19-5104; Rev 0; 12/09
MAX5391L/MAX5391N Evaluation Systems
The MAX5391L and MAX5391N evaluation kits (EV kits)
are fully assembled and tested PCBs that feature the
MAX5391L (10kI) and MAX5391N (100kI) dual digital
potentiometers, respectively. The MAX5391L/MAX5391N
dual volatile potentiometers communicate through an
SPIK-compatible 3-wire serial interface.
The MAX5391LEVMINIQU+ and MAX5391NEVMINIQU+
evaluation systems (EV systems) include the MAX5391L
EV kit and MAX5391N EV kit, respectively, and a
MINIQUSB+ interface board. The MINIQUSB+ interface
board can be used to enable PC communication through
the USB interface. WindowsM 2000-, Windows XPM-,
and Windows VistaM-compatible software provides a
professional user interface for exercising the MAX5391L/
MAX5391N features. The program is menu-driven and
offers a graphical user interface (GUI) complete with
buttons, track bars, and edit boxes. The EV kit software
can be used to evaluate the MAX5386M, MAX5393, and
MAX5388. The EV kits can also be interfaced directly to
a user-supplied 3-wire system.
The MAX5391L/MAX5391N ICs can be powered from
a 1.7V, 2.6V, 3.3V, or 5V source generated from the
MINIQUSB+ interface board and EV kit circuitry, or a usersupplied external 1.7V to 5.25V DC power supply. Order
the MAX5391LEVMINIQU+ or MAX5391NEVMINIQU+
EV system for a PC-based evaluation of the MAX5391L
or MAX5391N, respectively.
The EV kits also contain PCB footprints for the MAX5386M,
MAX5388, and MAX5393. To evaluate these parts,
order samples and install the ICs on U1, U4, and U3,
respectively.
Features
S 1.7V to 5.25V Single-Supply Operation
S PC-USB to 3-Wire Interface or Stand-Alone 3-Wire
Serial-Interface Operation
S Easy-to-Use Menu-Driven Software
S Includes Windows 2000-, Windows XP-, and
Windows Vista-Compatible Software
S Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX5391LEVMINIQU+
EV System
MAX5391NEVMINIQU+
EV System
+Denotes lead(Pb)-free and RoHS compliant.
Component Lists
MAX5391L EV System
(MAX5391LEVMINIQU+)
PART
EV kit
MINIQUSB+
1
Maxim command module
MAX5391N EV System
(MAX5391NEVMINIQU+)
PART
QTY
DESCRIPTION
MAX5391NEVKIT+
1
EV kit
MINIQUSB+
1
Maxim command module
MAX5391L/MAX5391N EV Kits
C1, C2, C3, C7,
C10, C11, C14,
C15, C19, C20,
C23, C24, C25
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
DESCRIPTION
1
DESIGNATION
SPI is a trademark of Motorola, Inc.
QTY
MAX5391LEVKIT+
QTY
DESCRIPTION
13
1FF Q10%, 16V X5R ceramic
capacitors (0603)
Murata GRM188R71C105K or
TDK C1608X5R1C105K
C4, C8,
C12, C16
4
0.1FF Q10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K or
TDK C1608X7R1H104K
C5, C6,
C9, C13
0
Not installed, ceramic capacitors
(0603)
1
10FF Q10%, 6.3V X5R ceramic
capacitor (0805)
