Evaluation Board User Guide
UG-469
Rev. 0 | Page 3 of 20
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The EVAL-MB-LV-SDZ motherboard supports using single and
dual power supplies.
The
EVAL-AD5144DBZ
evaluation board can be powered either
from the SDP port or externally by the J1 and J2 connectors, as
described in Table 1.
All supplies are decoupled to ground using 10 µF tantalum and
0.1 µF ceramic capacitors.
Table 1. Maximum and Minimum Voltages of the Connectors
Connector No. Label
Voltage
J1-1
VDD
Analog positive power supply, V
DD
.
Single supply from 2.3 V to 5.5 V.
Dual supply from 2.25 V to 2.75 V.
J1-2
AGND
Analog ground.
J1-3
VSS
Analog negative power supply, V
SS
.
Dual supply from −2.25 V to −2.75 V.
J2-1
VLOGIC
Digital supply, from 1.8 V to V
DD
.
J2-2
DGND
Digital ground.
Link Options
Several link and switch options are incorporated in the EVAL-
MB-LV-SDZ motherboard and should be set up before using
the board. Table 2 describes the positions of the links to control
the evaluation board via the SDP board using a PC. The
functions of these link options are described in detail in Table 3
through Table 6.
Table 2. Link Options Setup for SDP Control (Default)
Link No.
Option
A5
+3V3
A11
3.3 V
A12
AGND
DIGITAL INTERFACE
The
EVAL-AD5144DBZ
can be configured as an I
2
C or SPI
digital interface, depending on the position in the A1 jumper.
If the part is configured in I
2
C mode, the ADDR0 and ADDR1
jumpers select the I
2
C address.
Table 3. Link Functions
Link No.
Power Supply
Options
A5
V
LOGIC
This link selects one of the following as the digital supply:
+3V3 (3.3 V from SDP).
VLOGIC EXT (external supply from the J2 connector).
A11
V
DD
This link selects one of the following as the positive power supply:
+5 V (5 V from SDP).
3V3 (3.3 V from SDP).
VDD (external supply from the J1 connector).
A12
V
SS
This link selects one of the following as the negative power supply:
AGND.
EXTVSS (external supply from the J1 connector).
