19-4075; Rev 0; 3/08
MAX5550 Evaluation Kit
General Description
The MAX5550 evaluation kit (EV kit) provides a proven
design to evaluate the MAX5550 dual, 10-bit, program-
mable, 30mA, high-output-current DACs. The EV kit
also includes Windows 2000/XP/Vista
®
-compatible soft-
ware that provides a simple graphical user interface
(GUI) for exercising the features of the MAX5550.
The MAX5550 EV kit printed-circuit board (PCB) comes
with a MAX5550ETE+ installed. Contact the factory for
free samples of the pin-compatible MAX5548ETE+.
Features
♦
Windows 2000/XP/Vista (32-Bit)-Compatible
Software
♦
Supports SPI™ or I
2
C interface
♦
USB-PC Connection (Cable Included)
♦
USB Powered
♦
4-Pin DAC Output Signal Header
♦
Accepts Through-Hole Current-Setting Resistors
♦
Optional 1.25V On-Board Reference (MAX6161)
♦
Proven PCB Layout
♦
Lead-Free and RoHS-Compliant
♦
Fully Assembled and Tested
Evaluates: MAX5550/MAX5548
Ordering Information
PART
MAX5550EVKIT+
TYPE
EV Kit
+Denotes
lead-free and RoHS-compliant.
Component List
DESIGNATION
C1, C3–C10,
C17, C21,
C23–C26
C2, C13, C15,
C22, C27
QTY
15
DESCRIPTION
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104K
10µF ±20%, 6.3V X5R ceramic
capacitors (0805)
TDK C2012X5R0J106M
10pF ±5%, 50V C0G ceramic
capacitors (0603)
TDK C1608C0G1H100J
1µF ±20%, 6.3V X5R ceramic
capacitors (0603)
TDK C1608X5R0J105K
22pF ±5%, 50V C0G ceramic
capacitors (0603)
TDK C1608C0G1H220J
3300pF ±10%, 50V X7R ceramic
capacitor (0603)
TDK C1608X7R1H332K
Green LED (0603)
0
Ω
±5% resistor (0603)
Not installed
Dual-row (2 x 2) 4-pin header
U2
1
DESIGNATION
H3
JUA–JUE
JU1–JU4
JU5, JU6, JU7
P1
R1
R2
R3
R4, R10, R11
R5
R6, R7
R8, R9
R12, R13
R16
U1
QTY
1
0
4
3
1
1
1
1
3
1
2
2
0
0
1
DESCRIPTION
Dual-row (2 x 5) 10-pin header
Not installed
3-pin headers
5-pin headers
USB type-B right-angle female
receptacle
0Ω ±5% resistor (0603)
220Ω ±5% resistor (0603)
10kΩ ±5% resistor (0603)
2.2kΩ ±5% resistors (0603)
1.5kΩ ±5% resistor (0603)
27Ω ±5% resistors (0603)
20kΩ ±1% resistors (through hole)
Not installed, resistors (0603)
Not installed, resistor (0402)
Dual high-output-current DAC
(16 TQFN-EP*, 3mm x 3mm x 0.8mm)
Maxim MAX5550ETE+
Microcontroller
(68 QFN-EP*, 10mm x 10mm)
Maxim MAXQ2000-RAX+
5
C11, C12
2
C14, C16
2
C18, C19
2
C20
D1
FB1
H1
H2
1
1
1
0
1
Windows Vista is a registered trademark of Microsoft Corp.
SPI is a trademark of Motorola, Inc.
________________________________________________________________
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.
MAX5550 Evaluation Kit
Evaluates: MAX5550/MAX5548
Component List (continued)
DESIGNATION
U3
QTY
1
DESCRIPTION
93C46 type 3-wire EEPROM 16-bit
architecture (8 SO)
Atmel AT93C46A-10SU-2.7
UART-to-USB converter
(32 TQFP-32L, 7mm x 7mm)
FTDI FT232BL
3.3V regulator (5 SC70)
Maxim MAX8511EXK33+T
(Top Mark: AEI)
2.5V regulator (5 SC70)
Maxim MAX8511EXK25+T
(Top Mark: ADV)
DESIGNATION
U7
U8
Y1
Y2
—
—
—
QTY
1
1
1
1
7
1
1
DESCRIPTION
Dual SPDT (10 µMAX
®
)
Maxim MAX4636EUB+
1.25V reference (8 SO)
Maxim MAX6161AESA+
16MHz crystal (HCM49)
6MHz crystal (HCM49)
Shunts
USB high-speed A-to-B cable, 6ft
PCB: MAX5550 Evaluation Kit+
U4
1
U5
1
U6
1
*EP = Exposed pad.
