19-0561; Rev 0; 5/06
MAX9590 Evaluation Kit/Evaluation System
General Description
The MAX9590 evaluation kit (EV kit) is a fully assembled
and tested circuit board that evaluates the MAX9590.
The MAX9590 EV kit provides 14 programmable volt-
age references and 4 static voltage references for
gamma correction in TFT-LCD displays. Two register
banks are provided to store two sets of gamma refer-
ence values. Gamma values are programmed into the
banks through the I
2
C interface, and the settling time
for outputs is less than 0.5µs.
The 14 programmable reference voltages are divided
evenly into seven upper and seven lower voltages for
the upper and lower gamma curves of LCD column dri-
vers. The 14 programmable buffers wake-up in a high-
impedance state until the registers are programmed.
This protects the LCD system from high transient cur-
rents during the startup phase.
The EV kit includes Windows
®
98SE/2000/XP-compati-
ble software that provides a graphical user interface
(GUI) for exercising the features of the MAX9590.
The MAX9590 evaluation system (EV system) consists
of the MAX9590EVKIT and a companion CMAXQUSB
serial interface board. The CMAXQUSB interface board
allows a PC to control an I
2
C interface using its USB
port. Order the MAX9590EVCMAXQU for a complete
PC-based evaluation of the MAX9590. Order the
MAX9590EVKIT if you already have a MAX9590 com-
patible serial interface.
♦
4 Static Reference Voltages
♦
Max 16.5V Operating Voltage
♦
Output Swing within 150mV of Rails
♦
Peak Current Greater than 200mA
♦
Output Channels Tri-Stated During Wake-Up
♦
USB Powered (EV System Only)
♦
Proven PC Board Layout
♦
Free Windows 98SE/2000/XP-Compatible
Evaluation Software at www.maxim-ic.com
♦
Fully Assembled and Tested
Features
♦
14 Programmable Reference Voltages
Evaluate: MAX9590
Component List
MAX9590 EV Kit
DESIGNATION QTY
C1–C18
C19, C21, C23,
C24
0
DESCRIPTION
Not installed, ceramic capacitors (0603)
0.1µF ±10%, 25V X7R ceramic
capacitors (0603)
TDK C1608X7R1E104K or
Taiyo Yuden TMK107BJ104KA
10µF ±20%, 25V X5R ceramic
capacitors (1210)
Murata GRM32DR61E106M
20-pin, 2 x 10 right-angle receptacle
Not installed, 2 x 20 straight male
header
3-pin header
5-pin header
Not installed, resistors (0603)
1kΩ ±5% resistors (0603)
100Ω ±1% resistors (0603)
4.32kΩ ±1% resistors (0603)
1.21kΩ ±1% resistor (0603)
Not installed, resistors (0603)
LCD gamma reference voltage generator
(38-pin QFN-EP, 7mm x 5mm)
Maxim MAX9590ETU
Shunts
MAX9590 EV kit PC board
4
C20, C22, C25
J1
3
1
0
1
1
0
2
2
2
1
0
1
2
1
Windows is a registered trademark of Microsoft Corp.
J2
JU1
Ordering Information
PART
MAX9590EVKIT
MAX9590EVCMAXQU
TYPE
EV kit
EV system
INTERFACE
User-supplied I
2
C
interface
CMAXQUSB interface
board
JU2
R1–R18
R19, R20
R21, R25
R22, R24
R23
R26, R27
U1
—
—
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX9590 Evaluation Kit/Evaluation System
Evaluate: MAX9590
Component List (continued)
MAX9590 EV System
PART
MAX9590EVKIT
CMAXQUSB
QTY
1
1
DESCRIPTION
MAX9590 EV kit
CMAXQUSB board
Procedure
Please visit the Maxim Integrated Products website
(www.maxim-ic.com) to download the most recent ver-
sion of the EV kit software 9590RXX.ZIP. The MAX9590
EV kit is fully assembled and tested. Follow these steps
to verify board operation. Do not turn on the power sup-
ply until all connections are completed.
1) Set jumper JU1 on the CMAXQUSB at 3.3V or 5V output.
2) Set DIP switch SW1 on the CMAXQUSB to the ON
position (SCL and SDA line pullup resistors
enabled).
3) Set the jumpers on the MAX9590EVKIT as follows:
JU1: pins 1-2 (EV kit powered by CMAXQUSB)
JU2: pins 1-2 (default I
2
C write address is 0xE8)
4) Connect the MAX9590 EV kit 2 x 10-pin receptacle
(J1) to the CMAXQUSB 2 x 10-pin header (P3).
5) Connect the 9V to 16.5V DC power supply to the
AVDD and AGND pads on the EV kit and turn on
the power supply.
