ADC14C105EB/NOPB National Semiconductor, ADC14C105EB/NOPB Datasheet - Page 4

• Manufacturer Part Number: ADC14C105EB/NOPB
• Description: BOARD EVAL 14-BIT ADC14C105
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of ADC14C105EB/NOPB

• Number Of Adc's: 1
• Number Of Bits: 14
• Sampling Rate (per Second): 105M
• Data Interface: Parallel
• Inputs Per Adc: 1 Differential
• Input Range: 2 Vpp
• Power (typ) @ Conditions: 400mW @ 105MSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: ADC14C105
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ADC14C105EB

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 crystal 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 4.3 or later of the WaveVision™
software to properly test this board. You can download
the latest version from:
http://www.national.com/appinfo/adc/wv4.html
1.
2.
3.
4.
Apply power to the WaveVision™ board and connect
it to the computer using a USB cable.
WaveVision™ Board Manual for operation of that
board.
WaveVision™ Digital Interface Board.
Connect a clean +5V power supply to pin 2 of Power
Connector JR1. Pin 1 is ground.
Connect a signal from
connector J9. Be sure to use a bandpass filter before
the Evaluation Board.
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
WaveVision™ software.
Power Supply
Connect
GND
+5V
Signal
Input
JR1
the
J9
Bandpass Filter
evaluation
Signal
Cond.
a 50-Ohm source to
Clock
Input
EVALUATION BOARD
ADC14C105
board
Xtal
Signal Generator
See the
to
Figure 2. Test Set up
the
4
4.0 Functional Description
The ADC14C105 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 ADC14C105 Evaluation Board comes
configured for input frequencies greater than 70MHz as
seen in Figure 3.
The input network is intended to accept a low-noise sine
wave signal of up to 2V peak-to-peak amplitude. To
accurately evaluate the dynamic performance of this
converter, the input test signal will have to be passed
through a high-quality bandpass filter.
V
IN
Figure 3. Analog Input Network for F
0.1uF
0.1uF
MABACT0039
MABACT0039
WaveVision4 Board
http://www.national.com
0.1uF
0.1uF
Power Supply
25Ω
25Ω
0.1uF
5V
IN
GND
+5V
> 70MHz
V
10pF
CMO
Input
ADC