Intersil ISL76534EVAL1Z Manuale utente

ISL76534EVAL1Z Evaluation Board User Guide

Description

The ISL76534EVAL1Z is a complete platform for the

evaluation on all datasheet specifications and functionalities

of the programmable gamma buffer. The ISL76534 contains an

I2C programmable, 10-bit, 14-channel gamma reference

voltage generator with buffered outputs, a 10-bit programmable

VCOM calibrator, a high output current VCOM amplifier and an

internal EEPROM to store all reference voltage data. The

EEPROM features an endurance of 10,000 write cycles and a

data retention of 20yrs at 105°C.

The ISL76534EVAL1Z board is intended to provide an

evaluation platform for the 4mmx5mm X2QFN ISL76534

package, programmable gamma buffer.

Specifications

• Ambient temperature range, -40°C to +105°C

• Analog supply voltage, AVDD = 6.3V to 19V

• Digital supply voltage, DVDD = 2.25 to 3.6V

• Output channels x14, OUTx = 0V to AVDD-Headroom

•Outputchannelx1,V

COM = 0V to AVDD-Headroom

References

•ISL76534 datasheet

Features

• 15-Channel reference voltage outputs, I2C programmable:

- 14-channel gamma references, 10-bit resolution with

buffered outputs

- 1-channel VCOM calibrator with 10-bit resolution

• High output current VCOM amplifier

• Ultra-low power operation, ideal for tablet and mobile

applications: typical quiescent power, 12mW at 8V AVDD

• EEPROM data retention: 20yrs at 105°C

• EEPROM endurance: 10,000 write cycles

- Read/write capable over 2.25V to 3.6V DVDD range

• 6.3V to 19V analog supply operating range

• 2.25V to 3.6V digital supply operating range

• 28 Ld 4x5mm super thin X2QFN package

• Pb-free (RoHS compliant)

•AEC-Q100 qualified

Ordering Information

PART # DESCRIPTION

ISL76534EVAL1Z Evaluation board for the 4x5 X2QFN package

FIGURE 1. ISL76534EVAL1Z TOP VIEW FIGURE 2. ISL76534EVAL1Z BOTTOM VIEW

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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners.

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FIGURE 3. BLOCK DIAGRAM

SCL

SDA

AVDD DVDD

I2C

INTERFACE

ANALOG

POWER

SUPPLY

DIGITAL

POWER

SUPPLY

REFIN

RAM

14x10

CONTROL

BYTE

EEPROM

VCOM DAC

GND

DAC15

GND

REFIN

WP: ACTIVE LOW

OUT1

OUT2

VCOM AMPLIFIER

DAC1

DAC2

OUT3

10 DAC3

OUT4

OUT5

DAC4

DAC5

OUT6

10 DAC6

OUT7

OUT8

DAC7

DAC8

OUT9

10 DAC9

OUT10

OUT11

DAC10

DAC11

OUT12

10 DAC12

OUT13

OUT14

DAC13

DAC14

GND

OUTCOM

INN_COM

DAC/OUTx

BUFFER

AVDD_AMP

GND

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What Is Inside

The evaluation kit contains:

• ISL76534EVAL1Z board

•TheISL76534 datasheet

• This ISL76534EVAL1Z user guide

• ISLUSBMINIZEVAL1Z (USB to I2C module)

What Is Needed

The following instruments will be needed to perform testing:

• Power supplies:

-PS1:DC20V/5A,(betweenA

VDD and AVDD_AMP and GND)

-PS2:DC20V/5A,(betweenD

VDD and GND)

•Multimeters

• Oscilloscope

• Cables and wires

Initial Set-Up

This user guide describes how to set up and use the

ISL76534EVAL1Z evaluation board along with the

ISLUSBMINIZEVAL1Z in a standalone configuration. It explains

how to install the software and how to use the Windows interface

to read and write to the ISL76534 data register and EEPROM.

Evaluation Software

The next section explains how to install the Graphical User

Interface (GUI) software, which is used to configure the ISL76534

data registers and EEPROM.

