19-0952; Rev 0; 8/07
MAX5488 Evaluation Kit
General Description
The MAX5488 evaluation kit (EV kit) is an assembled
and tested printed-circuit board (PCB) that demon-
strates the functionality of the MAX5488 dual, 256-tap,
nonvolatile, SPI-interface, linear-taper digital poten-
tiometer. Windows
®
98SE/2000/XP-compatible software
provides a handy user interface to exercise the features
of the MAX5488.
The tiny 16-pin, 3mm x 3mm, thin QFN-packaged
device is socketed, allowing for easy evaluation of the
MAX5487 (10kΩ end-to-end resistance), MAX5488
(50kΩ end-to-end resistance), or MAX5489 (100kΩ
end-to-end resistance) ICs. To evaluate the MAX5487
or the MAX5489, request a free sample (ETE suffix)
along with the MAX5488 EV kit.
Features
♦
Power-On Recall of Wiper Position from
Nonvolatile Memory
♦
2.7V to 5.25V Single-Supply Operation
♦
SPI-Compatible Serial Interface
♦
Convenient GUI Software
♦
Labeled Test Points for H_, W_, and L_
♦
Assembled and Tested USB-Compatible PCB
Layout
♦
Socketed 16-Pin Thin QFN-EP (3mm x 3mm)
♦
Evaluates MAX5487/MAX5488/MAX5489
Evaluates: MAX5487/MAX5488/MAX5489
Ordering Information
PART
TYPE
PC INTERFACE
USB
MAX5488EVKIT#
EV kit
#Denotes
an RoHS-compliant EV kit.
Component List
DESIGNATION
QTY
DESCRIPTION
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104K
Taiyo Yuden EMK107BJ104KA
Murata GRM188R71C104K
Not installed, capacitor (1206)
0.033µF ±10%, 16V (min) X5R
ceramic capacitor (0603)
Taiyo Yuden EMK107BJ333KA
Murata GRM188R71E333K
TDK C1608X7R1E333K
10pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
TDK C1608C0G1H100J
Taiyo Yuden UMK107CG100DZ
22pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
TDK C1608C0G1H220J
Taiyo Yuden UMK107CG220KZ
10µF ±20%, 16V X5R ceramic
capacitors (1206)
Murata GRM31CR61C106M
TDK C3216X5R1C106M
Panasonic ECJ3YB1C106M
KEMET C1206C106M4PAC
D1
H1, H2
J1
J2
J3
JU1
L6
R1, R2
R3
R4, R7
R5
R6
R8, R26
1
2
1
0
0
1
1
2
1
2
1
1
2
DESIGNATION
QTY
DESCRIPTION
1µF ±10%, 16V X5R ceramic
capacitors (0603)
TDK C1608X5R1C105K
Murata GRM188R61C105K
AVX 0603YD105MAT
KEMET C0603C105K4PAC
Red LED (0805)
Lumex Opto SML-LX0805SIC-TR
4-pin headers
USB series B right-angle PC-mount
receptacle
Assmann Electric AU-Y1007-R
Not installed, header
Not installed, 2 x 5-pin JTAG header
3-pin header
70Ω, 4A ferrite bead (0603)
TDK MMZ1608R301A
Murata BLM18SG700 TN1
27Ω ±5% resistors (0603)
1.5kΩ ±5% resistor (0603)
470Ω ±5% resistors (0603)
2.2kΩ ±5% resistor (0603)
10kΩ ±5% resistor (0603)
0Ω resistors (0603)
C1, C5–C9,
C17, C18, C37
9
C39
1
C2
0
C4
1
C15, C16
2
C30, C31
2
C38, C40
2
Windows is a registered trademark of Microsoft Corp.
________________________________________________________________
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.
