Analog Devices EVAL-AD5326DBZ, User Manual

EVAL-AD5326DBZ User Guide 

UG-977

Rev. 0 | Page 3 of 14 

EVALUATION BOARD HARDWARE 

POWER SUPPLIES 

The 

nano

DAC® 

EVAL-MBnanoDAC-SDZ

 motherboard 

supports single and dual power supplies. 

The 

EVAL-AD5340DBZ

 evaluation board can be powered 

either from the 

SDP-B

 port or externally by the J5 and J6 

connectors, as described in Table 1. 

Both AGND and DGND inputs are provided on the board. The 
AGND and DGND planes are connected at one location on the 

EVAL-MBnanoDAC-SDZ

. It is recommended that AGND and 

DGND not be connected elsewhere in the system to avoid 
ground loop problems. 

All supplies are decoupled to ground with 10 μF tantalum and 
0.1 μF ceramic capacitors. 

Table 1. Power Supply Connectors 

Connector No. 

Label 

Voltage 

J5, Pin 1 (J5-1) 

VDD 

Analog positive power supply, V

DD

Single and dual supply, 5.5 V 

J5, Pin 2 (J5-2) 

AGND 

Analog ground 

J5, Pin 3 (J5-3) 

VSS 

Analog negative power supply, V

SS

Dual supply, −5.5 V 

J6, Pin 1 (J6-1) 

VLOGIC 

Digital supply from 1.8 V to V

DD

J6, Pin 2 (J6-2) 

DGND 

Digital ground 

MOTHERBOARD LINK OPTIONS 

Various link options are incorporated in the 

EVAL-MBnanoDAC-

SDZ

 and must be set for the required operating conditions 

before using the board. Table 2 describes the positions of the 
links to control the evaluation board via the 

SDP-B

 board using 

a PC and external power supplies. The functions of these link 
options are described in detail in Table 4. 

The positions listed in Table 2 and Table 4 match the evaluation 
board imprints (see Figure 12). 

Table 2. Link Options Setup for 

SDP-B

 Control (Default) 

Link Number  

Position 

REF1 2.5V 
REF2 EXT 
REF3 EXT 
REF4 EXT 
LK5 C 
LK6 +3.3V 
LK7 B 

DAUGHTER BOARD LINK OPTIONS 

The 

EVAL-AD5340DBZ

 daughter board has two link options. 

These links set the least significant bits (LSBs) of the I

2

C addresses 

of the DAC. Table 3 describes the function of these links. Set 
LK1 and LK2 to Position B for proper device operation. 

Table 3. Link Options for Daughter Board 

Link Number 

Label 

Position 

LK1 

A0 

B (low, default) 

A (high) 

LK2 

A1 

B (low, default) 

A (high) 

Table 4. Link Functions 

Link Number 

Function  

REF1, REF2, REF3, REF4 

These links select the reference source. 

Position EXT selects an off board voltage reference via the appropriate EXT_REF connector. 

Position VDD selects V

DD

 as the reference source. 

Position 4.096V selects the on-board 4.096 V reference as the reference source. 

Position 2.5V selects the on-board 2.5 V reference as the reference source. 

Position 5V selects the on-board 5 V reference as the reference source. 

LK5 

This link selects the positive DAC analog voltage source.  

Position A selects the internal voltage source from the 

SDP-B

 board. 

Position B selects the internal voltage source, 3.3 V from the 

ADP121

 on the motherboard.  

the  

Position C selects the external supply voltage, V

DD

. 

LK6 

This link selects the V

LOGIC

 voltage source. 

Position 3.3V selects the digital voltage source from the 

SDP-B

 board (3.3 V). 

Position VLOGIC selects an external digital supply voltage (V

LOGIC

). 

LK7 

This link selects the negative DAC analog voltage source. 

Position A selects V

SS

. 

Position B selects AGND.