6) Install the MAX9590 evaluation software on your
computer by running the INSTALL.EXE program. The
program files are copied and icons are created for
them in the Windows
Start
menu
| All Programs |
Maxim MAX9590 Evaluation Kit
by default.
7) Connect the USB cable between the PC’s USB port
and the CMAXQUSB’s USB connector (P2). A
New
Hardware Found
window should pop up. If you do not
see this window after about 30 seconds, try removing
the USB cable from the CMAXQUSB and reconnect it.
Administrator privileges are required to install the
USB device driver on Windows 2000 and Windows
XP. Refer to the TROUBLESHOOTING_USB.PDF file
if problems are experienced during this step.
8) Follow the directions of the
Add New Hardware
Wizard
to install the USB device driver. Choose the
Search for the best driver for your device
option.
Specify the location of the device driver to be
C:\Program Files\MAX9590
(or the directory cho-
sen during installation) using the
Browse
button.
9) Start the MAX9590 EV kit software by opening its
icon in the
Start | All Programs | Maxim MAX9590
Evaluation Kit.
10) The program automatically detects the MAX9590
address and displays it on the bottom of the win-
dow. By default, the software sets the MAX9590 in
Standard operation mode and selects bank A to be
buffered to the output.
11) Measure the voltages on the VREFU_H, VREFU_L,
VREFL_H, VREFL_L pads, and type the values in
Component Suppliers
SUPPLIER
Murata
Taiyo Yuden
TDK
PHONE
WEBSITE
770-436-1300 www.murata-northamerica.com
847-925-0888 www.t-yuden.com
847-803-6100 www.component.tdk.com
Note:
Indicate you are using the MAX9590 when contacting
these component suppliers.
MAX9590 EV Kit Files
FILE
INSTALL.EXE
MAX9590.EXE
HELPFILE.MHT
FTD2XX.INF
UNINST.INI
TROUBLESHOOTING_USB.PDF
DESCRIPTION
Installs the EV kit files on
your computer
Application program
Help file
USB device driver file
Uninstalls the EV kit
software
USB driver installation help
file
Quick Start
•
The Maxim MAX9590EVCMAXQU evaluation system:
MAX9590EVKIT
CMAXQUSB serial interface board (USB cable
included)
•
+9V to +16.5V, 3A power supply
•
DC voltage measurement equipment, e.g., voltmeter
or equivalent
•
A user-supplied Windows 98SE/2000/XP PC with an
available USB port
Note:
In the following section(s), software-related items
are identified by bolding. Text in
bold
refers to items
directly from the EV kit software. Text in
bold and under-
line
refers to items from the Windows 98SE/2000/XP
operating system.
Required Equipment
2
_______________________________________________________________________________________
MAX9590 Evaluation Kit/Evaluation System
the corresponding fields in the
Reference Voltages
(V)
group box.
12) Move the slide bars or type in appropriate register
values for any output channels, and click the
Load All
Values To Registers
button. Using the voltage mea-
surement equipment, verify that the output voltages
are close to the corresponding expected voltages.
Evaluate: MAX9590
Figure 1. MAX9590 Evaluation Software Main Window
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3
MAX9590 Evaluation Kit/Evaluation System
Evaluate: MAX9590
Detailed Description of Software
The evaluation software’s main window is shown in
Figure
1.
Register Addressing Mode
The
Standard
and
Register
selections in the
Register
Addressing Mode
box set the MAX9590 operation
mode.
I
2
C Address Setting
If the
Auto Detect Address
checkbox is checked, the
software automatically detects the I
2
C address of the
MAX9590. The MAX9590’s I
2
C slave address is dis-
played on the status bar of the software window and
the address pulldown menu. If an address is manually
selected in the address pulldown menu, then the soft-
ware probes the designated address and displays
appropriately. If no acknowledgement is received from
the EV kit, a pop-up window is opened and the user is
directed to properly set JU2 on the EV kit.
Output Bank Select
The
Bank A, Bank B,
and
A, B Alternating
selections
in the
Output Bank Select
box select the set of refer-
ence voltages buffered to the outputs, either bank A,
bank B, or alternating between bank A and bank B with
1 second hold time for each bank.
Change Register Values
Register values can be set in three different ways. First,
a user can move the slide bars and monitor the register
values and expected output voltages in the corre-
sponding fields. Second, a user can type in register
values directly. Last, a user can type in expected out-
put voltages and the software calculates and displays
the closest register values for the user.
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 click-
ing either the
Load
button (in register mode) or the
Load All Values To Registers
button (in standard
mode).
