MAX5394M Evaluation Kit
Evaluates: MAX5394L—MAX5394N
General Description
The MAX5394M evaluation kit (EV kit) demonstrates
the MAX5394M single, 256-tap volatile, low-voltage lin-
ear digital potentiometer. The device comes in an 8-pin
TDFN-EP package. The EV kit provides controls to adjust
the wiper and shutdown modes.
The digital potentiometer is controlled by an on-board
MAXQ
®
microcontroller that provides an SPI interface.
The EV kit features Windows XP
®
-, Windows Vista
®
-,
and Windows
®
7-compatible software that provides a
simple graphical-user interface (GUI) for exercising the
device features.
The EV kit comes with the MAX5394MATA+ (50kΩ
end-to-end resistance) installed. Contact the factory for
samples of the pin-compatible MAX5394LATA+ (10kΩ
end-to-end resistance) and MAX5394NATA+ (100kΩ
end-to-end resistance).
Features
● 1.7V to 5.5V Wide Input Supply Range
● Supports All SPI Family of Devices: 10kΩ, 50kΩ, and
100kΩ End-to-End Resistance
● On-Board Microcontroller to Generate SPI
Commands
● Windows XP-, Windows Vista-, and Windows
7-Compatible Software
● USB-Powered (Cable Included)
● Fully Assembled and Tested with Proven PCB Layout
Ordering Information
appears at end of data sheet.
Component List
DESIGNATION
BYP,
CS|ADDR0|CS/L,
DIN|SDA|UD, H, L,
QPEDB|ADDR1,
SCLK|SCL|INC/L, W
B_INC/L
C1, C3, C23
QTY
DESCRIPTION
DESIGNATION
C21
8
White test points
C25
1
3
Pushbutton switch
0.1µF ±10%, 16V X7R
ceramic capacitors (0603)
TDK C1608X7R1C104K
100pF ±5%, 50V C0G
ceramic capacitor (0603)
Murata GQM1885C1H101J
1µF ±10%, 16V X5R
ceramic capacitors (0603)
Murata GRM188R61C105K
18pF ±5%, 50V C0G
ceramic capacitors (0603)
Murata GRM1885C1H180J
GND
J1
J2
J3
JU1
JU2
JU3, JU4
JU5
JU6, JU7
JU_ID0–JU_ID3
L1
R1–R3, R5–R9
0
1
1
0
1
1
1
2
1
2
0
1
8
QTY
1
DESCRIPTION
1000pF ±10%, 50V X7R
ceramic capacitor (0603)
Murata GRM188R71H102K
Not installed, ceramic
capacitor (0603)
Black test point
USB type-B right-angle
PC-mount receptacle
Not installed,
10-pin (2 x 5) header
4-pin header
3-pin header
5-pin header
10-pin (2 x 5) headers
4-pin header
2-pin headers
Not installed. 2-pin headers
Ferrite bead (0603)
TDK MMZ1608R301A
4.7kΩ ±5% resistors (0603)
C2
1
C5–C18, C24
15
C19, C20
2
MAXQ is a registered trademark of Maxim Integrated Products,
Inc.
Windows, Windows XP, and Windows Vista are registered trade-
marks and registered service marks of Microsoft Corporation.
19-6708; Rev 0; 5/13
MAX5394M Evaluation Kit
Evaluates: MAX5394L—MAX5394N
Component List (continued)
DESIGNATION
R12
R13
SW_A0, SW_A1,
SW_UD
TP1–TP3
U1
U2
U3–U5
U7
QTY
1
1
3
0
1
0
3
1
DESCRIPTION
100Ω ±5% resistor (0603)
10kΩ ±5% resistor (0603)
DIP switches
Not installed, test points
50kΩ SPI digital
potentiometer (8 TDFN-EP*)
Maxim MAX5394MATA+
Not installed, digital
potentiometer (10 µMAX
®
)
Level translators (10 µMAX)
Maxim MAX1840EUB+
Microcontroller (64 LQFP)
Maxim MAXQ622G-0000+
DESIGNATION
U8
U9
U10
VDD
Y1
—
—
—
*EP
= Exposed pad.
QTY
1
1
0
1
1
1
6
1
DESCRIPTION
3.3V LDO (5 SC70)
Maxim MAX8511EXK33+
1.8V LDO (5 SC70)
Maxim MAX8511EXK18+
Not installed, ESD protector
(6 SOT23)
Red test point
12MHz crystal (HCM49)
USB high-speed A-to-B
cables, 6ft
Shunts
PCB: MAX5394M EVKIT
Component Suppliers
SUPPLIER
Murata Americas
TDK Corp.
PHONE
800-241*6574
847-803-6100
WEBSITE
www.murataamericas.com
www.component.tdk.com
Note:
Indicate that you are using the MAX5394M when contacting these component suppliers.
MAX5394M EV Kit Files
FILES
INSTALL.EXE
MAX539XVxx.EXE
USBConverterDLL.DLL
UNINSTALL.EXE
DESCRIPTION
Installs the EV kit files on your
computer
Application program
Application library
Uninstalls the EV kit software
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
1) Verify that all jumpers are in their default positions, as
shown in Table 1.
2) Set the DVM to measure resistance. Connect the
negative terminal of the DVM to the L test point and
connect the positive terminal to the W test point.
3) Visit
www.maximintegrated.com/evkitsoftware
to
download the latest version of the EV kit software,
MAX539XGUISetupVxx.ZIP. Save the EV kit software
to a temporary folder and uncompress the ZIP file.
