National Semiconductor ADC08100, Инструкция по эксплуатации

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Caution: Be sure that the oscillator used has logic levels
of -0.6V and -1.3V. We have found oscillators with levels
that are too low to work properly in the circuit designed
for this board.
Interface Board and the host computer. See the Digital
Interface Board manual for details.
5.1 Software Installation
The WaveVision software provided requires 300k bytes
of hard drive space and will run under Windows.
R4 and C1 are used for high frequency termination of
the clock line. An 80MHz clock oscillator should be
used on the Digital Interface Board with that board's
clock divider set for 2. See the Digital Interface Board
manual for details.
1. Insert the disk into a 3.5" floppy drive.
2. Copy the program WAVEVSN2.EXE to the desired
subdirectory on you computer's hard disk and
RUN
it.
5.2 Setting up the ADC08100 Evaluation Board
4.4 Digital Data Output.
This evaluation package was designed to be easy and
simple to use, and to provide a quick and simple way to
evaluate the ADC08100. The procedures given here will
help you to properly set up the board.
The digital output data from the ADC08100 is available at
the 96-pin Euro connector J3. The series resistors of RP1
isolate the ADC from the load circuit to reduce noise
coupling into the ADC.
5.2.1 Board Set-up
Refer to Figure 1 for locations of connectors, test points
and jumpers on the board.
4.5 Power Supply Connections
5.2.1.1 Computer Mode Operation
Power to this board is supplied through power connector
P1. The only Voltages needed for the ADC08100
evaluation board are +5V and -5.2V supplies.
1. Be sure a 100MHz clock oscillator (Y1) is in place
on the ADC08100 evaluation board and an 80MHz
crystal is on the Digital Interface board.
When using the ADC08100 Evaluation Board with the
Digital Interface Board, the 5V logic power supply for the
interface board is passed through the ADC01800
evaluation board from pin 3 of Power Connector P1. The
supply voltages are protected by shunt diodes D1, D2
and D3. The +3 Volts needed for the ADC08100 is
provided with voltage regulator U6, an LM2931CT.
2. Set jumper J4 to its default position, as shown in
Figure 1
to divide the clock oscillator frequency by
two for the ADC08100.
3. Connect power to the board per requirements of
section 4.6 and confirm that Red LED D4 on the
ADC08100 evaluation board and D1 on the Digital
Interface board are on, indicating clock presence.
4.6 Power Requirements
4. Connect The ADC08100 evaluation board to Digital
Interface Board, WAVEVSN RD 3.0.
Voltage and current requirements for the ADC08100
Evaluation Board are:
5. Connect a cable with DB-9 connector between the
Digital Interface Board connector P1 and a serial
port on your computer.
•
Pin 1 of P1: +5.0V ±5% at 100 mA
•
Pin 3 of P1: +5.0V ±5% at 750mA.
6. Be sure jumper JP4 is set to divide the 100MHz
clock by 2. This is the default position as shown in
Figure 1.
•
Pin 4 of P1: - 5.2V ±0.1V at 250 mA.
Pin 2 of P1 is ground. The +5V supply at pin 3 of the
Power Connector P1 provides the power to the Digital
Interface Board, where most of the power through this pin
is consumed.
7. Connect an appropriate signal source to BNC
connector J2 of the ADC08100 evaluation board.
5.2.1.2 Manual Mode Operation
1. Perform steps 1 and 2 of section 5.2.1.1, above
5.0 Installing and Using the ADC08100
Evaluation Board
2. Connect power to the board per requirements of
section 4.6 is on, indicating clock presence.
3. Monitor the ADC08100 output at 96-pin connector
J3 pins B16 through B19 and C16 through C19 (see
appendix for pin configuration).
The evaluation board requires power supplies as
described in Section 4.6. An appropriate signal generator
(such as the HP3325B, HP8662A or the Tektronix
TSG130A) with 50 Ohm source impedance should be
connected to the Analog Input BNC, J2, through a
bandpass filter. The generator output should be filtered
by a bandpass filter when evaluating sinusoidal signals to
be sure there are no unwanted frequencies (harmonics
and noise) presented to the ADC. A cable with a DB-9
connector must be connected between the Digital
4. Clock the data out with a TTL clock of any speed up
to 100 MHz at pin B25 of 96-pin connector J3.
5.2.2 Quick Check of Analog Functions
Refer to Figure 1 for locations of connectors, test points
and jumpers on the board. If at any time the expected
response is not obtained, see section 5.2.6 on
Troubleshooting.
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