19-4258; Rev 0; 8/08
MAX9591 Evaluation Kit
General Description
The MAX9591 evaluation kit (EV kit) demonstrates the
MAX9591 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 MAX9591
EV kit provides 14 programmable reference-voltage
outputs (DAC outputs) and four static buffered refer-
ence-voltage outputs (reference outputs). The EV kit
uses a 9V to 20V DC power supply for powering the
application circuit.
The EV kit features a USB-to-I
2
C interface circuit.
Windows
®
2000/XP/Vista
®
-compatible software, with a
graphical user interface (GUI), is available for exercis-
ing the MAX9591 features. The EV kit can also connect
to a user-supplied I
2
C interface circuit for stand-alone
MAX9591 operation.
The MAX9591 EV kit can also be used to evaluate the
MAX9590ETU+.
Features
♦
14 8-Bit Programmable Reference Voltages (DAC
Outputs)
♦
Four Static Buffered Reference Voltages
(Reference Outputs)
♦
400mA Peak Current on Reference Outputs and
DAC Outputs 1, 7, 8, and 14
♦
200mA Peak Current on DAC Outputs 2–6 and
9–13
♦
9V to 20V DC Power-Supply Operation
♦
USB-Powered USB-to-I
2
C Interface Circuit
♦
Windows 2000/XP/Vista (32-Bit)-Compatible
Software
♦
Lead-Free and RoHS Compliant
♦
Proven PCB Layout
♦
Fully Assembled and Tested
Evaluates: MAX9590/MAX9591
Ordering Information
PART
MAX9591EVKIT+
TYPE
EV Kit
+Denotes
lead-free and RoHS compliant.
Component List
DESIGNATION
C1, C3–C10, C17,
C21, C22, C24,
C25
QTY
DESCRIPTION
0.1μF ±10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K or
TDK C1608X7R1C104K
10μF ±10%, 10V X5R ceramic
capacitors (0805)
Murata GRM219R61A106K
10pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J or
TDK C1608C0G1H100J
1μF ±10%, 10V X5R ceramic
capacitors (0603)
Murata GRM188R61A105K or
TDK C1608X5R1A105K
DESIGNATION
QTY
DESCRIPTION
22pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J or
TDK C1608C0G1H220J
3300pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H332K or
TDK C1608X7R1H332K
Not installed, ceramic capacitors
(0603)
10μF ±20%, 25V X5R ceramic
capacitors (1210)
Murata GRM32DR61E106M
14
C18, C19
2
C2, C13, C15
3
C20
1
C11, C12
2
C27–C44
0
C45, C48, C51
3
C14, C16, C23,
C26
4
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.
MAX9591 Evaluation Kit
Evaluates: MAX9590/MAX9591
Component List (continued)
DESIGNATION
C46, C47, C49,
C50
QTY
DESCRIPTION
0.1μF ±10%, 25V X7R ceramic
capacitors (0603)
Murata GRM188R71E104K or
TDK C1608X7R1E104K
Green LED (0603)
Panasonic LNJ314G8TRA
Not installed, ferrite-bead
inductor (0603)
Not installed, 40-pin dual-row
(2 x 20) header
Not installed, 2-pin headers
3-pin header
5-pin header
U3
U4
U5
1
1
1
U2
1
DESIGNATION
R39
R42, R43
USB
QTY
1
2
1
1.21k
1k
DESCRIPTION
±1% resistor (0603)
±5% resistors (0603)
4
USB type-B right-angle female
receptacle
Reference-voltage generator
(38 TQFN-EP*)
Maxim MAX9591ETU+
Low-power 16-bit microcontroller
(68 QFN-EP*)
Maxim MAXQ2000-RAX+
93C46 3-wire 16-bit EEPROM
(8 SO)
UART-to-USB converter (32 TQFP)
3.3V regulator (5 SC70)
Maxim MAX8511EXK33+T
(Top Mark: AEI)
2.5V regulator (5 SC70)
Maxim MAX8511EXK25+T
(Top Mark: ADV)
Dual bidirectional level
translators (8 TDFN-EP*)
Maxim MAX3394EETA+T
(Top Mark: APE)
16MHz crystal
6MHz crystal
Shunts (JU5, JU6)
PCB: MAX9591 Evaluation Kit+
D1
FB1
J1
JU1–JU4
JU5
JU6
OUT_REFL_H,
OUT_REFL_L,
OUT_REFU_H,
OUT_REFU_L,
OUT1–OUT14
R1
R2
R3
R4, R9–R12
R5
R6, R7
R8
R13–R16,
R17–R36, R44
R37, R41
R38, R40
1
0
0
0
1
1
U1
1
0
Not installed, small PCB test
points
1
1
1
5
1
2
0
0
2
2
0
±5% resistor (0603)
±5% resistor (0603)
±5% resistor (0603)
±5% resistors (0603)
±5% resistor (0603)
±5% resistors (0603)
U6
1
220
10k
2.2k
1.5k
27
U7, U8
2
Not installed, resistor (0402)
Not installed, resistors (0603)
100
4.32k
±1% resistors (0603)
±1% resistors (0603)
Y1
Y2
—
—
1
1
2
1
*EP
= Exposed pad.
