MAX9694EVKIT_技术文档

19-4313; Rev 0; 10/08

MAX9694 Evaluation Kit

Evluates:MAX694

General Description

Features

The MAX9694 evaluation kit (EV kit) demonstrates the

MAX9694 reference voltage generator for gamma cor-

rection in TFT-LCD panels, such as those found in high-

resolution TVs, high-end monitors, or for general

industrial reference voltage generation. The MAX9694

EV kit provides 14 programmable reference voltage

outputs (DAC outputs), four static buffered reference

voltage outputs (reference outputs), and a 7-bit digital

o 14 8-Bit Programmable Reference Voltages (DAC

Outputs)

o Four Static Buffered Reference Voltages

(Reference Outputs)

o Programmable V

Voltage Calibration

COM

o 400mA Peak Current on Reference Outputs and

DAC Outputs 1, 7, 8, and 14

variable reference (DVR) for V

voltage calibration.

COM

The EV kit can use a 9V to 20V DC power supply for

powering the application circuit.

o 200mA Peak Current on DAC Outputs 2–6 and 9–13

o Peak Output Currents

400mA: 4 DAC Outputs and 4 DAC Reference

Outputs

2

The EV kit features a USB-to-I C interface circuit.

®

Windows 2000/XP- and Windows Vista -compatible

software, with a graphical user interface (GUI), is avail-

able for exercising the MAX9694 features. The EV kit

200mA: 10 DAC Outputs

2

can also connect to a user-supplied I C interface cir-

cuit for stand-alone MAX9694 operation.

o 9V to 20V DC Power-Supply Operation

2

o USB-Powered USB-to-I C Interface Circuit

o Windows 2000/XP/Vista (32-Bit)-Compatible Software

o Lead-Free and RoHS Compliant

o Proven PCB Layout

Ordering Information

PART

TYPE

MAX9694EVKIT+

EV Kit

o Fully Assembled and Tested

+Denotes lead-free and RoHS compliant.

Component List

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

Not installed, ceramic capacitors

(0603)

3300pF 10ꢀ, 50V X7R ceramic

capacitor (0603)

Murata GRM188R71H332K or

TDK C1608X7R1H332K

C1–C18

0

C37

1

2

3

0.1μF 10ꢀ, 25V X7R ceramic

capacitors (0603)

Murata GRM188R71E104K or

TDK C1608X7R1E104K

C19, C21, C23,

C25, C27–C34,

C40, C41, C42

15

22pF 5ꢀ, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H220J or

TDK C1608C0G1H220J

C38, C39

10μF 10ꢀ, 10V X7R ceramic

capacitors (0805)

Murata GRM21BR71A106K

C20, C26, C45,

C47

4

2

1μF 10ꢀ, 10V X5R ceramic

capacitors (0603)

Murata GRM188R61A105K or

TDK C1608X5R1A105K

10μF 10ꢀ, 25V X5R ceramic

capacitors (1206)

Murata GRM31CR61E106K

C43, C44, C46

C22, C24

C35, C36

Green LED (0603)

Panasonic LNJ314G8TRA

D1

1

0

10pF 5ꢀ, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H100J or

TDK C1608C0G1H100J

2

Not installed, ferrite-bead inductor

(0603)

FB1

Windows and Windows Vista are registered trademarks of

Microsoft Corp.

________________________________________________________________ Maxim Integrated Products

1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX9694 Evaluation Kit

Component List (continued)

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

Not installed, dual-row (2 x 20)

40-pin header

Reference voltage generator

(32 TQFN-EP*)

Maxim MAX9694ETJ+

J1

J2

0

U1

U2

1

Not installed, dual-row (2 x 2)

4-pin header

Low-power 16-bit microcontroller

(68 QFN-EP*)

Maxim MAXQ2000-RAX+

JU1

JU2

1

3-pin header

5-pin header

U3

U4

1

93C46 3-wire 16-bit EEPROM (8 SO)

UART-to-USB converter (32 TQFP)

OUT_1–OUT_14,

OUTREFUH,

OUTREFUL,

OUTREFLH,

OUTREFLL

0

Not installed, small PCB test points

3.3V regulator (5 SC70)

Maxim MAX8511EXK33+T

(Top Mark: AEI)

U5

U6

1

Not installed, resistors (0603)

R1–R20, R58 are open;

