Analog Devices EVAL-AD5423SDZ Manuel utilisateur

EVAL-AD5423SDZ Evaluation Board User Guide

UG-1554

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

Evaluating the AD5423 Single Channel, 16-Bit Current or Voltage Output DAC with

HART Connectivity

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 19

FEATURES

Fully featured evaluation board for the AD5423

On board 2.5 V ADR4525 reference

ACE software for control

EVALUATION KIT CONTENTS

EVAL-AD5423SDZ evaluation board

EQUIPMENT NEEDED

SDP-S controller board

Bench top power supply and connector cables

PC/laptop

DOCUMENTS NEEDED

AD5423 data sheet

ACE user manual

SOFTWARE NEEDED

ACE software

GENERAL DESCRIPTION

This user guide describes the EVAL-AD5423SDZ evaluation

board for the AD5423 single-channel, 16-bit voltage, 16-bit

current output digital-to-analog converter (DAC).

The EVAL-AD5423SDZ (see Figure 1) requires the EVAL-SDP-

CS1Z system demonstration platform (SDP-S) board. The

EVAL-AD5423SDZ interfaces to the USB port of the PC via the

SDP-S board. The Analysis, Control, Evaluation (ACE) software

allows simplified programming of the AD5423, and is available

to use with the EVAL-AD5423SDZ.

For full details on the AD5423, see the AD5423 data sheet.

Consult the data sheet in conjunction with this user guide when

using the EVAL-AD5423SDZ.

EVALUATION BOARD PHOTOGRAPH

20450-001

Figure 1.

UG-1554 EVAL-AD5423SDZ Evaluation Board User Guide

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TABLE OF CONTENTS

Features .............................................................................................. 1

Evaluation Kit Contents................................................................... 1

Equipment Needed........................................................................... 1

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

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

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

Evaluation Board Photograph......................................................... 1

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

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

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

Serial Communication................................................................. 3

AD5423 Device Address Pins ..................................................... 3

Software Quick Start Procedures.................................................... 5

Installing the ACE Software and EVAL-AD5423SDZ Plugins

......................................................................................................... 5

Initial Setup ....................................................................................5

AD5423 Block Diagram and Functions .........................................7

Initial Configuration.....................................................................9

Setting the DAC Output...............................................................9

Writing to the ADC Configuration Register .......................... 10

Updating Diagnostic Results .................................................... 10

Example Sequences .................................................................... 10

ACE Tool Views.............................................................................. 12

Macro Tool .................................................................................. 12

Events Tool .................................................................................. 12

Evaluation Board Schematics and Artwork................................ 13

Ordering Information.................................................................... 18

Bill of Materials........................................................................... 18

REVISION HISTORY

5/2019—Revision 0: Initial Version

EVAL-AD5423SDZ Evaluation Board User Guide UG-1554

Rev. 0 | Page 3 of 19

EVALUATION BOARD HARDWARE

POWER SUPPLIES

The EVAL-AD5423SDZ requires a number of power supply

inputs for the AVDD1, AVDD2, AVSS, and VLOGIC pins on the AD5423.

If there is only one positive rail available, connect the AVDD2 pin

to the AVDD1 pin via the AVDD1-AVDD2-SHRT link on the EVAL-

AD5423SDZ. The VLOGIC supply can be selected from 3.3V_SDP

on the SDP-S board or VLDO, through the JP1 and JP3 jumpers.

See Table 1 for more link options and the default link positions.

EVAL-AD5423SDZ operates with a power supply range from

−33 V on AVSS to +33 V on AVDD1 with a maximum voltage of

50 V between the two rails. AVDD2 requires a voltage between

5 V and 33 V. In a typical operating condition, AVDD2 = 5 V,

AVDD1 = +24 V, and AVSS = −24 V.

SERIAL COMMUNICATION

The SDP-S board handles the communication to the EVAL-

AD5423SDZ via the PC. By default, the SDP-S board handles

the serial port interface (SPI) communication, controls the

RESET pin and the LDAC pin, and monitors the FAULT pin of

the AD5423.

The EVAL-AD5423SDZ can disconnect from the SDP-S board

and drive the digital signals from an external source by

removing the appropriate links on P2 (see Table 2). An option

to tie the RESET pin and the LDAC pin to high or low levels is

available through the S1 switch and the JP11 link.

AD5423 DEVICE ADDRESS PINS

The device address pins (AD0 and AD1) are used in conjunction

with the device address bits within the SPI frame to determine

which AD5423 device is being addressed by the system controller.

The AD0 pin and the AD1 pin can be configured through the

JP12 and JP14 links (see Table 1).

Table 1. EVAL-AD5423SDZ Link Option Functions

Link Default Position Function

AVDD1-AVDD2-SHRT Not inserted Connects the AVDD2 pin to the AVDD1 pin.

