Analog Devices EVAL-AD5325DBZ Manuale utente

EVAL-AD5325DBZ User Guide

UG-976

One Technology Way •P. O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: 781.329.4700 •Fax: 781.461.3113 •www.analog.com

Evaluation Board for the AD5325 12-Bit, Quad Channel, Voltage Output

Digital-to-Analog Converter (DAC)

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.Rev. A | Page 1 of 13

FEATURES

Full featured evaluation board in conjunction with nanoDAC

motherboard (EVAL-MBnanoDAC-SDZ)

On-board references

Various link options

PC control in conjunction with Analog Devices, Inc., system

demonstration platform (SDP)

PACKAGE CONTENTS

EVAL-AD5325DBZ evaluation board

EVAL-MBnanoDAC-SDZ motherboard

SOFTWARE REQUIRED

EVAL-AD5325DBZ evaluation software

HARDWARE REQUIRED

EVAL-SDP-CB1Z board (SDP-B controller board), must be

purchased separately

GENERAL DESCRIPTION

This user guide details the operation of the evaluation board for

the AD5325 quad channel, voltage output DAC.

The evaluation board is designed to help users quickly

prototype new AD5325 circuits and reduce design time. The

AD5325 operates from a single 2.5 V to 5.5 V supply.

Full details are available in the AD5325 data sheet, which must

be consulted in conjunction with this user guide when using the

evaluation board.

The evaluation board interfaces to the USB port of a PC via the

SDP-B board (E VA L -SDP-CB1Z). Software is supplied with the

evaluation board to allow the user to program the AD5325.

This evaluation board requires the SDP-B board (E VA L -SDP-

CB1Z) board, which is available for order on the Analog

Devices website at www.analog.com.

EVAL-AD5325DBZ, EVAL-MBnanoDAC-SDZ, AND SDP-B BOARDS

14455-001

Figure 1.

UG-976 EVAL-AD5325DBZ User Guide

Rev. A | Page 2 of 13

TABLE OF CONTENTS

Features .............................................................................................. 1

Package Contents .............................................................................. 1

Software Required ............................................................................ 1

Hardware Required .......................................................................... 1

General Description ......................................................................... 1

E VA L-AD5325DBZ, EVAL-MBnanoDAC-SDZ, and SDP-B

Boards................................................................................................. 1

Revision History ............................................................................... 2

Evaluation Board Hardware ............................................................ 3

Power Supplies .............................................................................. 3

Motherboard Link Options......................................................... 3

Daughter Board Link Options.....................................................3

Evaluation Board Software Quick Start Procedures.....................4

Installing the Software ..................................................................4

Running the Software ...................................................................4

Software Operation .......................................................................5

Evaluation Board Schematics and Artwork...................................6

E VA L-MBnanoDAC-SDZ Motherboard ...................................6

E VA L-AD5325DBZ Daughter Board ...................................... 10

Ordering Information.................................................................... 12

Bill of Materials........................................................................... 12

REVISION HISTORY

10/2017—Rev. 0 to Rev. A

Change to Table 6 ........................................................................... 13

3/2017—Revision 0: Initial Version

EVAL-AD5325DBZ User Guide UG-976

Rev. A | Page 3 of 13

EVALUATION BOARD HARDWARE

POWER SUPPLIES

The nanoDAC® E VA L -MBnanoDAC-SDZ motherboard

supports single and dual power supplies.

The E VA L -AD5325DBZ 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

E VA L-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, VDD

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, VSS

Dual supply, −5.5 V

J6, Pin 1 (J6-1) VLOGIC Digital supply from 1.8 V to VDD

J6, Pin 2 (J6-2)

DGND

Digital ground

MOTHERBOARD LINK OPTIONS

Various link options are incorporated in the E VA L-

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 11).

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 E VA L -AD5325DBZ daughter board has one link option.

This link sets the least significant bit (LSB) of the I2C address of

the DAC. Table 3 describes the function of the link. Set LK1 to

Position B for proper device operation.

Table 3. Link Options for Daughter Board

Link Number Label Position

LK1 A0 A (high)

B (low, default)

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 VDD 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.

Position C selects an external supply voltage, VDD.

LK6 This link selects the VLOGIC 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 (VLOGIC).