The
Load All Reg Values From File
button is used to
load all the register values and reference voltages from
a text file. The
Save All Reg Values To File
button is
used to save all the register values and reference volt-
ages on the current GUI to a text file.
Register read/write operations can take place regard-
less of the output bank setting; for example, the user
can change bank B registers when bank A is buffered
to the outputs.
Upper and Lower DAC Reference Voltages
The upper and lower DAC reference voltages are gen-
erated by either an on-board resistor-divider network or
external references applied on the VREFU_H,
VREFU_L, VREFL_H, and VREFL_L pads. The actual
voltages on these four pads MUST be captured and
typed in the fields within the
Reference Voltages (V)
group box for the calculated DAC output voltages
shown in the
Upper DAC Channels/Lower DAC
Channels
group boxes to be correct.
The transfer function for upper DAC channels is:
V
OUT
=
VREFU _ L
+
D
×
(
VREFU _ H
−
VREFU _ L
)
255
The transfer function for lower DAC channels is:
V
OUT
=
VREFL _ L
+
D
×
(
VREFL _ H
−
VREFL _ L
)
255
In both formulas, D is the decimal register value.
When the evaluation software is run for the first time,
the reference voltage values in the
Reference
Voltages (V)
group box are loaded from an initialization
file (REF.INI). The user should measure the actual volt-
age values on the VREFU_H, VREFU_L, VREFL_H, and
VREFL_L pads and type in the values in the appropri-
ate fields on the software main window. When the pro-
gram is closed, the reference voltages in the current
fields are logged in the initialization file, so the next time
when the program is run, the reference voltages are
loaded automatically.
Register Power-On Reset
Click the
Register Power On Reset
button to set all the
registers to the default power-on values. The MAX9590
cannot be set to high-impedance output mode by the
Register Power On Reset
button.
Register Mode I
2
C Activity
The
Register Mode I2C Activity
group box is used for
the convenience of debugging in register mode. When
an individual register is written, the bits sent to the
MAX9590 through the I
2
C interface are displayed.
4
_______________________________________________________________________________________
MAX9590 Evaluation Kit/Evaluation System
Detailed Description of Hardware
MAX9590 EV System
The MAX9590 EV system is a PC-controlled reference
voltage generation system consisting of a MAX9590 EV
kit and the Maxim CMAXQUSB serial interface board.
Evaluate: MAX9590
Table 2. MAX9590 EV Kit Jumper JU1
JUMPER
SHUNT POSITON
1-2*
JU1
2-3
User supplied (from
DVDD and DGND pads)
EV KIT DIGITAL
SUPPLY VOLTAGE
CMAXQUSB interface
board supplied
CMAXQUSB Serial Interface Board
The CMAXQUSB serial interface board uses a propri-
etary design to provide SPI- and I
2
C-compatible inter-
faces to demonstrate various Maxim devices. Maxim
reserves the right to change the implementation of this
module at any time with no advance notice.
*Default
configuration.
CMAXQUSB Power Supply
Do not plug a power adapter into the P1 power jack
because power is provided from the USB port. JU1 on
the CMAXQUSB board selects the digital power-supply
voltage for the MAX9590 EV kit. Place the shunt on the
3.3V or 5V position for the MAX9590 to work properly.
The analog power supply for the MAX9590 EV kit
comes from the AVDD and AGND pads; apply a +9V to
+16.5V, 3A power supply on the AVDD and AGND
pads on the EV kit.
MAX9590 Slave Address Description
The MAX9590 I
2
C address can be set by JU2. See
Table
3 for address configuration.
Table 1. CMAXQUSB Jumper JU1
JUMPER
JU1
SHUNT POSITON
3.3V marking
5V marking
EV KIT DIGITAL
SUPPLY VOLTAGE
3.3V
5V
Table 3. MAX9590 EV Kit Jumper JU2
JUMPER
SHUNT POSITION
1-2* (A0 connected to DGND)
JU2
1-3 (A0 connected to DVDD)
1-4 (A0 connected to SCL)
1-5 (A0 connected to SDA)
MAX9590 WRITE
ADDRESS (hex)
0xE8
0xEA
0xEC
0xEE
MAX9590 EV Kit
The digital power supply for the MAX9590 EV kit comes
from either the CMAXQUSB interface board or the user-
supplied external power source. Set the JU1 shunt on
pin 1 and pin 2 (default configuration) to use the power
supply from the CMAXQUSB interface board. To evalu-
ate the MAX9590 with a different digital power-supply
voltage, set the JU1 shunt on pin 2 and pin 3 and apply
an appropriate voltage on the DVDD and DGND pads.
SPI is a trademark of Motorola, Inc.
*Default
configuration.
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