Murata GRM21BR60J106K or
TDK C2012X5R0J106K
C26
________________________________________________________________ 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.
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
General Description
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
MAX5391L/MAX5391N Evaluation Systems
Component Lists (continued)
MAX5391L/MAX5391N EV Kits (continued)
DESIGNATION
QTY
J1
1
2 x 4-pin header
J2
1
2 x 8-pin header
J3
1
8-pin female receptacle
JU1, JU3–JU6,
JU8–JU18
16
2-pin headers
JU2, JU7, JU19
3
3-pin headers
JU20
1
4-pin header
R1
1
40.2kI Q1% resistor (0603)
R2
1
100kI Q1% resistor (0603)
U1
0
Not installed, dual digital
potentiometer (16 TQFN-EP*)
U2
1
See the EV Kit-Specific
Component List
0
Not installed, digital
potentiometer (14 TSSOP)
0
Not installed, digital
potentiometer (10 FMAXM)
U3
U4
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
U5
1
Adjustable output LDO regulator
(5 SC70)
Maxim MAX8512EXK+
(Top Mark: ADW)
U6
1
2.6V LDO regulator (5 SC70)
Maxim MAX8511EXK26+
(Top Mark: AAW)
U7
1
Single 1.8V to 5V level translator
(6 SC70)
U8
1
Dual 1.8V to 5V level translator
(8 SSOP)
—
20
Shunts (JU1–JU20)
—
1
PCB: MAX5386/5388/5391/5393
EVALUATION KIT+
*EP = Exposed pad.
EV Kit-Specific Component List
PART
DESIGNATION
MAX5391LEVKIT+
U2
MAX5391NEVKIT+
DESCRIPTION
256-tap 10kI digital potentiometer (16 TQFN-EP*)
Maxim MAX5391LATE+
(Top Mark: AHJ)
256-tap 100kI digital potentiometer (16 TQFN-EP*)
Maxim MAX5391NATE+
(Top Mark: AHL)
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Murata Electronics North America, Inc.
770-436-1300
www.murata-northamerica.com
TDK Corp.
847-803-6100
www.component.tdk.com
Note: Indicate that you are using the MAX5386M, MAX5388, MAX5391, or MAX5393 when contacting these component suppliers.
µMAX is a registered trademark of Maxim Integrated
Products, Inc.
2 _______________________________________________________________________________________
MAX5391L/MAX5391N Evaluation Systems
4)
Connect the multimeters to measure voltages
across the MAX5391L/MAX5391N (U2) WA and LA
PCB pads and WB and LB PCB pads.
5)
Connect the MINIQUSB+ interface board to the EV
kit J2 and J3 connectors.
6)
Connect the included USB cable from the PC to
the MINIQUSB+ interface board. A Building Driver
Database window pops up in addition to a New
Hardware Found message 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 privileges are required
to install the USB device driver on Windows 2000,
Windows XP, and Windows Vista.
7)
The MAX5391L/MAX5391N EV kits are fully assembled
and tested. Follow the steps below to verify board operation:
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\MAX5391L or C:\Program Files\
MAX5391N (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 document included with
the software if you have problems during this step.
8)
Start the EV kit software by opening its icon in the
Start | Programs menu.
1)
9)
Observe as the program automatically detects the
USB connection and starts the main program.
FILE
DESCRIPTION
INSTALL.EXE
MAX5391L.EXE
MAX5391N.EXE
Installs the EV kit files on the
computer
Application programs
FTD2XX.INF
USB driver file
UNINST.INI
Uninstalls the EV kit software
USB_Driver_Help.PDF
USB driver installation help file
Quick Start
Required Equipment
• MAX5391L or MAX5391N EV system
MAX5391L/MAX5391N EV kit
MINQUSB+ command module (USB cable
included)
• User-supplied Windows 2000, Windows XP, or
Windows Vista PC with a spare USB port
• One or two multimeters
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
2)
3)
Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 5391_
Rxx.ZIP. Save the EV kit software to a temporary
folder and uncompress the ZIP file.
Install the EV kit software on the computer by running the INSTALL.EXE program inside the temporary folder. The program files are copied and icons
are created in the Windows Start | Programs menu.
10) Using the Device Connected combo box, select
MAX5391 from the list and then press the Default
button. The EV kit software main window appears,
as shown in Figure 1.
11) The EV kit is now ready for additional testing.
Verify that shunts are correctly installed on the
jumpers, as listed in Table 1, for proper operation
of the EV kit.
