19-4060; Rev 0; 2/08
MAX5312 Evaluation Kit
General Description
The MAX5312 evaluation kit (EV kit) provides a proven
design to evaluate the MAX5312 ±10V, 12-bit, serial
voltage-output digital-to-analog converter (DAC). The
EV kit also includes Windows 2000/XP/Vista
®
(32-bit)-
compatible software that provides a simple graphical
user interface (GUI) for exercising the features of the
MAX5312. The MAX5312 EV kit printed-circuit board
(PCB) comes with a MAX5312EAE+ installed.
Features
♦
Evaluates ±10V or 0 to +10V Full-Scale Output-
Voltage Swing
♦
On-Board USB Interface Circuit for SPI™-
Compatible Signals
♦
USB-PC Connection (Cable Included)
♦
On-Board Pads for User-Supplied SPI-Compatible
Signals
♦
Proven PCB Layout
♦
Evaluates the MAX5312EAE+ in a 16-Pin SSOP
Package
♦
Windows 2000/XP/Vista (32-Bit)-Compatible
Software
♦
Fully Assembled and Tested
♦
Lead-Free and RoHS-Compliant
Evaluates: MAX5312
Ordering Information
PART
MAX5312EVKIT+
TYPE
EV Kit
+Denotes
lead-free and RoHS-compliant.
Component List
DESIGNATION
C1, C12, C14,
C25
QTY
4
DESCRIPTION
10µF ±20%, 16V X5R ceramic
capacitors (1206)
Murata GRM31CR61C106M
22pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
0.033µF ±10%, 16V X5R ceramic
capacitor (0603)
Taiyo Yuden EMK107BJ333KA
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104K
1µF ±10%, 16V X5R ceramic
capacitors (0603)
TDK C1608X5R1C105K
10pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
Not installed, capacitor (0603)
USB series-B right-angle PC-mount
receptacle
3-pin headers
DESIGNATION
L1
R1, R2
R3
R4
R5
R6
R10
R11
R12–R16, R19
QTY
1
2
1
1
1
1
1
1
0
DESCRIPTION
Ferrite bead
27Ω ±5% resistors (0603)
1.5kΩ ±5% resistor (0603)
470Ω ±5% resistor (0603)
2.2kΩ ±5% resistor (0603)
10kΩ ±5% resistor (0603)
169kΩ ±1% resistor (0603)
100kΩ ±1% resistor (0603)
Not installed, resistors—short (PC
trace) (0603)
±10V, 12-bit, serial voltage-output DAC
(16-pin SSOP)
Maxim MAX5312EAE+
Adjustable output LDO regulator
(5-pin SC70)
Maxim MAX8512EXK+T
LDO regulator (5-pin SC70)
Maxim MAX8511EXK25+T
USB UART (32-pin TQFP, 7mm x 7mm)
FTDI FT232BL
C2, C3
2
C4
C5–C10, C17,
C18, C19, C21,
C24, C26,
C28, C29, C31
C11, C13, C22,
C23, C27, C30
1
15
U1
1
6
U2
1
C15, C16
C20
J1
JU1–JU8, JU10
2
0
1
9
U3
U4
1
1
Windows Vista is registered trademark of Microsoft Corp.
SPI is a trademark of Motorola, Inc.
1
________________________________________________________________
Maxim Integrated Products
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.
MAX5312 Evaluation Kit
Evaluates: MAX5312
Component List (continued)
DESIGNATION
U5
QTY
1
DESCRIPTION
93C46 type 3-wire EEPROM (8-pin SO)
Atmel AT93C46A-10SU-2.7
Microcontroller
(68-pin QFN EP*, 10mm x 10mm)
Maxim MAXQ2000-RAX+
5.0V voltage reference (8-pin SO)
Maxim MAX6126BASA50+
DESIGNATION
Y1
Y2
Y3
—
—
—
QTY
1
1
0
9
1
1
DESCRIPTION
16MHz crystal
6MHz crystal
Not installed, crystal
Shunts
USB high-speed A-to-B cables, 6ft
PCB: MAX5312 Evaluation Kit+
U6
1
U7
1
*EP = Exposed pad.
