EVAL-5CH6CHSOICEBZ Datasheet, PDF (3/8 Pages) Analog Devices – Access to all data channels

EVAL-5CH6CHSOICEBZ User Guide
UG-936
EVALUATION BOARD CIRCUITRY
PCB EVALUATION GOALS
The EVAL-5CH6CHSOICEBZ achieves the following goals:
• Evaluates the full range of iCoupler data transfer functions.
• Independently powers each side of an iCoupler isolator.
• Allows high differential voltage to be applied between the
two sides of an iCoupler isolator. The evaluation board is
intended for evaluation of the components, but is not safety
certified for high voltage operation. If applying differential
voltages above 60 V, external safety measures appropriate for
the voltage must be in place.
• Allows easy connection to power supplies, data channels,
and instrumentation.
The evaluation board comes installed with power terminals,
bypass capacitors, and header pins. The EVAL-ADuM163N0EBZ
is available with the ADuM163N0 device, which is installed on
the EVAL-5CH6CHSOICEBZ evaluation board. All other
compatible iCoupler digital isolators must be ordered and installed
separately on the EVAL-5CH6CHSOICEBZ evaluation board.
The board is compatible with 5-channel and 6-channel
devices, such as the ADuM150N/ADuM151N/ADuM152N,
the ADuM160N/ADuM161N/ADuM162N/ADuM163N, the
ADuM250N/ADuM251N/ADuM252N, and the ADuM260N/
ADuM261N/ADuM262N/ADuM263N.
CONNECTORS
The PCB provides support for three types of interconnections.
• SMA edge mounted connectors
• Through-hole signal ground pairs
• Terminal blocks for power connections
With these three options, temporary and permanent
connections to the evaluation board can be made.
When coaxial connections are required, SMA connector positions
are available for digital input/output signals and the VDD1/VDD2
power supplies. The SMA connector positions are unpopulated as
shipped and must be ordered from a distributor separately. Figure 2
shows examples of installed SMA connectors; these connectors are
not only low profile and provide excellent mechanical connections
to the PCB, but also support 50 Ω coaxial cabling.
1) SCOPE PROBE
2) SMA CONNECTOR
5) SCOPE PROBE
HEADER
3) TERMINAL
BLOCK
6) PADS TO
CONNECT SMA
4) SHORTING
JUMPER
Figure 2. Optional Components
Power can be connected through the J1 and J2 screw terminals or
through the optional VDD1 and VDD2 SMA connectors. Signals
can be routed in or out with the provided header pins or the
optional SMA connectors. The pin spacing of each through-hole
connector is 0.1 inch between the centers. There are additional
signal test points with 0.2 inch spacing provided for active scope
probes. These header pins must be added separately. The
installed probe points are shown in Figure 2.
INPUT POWER
Each side of an iCoupler standard data isolator requires an off-
board power source. On the silkscreen, the J1 and J2 screw
terminals are marked 1 for VDDx and 2 for GNDx.
Divided power and ground planes are present on Layer 2 and
Layer 3 of the PCB on each side of the isolation barrier. This
configuration is shown in Figure 6 and Figure 7, respectively.
DATA INPUT/OUTPUT (I/O) STRUCTURES
Each data channel has a variety of structures to help configure,
load, and monitor both the input and output. Figure 3 shows an
example of the routing from an external connection to the pin
of the device under test (DUT). Each data channel has similar
connections.
Starting at the external connection, the signal path is constructed in
the following order (see Figure 3 for the locations of these
components):
1. A pad layout for a PCB board edge mounted SMA connector.
2. Two 0805 pads are provided where 100 Ω resistors to
ground can be installed. The combined resistance is 50 Ω
to provide a termination for a standard coaxial cable.
3. A standard 0805 pad layout that allows the coaxial and
termination structures to be connected to the rest of the
signal path.
4. A 0603 pad layout between the signal path and VDDx for a
pull-up resistor, if required.
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