MAX5488 Evaluation Kit
Evaluates: MAX5487/MAX5488/MAX5489
Component List (continued)
DESIGNATION
R9, R10, R11
R12–R16
QTY
0
0
DESCRIPTION
Not installed, resistors (0603)
Not installed, resistors—short by PC
trace (0402)
MAX5488SOCKET (16-pin thin QFN-
EP, 3mm x 3mm)
Plastronics 16QN50K23030
MAX3390EEUD+ (14-pin TSSOP)
MAXQ2000-RAX+ (68-pin QFN-EP,
10mm x 10mm)
USB UART
FTDI FT232BL (32-pin TQFP,
7mm x 7mm)
93C46 type 3-wire EEPROM
Atmel AT93C46A-10SU-2.7
(8-pin SO)
MAX8511EXK25+ LDO regulator
(5-pin SC70)
—
—
—
4
1
1
Y2
Y3
Y4
1
0
1
DESIGNATION
QTY
DESCRIPTION
20MHz crystal
SunTsu SCD20B-20.000MHZ-I
Citizen HCM49-20.000MABJ-UT
Not installed, 32.768kHz crystal
6MHz crystal
Citizen HCM49-6.000MABJ-UT
SunTsu SCD22B-6.000MHZ-I
Bumps
3M SJ-5003BK
Shunt (JU1)
Maxim sample box containing three
ICs MAX5488ETE#G16
(16-pin thin QFN-EP)
USB high-speed A-to-B cables 5ft
(1.5m)
PCB: MAX5488 Evaluation Kit#
U1
U2
U4
1
1
1
U5
1
U6
1
—
—
1
1
U7
1
Component Suppliers
SUPPLIER
AVX Corp.
KEMET Corp.
Murata Mfg. Co., Ltd.
Panasonic Corp.
Taiyo Yuden
TDK Corp.
PHONE
843-946-0238
864-963-6300
770-436-1300
800-344-2112
800-348-2496
847-803-6100
www.avxcorp.com
www.kemet.com
www.murata.com
www.panasonic.com
www.t-yuden.com
www.component.tdk.com
WEBSITE
Note:
Indicate that you are using the MAX5488 when contacting these component suppliers.
2
_______________________________________________________________________________________
MAX5488 Evaluation Kit
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
•
Maxim MAX5488 EV kit (includes USB type A-B
cable)
•
Sample MAX5488ETE#G16 device (included with
MAX5488 EV kit)
•
User-supplied Windows 98SE/2000/XP-compatible
PC with a spare USB port
•
Administrator privileges may be required when first
installing the device on Windows 2000/XP
•
Two ohmmeters
•
Tweezers to move the MAX5488 sample into its socket
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
98SE/2000/XP operating system.
3) Ensure that the MAX5488 EV kit board’s jumper set-
tings are correct (see Table 1 for jumper settings).
4) Unlatch the socket and use tweezers to install one
of the MAX5488 devices, exposed pad down. Note
the location of pin 1 in the upper-right corner, as
indicated on the PCB silkscreen. On the device, the
pin 1 index is marked with a molded or marked fea-
ture, typically # or + for RoHS-compliant devices.
After ensuring that the device is properly seated,
latch the socket lid securely closed.
5) Connect one of the ohmmeters across the WA and
LA terminals.
6) Connect the other ohmmeter across the WB and LB
terminals.
7) Connect the USB cable from the PC to the
MINIQUSB board. A
Building Driver Database
win-
dow pops up in addition to a
New Hardware Found
message 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
privileges are required to install the USB device dri-
ver on Windows 2000 and XP. Refer to
Application
Note 3601: Troubleshooting Windows Plug-and-Play
and USB for Maxim Evaluation Kits
if you have any
problems during this step.
8) 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\Maxim MAX5488EVKIT
(default
installation directory) using the
Browse
button.
During device driver installation, Windows XP
shows a warning message indicating that the
device driver Maxim uses does not contain a digital
signature. This is not an error condition. It is safe to
proceed with the installation.
9) Start the EV kit software by clicking its icon in the
Windows
Start
menu.
10) The software automatically searches for the
MAX5488. After successful connection, the EV kit
firmware banner appears in the lower-left corner of
the window. Move the
Channel A
or
Channel B
slider and click the
Write
button to set the wiper
position, as shown in Figure 1.
Evaluates: MAX5487/MAX5488/MAX5489
Procedure
The MAX5488 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power until all connec-
tions are completed.
1) Visit www.maxim-ic.com/evkitsoftware to download
the latest version of the EV kit software,
5488Rxx.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
launching the 5488Rxx.MSI program inside the zip
file. The program files are copied and icons are cre-
ated in the Windows
Start | Programs
menu.
Table 1. JU1 Jumper Functions
SIGNAL
SHUNT
POSITION
1-2*
VDD
Open
2-3
EV KIT FUNCTION
Power device V+ from USB 5V
supply
Do not use—device will not be
powered
Power device V+ from user-
provided supply
*Default
position.