LK7 This link selects the negative DAC analog voltage source.

Position A selects VSS.

Position B selects AGND.

UG-976 EVAL-AD5325DBZ User Guide

Rev. A | Page 4 of 13

EVALUATION BOARD SOFTWARE QUICK START PROCEDURES

INSTALLING THE SOFTWARE

The AD5325 evaluation software is compatible with Windows®

Vista (64-bit/32-bit) and Windows 7 (64-bit/32-bit).

Install the software before connecting the SDP-B board to the

USB port of the PC to ensure that the SDP-B board is

recognized when it connects to the PC.

To install the AD5325 evaluation software, take the following

steps:

1. Start the Windows operating system.

2. Download the installation software from the E VA L-

AD5325DBZ evaluation board page.

3. Run the setup.exe file from the installer folder if it does not

open automatically.

4. After the installation is complete, power up the evaluation

board as described in the Power Supplies section.

5. Connect the E VA L-AD5325DBZ evaluation board to the

SDP-B controller board and connect the SDP-B board to

the PC using the USB cable included in the evaluation kit.

6. When the software detects the E VA L-AD5325DBZ,

proceed through any dialog boxes that appear to finalize

the installation.

RUNNING THE SOFTWARE

To run the program, do the following:

1. Connect the evaluation board to the SDP-B board and

connect the USB cable between the SDP-B board and the PC.

2. Power up the evaluation board as described in the Power

Supplies section.

3. From the Start menu, click All Programs, Analog Devices,

AD5325 Evaluation Software.

If the SDP-B board is not connected to the USB port when the

software is launched, a connectivity error displays (see Figure 2).

Connect the evaluation board to the USB port of the PC and

wait a few seconds. When the SDP-B board is detected, the

display is updated (see Figure 3).

Alternatively, the software can be used without an evaluation

board. The software runs in simulation mode displaying

expected outputs based on the input data. The main window of the

AD5325 evaluation software then opens, as shown in Figure 4.

14455-002

Figure 2. Connectivity Error

14455-003

Figure 3. Hardware Select

EVAL-AD5325DBZ User Guide UG-976

Rev. A | Page 5 of 13

14455-004

Figure 4. AD5325 Evaluation Board Software Main Window

SOFTWARE OPERATION

The software for the AD5325 allows the user to program values

to the input and DAC registers of each DAC individually.

Write to Input Register

Click Write to Input Register to load the code of the input data

control to the input register of selected DAC in the DAC

Selection box.

LDAC Control

Click Pulse LDAC to bring the LDAC pin low and then back

high. Doing this copies the data from the input registers to the

DAC registers, and the outputs update accordingly.

The LDAC pin can also be set high or low by clicking LDAC

HIGH or LDAC LOW, respectively.

Power-Down Control

All of the DACs can be powered down simultaneously. The

DACs have a selection box that allows the device to operate in

normal mode or in three different power-down modes. Click

the blue progressive disclosure button on the POWER-DOWN

LOGIC block to access the Powerdown configuration window,

which allows the device to operate in normal mode or power-down

mode, as shown in Figure 5. Click OK to write the appropriate

values to the AD5325 when the power-down setting is selected.

14455-005

Figure 5. Powerdown Configuration Window

CLR Control

The CLR bit can also be set high or low by clicking the blue

progressive disclosure button on the I2C block and selecting the

appropriate radio button, as shown in Figure 6. Click OK to write

the appropriate values to the AD5325 when the CLR settings for

the DAC are selected.

14455-006

Figure 6. CLR Configuration Window

UG-976 EVAL-AD5325DBZ User Guide

Rev. A | Page 6 of 13

EVALUATION BOARD SCHEMATICS AND ARTWORK

EVAL-MBnanoDAC-SDZ MOTHERBOARD

EXT_VDD

VLOGIC

GND

EXT_VSS

SDP

STANDARD

CONNECTOR

PARALLEL

PORT

SPORT

SPI

I2C

GENERAL

INPUT/OUTPUT

TIMERS

*NC ON BLACKFIN SDP 120

119

118

GND

117

GND

116

VIO(+3.3V)

