC MD3872HF-G
Supertex Inc.
MD0105K6 4-ch ultrasound ±130V T/R switch
MD0105K6-G
Supertex Inc.
U1
IC MCU USB periph HI SPD 128-lead LQFP
CY7C68013A-128AXC
Cypress
U2
Spartan-6 FPGA
XC6SLX16-2FTG256C
Xilinx
U3
IC filter USB ESD protect SOT363
NUF2221W1T2G
On Semi
U4
IC TXRX 3.3V EIA/TIA-562 16-SOIC
LTC1386CS#PBF
Linear
U5
8-pin low profile IC socket .300
115-93-308-41-003000
Mill-Max
U8
IC DAC 12BIT 2.5V R-R SC70-6 (Mark, LCSB)
LTC2630ISC6-LZ12#TRMPBF Linear Tech
U9
IC ref prec volt micropwr 8-Lead SOIC
LM4140ACM-1.0/NOPB
National
LT1764AEQ-1.8#PBF
Linear Tech
U20,U21
U10,U11,U14 IC LDO LO noise 3A 1.8V 5-Lead D-PAK
U12
IC REG LDO 1.5A 3.3V SOT-223
ADP3339AKCZ-3.3-RL
ADI
U15
IC DDR2 SDRAM 1GBIT 3NS 84FBGA
EDE1116ACBG_8E_E
Supertex
U16
IC push-pull cntrlr sync 16-lead TSSOP
LT3439EFE#PBF
Linear Tech
U18,U19
IC DC/DC Umodule 6A 133-Lead LGA
LTM4606EV#PBF
Linear Tech
U36
IC REG LDO adj 1.1A 5-Lead D-PAK
LT3080EQ#PBF
Linear Tech
U37
IC USB isolator Full/Low 16-Lead SOIC
ADUM4160BRWZ
ADI
IC BUS transcvr 4BIT 16-lead TSSOP
SN74AVC4T245PWR
TI
U41,U42
U5
IC EEPROM 128KBIT 400KHz 8-Lead DIP, On Socket 24LC128-I/P
Microchip
T1
RF transformer 0.015 to 3.00MHz
T1-6T-KK81
Mini-Circuits
T3
DC/DC 1:1 switching power supply transformer
WE-750341004
Wűrth Electronics
X1
OSC 50 MHz 3.3V LVDS SMD
FXO-LC735R-50
FOX Electronics
X2
OSC 40 MHz 3.3V LVDS SMD
FXO-LC735R-40
FOX Electronics
X3
OSC 240 MHz 3.3V LVDS SMD
FXO-LC735R-240
FOX Electronics
Y1
Crystal 24.00 MHz 12PF SMD
ECS-240-12-28A-TR
ECS Inc.
Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives
an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability
to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and
specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com)
Supertex inc.
©2013 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited.
Doc.# DSDB-MD3872DB1
A051713
13
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com
Mouser Electronics
Authorized Distributor
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