Analog Devices EVAL-AD8460SDZ Manual de usuario

Evaluation Board User Guide

AD8460

Evaluating the AD8460 High Power, High Speed Arbitrary Waveform Driver

Rev.0

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Features

•Enables easy evaluation of the AD8460

•Easy connection to any controller board

•Robust thermal management

Applications

•Automatic test equipment (ATE)

•Display panel formation and testing

•Piezo drivers

•Programmable power supplies

Evaluation Kit Contents

•EVAL-AD8460SDZ evaluation board

•Aluminum heat sink

•Tubeaxial fan

Hardware and Software Required

•SDP-H1 or SDP-B controller board, must be

purchased separately

•ACE software

•EVAL-AD8460SDZ ACE plugin

General Description

This user guide describes the EVAL-AD8460SDZ board,

which evaluates the AD8460 offered in a 12 mm × 12 mm,

80-lead thin quad flat package (TQFP) with an exposed

pad at the top for a mountable heat sink. The evaluation

board provides a platform for quick and easy evaluation of

the AD8460 for various user-defined configurations.

The AD8460 is ideally suited for demanding applications

such as high-speed arbitrary waveform generation,

programmable power supplies, and LCD/OLED panel

formation.

The evaluation board hardware and software enable full

operation of the AD8460 analog pattern generation (APG)

and arbitrary waveform generation (AWG) modes. The

AD8460 data sheet provides the full specifications of the

AD8460 and details on the device operation. Consult it in

conjunction with the user guide.

Evaluation Board Photographs

Figure 1. Front of AD8460 Evaluation Board

Warning: This high voltage evaluation board contains

exposed metal carrying lethal voltages when under power.

Take all necessary steps to protect users during operation.

For full precautions when using this high voltage

evaluation board, see the High Voltage Evaluation Board

section.

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Initial Setup

The complete AD8460 evaluation system includes the AD8460 evaluation board, SDP board, and the AD8460 ACE plug-

in. Plug-ins are product-specific applications downloaded and run in the analysis/control/evaluation (ACE) software

environment. The AD8460 evaluation board communicates with Microsoft Windows 10 and ACE software through the

SDP board. The AD8460 evaluation board and SDP controller boards are ordered separately. There are two types of

SDP boards that can interface with the AD8460 evaluation board: SDP-B and SDP-H1.

Figure 2. SDP-B Controller Board

Figure 3. SDP-H1 Controller Board

The SDP-B board (Figure 2) has the SDP 120-pin connectors only and enables the evaluation of the APG mode (data

inputs through SPI). The board comes populated for this configuration. Connect CON A/J2 of the SDP-B board to the

AD8460 evaluation board’s 120-pin connector P6.

The SDP-H1 board (Figure 3) has both the SDP 120-pin connector at the bottom and high-speed FMC connector on the

top. It enables the evaluation of both the APG and AWG modes (data inputs through parallel data bits). Connect the SDP-

H1 board to the AD8460 evaluation board’s FMC connector P7.

Table 1 below shows the AD8460 input mode vs. SDP controller board.

TABLE 1. AD8460 INPUT MODE VS. SDP CONTROLLER BOARD

SDP Board Model

APG Mode

AWG Mode

SDP-B

YES

SDP-H1

YES

See the Additional Resources section for more information on the SDP boards. Refer to the AD8460 data sheet for more

information on the APG and AWG input modes.

Alternatively, the 6-pin header P4 allows evaluation of the APG mode using a customized microcontroller.

002

003

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Evaluation Board Software Installation

1. Download the ACE installer software from www.analog.com/ace.

2. Install the ACE application and any other recommendations like SDP drivers.

Note: This might require a system reboot at the end. So, save any open files and close any other running applications

beforehand.

3. Open the ACE platform. A successfully installed ACE application displays a list of preinstalled plugins of released

ADI products.

Note: Reinstall the software if unable to see existing plugins.