_______________________________________________________________________________________ 3
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
MAX5391L/MAX5391N
EV Kit Files
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
MAX5391L/MAX5391N Evaluation Systems
Table 1. Jumper Configuration for MAX5391L/MAX5391N EV Kit Operation
JUMPER
JU1
JU7
JU8
JU9
JU10
JU11
JU20
SHUNT
POSITION
Installed*
Not installed
EV KIT FUNCTION
1.7V LDO output enabled
1.7V LDO output disabled
1-2*
MAX5391L/MAX5391N VDD voltage = 1.7V
2-3
MAX5391L/MAX5391N VDD voltage dependent on jumper JU20 configuration
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
MAX5391L/MAX5391N HA disconnected from the U2 VDD voltage source
MAX5391L/MAX5391N HA connected to the U2 VDD voltage source
MAX5391L/MAX5391N LA disconnected from GND
MAX5391L/MAX5391N LA connected to GND
MAX5391L/MAX5391N HB disconnected from the U2 VDD voltage source
MAX5391L/MAX5391N HB connected to the U2 VDD voltage source
MAX5391L/MAX5391N LB disconnected from GND
MAX5391L/MAX5391N LB connected to GND
1-2
VPOWER = 5V
1-3*
VPOWER = 3.3V
1-4
VPOWER = 2.6V
*Default position.
Figure 1. MAX5391L/MAX5391N Evaluation Kit Software Main Window
4 _______________________________________________________________________________________
MAX5391L/MAX5391N Evaluation Systems
Graphical User Interface (GUI) Panel
The EV kit software GUI shown in Figure 1 is a Windows
program that provides a convenient means to control the
MAX5391L and MAX5391N dual potentiometers. Use the
mouse or press the Tab key to navigate through the GUI
controls. The correct SPI write operations are generated
to update the MAX5391L/MAX5391N internal memory
registers when any of these controls are executed.
The software divides the EV kit functions into group
boxes. The Interface group box indicates the EV kit
Status and the last write operation Command Sent and
Data Sent indicators. This data confirms proper device
operation. The Device Connected combo box selects
the Maxim part being evaluated and enables the Update
Pot A and B checkbox function when choosing the
MAX5391 option from the list. The Default button programs both potentiometers to their midscale positions.
The lower Potentiometer A and Potentiometer B group
boxes provide controls to change the respective wiper
positions. The main window’s bottom status bar provides
the USB interface circuit communication status.
Software Startup
Upon startup, the EV kit software automatically searches
for the USB interface board’s circuit connection. In the
Interface group box, the Device Connected combo box
allows the user to select the proper part being evaluated. Upon selection of the device being evaluated, the
Update Pot A and B checkbox is enabled/disabled. The
EV kit enters the normal operating mode when the USB
connection is detected and the part has been selected.
Since the MAX5391L/MAX5391N do not have read capability, all the edit boxes are set to question marks (??)
and the Potentiometer_ track bars are set to midscale.
If the USB connection is not detected, the software
prompts the user to retry, exit the program, or enter the
demo mode.
Demo Mode
The EV kit software enters the demo mode, when the
USB connection is not detected, by selecting Cancel
on the MAX5391L/MAX5391N Evaluation Kit Interface
Circuit pop-up window (Figure 2). The software can also
enter demo mode at any time from the main window by
selecting the Options | Demo Mode menu item. When
in demo mode, all software communication to the EV kit
circuit is disabled; however, most of the software GUI is
functional. Demo mode allows the user to evaluate the
software without hardware connectivity. To exit demo
mode, deselect the Options | Demo Mode menu item.
Potentiometer A and B Wiper Positions
The wiper position track bars (WA, WB) in the
Potentiometer A and Potentiometer B group boxes
are used to independently change the wiper position
between the H_ and L_ end points. Use the computer
mouse or arrow keys to move the wiper position between
the 256 position points. The wiper position can also be
changed by entering the desired integer value in the
edit boxes, or by pressing the up or down arrows in the
respective edit box. A change in the W_ wiper position
track bars, or HW_/WL_ edit boxes, writes to the registers and the wiper position is updated with the data sent.
The wiper position is shown in the HW_ and WL_ edit
boxes. The HW_ edit box shows the wiper position with
respect to the potentiometer H_ end point and the WL_
edit box shows the wiper position with respect to the
potentiometer L_ end point.
Potentiometers A and B can be updated simultaneously
by checking the Update Pot A and B checkbox. When
enabled, the Potentiometer A group box sends the
same data to both digital potentiometers and enables
control of both digital potentiometers together.