115

GND

114

PAR_D22*

113

PAR_D20*

112

PAR_D18*

111

PAR_D16*

110

PAR_D15

109

GND

108

PAR_D12

107

PAR_D10

106

PAR_D8

105

PAR_D6

104

GND

103

PAR_D4

102

PAR_D2

101

PAR_D0

100

PAR_WR

PAR_INT

GND

PAR_A2

PAR_A0

PAR_FS2

PAR_CLK

GND

SPORT_RSCLK

SPORT_DR0

SPORT_RFS

SPORT_TFS

SPORT_DT0

SPORT_TSCLK

GND

SPI_SEL_A

SPI_MOSI

SPI_MISO

SPI_CLK

GND

SDA_0

SCL_0

GPIO1

GPIO3

GPIO5

GND

GPIO7

TMR_B

TMR_D

CLK_OUT

GND

WAKE

SLEEP

GND

UART_TX

BMODE1

60 RESET_IN

59 UART_RX

58 GND

57 RESET_OUT

56 EEPROM_A0

55 NC

54 NC

53 NC

52 GND

51 NC

50 NC

49 TMR_C*

48 TMR_A

47 GPIO6

46 GND

45 GPIO4

44 GPIO2

43 GPIO0

42 SCL_1

41 SDA_1

40 GND

39 SPI_SEL1/SPI_SS

38 SPI_SEL_C

37 SPI_SEL_B

36 GND

35 SPORT_INT

34 SPI_D3*

33 SPI_D2*

32 SPORT_DT1

31 SPORT_DR1

30 SPORT1_TDV*

29 SPORT0_TDV*

28 GND

27 PAR_FS1

26 PAR_FS3

25 PAR_A1

24 PAR_A3

23 GND

22 PAR_CS

21 PAR_RD

20 PAR_D1

19 PAR_D3

18 PAR_D5

17 GND

16 PAR_D7

15 PAR_D9

14 PAR_D11

13 PAR_D13

12 PAR_D14

11 GND

10 PAR_D17*

9PAR_D19*

8PAR_D21*

7PAR_D23*

6GND

5USB_VBUS

4GND

3GND

2NC

1VIN

J10

1A0

2A1

3A2

4VSS

VCC 7

WP 6

SCL 5

SDA

24LC32

100kΩ

DNP

DGND AGND

BEAD

1.6Ω

C11

4.7µF

C10

0.1µF

+C7

10µF

1VIN

2GND

3EN 4

VOUT

ADP121-AUJZ33

1µF

LK5

J6-1

J6-2

0.1µF

10µF

LK6

J5-1

J5-2

J5-3

0.1µF

10µF

LK7

R7 100Ω

R5 100Ω

R6 100Ω

R8 100Ω

R9 100Ω

R10 100Ω

R11 100Ω

R12 100Ω

R13 100Ω

R14 100Ω

0.1µF

+C9

10µF

R15

100Ω

R16

DNP

GAIN

SCL

SDA

DB0

DB2

DB4

DB6

DB8

DB10

DB1

DB3

DB5

DB7

DB9

DB11

+3.3V

DGND

+5V

USB_VBUS

+3.3V

VDD

+3.3V

DGND

VLOGIC

DGND

+3.3V

DGNDDGND

VSS

+5V

CLR

LDAC

SCLK

SDO

SDIN

SYNC

EXT_VDD

+5V

DGND

14455-007

Figure 7. Motherboard SDP-B Connector and Power Supply

EVAL-AD5325DBZ User Guide UG-976

Rev. A | Page 7 of 13

EX_REF_1 EX_REF_2 EX_REF_3 EX_REF_4

VREF_1 VREF_2 VREF_3 VREF_4

REF3

REF4

REF1

REF2

+5VREF

+2_5VREF

+4_096VREF

VREF1

+5VREF

+2_5VREF

+4_096VREF

VREF2

+5VREF

+2_5VREF

+4_096VREF

VREF3

+5VREF

+2_5VREF

+4_096VREF

VREF4

VDD VDD VDD VDD

14455-008

+2.5V +4.096V

C16

1µF

C15

1µF

OUTPUT

2VS

3SLEEP

GND

REF198

C17

1µF

+5V

+2.5V +4.096V

2VIN

5TRIM

VOUT

GND

ADR445ARMZ

2VIN

GND

TRIM

7COMP

VOUT

ADR431BRZ

+5VREF+2_5VREF +4_096VREF

VDD VDD

VDD

Figure 8. Motherboard Reference Voltage Selector Circuit

