Evaluation Board Hardware; Power Supplies; Input Signals; Output Signals - Analog Devices EVAL-ADG5404FEBZ User Manual

UG-790

EVALUATION BOARD HARDWARE

The operation of the ADG5404F
ADG5404FEBZ. Figure 1 shows a typical setup where only a
power supply and signal generator are required. Figure 2 shows
a block diagram of the main components of the evaluation
board.
The connectors on the board pass signals through the
switch. The source pins have fault detection circuitry that reacts
to an overvoltage. During an overvoltage event, the switch is
turned off and the FF pin is pulled low. The SF pin is pulled low
when the source where the overvoltage occurs is the one selected
by the A0/F0 and A1/F1 pins. See the
further details.

POWER SUPPLIES

Connector J3 provides access to the supply pins of the
ADG5404F. VDD, GND, and VSS link to the appropriate pins
on the ADG5404F. For dual supply voltages, power the evaluation
board from ±5 V to ±22 V. For single supply voltages, connect
the GND and V terminals and power the evaluation board
SS
with 8 V to 44 V. Additionally, an on-board LDO regulator is
provided for digital control voltage. If necessary, connect a
secondary voltage source to DC_V1 and use it as the digital
control voltage. To use DC_V1, place the header of LK5 into
Position A.

INPUT SIGNALS

Two screw connectors are provided to connect to both the
source and drain pins of the ADG5404F. Additional subminiature
Version B (SMB) connector pads have been laid out if extra
connections are required.
The ADG5404F is overvoltage protected on the source side, and
the maximum voltage that can be applied to S1 to S4 is −55 V or
+55 V. See the ADG5404F data sheet for more details.
Each trace on the source and drain side includes two sets of
gold pin connectors that are used to place a load on the signal
path to ground. A 0 Ω resistor is placed in the signal path and
is evaluated using the EVAL-
ADG5404F
ADG5404F data sheet for
Rev. 0 | Page 4 of 6
EVAL-ADG5404FEBZ User Guide
can be replaced with a user defined value. Use the resistor
combined with the gold pin connectors to create a simple
resistor/capacitor (RC) filter.
The ADG5404F uses parallel interface channels (A0/F0, A1/F1)
to control the operation of the switches. Use the headers on LK2
to LK4 to manually control the operation of the switches, or
connect an external controller directly to the control pins by
using the SMB connectors, A0/F0, A1/F1, and EN, and removing
the link headers on LK2 to LK4.

OUTPUT SIGNALS

There are two outputs on the ADG5404F. The FF pin indicates
when the device is operating normally or whether there is an
overvoltage fault on one of the source pins. The SF pin also
indicates when an overvoltage occurs on one of the source pins
and transitions low only when an overvoltage occurs on the
channel selected by the A0/F0 and A1/F1 inputs. For visual
indication, an LED is mounted on the evaluation board. Use
LK8 to connect the LED circuit. When the device is operating
normally, the FF pin remains high and the LED turns on. If an
overvoltage occurs at any of the source pins, the FF pin is pulled
low and the LED turns off.
The LK9 selector allows the user to choose which output controls
the LED. Putting the header on Position A allows the FF pin to
control the LED. On Position B, the SF pin controls the LED.
SMB connectors are provided to interface the evaluation board
with external controllers, and two gold pin connectors are provided
to connect a pull-up resistor between the FF and SF signals and
the digital supply.
The DR pin allows the user to choose the state of the drain pin
when the device is deactivated during an overvoltage. The LK1
selector allows the user to choose between open circuit and pulling
to the rails.