ADC08D1020DEV/NOPB National Semiconductor, ADC08D1020DEV/NOPB Datasheet - Page 6

• Manufacturer Part Number: ADC08D1020DEV/NOPB
• Description: BOARD DEV FOR ADC08D1020
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of ADC08D1020DEV/NOPB

• Number Of Adc's: 2
• Number Of Bits: 8
• Sampling Rate (per Second): 1G
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Input Range: 870 mVpp
• Power (typ) @ Conditions: 1.6W @ 1GSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: ADC08D1020
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ADC08D1020DEV

NOTE: Install the WaveVision4 software
before connecting this product to the PC.
For quick start operation:
The ADC08(D)XXXXDEV Development Board
schematic is included as an additional document.
5.0 Functional Description
1. Install the WaveVision4 software. See
2. Connect the 12V DC power source
3. Connect a stable sine wave source
4. Connect the USB cable (included) from
5. Push the Power Switch to the ON
6. Start the WaveVision4 Software.
7. Once loaded, the “Firmware Download”
8. Upon Firmware Download completion,
9. Set the signal source for the analog input
10. Reduce the input level until the OVR LED
11. From the WaveVision4 pull-down menu
12. For the FFT analysis of this sample, click
Appendix B – Installing WaveVision.
(included with the development board) to
the rear Power Connector labeled (8V-
12V DC).
capable of supplying the desired input
frequencies at up to 8 dBm. Connect this
signal to the front panel SMA connector
labeled “I CH.” through a band-pass
filter. The exact level required from the
generator will depend upon the insertion
loss of the filter used.
the USB port to the PC. If this is the first
time the board has been connected,
Windows may install the drivers for this
product at this time.
position on the rear panel and check that
the Green LED between the switch and
the power connector illuminates.
Progress bar should be displayed. See
Appendix B for more information.
the control panel for the board should
automatically be displayed on the PC and
the CLK LED on the front panel should
be flashing.
to 8 dBm at the desired frequency.
Observe the Out-of-Range LED labeled
OVR on the front panel. If this LED is not
illuminated, increase the input signal
source until it is.
just turns off. Now, the input signal level
should be maximized, without over-
ranging.
select Acquire and then Samples. The
system will then capture the input signal
waveform and display the results in the
time domain.
the FFT Tab.
5.1 Input circuitry
The input signal(s) to be digitized should be
applied to the front panel SMA connectors
labeled “I CH.” and “Q CH.” For single input
devices such as the ADC08500, ADC081000 and
ADC0815000, apply the signal only to the “I CH.”
These 50 Ohm inputs are intended to accept low-
noise sine wave signals. To accurately evaluate
the dynamic performance of this converter, the
analog input signal(s) must be filtered by a high-
quality bandpass filter with at least 10-bit
equivalent noise and distortion characteristics.
This evaluation board is designed for operation
with two single-ended analog inputs, which are
converted to differential signals on-board.
Signal transformers T2 and T3 are connected as
baluns,
differential conversion. The differential PCB
traces to the ADC analog input pins have a
characteristic differential impedance of 100
Ohms.
No
oscilloscope, should be connected anywhere in
the signal path while gathering data because it
will add noise to the signal.
The TRIG_IN input is buffered and passed to the
FPGA. The intent of this input is to allow users to
expand the existing capabilities of the current
system by providing for external triggering of a
data capture.
functionality in the provided FPGA firmware.
5.2 ADC reference
The ADC08(D)XXXX has an internal reference
which can not be adjusted. However, the Full-
Scale (differential) Range may be adjusted with
the Software Control Panel. Refer to Section 6.0
for more information
5.3 ADC clock
The ADC clock, which is generated on-board, is
a fixed frequency. An external clock signal may
alternatively be supplied to the ADC through the
SMA Connector labeled “CLOCK” on the front
panel. The balun-transformer (T1) converts the
single-ended clock source to a differential signal
to drive the ADC clock pins.
If using an external clock source, it is very
important that it is as low jitter as possible.
Otherwise, the SNR of the ADC08(D)XXXX will
be compromised.
When alternating between an externally applied
clock to the on-board clock, the clock input
should never be left floating. The user is advised
other
and
test
provide
The TRIG_IN input has no
equipment,
the
single-ended
such
as
an
to