Figure 2. MAX5391L/MAX5391N Evaluation Kit Interface Circuit Pop-Up Window
_______________________________________________________________________________________ 5
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
Detailed Description of Software
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
MAX5391L/MAX5391N Evaluation Systems
Factory Default
Pressing the Default button resets potentiometer A and
B wiper positions to the factory-default midscale position.
Status Indicator
The Status indicator in the Interface group box displays
EV Kit Operational when the EV kit enters the normal
operating mode after the USB connection is detected.
If the USB connection is not detected, or when the
software enters the demo mode, the Status indicator
displays Demo Mode. Demo mode is used to exercise
the software without hardware connectivity.
Command Sent Indicator
The Command Sent indicator in the Interface group
box displays the last command sent from the master
(software) to the MAX5391L/MAX5391N IC. There are
three commands available in the MAX5391L/MAX5391N
IC, which are listed in Table 2.
Data Sent Indicator
The Data Sent indicator displays the last data sent for
the write to potentiometer A (0x00), potentiometer B
(0x01) or both potentiometer (0x03) commands. The
MAX5391L/MAX5391N ICs use an 8-bit (MSBs, D7:0)
data byte to set the wiper position. Refer to the MAX5391/
MAX5393 IC data sheet for additional information.
Keyboard Navigation
Press the Tab key to select each GUI control. The selected control is indicated by a dotted outline. Using Shift
+ Tab moves the selection to the previously selected
control. Buttons respond to the keyboard’s space bar
and some controls respond to the keyboard’s up and
down arrow keys. Activate the program’s menu bar by
pressing the F10 key and then pressing the letter of the
desired menu item. Most menu items have one letter
underlined, indicating their shortcut key.
When a number is entered into the edit boxes, it is sent to
the device by pressing the Enter key. It is also sent when
Tab or Shift + Tab is pressed.
Simple SPI Commands
There are two methods for communicating with the EV
kit, through the normal user-interface panel (Figure 1),
or through the SPI commands available by selecting the
3-Wire Interface utility from the main program’s Options
| Advanced Users Interface menu bar. A window is
displayed (Figure 3) that allows SPI send/receive data
operations.
On the 3-wire interface tab, the Connection group box
defines the hardware connections of the interface. For
the EV kit, K10 is selected from the Clock (SCK)(SCLK)
drop-down list, K12 from the Data from master to slave
(MOSI)(DIN) drop-down list, K11 from the Data from
slave to master (MISO)(DOUT) drop-down list, K9 from
the Chip-select (CS) for data framing drop-down list,
and the Use standard connections for high-speed SPI
checkbox is checked (see Figure 3).
The Configuration group box allows the user to configure the logic level and data rate. For the EV kit, check the
Send & Receive MSB first checkbox and verify that the
CPOL=1(clock idles high) and CPHA=1(sample 2nd
edge) checkboxes are unchecked (see Figure 3).
The Send and Receive Data group box allows the
user to send data to the MAX5391L/MAX5391N. The
Data bytes to be written edit box indicates data to
be sent from the master (microcontroller) to the device
(MAX5391L or MAX5391N). Eight-bit hexadecimal numbers should be comma delimited. Press the Send Now
button to transmit the data from the master to the device.
Data appearing in the Data bytes received edit box is
data read from the device. The Data bytes received edit
box in the EV kit software always shows a default value of
0xFF since the MAX5391L/MAX5391N do not send data
back to the master.
Note: The SPI dialog boxes accept numeric data in
hexadecimal format. Hexadecimal numbers must be
prefixed by $ or 0x. Figure 3 shows a simple SPI writebyte operation using the included 3-wire interface diagnostics tool. In this example, the software is sending
command 0x11 (write to potentiometers A and B) and
data 0x7F. The data sequence sets potentiometer A and
B wiper positions to 127.
6 _______________________________________________________________________________________
MAX5391L/MAX5391N Evaluation Systems
COMMAND
MAX5391L/
MAX5391N
REGISTER
BINARY
HEX
VREGA
00000000
0x00
SPI data is written to potentiometer A. Wiper WA position updates with SPI data.
VREGB
00000001
0x01
SPI data is written to potentiometer B. Wiper WB position updates with SPI data.