JP1 Not inserted Selects 3.3 V from the SDP-S as the source for the VLOGIC pin.

JP2 Inserted Selects the external reference ADR-REF as the input to REFIN.

JP3 Inserted Selects 3.3 V from the VLDO pin of the AD5423 as the source for the VLOGIC pin.

JP4 Not inserted Selects the REFOUT pin as the input to the REFIN pin.

JP5 Inserted Powers external reference ADR-REF from the AVDD2 pin (the maximum supply for the ADR4525 is 15 V).

JP8 Inserted Connects the VIOUT pin to the + VSENSE pin.

JP10 Inserted Connects the –VSENSE pin to the RETURN signal on the EVAL-AD5423SDZ.

JP11 A

Position A connects the LDAC pin to the ground position. Position B connects LDAC to the VLOGIC pin.

JP12 A

Position A connects the AD0 pin to the ground position. Position B connects the AD0 pin to the

VLOGIC pin.

JP14 A

Position A connects the AD1 pin to the ground position. Position B connects the AD1 pin to the

VLOGIC pin.

JP17 Not inserted Connects the AVSS pin to the ground position pin for the unipolar supply option (current output only).

P2 Inserted

Provides options to disconnect from the SDP-S board and to drive digital signals from an

external source.

S1 Up

In the up position, this link connects the RESET pin to the VLOGIC pin.

Middle (default)

In the middle position (default), this link controls the RESET pin via the SDP-S board.

Down

In the right position, this link connects the RESET pin to the ground position pin.

UG-1554 EVAL-AD5423SDZ Evaluation Board User Guide

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Table 2. Link Options for P2 Header

Pin No. Position Function

1, 2 Inserted Connects the FAULT signal from the SDP-S to the FAULT pin on the AD5423.

Not inserted Disconnects the FAULT signal from the SDP-S to the FAULT pin on the AD5423.

3, 4 Inserted Connects the RESET signal from the SDP-S to the RESET pin on the AD5423.

Not inserted Disconnects the RESET signal from the SDP-S to the RESET pin on the AD5423.

5, 6 Inserted Connects the LDAC signal from the SDP-S to the LDAC pin on the AD5423.

Not inserted Disconnects the LDAC signal from the SDP-S to the LDAC pin on the AD5423.

7, 8 Inserted Connects the SCLK signal from the SDP-S to the SCLK pin on the AD5423.

Not inserted Disconnects the SCLK signal from the SDP-S to the SCLK pin on the AD5423.

9, 10 Inserted Connects the SDO signal from the SDP-S to the SDO pin on the AD5423.

Not inserted Disconnects the SDO signal from the SDP-S to the SDO pin on the AD5423.

11, 12 Inserted Connects the SDI signal from the SDP-S to the SDI pin on the AD5423.

Not inserted Disconnects the SDI signal from the SDP-S to the SDI pin on the AD5423.

13, 14 Inserted Connects the SYNC signal from the SDP-S to the SYNC pin on the AD5423.

Not inserted Disconnects the SYNC signal from the SDP-S to the SYNC pin on the AD5423.

EVAL-AD5423SDZ Evaluation Board User Guide UG-1554

Rev. 0 | Page 5 of 19

SOFTWARE QUICK START PROCEDURES

INSTALLING THE ACE SOFTWARE AND

EVAL-AD5423SDZ PLUGINS

The EVAL-AD5423SDZ board uses Analog Devices, Inc., ACE

software. For instructions on how to install and use the ACE

software, go to www.analog.com/ACE.

When the installations are finished, the EVAL-AD5423SDZ

plugin will appear when you open the ACE software.

INITIAL SETUP

To set up the EVAL-AD5423SDZ, take the following steps:

1. Connect a USB cable to the PC and then to the SDP-S board.

2. Connect the SDP-S board to the EVAL-AD5423SDZ. The

PC recognizes the EVAL-AD5423SDZ.

3. Power up the EVAL-AD5423SDZ with the power supplies

recommended in the Power Supplies section.

4. Open the ACE software. The EVAL-AD5423 SDZ appears

in the Attached Hardware pane of the ACE window.

20450-002

Figure 2. EVAL-AD5423SDZ Plugin Not Installed

5. When setting up the evaluation board for the first time, it

can be required to install the EVAL-AD5423SDZ plugin. If

the plugin appears as shown in Figure 5, then proceed to

Step 7. If the plugin appears as shown in Figure 2, click on

the button circled in red and the pop-up window shown in

Figure 3 appears. Click Yes.

20450-003

Figure 3. Installing the Plugin Pop-Up Window

6. The plugin manager window appears, as shown in Figure 4.

7. Find and select the Board.AD5423 plugin and click Install

Selected. The EVAL-AD5423SDZ plugin is now installed

and displays as shown in Figure 5.