Component Supplier
SUPPLIER
TDK Corp.
PHONE
847-803-6100
WEBSITE
www.component.tdk.com
Note:
Indicate that you are using the MAX5550 or MAX5548 when contacting this component supplier.
MAX5550 EV Kit Files
FILE
INSTALL.EXE
MAX5550.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
µMAX is a registered trademark of Maxim Integrated Products, Inc.
2
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MAX5550 Evaluation Kit
Quick Start
Required Equipment
Before beginning, the following equipment is needed:
• MAX5550 EV kit (USB cable included)
• A user-supplied Windows 2000/XP/Vista-compatible
PC with a spare USB port
• Two digital multimeters (DMMs) for current
measurement
Optional external power supply for enhanced
performance (USB powered)
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.
•
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.
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\MAX5550
(default installation
directory) using the
Browse
button. During device
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 for additional information.
6) Start the MAX5550 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.
7) To measure the OUTA current, connect the first
DMM between H2-1 (OUTA) and H2-2 (GND).
8) To measure OUTB current, connect the second
DMM between H2-3 (OUTB) and H2-4 (GND).
9) Enter 0x200 into the
D9 – D0 (Shift Register Data
Bits)
edit box.
10) Press the lowest
Load DACA and DACB
button
located at the bottom of the EV kit software main
window. This will load DACA and DACB input and
output DAC registers from the shift register.
11) Verify that the current shown on both DMMs is
approximately 1mA.
Evaluates: MAX5550/MAX5548
Procedure
The MAX5550 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
1) Visit www.maxim-ic.com/evkitsoftware to download
the latest version of the EV kit software,
5550Rxx.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–JU7) are in their default
1-2 positions, as shown in Table 1.
4) Connect the USB cable from the PC to the EV kit
board. A
Building Driver Database
window pops
up in addition to a
New Hardware Found
message
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3
MAX5550 Evaluation Kit
Evaluates: MAX5550/MAX5548
Table 1. MAX5550 EV Kit Jumper Descriptions (JU1–JU7)
JUMPER
JU1
JU2
SHUNT
POSITION
1-2*
2-3
1-2*
2-3
1-2*
JU3
2-3
1-2*
JU4
2-3
Open
1-2*
JU5
1-3
1-4
1-5
1-2*
JU6
1-3
1-4
1-5
1-2*
JU7
1-3
1-4
1-5
DESCRIPTION
MAX5550 SCLK/SCL signal connected to on-board microcontroller
MAX5550 SCLK/SCL signal connected to on-board header H3
MAX5550 DIN/SDA signal connected to on-board microcontroller
MAX5550 DIN/SDA signal connected to on-board header H3
MAX5550 VDD is set to the on-board 3.3V supply powered from the USB port
Connect an external 2.7V to 5.25V supply to the VCC pad.
See the
User-Supplied Power
Supply
section.
REFIN = 1.25V from the on-board external reference (MAX6161)
REFIN = external voltage applied to the on-board REFIN pad
Use when in internal reference mode
MAX5550
CS/A0
signal connected to on-board microcontroller
MAX5550
CS/A0
signal connected to GND
MAX5550
CS/A0
signal connected to H3-5 of header H3
MAX5550
CS/A0
signal connected to VDD
MAX5550 DOUT/A1 signal connected to on-board microcontroller
MAX5550 DOUT/A1 signal connected to GND
MAX5550 DOUT/A1 signal connected to H3-9 of header H3
MAX5550 DOUT/A1 signal connected to VDD
MAX5550 SPI/I2C signal connected to on-board microcontroller
MAX5550 SPI/I2C signal connected to GND
MAX5550 SPI/I2C signal connected to H3-7 of header H3
MAX5550 SPI/I2C signal connected to VDD
*Default position.
4
_______________________________________________________________________________________
MAX5550 Evaluation Kit
Detailed Description of
Software
The main window of the evaluation software (Figure 1)
displays the current and code for all DAC input and
output registers. In addition, the main window has two
tabs. The
Load DACs
tab controls all the DAC loading
features of the MAX5550. The
Operating Modes
tab
(Figure 2) controls all the DAC modes of the
MAX5550. The
Load Setting(s)
buttons must be
pressed in order to write the corresponding mode set-
tings to the DAC(s).
Evaluates: MAX5550/MAX5548
Figure 1. MAX5550 EV Kit Software Main Window (Load DACs Tab)
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