Notes

The GUI software was developed on a 64-bit Windows 8 platform.

Because the GUI software registers as a Human Interface Device

(HID) and uses standard HID calls, it should also work on other

XP or later Windows operating systems (32-bit and 64-bit),

including Windows 7.

This user guide contains screenshots of the GUI at the time this

user guide was written. Subsequent GUI versions may appear

differently.

FIGURE 4. EXTERNAL CONNECTIONS AND JUMPERS

USB FROM

PC/LAPTOP

PLUG IN USB

MODULE TO POWER

SUPPLY 1

POWER

SUPPLY 2

DIGITAL

MULTIMETER (V)

OSCILLOSCOPE TO TIME

TO VBAT

BOARD

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Software Installation Guide

The ISL76534EVAL1Z software can be installed from an installer

file downloaded from the ISL76534 product information page on

the Intersil web site.

Launch the “isl76534_installer.exe” file and follow the

instructions (Figure 5). The default installation adds an “Intersil”

directory to the “Start Menu\Programs” tree. That directory will

contain a shortcut to the ISL76534 executable, and an

uninstaller.

The default install option places the main program files in the

C:\Program Files\Intersil\ISL76534 directory; however, the

location can be customized, if desired.

Click Next to continue to the license agreement (Figure 5).

Read the license agreement, choose to accept (or not accept) the

license agreement, then click Next. The Select Destination

Location window opens (Figure 6).

To use a directory different from the default location, click the

Browse button. Click Next to continue to the Select Start Menu

Folder screen (Figure 7).

Click Next to create the Intersil folder in the Start menu. The

Ready to Install window opens (Figure 8).

Click Install to copy all the necessary files to the PC. Installation

is now complete. Reboot the PC if requested.

Hardware Set-up Guide

Initial Board Jumper Positioning

JP1 -Is used to set the logic level of the Write Protection pin WP.

Shorting JP1-1 and -2 grounds the WP and prevents I2C data

write to the internal DAC registers. This is the default if the pin is

left floating. Shorting JP1-2 and -3 provides a high on the WP and

thereby allows a data write to the internal DAC registers. Note the

pin has an internal pull down to GND.

JP2 -This pin determines the 7-bit I2C device address. Shorting

JP1-1 and -2 grounds the A0 and sets it to low which equates to a

device address of 0x74. This is the default setting if the pin is left

floating. Shorting JP1-2 and -3 provides a high on the A0, which

sets the I2C address to 0x75 (pulled up externally). Note that the

pin has an internal pull down to GND.

After the software is installed, the evaluation board is ready to be

interfaced through the PC.

FIGURE 5. LICENSE AGREEMENT



FIGURE 6. SELECT DESTINATION LOCATION



FIGURE 7. SELECT START MENU FOLDER



FIGURE 8. BEGIN INSTALLATION



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1. Verify that the WP0 on JP1 is tied high if you wish to write to

the device register/EEPROM.

2. Using jumper JP2 tie A0 = LOW for an I2C address of 0x74 OR

A0 = HIGH for an I2C address of 0x75.

3. Connect the power supply ground(s) to the GND posts TP13

and TP14.

4. Apply 15V (range = 4.5V to 19V) to the AVDD and AVDD_AMP

analog supply posts TP8 and TP9.

5. Apply digital supply (2.25 to 3.6V) to the VDD post TP10.

6. Verify that the correct voltage is present across the power

supply pins and that the board is drawing reasonable current.

To verify at AVDD = 15V and DVDD = 3.3V, IAVDD is about

1.9mA (typical) and IDD is about 160μA (typical).

7. Connect the evaluation board to the PC with a USB cable.

USB Module Installation

When the ISLUSBMINIZEVAL1Z USB module is initially connected

to the PC, Windows may display the Found New Hardware pop-up

message.

This message means the USB module is registering itself as an

HID on your computer. The process should complete within a few

seconds.

On XP systems, a pop-up message may appear, displaying the

status of the USB module hardware.