R29–R46 are short

R1–R20,

R29–R46, R58

2.5V regulator (5 SC70)

Maxim MAX8511EXK25+T

(Top Mark: ADV)

0

R21, R25

R22, R24

R23

2

1

100Ω 1ꢀ resistors (0603)

4.32kΩ 1ꢀ resistors (0603)

1.21kΩ 1ꢀ resistor (0603)

Evluates:MAX694

Dual bidirectional level translators

(8 TDFN-EP*)

Maxim MAX3394EETA+T

(Top Mark: APE)

U7

1

R26, R27, R50,

R54, R55

5

2.2kΩ 5ꢀ resistors (0603)

USB type-B right-angle female

receptacle

USB

R28

R47, R48

R49

1

2

1

0

1

3.3kΩ 1ꢀ resistor (0603)

27Ω 5ꢀ resistors (0603)

1.5kΩ 5ꢀ resistor (0603)

10kΩ 5ꢀ resistor (0603)

220Ω 5ꢀ resistor (0603)

Not installed, resistor (0402)

0Ω 5ꢀ resistor (0603)

Y1

1

2

1

16MHz crystal

Y2

6MHz crystal

R51

—

Shunts (JU1, JU2)

PCB: MAX9694 Evaluation Kit+

R52

—

R53

*EP = Exposed pad.

R59

Component Suppliers

SUPPLIER

Murata Electronics North America, Inc.

Panasonic Corp.

PHONE

WEBSITE

770-436-1300

800-344-2112

847-803-6100

www.murata-northamerica.com

www.panasonic.com

TDK Corp.

www.component.tdk.com

Note: Indicate that you are using the MAX9694 when contacting these component suppliers.

2

_______________________________________________________________________________________

MAX9694 Evaluation Kit

Evluates:MAX694

MAX9694 EV Kit Files

FILES

INSTALL.EXE

MAX9694.EXE

REF.INI

DESCRIPTION

Installs the EV kit files on your computer

Application program

Software Initialization File

FTD2XX.INF

USB device driver file

UNINST.INI

Uninstalls the EV kit software

USB driver installation help file

USB_Driver_Help.PDF

Search for the best driver for your device option.

Specify the location of the device driver to be

C:\Program Files\MAX9694 (default installation

directory) using the Browse button. During device

driver installation, Windows may show a warning

message indicating that the device driver Maxim

uses does not contain a digital signature. This is not

an error condition and it is safe to proceed with instal-

lation. Refer to the USB_Driver_Help.PDF document

included with the software for additional information.

Quick Start

Required Equipment

Before beginning, the following equipment is needed:

•

MAX9694 EV kit (USB cable included)

A user-supplied Windows 2000/XP- or Windows

Vista-compatible PC with a spare USB port

•

9V to 20V DC power supply @ 500mA

One digital voltmeter (DVM)

5) Once the software and hardware installation is com-

plete, disconnect the USB cable from the EV kit.

Note: In the following sections, software-related items

are identified by bolding. Text in bold refers to items

directly from the EV kit software. Text in bold and

underlined refers to items from the Windows operating

system.

6) Verify that shunts are installed as follows:

JU1: Pins 1-2 (on-board 3.3V digital power supply)

JU2: Pins 1-2 (MAX9694 write address = 0xE8)

7) Connect the USB cable to the EV kit.

Procedure

The MAX9694 EV kit is fully assembled and tested.

Follow the steps below to verify board operation:

8) Connect the DVM negative terminal to the AGND

PCB pad next to the VREFL_L PCB pad.

1) Visit www.maxim-ic.com/evkitsoftware to down-

load the latest version of the EV kit software,

9694Rxx.ZIP. Save the EV kit software to a tempo-

rary folder and uncompress the ZIP file.

9) Connect a voltage probe to the DVM positive termi-

nal for later use.

10) Set the power supply to 15V and disable the power-

supply output.

2) Install the EV kit software on your computer by run-

ning the INSTALL.EXE program inside the tempo-

rary folder. The program files are copied and icons

are created in the Windows Start | Programs

menu.

11) Connect the power-supply positive terminal to the

AVDD PCB pad (center of board) and the negative

terminal to the nearby AGND PCB pad.

12) Enable the power-supply output.