20450-004

Figure 4. Plugin Manager Window

UG-1554 EVAL-AD5423SDZ Evaluation Board User Guide

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20450-005

Figure 5. Attached Hardware Section with the EVAL-AD5423SDZ

Plugin Connected

8. Double-click EVAL-AD5423SDZ to open the AD5423 block

diagram (see Figure 6). The INITIAL CONFIGURATION

pane appears on the left side of the ACE window. Several

written to the device in the appropriate order. The RESET_

OCCURED and CAL_MEM_UNREFRESHED LED

indicators in the DIGITAL DIGNOSTIC RESULTS pane are

illuminated red by default.

9. Write the initial configuration values to clear these error

flags. If the device is power cycled, or if the USB cable is

disconnected and reconnected while the ACE software is

open, contact with the EVAL-AD5423SDZ is lost. To

regain contact, click the System tab, then click the USB

symbol on the EVAL-AD5423SDZ, and then click Acquire.

0450-006

Figure 6. AD5423 Block Diagram in the ACE Software

EVAL-AD5423SDZ Evaluation Board User Guide UG-1554

Rev. 0 | Page 7 of 19

AD5423 BLOCK DIAGRAM AND FUNCTIONS

The EVAL-AD5425SDZ plugin is organized to appear similar to

the block diagram shown in the AD5423 data sheet. This graphical

user interface (GUI) correlates the functions of the EVAL-

AD5423SDZ with the descriptions in the AD5423 data sheet.

Full descriptions of each block and register setting are available

in the AD5423 data sheet. The full screen AD5423 block

diagram with labels is shown in Figure 7. Table 3 and Table 4

describe the functionality of each block.

20450-007

Figure 7. AD5423 Block Diagram with Labels

Table 3. AD5423 Block Diagram Label Functions (See Figure 7)

Figure

Label Function

A To apply any changes made to the block diagram or to register values in the memory map to the device, click Apply Changes.

B To read back all of the registers of the device, click Read All.

C Click Reset Chip to reset the AD5423. The Reset Chip button has the same functionality as the software reset of the AD5423.

D Click Diff to show the registers that are different from the data stored on the device. This function shows what has changed since

the last register read.

E Click Software Defaults to load the software defaults of the device. These values are not written to the hardware. Click Apply Changes

to write the software default values to the hardware.

F The AD0 and AD1 checkboxes set the AD5423 address of the device and must correspond to the JP12 and JP14 links on the

hardware. If either checkbox is selected, this represents a high state. If either box is not selected, this represents a low state.

G If the /RESET checkbox is selected, the SDP-S board sets the RESET pin high. Otherwise, the SDP-S board pulls the RESET pin low.

H If the /LDAC checkbox is selected, the SDP-S board sets the LDAC pin high. Otherwise, the SDP-S board pulls the LDAC pin low.

I The EVAL-AD5425SDZ plugin monitors the FAULT pin. If the FAULT pin is low, the /FAULT indicator LED lights up red.

K VI_OUT displays the calculated output at VIOUT, and displays if the output is in voltage, milliamps, or is high impedance (high-Z).

UG-1554 EVAL-AD5423SDZ Evaluation Board User Guide

Rev. 0 | Page 8 of 19

Figure

Label Function

Lx GUI access on several registers. Pop-ups, dropdown menus, and hexadecimal textboxes are available in the GUI to configure

several registers of the AD5423. To write the changes to the device, click Apply Changes. The functions within the GUI that

control various registers are described in Table 4.

M The Calibration Memory Refresh button initiates a write to the key register to perform a calibration memory refresh.

N The SW LDAC button initiates a write to the key register to perform a software LDAC command.

O The NOP Command button initiates a write to Address 0x00 for a no operation (NOP) command.

P The Configure ADC button writes the data selected in the ADC Config menu to the ADC configuration register.

Q Two Stage Readback Select menu. A two-stage readback is initiated through the two-stage readback select register. Click

Readback to initiate a write to the two-stage readback select register and issue a no operation command.

R DIGITAL DIAGNOSTIC RESULTS menu. Click Update and Readback Digital Diagnostic Result to trigger a write 1 to clear

operation on the selected checkboxes and a readback from the digital diagnostic result register.

S ANALOG DIAGNOSTIC RESULTS menu. Click Update and Readback Analog Diagnostic Result to trigger a write 1 to clear

operation on the selected checkboxes and a readback from the analog diagnostic result register.

T When the HART_EN checkbox is selected, the HART_EN bit = 1 in the General-Purpose Configuration 1 register.

U Click Proceed to Memory Map to open the AD5423 memory map (see Figure 8).