If a Found New Hardware window appears asking for the location

of device drivers, please contact Intersil for a new USB module.

Using the Software GUI

Launch the software from the default location:

Start Menu\Programs\Intersil\ISL76534

After the program launches, you should see the screen shown in

Figure 9.

8. Set Display = HEX

9. AVDD = 15V (Actual voltage setting on the AVDD supply).

10. REF_IN = 14.75V (REF_IN is divided down to this value from

AVDD on the evaluation board).

11. Set the appropriate I2C address on the GUI and click OK.

12. Choose Zero Fill to write 0x00 to all registers.

13. Choose 3FF Fill to write 0x3FF to all the registers.

14. Choose Custom Fill to write a user defined value to all the

registers after entering the value in the Custom Value input

box. The data sliders can also be used to vary individual

15. Probe the OUT1 to OUT14 and read the programmed voltage

level based on the data written to the registers or EEPROM.

16. Probe the VCOM node and verify that it outputs the

programmed voltage level based on the data written to the

registers or EEPROM.

17. Turn off all supplies and disconnect the USB interface from

the PC.

FIGURE 9. EVALUATION SOFTWARE WINDOW

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Evaluation Software Troubleshooting

Verify that I2C signals can be detected on the SDA and SCL pins.

If they cannot, check the connection between the evaluation

board and the USB module. When trying to run the ISL76534

evaluation software, the occurrence of: “Run-time error number

'429': Active X component can't create object” means that your

computer does not have a sufficiently updated copy of

Microsoft.NET Framework. Microsoft.NET Framework can be

downloaded from the Microsoft web site at:

http://www.microsoft.com/net/download.aspx. Any version

from 2.0 and higher will work.

USB Driver Troubleshooting

The evaluation board software should be able to communicate

with the evaluation board as soon as it is launched. If there is a

communication problem, the dialog box shown in Figure 10 is

displayed. Click Retry to attempt to reconnect, or click Cancel to

exit the application.

After rebooting the PC, verify that the following files are in the

following locations:

• ISL76534.exe in C:\Program Files\Intersil\ISL76534

• isilhid.dll in C:\Program Files\Intersil\ISL76534

If the dialog shown in Figure 10 persists, open the Windows

Control Panel. Double-click the System icon, select the Hardware

tab, and then click Device Manager. The Device Manager window

shown in Figure 11 opens.

Click Human Interface Devices to expand the folder. You should

see HID-compliant Device and an extra USB Human Interface

Device subcategory when the USB module is plugged in. This

indicates the driver is properly installed and is communicating

with the evaluation board.

To verify that the new entries are actually the USB module,

right-click on HID-compliant Device and in the drop-down menu,

click Properties. The HID-compliant device Properties window

opens (Figure 12). Click the Details tab. In the text window, you

should see a string, “HID\VID_09AA and PID_2019”

corresponding to the Vendor ID and Product ID of the USB

module. The Vendor ID = 0x09AA, and the Product ID = 0x2019.

FIGURE 10. DEVICE NOT CONNECTED



FIGURE 11. DEVICE MANAGER WINDOW



FIGURE 12. VERIFY VID = 09AA&PID = 2019



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If the Vendor ID and Product ID are not visible, or if there are any

error messages, try the following actions:

• Verify that the evaluation board has power and that the USB

cable is connecting the evaluation board and the PC.

• Disconnect and then reconnect the USB cable. You should hear

two tones from the PC speakers when the USB device is

enumerated.

• Cycle the power to the board.

• Close all instances of the ISL76534 application and restart the

software. Restart the PC if necessary.

• If none of this works, try installing the software on a different

PC to isolate the cause to the PC versus the evaluation board.

PCB Layout Recommendations

Good Printed Circuit Board (PCB) layout is necessary for optimum

performance. The following are recommendations to achieve

optimum high frequency performance from your PCB.

