Analog Devices EVAL-AD5680DBZ Manual de usuario

EVAL-AD5680DBZ User Guide

UG-989

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 AD5680 18-Bit, Single-Channel, Voltage Output DAC

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 12

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-AD5680DBZ evaluation board

EVAL-MBnanoDAC-SDZ motherboard

SOFTWARE NEEDED

EVAL-AD5680DBZ evaluation software

HARDWARE NEEDED

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

separately

GENERAL DESCRIPTION

This user guide details the operation of the EVAL-AD5680DBZ

evaluation board for the AD5680 single-channel, voltage output,

digital-to-analog converter (DAC).

The EVAL-AD5680DBZ evaluation board is designed to help

users quickly prototype new AD5680 circuits and reduce design

time. The AD5680 operates from a single 4.5 V to 5.5 V supply.

For full specifications, see the AD5680 data sheet, which must be

used in conjunction with this user guide when using the evaluation

board.

The EVAL-AD5680DBZ evaluation board interfaces to the USB

port of a PC via the SDP-B board. Software is available for

download via the EVAL-AD5680DBZ product page that allows

users to program the AD5680.

DOCUMENTS NEEDED

Electronic version of the AD5680 data sheet

Electronic version of the EVAL-AD5680DBZ user guide

EVAL-AD5680DBZ, EVAL-MBnanoDAC-SDZ, AND SDP-B BOARDS

14528-001

Figure 1.

UG-989 EVAL-AD5680DBZ User Guide

Rev. 0 | Page 2 of 12

TABLE OF CONTENTS

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

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

Software Needed............................................................................... 1

Hardware Needed ............................................................................. 1

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

Documents Needed.......................................................................... 1

E VA L-AD5680DBZ, EVAL-MBnanoDAC-SDZ, and SDP-B

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

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

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

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

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

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

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

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

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

Write to Input Register .................................................................5

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

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

E VA L-AD5680DBZ Daughter Board .........................................9

Ordering Information.................................................................... 11

Bill of Materials........................................................................... 11

REVISION HISTORY

3/2017—Revision 0: Initial Version

EVAL-AD5680DBZ User Guide UG-989

Rev. 0 | Page 3 of 12

EVALUATION BOARD HARDWARE

MOTHERBOARD POWER SUPPLIES

The EVAL-MBnanoDAC-SDZ motherboard supports single

and dual power supplies.

The EVAL-AD5680DBZ evaluation board can be powered either

from the SDP-B port, or externally by the J5 and J6 connectors,

as described in Table 1.

The AGND and DGND inputs are provided on the EVAL-

MBnanoDAC-SDZ 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 else-

where 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 supply, 5.5 V 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.

LINK OPTIONS

A number of 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 3. The positions listed

in Table 2 and Table 3 match the evaluation board imprints (see

Figure 9).

Table 2. Link Options Setup for SDP-B Control (Default)

Link No. Position

REF1 2.5V

REF2 EXT

REF3 EXT

REF4 EXT

LK5 C

LK6 +3V3

LK7 B

Table 3. Link Functions

Link Number Function

REF1 to REF4 These links select the reference source.

Position EXT selects an off board voltage reference via the appropriate EXT_REF_x 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 digital-to-analog converter (DAC) analog voltage source.

Position A selects the internal voltage source from the SDP-B board.

Position B selects the 3.3 V internal voltage source from the ADP121 on the motherboard.

Position C selects an external supply voltage, VDD.

LK6 This link selects the VLOGIC voltage source.

Position +3V3 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-989 EVAL-AD5680DBZ User Guide

Rev. 0 | Page 4 of 12

10954-003

EVALUATION BOARD SOFTWARE QUICK START PROCEDURES

INSTALLING THE SOFTWARE

The EVAL-AD5680DBZ evaluation software is compatible with

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

The software must be installed before connecting the SDP-B board

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

recognized when it is connected to the PC.

To ins tall the EVAL-AD5680DBZ software, take the following

steps:

1. Start the Windows operating system. Download the

installation software from the EVAL-AD5680DBZ

evaluation board page.

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

open automatically.

3. After installation is complete, power up the EVAL-

AD5680DBZ evaluation board as described in the

Motherboard Power Supplies section.

4. Connect the EVAL-AD5680DBZ evaluation board to the

SDP-B board and the SDP-B board to the PC using the

USB cable included in the evaluation kit.

5. When the software detects the evaluation board, click

through any dialog boxes that appear to finalize the

installation.

RUNNING THE SOFTWARE

To r un the EVAL-AD5680DBZ program, take the following

steps:

1. Connect the EVAL-AD5680DBZ evaluation board to the

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

board and the PC.