4) Install the EV kit software on your computer by run-
ning the INSTALL.EXE program inside the temporary
folder. The program files are copied to your PC and
icons are created in the Windows
Start | Programs
menu.
5) Connect the USB cable from the PC to the EV kit
board; the USB driver is installed automatically.
Quick Start
Required Equipment
● MAX5394M EV kit (USB cable included)
● Windows XP, Windows Vista, or Windows 7 PC with a
spare USB port
● Digital voltmeter (DVM)
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.
µMAX is a registered trademark of Maxim Integrated Products,
Inc.
www.maximintegrated.com
Maxim Integrated
│
2
MAX5394M Evaluation Kit
Evaluates: MAX5394L—MAX5394N
6) Start the EV kit software by opening its icon in the
Start | Programs
menu. The EV kit software main
window appears, as shown in Figure 1.
7) Move the wiper scrollbar up until the edit box shows
255.
8) Press the
H = Open, W = Unchanged
button in the
Standby Commands
group box.
9) Verify that the DVM measures 50kΩ.
Figure 1. MAX5394M EV Kit Software Main Window
www.maximintegrated.com
Maxim Integrated
│
3
MAX5394M Evaluation Kit
Evaluates: MAX5394L—MAX5394N
Detailed Description of Software
Wiper
The MAX5394M EV kit software provides controls to
adjust the wiper and shutdown modes.
The wiper register stores an 8-bit data that ranges from
0–255. There are two ways of changing the wiper register.
First is by using the vertical scrollbar, and the other way
is through pressing the up-down arrows to the right of the
edit box. Numbers in the edit box can be in decimal or
hexadecimal format by selecting the corresponding radio
buttons in the
Number Format
group box.
supply voltage with charge pump disabled is limited to
2.6V and the terminal voltage cannot exceed -0.3V to
(V
DD
+ 0.3V).
Detailed Description of Hardware
The MAX5394M EV kit provides a proven layout for the
MAX5394M. An on-board MAXQ622 microcontroller and
jumpers to disconnect the on-board microcontroller are
included on the EV kit.
User-Supplied Power Supply
Standby Commands
The buttons within the
Standby Commands
group box
allows the user to change the H, W, or L terminals to
open with the wiper position set to zero code, mid code,
full code, or the value contained in the wiper register. The
Clear Standby
button is used to remove any shutdown
conditions and return the wiper register to its original
stored value. Refer to the MAX5394 IC data sheet for a
detailed description of the standby commands.
The EV kit is powered completely from the USB port by
default. To power the device with a user-supplied power
supply, move the shunt on jumper JU1 to the 2-3 position
and apply a 1.7V to 5.5V power supply at the VDD test
point and the GND test point on the EV kit.
To evaluate the EV kit with a user-supplied SPI bus, move
the shunt on jumper JU2 to the 1-4 position, jumper JU3 to
the 7-8 position, and jumper JU4 to the 7-8 position. Apply
the user-supplied
CS
to the
CS|ADDR0|CS/L
test point,
the user-supplied DIN to the DIN|SDA|UD test point, and
the user-supplied SCLK to the SCLK|SCL|INC/L test point.
User-Supplied SPI
Reset
Press the
Reset
button to return to the POR settings. This
resets the wiper register to midscale (0x80), enables the
charge pump, and deasserts any shutdown modes.
User-Supplied H and L
Charge Pump
Press the
QP ON
button in the
SPI Commands
group
box to enable the internal charge pump that allows low-
supply voltage operation. To disable the internal charge
pump, press the
QP OFF
button. The device’s minimum
Remove the shunts from jumpers JU6 and JU7 and apply
a user-supplied voltage at the H and L test points. The
voltage range for H and L is 0 to 5.25V and is independent
of the V
DD
operating voltage.
www.maximintegrated.com
Maxim Integrated
│
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MAX5394M Evaluation Kit
Evaluates: MAX5394L—MAX5394N
Table 1. EV Kit Jumper Settings
JUMPER
JU1
SHUNT POSITION
1-2*
1-3
1-2*
1-3
JU2
1-4
1-5
1-2*
3-4
JU3
5-6
7-8
9-10
1-2*
3-4
JU4
5-6
7-8
9-10
Installed*
JU6
Not installed
Installed*
JU7
*Default position.
Not installed
DESCRIPTION
Connects the V
DD
pin of the U1 device to the on-board 1.8V supply.
Connects the V
DD
pin of the U1 device to a user-supplied power supply between 1.7V to 5.5V.
Connects the
CS
pin of the U1 device to the
CS
signal of the on-board microcontroller.
Do not install.
Connects the
CS
pin of the U1 device to a user-supplied
CS
signal. Apply appropriate signal to
the
CS|ADDR0|CS/L
test point.
Do not install.
Connects the DIN pin of the U1 device to the DIN signal of the on-board microcontroller.
Do not install.
Do not install.
Connects the DIN pin of the U1 device to a user-supplied DIN signal. Apply appropriate signal
to the DIN|SDA|UD test point.
Do not install.
Connects SCLK pin of the U1 device to the SCLK signal of the on-board microcontroller.
Do not install.
Do not install.
Connects the SCLK pin of the U1 device to a user-supplied SCLK signal. Apply appropriate
signal to the SCLK|SCL|INC/L test point.
Do not install.
Connects the H pin to the V
DD
pin of the U1 device.
User-supplied H. The user must apply a voltage at the H test point. The voltage range for the H
pin is 0 to 5.25V.
Connects the L pin of the U1 device to ground.
User-supplied L. The user must apply a voltage at the L test point. The voltage range for the L
pin is 0 to 5.25V.
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