3) Connect the USB cable from the PC to the EV kit

board. A New Hardware Found window pops up

when installing the USB driver for the first time. If

you do not see a window that is similar to the one

described above after 30 seconds, remove the USB

cable from the board and reconnect it.

Administrator privileges are required to install the

USB device driver on Windows.

13) Start the MAX9694 EV kit software by opening its

icon in the Start | Programs menu. The EV kit soft-

ware main window appears, as shown in Figure 1.

14) Use the DVM voltage probe to measure the refer-

ence input voltages on the VREFU_H, VREFU_L,

VREFL_H, and VREFL_L PCB pads, and type those

values into the corresponding edit boxes of the

Reference Voltages (V) group box in the software.

4) Follow the directions of the Add New Hardware

Wizard to install the USB device driver. Choose the

_______________________________________________________________________________________

3

MAX9694 Evaluation Kit

15) Press the Quick Start button.

MUST be measured at the appropriate PCB pads and

the values entered in the respective Reference

Voltages (V) edit boxes for the DAC output calculations

to be correct.

16) Use the DVM voltage probe to verify that the DAC

output voltages are close to the voltages shown in

the Output (V) edit boxes for the respective channel.

Upon IC startup, the DAC outputs wake up in high-

impedance mode. To exit high-impedance mode, press

the Quick Start button or perform the following steps:

Detailed Description of Software

The MAX9694 evaluation software main window is

shown in Figure 1. The GUI software automatically

detects the MAX9694 device address and displays it in

the I2C Address Setting drop-down list and in the soft-

ware status bar. The DAC output voltages in the Upper

DAC Channels and Lower DAC Channels group

boxes are calculated using the upper and lower refer-

ence input voltages on PCB pads VREFU_H, VREFU_L,

VREFL_H, and VREFL_L. The reference input voltages

1) Modify any of the DAC channel’s register values.

Register values are modified using the edit boxes

and scrollbars of the Register Settings tab. See

the Output Register Values section for more infor-

mation.

2) Press the Load All Values To Registers button.

The Quick Start button loads all registers with the val-

ues shown in Figure 1.

Evluates:MAX694

Figure 1. MAX9694 Evaluation Software Main Window

4

_______________________________________________________________________________________

MAX9694 Evaluation Kit

Evluates:MAX694

2

Output (V) edit box. The software uses a register

value that generates a voltage closest to the

desired voltage value.

I C Address Setting

2

The MAX9694’s I C slave address is displayed in the

I2C Address Setting drop-down list and in the bottom

status bar of the software window. If an address is

manually selected in the drop-down list, the software

verifies the address and changes the address dis-

played appropriately. If no acknowledge is received

from the EV kit, a pop-up window opens, directing the

user to properly set jumper JU2 on the EV kit. If the

Auto Detect Address checkbox is checked, the soft-

When a register value is changed, the corresponding

field changes its color to red. A user should synchro-

nize the GUI fields and actual device registers by

pressing the Load All Values To Registers button.

The Load All Reg Values From File button is used to

load all the register values and reference voltages from

a user-selected text file. The Save All Reg Values To

File button is used to save all the register values and

reference voltages on the current GUI to a user-named

text file.

2

ware automatically detects the I C address of the

MAX9694.

Upper and Lower DAC Output Voltages

The upper and lower DAC output voltages are generat-

ed using an on-board resistor-divider network. The user

can also apply external references to the VREFU_H,

VREFU_L, VREFL_H, and VREFL_L and AGND PCB

pads. The voltages on these four pads MUST be cap-

tured and typed into the appropriate edit boxes in the

Reference Voltages (V) group box for the calculated

DAC output voltages shown in the Upper DAC

Channels and Lower DAC Channels group boxes to

be correct.

V

Calibration

COM

V

calibration is controlled using the scrollbar and

COM

edit box of the DVR_OUT group box (see the Hardware

Configuration for V Calibration section to make use

COM

of this feature). The register value for the 7-bit DAC

controls the DVR_OUT sink current adjusting the volt-

age at the DVR_OUT pin as follows:

⎛

⎞

R20

R19 + R20

D +1

128

R19

20 × R28

⎛

⎝

⎞

⎠

⎛

⎝

⎞

⎠

⎛

⎝

⎞

⎠

V

=

× 1−

×

× AVDD

DVR

⎜

⎟

⎜

⎟

⎜

⎟

⎜

⎟

⎝

⎠

The transfer function for the upper DAC channels is:

where D is the DVR_OUT 7-bit register value and AVDD

is the voltage at the AVDD PCB pad.

