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MAX9660 Evaluation Kit
Quick Start
6) Verify that a shunt is installed on jumper JU1 pins
2-3 (on-board 3.3V digital power supply).
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Required Equipment
MAX9660 EV kit (USB cable included)
User-supplied Windows 2000/XP or Windows Vista
PC with a spare USB port
8V to 20V DC power supply at 1A
One digital voltmeter (DVM)
7) Set the power supply to 15V and disable the
power-supply output.
8) Connect the power-supply positive terminal to the
AVDD PCB pad and the negative terminal to the
GND PCB pad next to AVDD.
9) Connect the DVM negative terminal to the GND
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 MAX9660 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,
9660Rxx.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 a
window is not seen that is similar to the one
described above after 30s, remove the USB cable
from the board and reconnect it. Administrator priv-
ileges 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\MAX9660 (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.
5) Once the software and hardware installation is com-
plete, disconnect the USB cable from the EV kit.
PCB pad next to the VCOMOUT PCB pad.
10) Connect the DVM positive terminal to the VCOMOUT
PCB pad.
11) Connect the USB cable to the EV kit.
12) Enable the power-supply output.
13) Start the MAX9660 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 to verify that the output voltage is close
to the voltage shown in the Output (V) edit box.
15) To power down the EV kit, first turn off the AVDD
supply and then disconnect the USB cable.
Detailed Description of Software
The MAX9660 EV kit GUI software provides a user inter-
face (Figure 1) to control the features of the MAX9660
VCOM voltage buffer. To start the EV kit software, dou-
ble-click the MAX9660 EV kit icon created during instal-
lation. The software has a demo mode that is available
by selecting Options | Demo Mode from the menu bar.
When in demo mode, all software communication to the
EV kit hardware is disabled and most of the software’s
GUI is functional. This feature enables a user to evalu-
ate the software without hardware connectivity.
The user interface is easy to operate; use the mouse, or
press the Tab and arrow keys to navigate the window.
Press the Enter key after modifying an edit box to
update the software. The status bar located at the bot-
tom-left of the GUI window displays EV kit connectivity
status, while the lower-right status bar displays the
device address.
The VCOM output voltage in the Output (V) edit box is
calculated using the values in the Reference group
box’s AVDD (V) , R13 (kOhm) , R14 (kOhm) , and R15
(kOhm) edit boxes. The edit-box values in the
Reference group box MUST be correct for the soft-
ware’s VCOM output voltage calculation to be correct.
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