Analog Devices AD8143-EVALZ, Руководство пользователя

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UG-862 AD8143-EVALZ/AD8145-EVALZ User Guide
Rev. 0 | Page 4 of 9
EVALUATION BOARD HARDWARE
INTRODUCTION
The AD8143-EVALZ / AD8145-EVALZ evaluation board allows
the user to evaluate the AD8143 / AD8145 using both SMA and
UTP cables. Figure 2 shows the typical bench setup used to
evaluate the triple differential receivers with comparators.
POWER SUPPLY
This evaluation board requires a typical ±12 V power supply for
testing the
AD8143 and a ±5 V power supply for testing the
AD8145 . Both the AD8143 and AD8145 need a minimum
power supply of 4.5 V. Connect the supplies as shown in Figure 2.
ANALOG INPUTS
Drive the inputs, either the SMA inputs (INPB, INNB, INPG,
INNG, INPR, and INNR) or the Cat-5 UTP input (P1), with a
waveform generator, a video pattern generator, or a signal source
from a video driver.
ANALOG OUTPUT
For R
LOAD
= 150 Ω, either the SMA outputs (OUTB, OUTG, and
OUTR) or the VGA output (J1) of this evaluation board produce a
voltage of approximately ±3.5 V for both the
AD8143 and the
AD8145 . Check the waveform signal from this output using a
signal analyzer, such as an oscilloscope or a display/monitor.
DIS/PD LOGIC INPUT
Pin DIS/PD, represented by SW1, is a logic input used to reduce
power consumption when either the
AD8143 or the AD8145 is
not in use and does not place the output in a high-Z state when
asserted. Enable the
AD8143 and AD8145 by pulling SW1 to the
positive supply.
QUICK START GUIDE
To begin, take the following steps:
1.
Remove the AD8143 / AD8145 from the box.
2. C5 V to VCC, −5 V to VEE, and GND to the
center pin of P2.
Using the AD8147 / AD8148 video driver as input, take the
following steps:
1.
C5 V to VS+, −5 V to VS−, and GND to the center
pin of P3 of the
AD8147 / AD8148 evaluation board.
2. Connect a video signal from a monitor/laptop or video
pattern generator via the VGA port (P1 of the
AD8147 /
AD8148 evaluation board).
3. Connect a Cat-5 UTP cable between P2 of the AD8147 /
AD8148 evaluation board and P1 of the AD8143 / AD8145
evaluation board.
4. Connect a VGA cable between the J1 connector of the
AD8143 / AD8145 evaluation board and the output monitor
to see the video output signal.
5. Turn on the power supply with ±5 V. The typical current of
VCC/VS+ is 143 mA, and VEE/VS− is −122 mA.
Using a different analog signal as an input signal, take the
following steps:
1.
Connect a differential input signal that is typically ±2.5 V
in INPB and INNB, INPG and INNG, or INPR and INNR
through the SMA to SMA connector between a signal
generator or video pattern generator and the differential
inputs.
2. Connect an oscilloscope or a display/monitor to J1 through
the VGA connector.
3. Turn on the power supply with ±5 V.
4. Turn on the input source. J1 must produce the signal from
the inputs depending on the configured gain.