4. Install Board.AD8460 through the plugin manager in the ACE toolbar. Go to Start and locate the AD8460 plugin

in the list of installed ACE plugins.

Figure 4. Plugin Available Through ACE Plugin Manager

Updating Installed Plugins

If an earlier version of the AD8460 plugin is already installed, update to the newest version by following these steps.

1. Go to Plugin Manager and select Available Updates.

2. Select Board.AD8460 and click Update Selected.

Configuring Hardware

To configure and test the AD8460 evaluation board, the following equipment is recommended:

oN6705B power supply or equivalent

o34401A DMM or equivalent

o33250A function generator or equivalent

oOscilloscope, Tektronix DPO 3014 or equivalent

o10-8109 Silicone heat sink compound or equivalent

oSystem development platform (H1 or B)

oTorque screwdriver

oKapton tape

1. Confirm the jumpers are in the factory default positions, as shown in Figure 5.

a. Connect VMID to GND through the VMID 2-pin header.

b. Connect AVDD to DVDD through the P2 2-pin header.

c. Connect VCC_5V to VREF5V through the VREF_5V 3-pin header.

d. Connect REF_IO to GND with a 0.1 µF capacitor through the REF_IO 3 pin header.

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Figure 5. AD8460 Evaluation Board Factory Default Jumper Position

2. Spread a thin layer of low-impedance thermal compound about 1 ml thick on top of the AD8460. Apply Kapton tape to the

edges of the heatsink, as seen in Figure 6, to not touch the AD8460. This is to prevent the heatsink from contacting some

surface mount components, located under the heatsink from becoming shorted, that creates unwanted connections. The

heatsink is black anodized. However, black anodize can scratch easily, exposing aluminum as a good conductor.

Figure 6. Back of Heatsink with Kapton Tape

005

035

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3. Mount the heat sink and secure four screws (PN 9902) onto the board with four hex nuts (PN HNSS440), as shownin Figure

7. Use a torque screwdriver to alternatively tighten the four screws, alternating diagonally like tightening lug nuts on a car tire,

to 6 in-oz on each.

Figure 7. AD8460 Evaluation Board with Heat Sink

4. Secure the four fan standoffs (PN 2114-440-AL) onto the board with four screws (PN 9900) from the bottom of the board, as

seen in Figure 8.

Figure 8. AD8460 Evaluation Board with Fan Standoffs Attached

006

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5. Use four screws (PN 010440CD125) to secure the fan ontothe standoffs. Then, attach the black wire of the fanto FAN_GND

and attach the red wire of the fan to FAN_VCC of the female connector P11. See Figure 11.

Figure 9. AD8460 Evaluation Board with Fan Attached

6. Secure the four plastic standoffs (PN 1902C) to the back of the board with four plastic screws (PN NY PMS 440

0025 PH), as seen in Figure 10.

Figure 10. Back of Evaluation Board with Plastic Standoffs

FAN CONNECTION

008

036

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7. A load capacitor can be installed on the board at C8, or an off-board load may be connected through the OUT_RES test

point. Use caution when driving a load that the AD8460 does not exceed its maximum allowable temperature of 150°C.

8. Connect the high voltage supply through VEE_HV, VCC_HV, and GND test points. Make sure that the GND test point is

connected first before attaching VEE_HV and VCC_HV. The recommended high voltage supplies are −50 V for VEE_HV

and +50 V for VCC_HV. Make sure power connections are secure before turning on the power supplies to avoid damaging

the board.

9. Connect a 5 V supply to the VCC_5V test point. Make sure the GND connection is connected first.

10. Connect a 12 V supply to FAN_VCC and set the 12 V supply to have a current limit of 100 mA.

11. Turn on the supplies at the same time. If all supplies cannot be turned on simultaneously, turn on the HV supplies first, then

the 5 V supply.