Component Suppliers
SUPPLIER
Murata Electronics North America, Inc.
Panasonic Corp.
TDK Corp.
PHONE
770-436-1300
800-344-2112
847-803-6100
WEBSITE
www.murata-northamerica.com
www.panasonic.com
www.component.tdk.com
Note:
Indicate that you are using the MAX9591 when contacting these component suppliers.
2
_______________________________________________________________________________________
MAX9591 Evaluation Kit
MAX9591 EV Kit Files
FILES
INSTALL.EXE
MAX9591.EXE
FTD2XX.INF
UNINST.INI
USB_Driver_Help.PDF
Application program
USB device driver file
Uninstalls the EV kit software
USB driver installation help file
DESCRIPTION
Installs the EV kit files on your computer
Evaluates: MAX9590/MAX9591
Quick Start
Required Equipment
Before beginning, the following equipment is needed:
• MAX9591 EV kit (USB cable included)
•
•
•
A user-supplied Windows 2000/XP/Vista PC with a
spare USB port
9V to 20V DC power supply at 500mA
One digital voltmeter (DVM)
driver installation, Windows might 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
installation. Refer to the USB_Driver_Help.PDF doc-
ument included with the software if there are any
problems during this step.
5) Once the software and hardware installation is com-
plete, disconnect the USB cable from the EV kit.
6) Verify that shunts are installed on:
• Jumper JU5: Pins 1-2 (on-board 3.3V digital power
supply)
• Jumper JU6: Pins 1-2 (MAX9591 write address =
0xE8)
7) Connect the USB cable to the EV kit.
8) Connect the DVM negative terminal to the AGND
PCB pad next to the REFL_L PCB pad.
9) Connect a voltage probe to the DVM positive terminal
for later use.
10) Set the power supply to 15V and disable the power-
supply output.
11) Connect the power-supply positive terminal to the
AVDD PCB pad and the negative terminal to the
AGND PCB pad next to AVDD.
12) Enable the power-supply output.
13) Start the MAX9591 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 REFU_H, REFU_L,
REFL_H and REFL_L PCB pads, and type those val-
ues into the corresponding edit boxes of the
Reference Voltages (V)
group box.
15) Press the
Quick Start
button.
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.
3
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 under-
lined
refers to items from the Windows operating system.
Procedure
The MAX9591 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
1) Visit
www.maxim-ic.com/evkitsoftware
to down-
load the latest version of the EV kit software,
9591Rxx.ZIP. Save the EV kit software to a tempo-
rary folder and uncompress the ZIP file.
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.
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 30s, remove the USB cable
from the board and reconnect it. Administrator privi-
leges are required to install the USB device driver
on Windows.
4) 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\MAX9591
(default installation
directory) using the
Browse
button. During device
_______________________________________________________________________________________
MAX9591 Evaluation Kit
Evaluates: MAX9590/MAX9591
Figure 1. MAX9591 Evaluation Software Main Window
Detailed Description of Software
The MAX9591 evaluation kit (EV kit) software main win-
dow is shown in Figure 1. The GUI software automati-
cally detects the MAX9591 device address and
displays it in the
I2C Address Setting
drop-down list
and in the software status bar. The DAC output volt-
ages in the
Upper DAC Channels/Lower DAC
Channels
group boxes are calculated using the upper
and lower reference input voltages on PCB pads
REFU_H, REFU_L, REFL_H, and REFL_L. The reference
input voltages 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.