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3
MAX5488 Evaluation Kit
Evaluates: MAX5487/MAX5488/MAX5489
Detailed Description of Software
The MAX5488 EV kit software graphical user interface
(GUI) is a Windows program that provides a convenient
means to control the MAX5488 (Figure 1).
In the
Channel B
group box, set the tap value (either by
typing the decimal tap number into one of the edit boxes
or by moving the slider), and then click the
Write
button.
As confirmation, the
Command History
window shows
SPI sequence 0x02 nn, where nn = the hexadecimal
W-L tap value.
Figure 1. MAX5488 EV Kit Main Window
Factory Reset
Clicking the
Factory Reset
button returns wiper A and
wiper B (and the nonvolatile memory) to the factory-
programmed midscale tap position.
Nonvolatile Programming
In the
Channel A
group box, set the tap value (either by
typing the decimal tap number into one of the edit boxes
or by moving the slider), and then click the
Write NV
button. As confirmation, the
Command History
window
shows SPI sequence 0x11 nn, where nn = the hexadeci-
mal W-L tap value.
In the
Channel B
group box, set the tap value (either by
typing the decimal tap number into one of the edit boxes
or by moving the slider), and then click the
Write NV
button. As confirmation, the
Command History
window
shows SPI sequence 0x12 nn, where nn = the hexadeci-
mal W-L tap value.
Wipers A and B Position
In the
Channel A
group box, set the tap value (either by
typing the decimal tap number into one of the edit boxes
or by moving the slider), and then click the
Write
button.
As confirmation, the
Command History
window shows
SPI sequence 0x01 nn, where nn = the hexadecimal
W-L tap value.
4
_______________________________________________________________________________________
MAX5488 Evaluation Kit
Volatile/Nonvolatile Data Transfer
In the
Channel A
group box, copy the active tap value
to nonvolatile memory by clicking the
Save active
➔
NV
button. As confirmation, the
Command History
window shows SPI sequence 0x21.
In the
Channel B
group box, copy the active tap value
to nonvolatile memory by clicking the
Save active
➔
NV
button. As confirmation, the
Command History
window shows SPI sequence 0x22.
To copy both of the active tap values to nonvolatile
memory, click the
Copy Both Wiper Registers to NV
Registers
button. As confirmation, the
Command
History
window shows SPI sequence 0x23.
In the
Channel A
group box, copy the active tap value
to nonvolatile memory by clicking the
Load NV➔active
button. As confirmation, the
Command History
window
shows SPI sequence 0x31.
In the
Channel B
group box, copy the active tap value
to nonvolatile memory by clicking the
Load NV
➔
active
button. As confirmation, the
Command History
window shows SPI sequence 0x32.
To copy both of the active tap values to nonvolatile
memory, click the
Copy Both NV Registers to Wiper
Registers
button. As confirmation, the
Command
History
window shows SPI sequence 0x33.
key to move the keyboard’s focus from one control to
the next. The focused control is indicated by a dotted
outline.
SHIFT+TAB
moves the focus to the previously
focused control. Buttons respond to the keyboard’s
SPACE
bar. 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 press the
letter of the menu item you want. Most menu items have
one letter underlined, indicating their shortcut key.
Evaluates: MAX5487/MAX5488/MAX5489
Detailed Description of Hardware
Evaluating the MAX5487 or MAX5489
The MAX5487 and MAX5489 are similar to the
MAX5488, but with a different end-to-end resistance.
To evaluate the MAX5487 or MAX5489, order a free
sample of the MAX5487ETE#G16 (refer to the
MAX5487/MAX5488/MAX5489 IC data sheet).
External User-Supplied SPI Interface
The EV kit may be modified for use with an external,
user-supplied SPI interface. First, with power off and
USB disconnected, flip the board over and cut the
traces that are on the back of the board, underneath
location J2. Install a standard dual-row header, and
connect a ribbon cable to the user-supplied SPI.
Using an External Power Supply
The EV kit may be used with an external, user-supplied
2.7V to 5.25V power supply. First, with power off and USB
disconnected, move the JU1 shunt between pins 2-3.
Keyboard Navigation
When you type on the keyboard, the system must know
which control should receive the keys. Press the
TAB
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