2. Power up the EVAL-AD5680DBZ evaluation board as

described in the Motherboard Power Supplies section.

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

AD5680 Evaluation Software.

4. 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 EVAL-AD5680DBZ 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 EVAL-AD5680DBZ evaluation software can

be used without an evaluation board. The EVAL-AD5680DBZ

evaluation software runs in simulation mode, displaying expected

outputs based on the input data. The main window of the EVAL-

AD5680DBZ evaluation software then opens, as shown in

Figure 4.

14528-002

Figure 2. Connectivity Error

14528-003

Figure 3. Hardware Select

EVAL-AD5680DBZ User Guide UG-989

Rev. 0 | Page 5 of 12

14528-004

Figure 4. AD5680 Evaluation Software Main Window

SOFTWARE OPERATION

The software for the AD5680 allows the user to program values

to the input and DAC registers of each DAC individually or

collectively.

WRITE TO INPUT REGISTER

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

control to the DAC register of the DAC. The DAC output is

automatically updated with the appropriate voltage.

When using an external reference other than the default 2.5 V

reference, make sure to update the External Reference (V) input

box with the appropriate value, so that the software outputs the

correct voltage.

UG-989 EVAL-AD5680DBZ User Guide

Rev. 0 | Page 6 of 12

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

1IN

2GND

3EN 4

OUT

ADP121-AUJZ33

1µF C4

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

CS WR

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

DGND

14528-007

Figure 5. EVAL-MBnanoDAC-SDZ Motherboard SDP-B Connector and Power Supply

EVAL-AD5680DBZ User Guide UG-989

Rev. 0 | Page 7 of 12

+2.5V +4.096V

C16

1µF

C15

1µF

OUTPUT

2VIN

3SLEEP

GND

REF198

C17

1µF

+5V

+2.5V +4.096V

EX_REF_1 EX_REF_2 EX_REF_3 EX_REF_4

VREF_1 VREF_2 VREF_3 VREF_4

2+VIN

5TRIM

VOUT

GND

ADR445ARMZ

2+VIN

GND

TRIM

7COMP

VOUT

ADR431BRZ

REF3

REF4

REF1

REF2

+5VREF+2_5VREF +4_096VREF

VDD VDD

+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

VDD

14528-008

Figure 6. EVAL-MBnanoDAC-SDZ 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

5 6

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

14528-009

Figure 7. EVAL-MBnanoDAC-SDZ 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

–

13 14

U10-D

AD8608ARUZ

2–

U7-A

AD8616ARZ

6–

U7-B

AD8616ARZ

V+

V–

U7-C AD8616ARZ

2–

3+6

V–

V+

U11

AD8655

2–

3+6

V–

V+

U12

AD8655

VOUT_0

VOUT_1

VOUT_2

VOUT_3

VOUT_4

VOUT_5

VOUT_6

VOUT_7

VDD

VSS

VDD

VSS

14528-010

Figure 8. EVAL-MBnanoDAC-SDZ Motherboard Output Amplifier Circuit

UG-989 EVAL-AD5680DBZ User Guide

Rev. 0 | Page 8 of 12

14528-011

Figure 9. EVAL-MBnanoDAC-SDZ Motherboard Component Placement

14528-012

Figure 10. EVAL-MBnanoDAC-SDZ Motherboard Top Side Routing

EVAL-AD5680DBZ User Guide UG-989

Rev. 0 | Page 9 of 12

14528-013

Figure 11. EVAL-MBnanoDAC-SDZ Motherboard Bottom Side Routing

EVAL-AD5680DBZ DAUGHTER BOARD

R1 DNP

VOUT

DNP

0.1µF

+C3

10µF

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

1 2

3 4

5 6

7 8

910

11 12

13 14

15 16

VDD

VREF

VFB

VOUT

5SYNC

6SCLK

7DIN

8GND

AD5680BRJZ

VOUT_0

VREF1

SYNC

SCLK

SDIN

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

CS WR

DB11 DB5

DB10 DB4

AGND

14528-014

Figure 12. EVAL-AD5680DBZ Daughter Board Schematics

14528-015

Figure 13. EVAL-AD5680DBZ Daughter Board Component Placement

UG-989 EVAL-AD5680DBZ User Guide

Rev. 0 | Page 10 of 12

14528-016

Figure 14. EVAL-AD5680DBZ Daughter Board Top Side Routing

14528-017

Figure 15. EVAL-AD5680DBZ Daughter Board Bottom Side Routing

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