VREGAB
00000011
0x03
SPI data is written to potentiometers A and B. Wipers WA and WB position
updates with SPI data.
DESCRIPTION
Figure 3. Simple Low-Level 3-Wire Interface
_______________________________________________________________________________________ 7
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
Table 2. MAX5391L/MAX5391N SPI Command
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
MAX5391L/MAX5391N Evaluation Systems
General Troubleshooting
Problem: Software reports it cannot find the interface
circuit
•
Is the USB cable connected to the MINIQUSB+
board?
•
Has Windows plug-and-play detected the board?
Bring up Control Panel->System->Device
Manager, and look at what device nodes are indicated for USB. If there is an Unknown device node
attached to the USB, uninstall it—this forces plugand-play to try again.
•
If using an off-board SPI interface, is the power
ground connected to the EV kit ground (GND) at one
of the header J1 pin connections (J1-2, J1-4, J1-6,
or J1-8)?
Detailed Description of Hardware
The MAX5391L/MAX5391N EV kits are assembled and
tested PCBs that feature the MAX5391L and MAX5391N
dual digital potentiometers. Potentiometers A and B
have an end-to-end resistance of 10kI (MAX5391L) and
100kI (MAX5391N). Each wiper can be programmed
independently among 256 tap positions. Each EV kit
uses a MAX5391L or MAX5391N IC in a 16-pin thin QFN
package on a proven two-layer PCB design.
The EV kits provide connector J1 to interface with the
MAX5391L/MAX5391N CS, DIN, SCLK, and GND signals
directly to a user-supplied 3-wire system. Connector J1
also provides a connection for the EV kit’s 1.7V to 5.5V
VPOWER power-supply input.
Table 3. VPOWER Rail (JU20)
The EV kits are typically used with a MINIQUSB+ interface board for communicating with a PC through the
3-wire serial interface. Logic-level translators (U7 and
U8) provide proper SPI interface translation when using
1.7V to 5.5V to power the MAX5391L/MAX5391N VDD
input.
EV Kit VDD Input Source
The VPOWER rail is typically supplied as 3.3V or 5V by
the MINIQUSB+ interface board circuitry or 2.6V using
LDO regulator U6. LDO regulator U5 output is set to 1.7V
and is powered from the VPOWER rail. The VPOWER rail
and U5 are used to set the MAX5391L/MAX5391N VDD
input to 5V, 3.3V, 2.6V or 1.7V.
Regulator U5 has an adjustable output that can be configured to a different voltage by replacing resistor R1.
Use the following equation to set U5 output voltage:
VOUT
R1 = 10 5 ×
− 1
1.225
where R1 is in ohms and VOUT is the desired U5 output
voltage.
Jumper JU20 selects the source for each EV kit circuit
VPOWER rail. See Table 3 for proper jumper configuration for setting VPOWER rail.
Alternatively, the EV kit’s VDD PCB pad can be used to
supply an external 1.7V to 5.25V to the circuit’s VPOWER
rail by removing the shunt at jumper JU20.
Jumper JU1 enables/disables LDO U5 output. Install a
shunt across JU1 to enable U5 1.7V output. Remove the
shunt at JU1 to disable U5 output. See Table 4 for proper
jumper JU1 configuration.
Table 4. U5 LDO Function (JU1)
SHUNT POSITION
VPOWER RAIL
1-2
5V (MINIQUSB+ circuitry)
SHUNT
POSITION
U5 1.7V OUTPUT
1-3
3.3V (MINIQUSB+ circuitry)
Installed*
Enabled
Not installed
Disabled
1-4
2.6V (LDO U6)
Not installed
External source applied at the
EV kit VDD and GND PCB pads
*Default position.
Note: LDO U6 output is disabled when the MINIQUSB+ board
is not installed at headers J2 and J3.
8 _______________________________________________________________________________________
MAX5391L/MAX5391N Evaluation Systems
SHUNT POSITION
MAX5391L/MAX5391N
VDD PIN
JU7
JU1
JU20
1-2*
Installed*
X
1.7V
1-2
Not
installed
X
Not powered
1-2
5V
1-3
3.3V
2-3
X
1-4
2.6V
Not
installed
External source applied
at the VDD and GND
PCB pads
*Default position.