V Click Example Sequences to open the example sequences window (see Figure 13).

Table 4. Register Controls Accessible via the GUI (See Label Lx in Table 3 and in Figure 7)

Figure

Label Function

L1 Diagnostic Configuration. Click this button to activate the associated pop-up menu.

L2 GP Config. When this button is clicked, a pop-up menu appears to configure the general-purpose configuration registers.

L3 Key register menu. When this menu is clicked, a dropdown menu appears to configure the key register.

L4 Fault Pin Config. When this button is clicked, a pop-up menu appears to configure the general-purpose configuration registers.

L5 WDT Config. When this button is clicked, a pop-up menu appears to configure the general-purpose configuration registers.

L6 Frequency Monitor menu. This menu displays the value in the frequency monitor when read.

L7 Clear Code menu. Use the textbox in this menu to insert a clear code value in hexadecimal format.

L8 User Gain menu. Use the textbox in this menu to insert a user gain value in hexadecimal format.

L9 User Offset menu. Use the textbox in this menu to insert a user offset value in hexadecimal format.

L10 DAC Input Reg menu. Use the textbox in this menu to insert the DAC value in hexadecimal format.

L11 16 Bit DAC. When this button is clicked, a pop-up menu appears to configure the general-purpose configuration registers.

L12 DAC Output Reg. This menu displays the hexadecimal value currently set in the DAC output register.

L13 Status Register. This menu displays the contents of the status register.

L14 ADC Config. This menu contains a combination of dropdown menus and a textbox in which to enter the sequence data.

EVAL-AD5423SDZ Evaluation Board User Guide UG-1554

Rev. 0 | Page 9 of 19

0450-008

Figure 8. AD5423 Memory Map in the ACE Software

INITIAL CONFIGURATION

An initial configuration wizard is available when the AD5423

plugin opens that allows quick configuration of the AD5423, and

provides configuration for the clock output in the general-purpose

configuration register, the DAC configuration register, and the

DAC input register. Click Apply to initiate the configured settings

in the order of the recommended power-up sequence on the

AD5423 data sheet.

SETTING THE DAC OUTPUT

To configure the DAC output, use the DAC Config Register

pop-up menu (see Figure 9). Click the 16 Bit DAC block in the

block diagram to display the DAC configuration register. Select

the appropriate settings and click Apply Changes. It is

recommended to disable the output until the correct value in

the DAC input register is written to the device.

To change the DAC voltage or current output level, write the

appropriate hexadecimal code to the DAC input register, and

then click Apply Changes. Click SW LDAC to issue a software

LDAC command, or pull the LDAC pin low to update the DAC

output register with the values in the DAC input register. To

enable the DAC output, select the OUT_EN (Enable VI_OUT)

checkbox, and then click Apply Changes. The programmed

voltage or current is then reflected at the VIOUT pin.

20450-009

Figure 9. AD5423 DAC Config Register Pop-Up Menu

UG-1554 EVAL-AD5423SDZ Evaluation Board User Guide

Rev. 0 | Page 10 of 19

WRITING TO THE ADC CONFIGURATION REGISTER

The procedure to set up and configure the ADC input node is

discussed in the AD5423 data sheet. For this reason, writing to

the ADC configuration register through the Apply Changes

function is disabled.

The dropdown list in the SEQUENCE_COMMAND section

contains only an initiate single conversion command

(INITIATE_SINGLE_CON). The hexadecimal text box in the

SEQUENCE_DATA pane is unused and remains at 0. Use the

dropdown list in the ADC_IP_SELECT pane to select the desired

input node for the ADC to convert. Click Configure ADC to

initiate a write to the ADC configuration register. A register

read must be performed to see the ADC result in the status

20450-010

Figure 10. AD5423 ADC Configuration Register

UPDATING DIAGNOSTIC RESULTS

The AD5423 has a digital diagnostic results register and an

analog diagnostic results register that contain error flags for the

on-chip digital and analog diagnostic features. Write 1 to the

respective error flags update the error flag status.

To update the digital and analog diagnostic result registers, click

Update and Readback. This button initiates a write of 1 to the

selected checkboxes and then reads back the updated diagnostic

result. Figure 11 shows the digital diagnostic results register.

Figure 12 shows the analog diagnostic results register.

20450-011

Figure 11. AD5423 Digital Diagnostic Results Register

0450-012

Figure 12. AD5423 Analog Diagnostic Results Register

EXAMPLE SEQUENCES

There are several example sequences available. Click Example

Sequences and the window shown in Figure 13 opens. To

enable any of the sequences, click the relevant sequence button,

as shown in Figure 14. The sequence runs immediately and the

output changes accordingly. To return to the main window, click

Back to the AD5423.

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