D

256

V

= VREFU_L +

× (VREFU_H - VREFU_L)

OUT

Advanced User Interface

The transfer function for the lower DAC channels is:

D

A serial interface can be used by advanced users by

clicking Options | Interface (Advanced Users) from

the menu bar.

V

= VREFL_L +

× (VREFL_H - VREFL_L)

OUT

256

Click on the 2-wire interface tab shown in Figure 2.

Press the Hunt for active listeners button to obtain the

current MAX9694 slave address in the Target Device

Address: combo box. In the General commands tab

select 1 – SMBusWriteByte(addr,cmd,data8) in the

Command (SMBus Protocols, Raw Block Read/Write,

EEPROM Read/Write) drop-down list. Enter the desired

values into the Command byte: and Data Out: combo

boxes and then press the Execute button.

In both equations, D is the register’s decimal value.

Refer to the MAX9694 IC data sheet for more details.

When the evaluation software is run for the first time,

the reference input-voltage values in the Reference

Voltages (V) group box are loaded from an initialization

file (REF.INI). When the program is closed, the current

values are logged into the initialization file. The next

time the program is run, the latest values are loaded

automatically.

Detailed Description of Hardware

Output Register Values

Each DAC channel’s register value can be set in three

ways within the Upper DAC Channels and Lower DAC

Channels group boxes by:

The MAX9694 EV kit demonstrates the MAX9694 refer-

ence voltage generator in a 32-pin TQFN surface-

mount package with an exposed pad. EV kit

applications include gamma correction in TFT-LCD

panels, such as those found in high-resolution TVs,

high-end monitors, or for general industrial reference

voltage generation. Using four input reference voltages

(DAC reference inputs), the MAX9694 EV kit provides

14 programmable reference voltage outputs (DAC out-

•

Moving the channel’s scrollbar.

Typing register values directly into the channel’s

Reg Value edit box (decimal 8-bit equivalent).

•

Typing the expected output voltage in the channel’s

_______________________________________________________________________________________

5

MAX9694 Evaluation Kit

Evluates:MAX694

2

Figure 2. Advanced I C User Interface Window (2-Wire Interface Tab)

puts), four static buffered reference voltage outputs

(reference outputs), and a 7-bit DVR output for calibrat-

The on-board resistor-divider network (R21–R25) gen-

erates the reference inputs (REFU_H, REFU_L,

REFL_H, and REFL_L). The user can also apply exter-

nal reference voltages to the VREFU_H, VREFU_L,

VREFL_H, and VREFL_L PCB pads after removing

resistors R21–R25.

ing a V

voltage.

COM

To monitor the MAX9694 EV kit’s 14 DAC outputs

(OUT1–OUT14), and four reference outputs

(OUT_REFU_H, OUT_REFU_L, OUT_REFL_H, and

OUT_REFL_L), use header J1 or the labeled test points.

Reference outputs OUT_REFU_H, OUT_REFU_L,

OUT_REFL_H, OUT_REFL_L and DAC outputs OUT1,

OUT7, OUT8, and OUT14 provide 400mA of peak cur-

rent. DAC outputs OUT2–OUT6 and OUT9–OUT13 pro-

vide 200mA of peak current. Please stay within the

MAX9694 IC’s power rating. Refer to the MAX9694 IC

data sheet for more information.

The EV kit uses a 9V to 20V DC power supply, connect-

ed across the AVDD and AGND PCB pads, for powering

the EV kit application circuit. The EV kit may require up to

500mA of supply current depending on output loading.

6

_______________________________________________________________________________________

MAX9694 Evaluation Kit

Evluates:MAX694

2

The USB-to-I C interface circuit is powered by 2.5V

MAX9694 Slave Address Description

2

and 3.3V Maxim MAX8511 voltage regulators. The

application circuit’s digital supply (DVDD) can operate

from the on-board 3.3V supply or from a 2.7V to 3.6V

user supply. A Maxim MAX3394E dual, bidirectional

level translator provides logic-level translation between

the MAXQ2000 low-power 16-bit microcontroller and

the featured MAX9694 reference voltage generator.

The MAX9694 I C slave address can be set by jumper

JU2. The slave address can be set to one of four different

addresses. See Table 2 for slave address configuration.

