Datasheet

MAX5134 Evaluation Kit
Evaluates: MAX5134–MAX5137
3
Maxim Integrated
Quick Start
Required Equipment
Before beginning, the following equipment is needed.
• MAX5134 EV kit (USB cable included)
• A user-supplied Windows 2000/XP/Vista-compatible
PC with a spare USB port
• Two digital voltmeters (DVMs)
• USB powered (use optional external power supply
for enhanced performance)
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 MAX5134 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
1) Visit www.maximintegrated.com/evkitsoftware to
download the latest version of the EV kit software,
5134Rxx.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) Verify that all jumpers (JU1–JU9) are in their default
positions, as shown in Table 1.
4) 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.
5) 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\MAX5134 (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
installation. Refer to the USB_Driver_Help.PDF doc-
ument included with the software for additional
information.
6) Start the MAX5134 EV kit software by opening its
icon in the Start | Programs
menu.
7) When the Power Up State Of DAC Outputs win-
dow appears, verify that the JU6 shunt is in the
proper location on the board and press the corre-
sponding radio button. Next, the EV kit software
main window appears, as shown in Figure 1.
8) To measure the OUT0 voltage, connect the first
DVM between H2-1 (OUT0) and H2-2 (GND).
9) To measure the OUT1 voltage, connect the second
DVM between H2-3 (OUT1) and H2-4 (GND).
10) Verify that the voltage on both DVMs is approxi-
mately 1.22V.
11) In the Shift to Input and Output group box, check
the DAC A and DAC B checkboxes.
12) Enter 0x68EB into the D15 - D0 (Shift Register
Data Bits) edit box.
13) In the Shift to Input and Output group box, press
the Load Selected DAC(s) button.
14) Verify that the voltage shown on both DVMs is
approximately 1V.
Detailed Description of Software
The main window of the evaluation software (Figure 1)
displays the voltage and code for all DAC input and
output registers. In addition, the main window has two
tabs. The Load DACs tab sheet controls all of the DAC
loading features of the MAX5134. The Operating
Modes tab sheet (Figure 2) controls all of the DAC
modes of the MAX5134. The Load Setting(s) button
must be pressed to write the corresponding mode set-
tings to the DAC(s).
Software Reset
Press the Reset All Registers button to reset the
MAX5134’s registers and GUI to the power-on reset
(POR) state. This can be done at any time and is highly
recommended after using the advanced user interface.
Advanced User Interface
A manual serial interface can be used by advanced
users by clicking Options | Interface (Advanced Users).
For SPI, click on the 3-wire interface tab shown in
Figure 3. Enter data in to the Data bytes to be written:
edit box and press the Send Now button.