Component Suppliers
SUPPLIER
Taiyo Yuden
TDK Corp.
PHONE
WEB SITE
FILE
INSTALL.EXE
MAX5312.EXE
FTD2XX.INF
UNINST.INI
Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com
800-348-2496 www.t-yuden.com
847-803-6100 www.component.tdk.com
MAX5312 EV Kit Files
DESCRIPTION
Installs the EV kit files on your computer
Application program
USB device driver file
Uninstalls the EV kit software
Note:
Indicate that you are using the MAX5312 when contact-
ing these component suppliers.
USB_Driver_Help.PDF USB driver installation help file
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• MAX5312 EV kit (USB cable included)
•
•
•
•
±15V power supply
+6V power supply
Voltmeter
A user-supplied Windows 2000/XP/Vista (32-bit)-
compatible PC with a spare USB port
folder. The program files are copied and icons are
created in the Windows
Start | Programs
menu.
3) Verify that all jumpers are in their default positions,
as shown in Table 1.
4) Ensure that the power supplies are off.
5) Connect the positive terminal of the ±15V power
supply to the pad labeled VDD.
6) Connect the negative terminal of the ±15V power
supply to the pad labeled VSS.
7) Connect the ground terminal of the ±15V power
supply to the pad labeled AGND.
8) Connect the positive terminal of the +6V power sup-
ply to the pad labeled REFVDD.
9) Connect the ground terminal of the +6V power sup-
ply to the pad labeled AGND.
10) Turn on the +6V power supply and the ±15V power
supply.
11) 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.
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.
Procedure
The MAX5312 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on power supplies until all con-
nections are completed.
1) Visit www.maxim-ic.com/evkitsoftware to download
the latest version of the EV kit software, 5312Rxx.ZIP.
Save the EV kit software to a temporary folder and
uncompress the ZIP file.
2) Install the EV kit software on your computer by run-
ning the INSTALL.EXE program inside the temporary
2
_______________________________________________________________________________________
MAX5312 Evaluation Kit
12) 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\MAX5312
(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.
13) Start the MAX5312 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) Wait approximately 5s for the program to connect to
the hardware.
15) Drag the DAC scrollbar all the way to the right.
16) Press the
Load input and DAC registers
button.
17) Use the voltmeter to verify that the voltage across the
OUT pad and the SGND pad is approximately +10V.
Detailed Description of
Software
To start the MAX5312 EV kit software, double-click the
MAX5312 EV kit icon that is created during installation.
The GUI main window appears as shown in Figure 1.
The
Software Control
group box located at the left of
the window controls the DAC registers through the SPI
interface. The
Hardware Control
group box located at
the right of the window controls the
CLR, LDAC,
UNI/BIP, and
SHDN
pins of the MAX5312 by the GPIOs
of the microcontroller. The
SPI Interface
group box at
the top right allows the user to transfer SPI commands
by entering the commands in the edit box.
Evaluates: MAX5312
Software Control
Use the
Software Control
group box to set the output-
voltage values for the DAC. Measure the actual refer-
ence voltage on the REF pin of the MAX5312 and enter
the values into the
Voltage Reference
edit box. These
values will be used to calculate the expected output-
voltage values of the DAC.
Figure 1. MAX5312 EV Kit Software Main Window
_______________________________________________________________________________________
3
MAX5312 Evaluation Kit
Evaluates: MAX5312
Use the
DAC
scrollbar to set the 12-bit DAC data. The
adjacent label at the right of the scrollbar displays the
equivalent expected output-voltage values of the DAC.
Press the
Load input register
button to load the DAC
data into the input register of the MAX5312 (DAC out-
put unchanged). To load the input and DAC registers,
press the
Load input and DAC registers
button (DAC
output updated). To load the DAC register from the
input register, press the
Load DAC register from
input register
button (DAC output updated). Press the
Enter Shutdown Mode
button to put the MAX5312 into
shutdown mode. To exit shutdown mode, press the
Exit Shutdown Mode
button.