• To optimize thermal performance, solder the ISL76534’s

exposed thermal pad to GND. PCB vias should be placed below

the device’s exposed thermal pad and connected to GND to

transfer heat away from the device (see “General PowerPAD

Design Considerations” in the ISL76534 datasheet). If the

thermal pad is not connected to GND then it should be

electrically isolated.

• Maximize use of AC decoupled PCB layers. All signal I/O lines

should be routed over continuous ground planes (i.e., no split

planes or PCB gaps under these lines). Avoid vias in the signal

I/O lines.

• When testing, use good quality connectors and cables, match

cable types and keep cable lengths to a minimum.

• A minimum of two power supply decoupling capacitors are

recommended (typically 4.7µF and 0.1µF) per supply and

placed as close to the IC as possible. Avoid placing vias

between the capacitor and the device because vias add

unwanted inductance. Larger value capacitors can be placed

farther away (see “PCB Layouts”starting on page 11).

For optimal thermal performance, use vias to distribute heat

away from the IC and to a system power plane. Fill the thermal

pad area with vias that are spaced 3x their radius (typically),

center-to-center, from each other. The via diameters should be

kept small, but they should be large enough to allow solder

wicking during reflow. To optimize heat transfer efficiency, do not

connect vias using “thermal relief” patterns. Vias should be

directly connected to the plane with plated through-holes.

Connect all vias to the correct voltage potential (power plane)

indicated in the datasheet. For the ISL76534, the thermal pad

potential is ground (GND).

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Schematic

FIGURE 13. SCHEMATIC

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FIGURE 14. SCHEMATIC (Continued)

Schematic (Continued)

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Bill of Materials

QTY UNITS REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER PART NUMBER

1 ea. J4 (Do Not Populate), FOUR PIN FRICTION LOCK

ASSEMBLY

MOLEX 22-11-2042

5 ea. TP2, TP3, TP8-TP10 Miniature Red Test Point 0.100 Pad 0.040 Thole KEYSTONE 5000

4 ea. TP11-TP14 Miniature Black Test Point 0.100 Pad 0.040 Thole KEYSTONE 5001

5 ea. TP1, TP4-TP7 Miniature White Test Point 0.100 Pad 0.040 Thole KEYSTONE 5002

1 ea. D1 30V 200mA 200mW SCHOTTKY DIODE Diodes Inc BAT42W-7-F

3 ea. C9-C11 4.7µF, 35V, 10%, Ceramic Cap, X7R TDK CGA4J1X7R1V475K125AE

5 ea. C3-C5, C7, C8 0.1µF, 50V, 10% Multilayer Cap GENERIC H1045-00104-50V10

31 ea. C1, C2, C6, C12-C39 (Do Not Populate), Multilayer Cap GENERIC H1045-OPEN

34 ea. R1, R5-R7, R15, R21-R31,

R37-R46, R51-R58

(Do Not Populate), Metal Film Chip Resistor GENERIC H2505-DNP-DNP-1

22 ea. R2, R8-R13, R16-R20, R32-R36,

R47-R50, R59

(Do Not Populate), Thick Film Chip Resistor GENERIC H2511-00R00-1/16W1

1ea. R14 1kΩ,1%, 62.5mW, Thick Film Chip Resistor GENERIC H2511-01001-1/16W1

1 ea. U1 15Ch Programmable Gamma Buffer INTERSIL ISL76534ARXZ

2 ea. JP1, JP2 Three Pin Jumper GENERIC JUMPER-3-100

1 ea. J1 10/20 Pin Dual Row Header 0.5x0.5 HARWIN M50-3901042

1ea. R4 22kΩ, 1%, 62.5mW, Thick Film Chip Resistor Rohm MCR03ERTF2202

1ea. R3 330Ω, 1%, 62.5mW, Thick Film Chip Resistor Rohm MCR03ERTF3300

1 ea. J2 6 Pin Male Right Angle Header 2.54mmx2.54mm

(0.100)

SAMTEC TSW-103-08-T-D-RA

1 ea. J3 40 Pin Header 2.54mmx2.54mm (0.100) SAMTEC TSW-40

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