12. Check the supply currents. Under normal operation, the VEE_HV and VCC_HV current should be ~18 mA to 23 mA. The 5

V digital supply current should be ~10 mA to 20 mA, with the default state of the DAC being off.

TABLE 2. POWER SUPLLY LIMITS

Supply

Expected Value

VCC_HV

18 mA to 23 mA

VEE_HV

−18 mA to −23 mA

VCC_5V (DAC Off)

10 mA to 20 mA

VCC_5V (DAC On)*

37 mA to 47 mA

TMP

1.7 V to 2.2 V

13. Turn off the supplies.

14. Mate the SDP-H1 board to the AD8460 board through P6, the 120- pin connector at the bottom side of the AD8460 board,

if using APG mode only. For a more secure connection, screw the boards together through the connectors’ mounting holes.

Figure 11. AD8460 and SDP Board Connected to P6 at the Bottom

If AWG mode is also used, connection is through the FMC connector P7.

HV SUPPLIES

009

SYNC CONNECTION

USB CONNECTION

SDP POWER CONNECTION

FAN VCC

SDP CONNECTOR TOP SIDE

5V SUPPLY

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Figure 12. AD8460 and SDP Board Connected to P7 on the Top

15. Connect and plug in the SDP-H1 board power adapter.

16. Connect the SDP-H1 board to the host computer with the USB cable.

17. Turn on the supplies and apply the SYNC clock (3 Vpp, 20 kHz square wave signal centered at 1.5 V) through SYNC_01

test point or SYNC_IN SMB connector using an external function generation. Make sure your function generator is set to

High Z.

18. Run the ACE application. The AD8460 Board plugin for P6-connected board or the AD8460 FMC Eval Board plugin for P-

7 connected board appears in the attached hardware section of the Start tab. Refer to item 1 in the Known Issues section

if the board does not appear under the attached hardware section.

Figure 13. AD8460 Plugin Start Tab for SDP Connected Board

FMC CONNECTOR TOP SIDE

010

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Figure 14. Successful Connection Indicator for FMC Connected Board

19. Double-click the plugin to open the board view. A successful hardware connection is indicated by a green indicator in the

AD8460 Board or AD8460 FMC Eval Board tab.

Figure 15. AD8460 Board View for SDP Connected Board

Figure 16. Successful Connection Indicator for FMC Connected Board

20. The AD8460 main functions are labeled in the Block Diagram View or Chip View. This view can be accessed by double-

clicking the AD8460 symbol in the board view. This view provides a basic representation of the board’s functionality.

012

013

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Figure 17. AD8460 ACE Plugin Board View

Block Diagram and Description

This section describes the main functions of the block diagram. The AD8640 data sheet gives a full description of each

DAC and Input Mode Switch

This block allows to select the input of the MUX and sleep/wake the DAC. Select arbitrary waveform generation (AWG)

or analog pattern generation (APG).

Output Voltage Levels

In the APG mode, a pattern of up to 16 discrete DC voltage levels can be loaded serially into the memory through the

SPI. The pattern depth parameter indicates the number of levels the AD8460 reads from the memory to create a repeating

pattern.

Sleep/Wake

This button toggles the AD8460 in and out of SLEEP mode.

Shutdown Indicator

This button and LED indicator light up green in normal operation and red when the part goes into shutdown.

Shutdown Reset

After a shutdown event due to a fault condition, reset the shutdown feature to turn the AD8460 back on. This button resets

the shutdown feature by writing a 1 and then a 0 to bit[7] of 0x00.

Protection Panel

This panel allows to enable individually parameter protection. To enable protection for a given fault type, click the

corresponding Enable Protection checkbox. Each fault type is mapped to an indicator on the GUI. Also specify the

corresponding thresholds in Desired Value fields to trigger an alarm and shut down the high voltage driver. To clear

alarms, make sure the fault event is gone, and the part’s shutdown feature is reset. Click Clear All Alarms to clear the

alarm registers and indicators.

015

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