X = Don’t care.
MAX5391L/MAX5391N VDD
Input Configuration
Jumper JU7 selects the power source for the MAX5391L/
MAX5391N VDD input. Install a shunt across pins 1-2
of jumper JU7 to operate the IC extended VDD input
power supply rail to 1.7V. Install a shunt across pins
2-3 to operate the IC VDD input from the VPOWER rail.
See Table 5 for proper jumper configuration for the
MAX5391L/MAX5391N VDD power-supply input.
SPI Clock and Data-/Chip-Select Inputs
The MAX5391L/MAX5391N features a clock and data-/
chip-select input pins for SPI-compatible communication to control the wiper position. The clock and data-/
chip-select pins can be driven by the MINIQUSB+
interface circuit or the PCB header (J1), along with a
user-supplied external SPI-compatible controller. An
external SPI-compatible controller can be connected to CS (J1-3), DIN (J1-5), SCLK (J1-7), and GND
(J1-2, J1-4, J1-6, J1-8) on header J1 to communicate
with the MAX5391L/MAX5391N IC. When using an external SPI-compatible controller, verify that the MINIQUSB+
interface board has been disconnected from the EV
kit’s J2 and J3 headers. See Table 6 for header J1 pin
assignments.
Potentiometer, Voltage-Divider or
Variable Resistor, with Ground Reference
Each EV kit provides an option to configure the MAX5391L/
MAX5391N as a potentiometer or voltage-divider, open
ended or with ground reference, respectively. Use jumpers JU8 and JU9 for potentiometer A, and jumpers JU10
and JU11 for potentiometer B configurations. Tables 7
and 8 list jumper options for configuring potentiometers
A and B, respectively.
The MAX5391L/MAX5391N can also be configured as a
variable resistor by shorting the H_ and W_ pads together using a wire. When operating as a variable resistor,
any power source connected to the H_, W_, or L_ pads
must be voltage and current limited to the maximum conditions stated in the MAX5391/MAX5393 IC data sheet.
Note: To test the device in resistor mode, the ohmmeter
must be GND referenced to the MAX5391L/MAX5391N.
This can be accomplished by connecting the L_ pin to
GND or the H_ pin to U2 VDD. Resistance can then be
measured between W_ and L_ or W_ and H_ PCB pads.
Evaluating the MAX5386M/MAX5388/
MAX5393 ICs
The MAX5391L and MAX5391N EV kits are populated
with additional PCB footprints (U1, U4, and U3) and various jumpers to evaluate the MAX5386M, MAX5388, and
MAX5393, respectively.
An additional MAX5391L/MAX5391N can be placed at
U1 for evaluation. PCB pads C5 or C6 are available for
the IC BYP input. Use ceramic capacitors less than 1µF
at C5 or C6 for proper operation of the IC charge pump.
Refer to the MAX5386M, MAX5388, or MAX5393 evaluation system data sheets for additional information when
evaluating the MAX5386, MAX5388, or MAX5393 digital
potentiometers.
Table 6. Header J1 Pin Assignments
PIN
SIGNAL
J1-1
VPOWER
J1-2, J1-4, J1-6, J1-8
GND
J1-3
J1-5
CS
DIN
J1-7
SCLK
_______________________________________________________________________________________ 9
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
Table 5. MAX5391L/MAX5391N VDD
Power Source (JU7, JU1, JU20)
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
MAX5391L/MAX5391N Evaluation Systems
Table 7. JU8 and JU9 Jumper Functions (Potentiometer A)
SHUNT POSITION
JU8
HA PAD
JU9
Not installed*
Installed
Not installed
Installed*
Not installed
Installed
Not connected
Connected to
U2 VDD
LA PAD
Not connected
Connected to GND
Not connected
Connected to GND
MAX5391L/MAX5391N FUNCTION
Potentiometer open ended
Potentiometer with GND reference
Voltage-divider open ended
Voltage-divider with GND reference
*Default position.