SPI Interface
Within the
SPI Interface
group box, the
Status
group
box displays the last command that is sent to the
MAX5312.
Use the
Send Command
group box to manually enter
the SPI command in hex format in the edit box and
send the command to the MAX5312 by pressing the
Send
button.
Detailed Description of
Hardware
The MAX5312 EV kit board provides a proven layout for
evaluating the MAX5312. The EV kit comes with the
MAX5312EAE+ installed.
Hardware Control
The
Hardware Control
group box controls the signals
on the
CLR, LDAC,
UNI/BIP, and the
SHDN
pins
through the GPIO pins of the microcontroller. By
default, the signals on
CLR, LDAC,
and
SHDN
are high
and the signal on UNI/BIP is low.
Press the
Clear the input and DAC registers (/CLR)
button to generate a negative pulse on the
CLR
pin and
asynchronously clear the input and DAC registers. The
DAC output is set to 0V in unipolar or bipolar mode.
Press the
Update the DAC register (/LDAC)
button to
generate a negative pulse on the
LDAC
pin and asyn-
chronously load the DAC register from the input regis-
ter. The DAC output immediately updates with the data
from the input register.
In the
UNI//BIP
group box, select the
Bipolar Mode
radio button to evaluate bipolar mode. Select the
Unipolar Mode
radio button to evaluate unipolar mode.
In the
/SHDN
group box, select the
Enter Shutdown
Mode
radio button to set the
SHDN
pin low to eval-
uate the shutdown mode and reduce the current con-
sumption. Select the
Exit Shutdown Mode
radio
button to set the
SHDN
pin high and resume normal
operation. Hardware control takes precedence over
software control.
Voltage Reference
By default, the on-board MAX6126 +5V external refer-
ence is connected to the REF pin of the MAX5312. To
use an external voltage reference, place the shunts of
JU10 to the 2-3 position. Attach the external reference
between +2V and +5.25V to the REF pad. Adjust the
Voltage Reference
values in the program.
User-Supplied Signals
To use the MAX5312 EV kit with an external SPI inter-
face, install the shunts of JU1, JU4, JU5, and JU6 to
the 2-3 position. Connect the SCLK, DIN,
CS,
DOUT,
VCC, and GND lines from the external SPI interface to
the corresponding pads on the MAX5312 EV kit.
To apply the external signals to the
SHDN
and UNI/BIP
pins of the MAX5312, install the shunts of JU2 and JU3
to the 2-3 position. Connect the external signals to the
SHDN
and UNI/BIP pads on the MAX5312 EV kit.
Optimal Measurement
To have the optimal measurements of the DAC output
voltage, use an external power supply. After program-
ming the output voltage for the DAC, disconnect the
USB cable from the EV kit to eliminate any noise com-
ing from the USB, and measure the output.
4
_______________________________________________________________________________________
MAX5312 Evaluation Kit
Evaluates: MAX5312
Table 1. MAX5312 EV Kit Jumper Descriptions (JU1–JU8, JU10)
JUMPER
JU1
JU2
JU3
JU4
JU5
JU6
JU7
JU8
JU10
SHUNT POSITION
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
1-2*
2-3
DESCRIPTION
VCC connected to on-board digital supply
Connects the external VCC to the VCC pad
SHDN
signal connected to on-board microcontroller
Connect external
SHDN
signal to the on-board
SHDN
pad
UNI/BIP signal connected to on-board microcontroller
Connect external UNI/BIP signal to the on-board UNI/BIP pad
SCLK signal connected to on-board microcontroller
Connect external SCLK signal to the on-board SCLK pad
DIN signal connected to on-board microcontroller
Connect external DIN signal to the on-board DIN pad
CS
signal connected to on-board microcontroller
Connect external
CS
signal to the on-board
CS
pad
CLR
signal connected to on-board microcontroller
Connect external
CLR
signal to the on-board
CLR
LDAC
signal connected to on-board microcontroller
Connect external
LDAC
signal to the on-board
LDAC
pad
REF connected to on-board +5V reference
Connect external reference to the on-board REF pad
*Default position.
_______________________________________________________________________________________
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