Stand-Alone User-Supplied

2

I C Communication

The MAX9694 EV kit can be used in stand-alone opera-

2

tion to interface with a user’s I C system without using a

Hardware Configuration

PC. To use the MAX9694 EV kit with a user-supplied

2

for V

Calibration

I C interface, perform the following steps:

COM

To make use of the MAX9694 V

connect the DVR_OUT PCB pad to a V

install appropriate values for resistors R19 and R20. By

default, the EV kit comes with 3.3kΩ installed at set resis-

tor R28. Refer to the Digital Variable Reference (DVR) sec-

tion of the MAX9694 IC data sheet for more information.

calibration feature,

1) Disconnect the USB cable from the EV kit.

amplifier or

COM

2) Cut open the shorting traces of jumper J2 on the top

layer.

3) Move the jumper JU1 shunt to pins 2-3.

4) Connect the positive terminal of a user-supplied 2.7V

to 5.5V DC power supply to the DIN PCB pad and

the negative terminal to the nearby DGND PCB pad.

Digital Supply Configuration

The MAX9694 EV kit provides two options to power the

MAX9694 DVDD, digital supply input. DVDD can operate

2

5) If the user-supplied I C interface circuit includes

2

from the 3.3V supply generated by the USB-to-I C inter-

pullup resistors for SDA and SCL, remove resistors

R26 and R27. Resistors R26 and R27 are pulled up

to DVDD.

face circuit or from a user-supplied 2.7V to 5.5V DC power

supply connected across the DIN and DGND PCB pads.

The user supply must provide a minimum of 100mA.

See Table 1 to configure DVDD using jumper JU1.

2

6) Connect the user-supplied I C interface signals

and signal ground return to the EV kit PCB pads, as

shown in Table 3.

Caution: Always ensure that DVDD is powered before

AVDD.

Table 1. Digital Supply Configuration (Jumper JU1)

2

SHUNT POSITION

DVDD PIN CONNECTION

DVDD POWER

I C COMMUNICATION

1-2*

3.3V

On-board

User-supplied

DVDD range: 3.3V to 5.5V**

2-3

DVDD PCB pad

On-board

User-supplied

DVDD range: 2.7V to 5.5V

2-3

User-supplied

*Default position.

2

**Minimum DVDD is limited to 3.3V by the USB-to-I C interface circuit 3.3V logic level.

2

Table 2. Slave Address Configuration

(Jumper JU2)

Table 3. User-Supplied I C Interface

USER-SUPPLIED

SIGNAL

EV KIT PCB PAD

SIGNAL

MAX9694 ADDRESS (hex)

SHUNT

A0 PIN

2

SDA

I C data

SDA

SCL

POSITION

CONNECTION

WRITE

0xE8

READ

0xE9

0xEB

0xED

0xEF

2

SCL

I C clock

1-2*

DGND

DIN

Signal ground

return

1-3

0xEA

0xEC

0xEE

GND

DGND

1-4

1-5

SCL

SDA

*Default position.

_______________________________________________________________________________________

7

MAX9694 Evaluation Kit

Evluates:MAX694

Figure 3. MAX9694 EV Kit Schematic—Application Circuit

8

_______________________________________________________________________________________

MAX9694 Evaluation Kit

Evluates:MAX694

2

Figure 4. MAX9694 EV Kit Schematic—USB-to-I C Circuit

_______________________________________________________________________________________

9

MAX9694 Evaluation Kit

Evluates:MAX694

Figure 5. MAX9694 EV Kit Component Placement Guide—Component Side

10 ______________________________________________________________________________________

MAX9694 Evaluation Kit

Evluates:MAX694

Figure 6. MAX9694 EV Kit PCB Layout—Component Side

______________________________________________________________________________________ 11

MAX9694 Evaluation Kit

Evluates:MAX694

Figure 7. MAX9694 EV Kit PCB Layout—Solder Side

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

is a registered trademark of Maxim Integrated Products, Inc.


型号：	MAX9694EVKIT
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Lead-Free and RoHS Compliant
文件：	总12页 (文件大小：486K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MAX9694EVKIT [MAXIM]

相关型号：

MAX9694EVKIT+

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MAX9698BCPE-2

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MAX9698BCSE

MAX9698C

MAX9698C/D

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MAX9698CJE-4