Table 8. JU10 and J11 Jumper Functions (Potentiometer B)
SHUNT POSITION
JU10
Not installed*
Installed
JU11
Not installed
Installed*
Not installed
Installed
HB PAD
Not connected
Connected to
U2 VDD
LB PAD
Not connected
Connected to GND
Not connected
Connected to GND
MAX5391L/MAX5391N FUNCTION
Potentiometer open ended
Potentiometer with GND reference
Voltage-divider open end
Voltage-divider with GND reference
*Default position.
Table 9. Jumper Configuration (JU1–JU20)
JUMPER
JU1
JU2
JU3
JU4
JU5
JU6
JU7
JU8
JU9
JU10
JU11
SHUNT POSITION
EV KIT FUNCTION
Installed*
1.7V LDO output enabled
Not installed
1.7V LDO output disabled
1-2
MAX5386M voltage = 1.7V
2-3*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
1-2*
2-3
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
MAX5386M VDD voltage dependent on jumper JU20 configuration
MAX5386M HA disconnected from the U1 VDD voltage source
MAX5386M HA connected to the U1 VDD voltage source
MAX5386M LA disconnected from GND
MAX5386M LA connected to GND
MAX5386M HB disconnected from the U1 VDD voltage source
MAX5386M HB connected to the U1 VDD voltage source
MAX5386M LB disconnected from GND
MAX5386M LB connected to GND
MAX5391L/MAX5391N VDD voltage = 1.7V
MAX5391L/MAX5391N VDD voltage dependent on jumper JU20 configuration
MAX5391L/MAX5391N HA disconnected from the U2 VDD voltage source
MAX5391L/MAX5391N HA connected to the U2 VDD voltage source
MAX5391L/MAX5391N LA disconnected from GND
MAX5391L/MAX5391N LA connected to GND
MAX5391L/MAX5391N HB disconnected from the U2 VDD voltage source
MAX5391L/MAX5391N HB connected to the U2 VDD voltage source
MAX5391L/MAX5391N LB disconnected from GND
MAX5391L/MAX5391N LB connected to GND
10
�������������������������������������������������������������������������������������
MAX5391L/MAX5391N Evaluation Systems
JUMPER
JU12
JU13
JU14
JU15
JU16
JU17
JU18
JU19
JU20
SHUNT POSITION
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
Not installed
Installed*
EV KIT FUNCTION
MAX5393 HA disconnected from the U3 VDD voltage source
MAX5393 HA connected to the U3 VDD voltage source
MAX5393 LA disconnected from GND
MAX5393 LA connected to GND
MAX5393 HB disconnected from the U3 VDD voltage source
MAX5393 HB connected to the U3 VDD voltage source
MAX5393 LB disconnected from GND
MAX5393 LB connected to GND
MAX5388 LA disconnected from GND
MAX5388 LA connected to GND
MAX5388 HB disconnected from the U4 VDD voltage source
MAX5388 HB connected to the U4 VDD voltage source
MAX5388 LB disconnected from GND
MAX5388 LB connected to GND
1-2
MAX5393 VDD voltage = 1.7V
2-3*
MAX5393 VDD voltage dependent on jumper JU20 configuration
1-2
VPOWER = 5V
1-3*
VPOWER = 3.3V
1-4
VPOWER = 2.6V
*Default position.
______________________________________________________________________________________ 11
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
Table 9. Jumper Configuration (JU1–JU20) (continued)
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
MAX5391L/MAX5391N Evaluation Systems
Figure 4. MAX5391L/MAX5391N EV Kit Schematic
12
�������������������������������������������������������������������������������������
MAX5391L/MAX5391N Evaluation Systems
Figure 5. MAX5391L/MAX5391N EV Kit Component Placement
Guide—Component Side
Evaluate: MAX5386M/MAX5388/MAX5391/MAX5393
1.0’’
1.0’’
Figure 6. MAX5391L/MAX5391N EV Kit PCB Layout—
Component Side
1.0’’
Figure 7. MAX5391L/MAX5391N EV Kit PCB Layout—
Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009
Maxim Integrated Products
13
Maxim is a registered trademark of Maxim Integrated Products, Inc.
工商网监
湘ICP备2023018690号
