Evaluation Board User Guide
UG-XXX
REFERENCE OPTIONS
The EVAL-AD7124-8SDZ includes an external 2.5 V reference
(the ADR4525) and an internal 2.5 V reference. The default
operation is to use the external reference input, which is set to
accept the 2.5 V ADR4525 on the evaluation board.
The reference used for a conversion is selected by choosing the
reference in the Configx registers associated with Setup 0 to
Setup 15.
Switch between using the internal reference and external reference
by accessing the AD7124-8 register map via the evaluation soft-
ware. Figure 2 shows how to select the reference source for
Setup 0 to Setup 15. Figure 3 shows the ADC_Control register
setting that enables the internal reference.
Figure 2. Selecting the Reference Source
Figure 3. Turning On the Internal 2.5 V Reference
EVALUATION BOARD SETUP PROCEDURES
After following the instructions in the Software Installation
Procedures section, set up the evaluation and SDP boards as
detailed in this section.
Warning
The evaluation software and drivers must be installed before con-
necting the evaluation board and
board to
the USB port of the PC to ensure that the evaluation system is
correctly recognized when it is connected to the PC.
Configuring the Evaluation and SDP Boards
1.
board to Connector A or
board. Screw
the two boards together using the plastic screw-washer set
included in the evaluation board kit to ensure that the
boards are connected firmly together.
2.
Connect the power supplies to the EVAL-AD7124-8SDZ
board. The EVAL-AD7124-8SDZ board, by default, uses
the wall wart (dc plug) supply that accompanies the
evaluation kit. Connect this supply to J5 on the EVAL-
AD7124-8SDZ board. (For more information about the
required connections and available options, refer to the
Power Supplies section.)
3.
board to the PC using the
supplied USB cable.
Rev. PrA | Page 7 of 36
Summary of Contents for UG Series
Page 19: ...Evaluation Board User Guide UG XXX Figure 22 Schematic Power Supply Rev PrA Page 19 of 36 ...
Page 20: ...UG XXX Evaluation Board User Guide Figure 23 Schematic Regulators Rev PrA Page 20 of 36 ...
Page 21: ...Evaluation Board User Guide UG XXX Figure 24 Schematic SDP Rev PrA Page 21 of 36 ...
Page 23: ...Evaluation Board User Guide UG XXX Figure 26 Layer 1 Component Side Rev PrA Page 23 of 36 ...
Page 24: ...UG XXX Evaluation Board User Guide Figure 27 Layer 2 Ground Plane Rev PrA Page 24 of 36 ...
Page 25: ...Evaluation Board User Guide UG XXX Figure 28 Layer 3 Power Ground Plane Rev PrA Page 25 of 36 ...
Page 26: ...UG XXX Evaluation Board User Guide Figure 29 Layer 4 Component Side Rev PrA Page 26 of 36 ...