Upon IC startup, the DAC outputs wake up in high-
impedance mode. To exit high-impedance mode, click
the
Quick Start
button or perform the following steps:
4
1) Select the
Bank A
radio button in the
Output Bank
Select
group box. Select the
Bank A Register
Settings
tab.
2) Select the
Burst
radio button in the
Register
Addressing Mode
group box.
3) Modify any of the DAC channel’s register values.
See the
Output Register Values
section for more
information.
4) Press the
Load All Values To Registers
button.
5) Select the
Bank B
radio button in the
Output Bank
Select
group box. Select the
Bank B Register
Settings
tab. Repeat steps 3 and 4.
The
Quick Start
button loads all bank A and bank B
registers with a predefined set of values.
_______________________________________________________________________________________
MAX9591 Evaluation Kit
Register banks A and B are selectable using the radio
buttons in the
Output Bank Select
group box. Register
values are modified and loaded to registers using the
buttons, edit boxes, and scrollbars of the
Bank _
Register Settings
tabs where _ is either
A
or
B.
Output Register Values
Each DAC channel’s register value can be set in three
different ways within the
Upper DAC Channels/Lower
DAC Channels
group boxes by:
1) Moving the channel’s scrollbar.
2) Typing register values directly into the channel’s
Reg Value
edit box (decimal 8-bit equivalent).
3) Typing the expected output voltage in the chan-
nel’s
Output (V)
edit box. The software uses a reg-
ister value that generates a voltage closest to the
desired voltage value.
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 either the channel’s
Load
button (in single
mode) or the
Load All Values To Registers
button (in
burst 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 user-named 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.
Evaluates: MAX9590/MAX9591
I
2
C Address Setting
The MAX9591’s I
2
C slave address is displayed in the
status bar of the software window and the
I2C Address
Setting
drop-down list. If an address is manually
selected in the drop-down list, the software verifies the
address and changes the address displayed appropri-
ately. If no acknowledge is received from the EV kit, a
pop-up window is opened directing the user to properly
set jumper JU6 on the EV kit. If the
Auto Detect
Address
checkbox is checked, the software automati-
cally detects the I
2
C address of the MAX9591.
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 REFU_H,
REFU_L, REFL_H, and REFL_L, and AGND PCB pads.
The voltages on these four pads MUST be captured 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/Lower
DAC Channels
group boxes to be correct.
The transfer function for the upper DAC channels is:
D
V
OUT
=
REFU_L
+
×
(REFU_H - REFU_L)
256
The transfer function for the lower DAC channels is:
V
OUT
=
REFL_L
+
D
×
(REFL_H - REFL_L)
256
Register Addressing Mode
The
Burst
and
Single
radio buttons in the
Register
Addressing Mode
group box set the MAX9591 soft-
ware operation mode.
When the
Burst
radio button is selected, all registers
for a single bank are updated using the
Load All
Values To Registers
or
Load All Reg Values From
File
buttons. The individual register’s
Load
buttons are
disabled.
When the
Single
radio button is selected, single regis-
ter values are updated using the individual register’s
Load
buttons. The
Load All Values To Registers
and
Load All Reg Values From File
buttons are disabled.
In both equations, D is the decimal register value. Refer
to the MAX9591 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 in to the initialization file. The next
time the program is run, the latest values are loaded
automatically.
Register Mode I
2
C Activity
The
Register Mode I2C Activity
group box is used for
the convenience of debugging when the
Single
radio
button is selected. When an individual register is writ-
ten, the bits sent to the MAX9591 through the I
2
C inter-
face are displayed.
Output Bank Select
The
Bank A, Bank B,
and
A, B Alternating
radio but-
tons in the
Output Bank Select
group box choose the
set of reference voltages buffered to the outputs
between bank A, bank B, or alternating between banks
A and B, with 1s hold time for each bank.
_______________________________________________________________________________________
5
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