Evaluation Board User Guide
UG-250
EVALUATION BOARD HARDWARE
Default Link Option Setup
POWER SUPPLIES
The default link options are listed in Table 1.
The AD5421 evaluation board requires one power supply
connection from LOOP− to LOOP+ (J7), a voltage in the
range from 5.5 V to 52 V can be applied if the on-board
MOSFET device (U2) is not enabled. With U2 enabled, the
voltage limit is the breakdown voltage of U2, which in this
case is 240 V. A load resistor can also be connected at J7.
Table 1. Link Options
Link No.
Option
LK1
Inserted
LK2
B
LK4
Inserted
LINK OPTIONS
LK6
LK7
Inserted
Inserted
Set the link options on the evaluation board for the required
operating setup before powering on the board. The functions
of the link options are described in Table 2.
Alarm_Dir
Rint_Rext
Range0
Range1
Reg_Sel0
Reg_Sel1
Reg_Sel2
B
B
B
B
A
B
A
Rev. A | Page 3 of 12
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