DAUGHTER BOARD CONNECTOR

SPI PMOD CONNNECTOR GPIO PMOD CONNNECTOR

I2C PMOD CONNNECTOR

1 2

3 4

5 6

7 8

910

11 12

13 14

15 16

SDIN SDO SCLK SYNC SCL LDAC CLR PD GAIN SDA

1 2

3 4

7 8

J8-1

J8-2

J8-3

J8-4

J8-5

J8-6

J7-1

J7-2

J7-3

J7-4

J7-5

J7-6

J3-1

J3-2

J3-3

J3-4

J3-5

J3-6

J4-1

J4-2

J4-3

J4-4

J4-5

J4-6

J4-7

J4-8

VDD

VREF1

VREF2

VREF3

VREF4

VLOGIC

SDASCL

SYNC

SCLK

SDO

SDIN LDAC

CLR

GAIN

DB6

DB7

DB8

DB9

DB0

DB1

DB2

DB3

VOUT_0

VOUT_1

VOUT_2

VOUT_3

VOUT_4

VOUT_5

VOUT_6

VOUT_7

SCL

SDA

DGND

VLOGIC

SCL

SDA

DGND

VLOGIC

SYNC

SDO

SDIN

SCLK

DGND

VLOGIC

GAIN

DGND

LDAC

CLR

VLOGIC

DGND

CS WR

DB11

DB5

DB10

DB4

AGND

14455-009

Figure 9. Motherboard Connectors to Daughter Board and Serial Interface

VOUT_0

VOUT_1

VOUT_2

VOUT_3

VOUT_4

VOUT_5

VOUT_6

VOUT_7

U10-A

AD8608ARUZ

–

U10-B

AD8608ARUZ

–

U10-C

AD8608ARUZ

–

U10-D

AD8608ARUZ

2–

U7-A

AD8616ARZ

6–

U7-B

AD8616ARZ

V+

V–

U7-C

AD8616ARZ

2–

V–

V+

U11

AD8655

2–

V–

V+

U12

AD8655

VOUT_0

VOUT_1

VOUT_2

VOUT_3

VOUT_4

VOUT_5

VOUT_6

VOUT_7

VDD

VSS

VDD

VSS

14455-010

Figure 10. Motherboard Output Amplifier Circuit

UG-976 EVAL-AD5325DBZ User Guide

Rev. A | Page 8 of 13

14455-011

Figure 11. Motherboard Component Placement

14455-012

Figure 12. Motherboard Top Side Routing

EVAL-AD5325DBZ User Guide UG-976

Rev. A | Page 9 of 13

14455-013

Figure 13. Motherboard Bottom Side Routing

UG-976 EVAL-AD5325DBZ User Guide

Rev. A | Page 10 of 13

EVAL-AD5325DBZ DAUGHTER BOARD

0.1µF

+C6

10µF

R1 DNP

VOUT_A

R2 DNP

VOUT_B

R3 DNP

VOUT_C

R4 DNP

VOUT_D

DNP

VDD

VOUTA

VOUTB

VOUTC

REFIN

VOUTD

GND

8SDA

9SCL

10 A0

AD5325BRMZ

J3-1

J3-2

J3-3

J3-4

J3-5

J3-6

J4-1

J4-2

J4-3

J4-4

J4-5

J4-6

J4-7

J4-8

3 4

7 8

910

11 12

13 14

15 16

LK1

VREF1

VDD

SDA

SCL

VOUT_0

VOUT_1

VOUT_2

VOUT_3

VDD

VREF1

VREF2

VREF3

VREF4

VLOGIC

SDASCL

SYNC

SCLK

SDO

SDIN LDAC

CLR

GAIN

VOUT_0

VOUT_1

VOUT_2

VOUT_3

VOUT_4

VOUT_5

VOUT_6

VOUT_7

DB6

DB7

DB8

DB9

DB0

DB1

DB2

DB3

DGND

DB11

DB5

DB10

DB4

AGND

14455-014

Figure 14. Daughter Board Schematics

14455-015

Figure 15. Daughter Board Component Placement

14455-016

Figure 16. Daughter Board Top Side Routing

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