Maxim MAX5488EVKIT Evaluation kit Datasheet

19-0952; Rev 0; 8/07
MAX5488 Evaluation Kit
The MAX5488 evaluation kit (EV kit) is an assembled
and tested printed-circuit board (PCB) that demonstrates the functionality of the MAX5488 dual, 256-tap,
nonvolatile, SPI-interface, linear-taper digital potentiometer. 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
Ordering Information
PART
TYPE
PC INTERFACE
MAX5488EVKIT#
EV kit
#Denotes an RoHS-compliant EV kit.
USB
Component List
DESIGNATION
QTY
DESCRIPTION
C1, C5–C9,
C17, C18, C37
9
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104K
Taiyo Yuden EMK107BJ104KA
Murata GRM188R71C104K
C2
0
Not installed, capacitor (1206)
1
0.033µF ±10%, 16V (min) X5R
ceramic capacitor (0603)
Taiyo Yuden EMK107BJ333KA
Murata GRM188R71E333K
TDK C1608X7R1E333K
C4
C15, C16
C30, C31
C38, C40
2
2
2
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
DESIGNATION
QTY
DESCRIPTION
C39
1
1µF ±10%, 16V X5R ceramic
capacitors (0603)
TDK C1608X5R1C105K
Murata GRM188R61C105K
AVX 0603YD105MAT
KEMET C0603C105K4PAC
D1
1
Red LED (0805)
Lumex Opto SML-LX0805SIC-TR
H1, H2
2
4-pin headers
J1
1
USB series B right-angle PC-mount
receptacle
Assmann Electric AU-Y1007-R
J2
0
Not installed, header
J3
0
Not installed, 2 x 5-pin JTAG header
JU1
1
3-pin header
1
70Ω, 4A ferrite bead (0603)
TDK MMZ1608R301A
Murata BLM18SG700 TN1
L6
R1, R2
2
27Ω ±5% resistors (0603)
R3
1
1.5kΩ ±5% resistor (0603)
R4, R7
2
470Ω ±5% resistors (0603)
R5
1
2.2kΩ ±5% resistor (0603)
R6
1
10kΩ ±5% resistor (0603)
R8, R26
2
0Ω resistors (0603)
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.
Evaluates: MAX5487/MAX5488/MAX5489
General Description
Evaluates: MAX5487/MAX5488/MAX5489
MAX5488 Evaluation Kit
Component List (continued)
DESIGNATION
QTY
R9, R10, R11
0
Not installed, resistors (0603)
1
0
Not installed, resistors—short by PC
trace (0402)
Y2
R12–R16
20MHz crystal
SunTsu SCD20B-20.000MHZ-I
Citizen HCM49-20.000MABJ-UT
Y3
0
Not installed, 32.768kHz crystal
1
MAX5488SOCKET (16-pin thin QFNEP, 3mm x 3mm)
Plastronics 16QN50K23030
Y4
1
6MHz crystal
Citizen HCM49-6.000MABJ-UT
SunTsu SCD22B-6.000MHZ-I
—
4
Bumps
3M SJ-5003BK
—
1
Shunt (JU1)
—
1
Maxim sample box containing three
ICs MAX5488ETE#G16
(16-pin thin QFN-EP)
—
1
USB high-speed A-to-B cables 5ft
(1.5m)
—
1
PCB: MAX5488 Evaluation Kit#
U1
DESCRIPTION
DESIGNATION
U2
1
MAX3390EEUD+ (14-pin TSSOP)
U4
1
MAXQ2000-RAX+ (68-pin QFN-EP,
10mm x 10mm)
1
USB UART
FTDI FT232BL (32-pin TQFP,
7mm x 7mm)
U5
U6
1
93C46 type 3-wire EEPROM
Atmel AT93C46A-10SU-2.7
(8-pin SO)
U7
1
MAX8511EXK25+ LDO regulator
(5-pin SC70)
QTY
DESCRIPTION
Component Suppliers
SUPPLIER
AVX Corp.
PHONE
843-946-0238
WEBSITE
www.avxcorp.com
KEMET Corp.
864-963-6300
www.kemet.com
Murata Mfg. Co., Ltd.
770-436-1300
www.murata.com
Panasonic Corp.
800-344-2112
www.panasonic.com
Taiyo Yuden
800-348-2496
www.t-yuden.com
TDK Corp.
847-803-6100
www.component.tdk.com
Note: Indicate that you are using the MAX5488 when contacting these component suppliers.
2
_______________________________________________________________________________________
MAX5488 Evaluation Kit
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.
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 connections 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 temporary 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 created in the Windows Start | Programs menu.
Table 1. JU1 Jumper Functions
SIGNAL
SHUNT
POSITION
VDD
EV KIT FUNCTION
1-2*
Power device V+ from USB 5V
supply
Open
Do not use—device will not be
powered
2-3
Power device V+ from userprovided supply
3) Ensure that the MAX5488 EV kit board’s jumper settings 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 feature, 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 window 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 driver 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.
*Default position.
_______________________________________________________________________________________
3
Evaluates: MAX5487/MAX5488/MAX5489
Quick Start
Evaluates: MAX5487/MAX5488/MAX5489
MAX5488 Evaluation Kit
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 factoryprogrammed midscale tap position.
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
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 hexadecimal 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 hexadecimal W-L tap value.
_______________________________________________________________________________________
MAX5488 Evaluation Kit
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.
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
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.
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.
Keyboard Navigation
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.
When you type on the keyboard, the system must know
which control should receive the keys. Press the TAB
Using an External Power Supply
_______________________________________________________________________________________
5
Evaluates: MAX5487/MAX5488/MAX5489
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.
LB
HB
H1
1 x 4 HEADER
WB
Evaluates: MAX5487/MAX5488/MAX5489
MAX5488 Evaluation Kit
HA
H1-1
WA
HA
LA
WA
H1-2
12
H1-3
LA
H1-4
WA
13
HB
11
10
WB
15
HA
H2
1 x 4 HEADER
I.C.
U1
WA
1
HB
GND
MAX5488SOCKET
(16QN50K23030)
HA
N.C.
I.C.
VDD
H2-1
WB
16
USB +5V
HB
N.C.
LA
LA
14
9
LB
N.C.
VDD
1
JU1
SCLK
2
DIN
3
8
VDD
7
R7
470Ω
6
D1
5
CS
4
DGND
2
H2-2
3
VDD
LB
C1
0.1μF
GND
H2-4
VDDIO
R8
0Ω
DUT_SCLK
H2-3
C2
OPEN
DUT_CS
WB
DUT_MOSI
LB
R9
OPEN
R10
OPEN
VDD
J2
1
MAXQ_MISO
MAXQ_SCLK
MAXQ_MOSI
MAXQ_CS
2
3
4
5
6
7
VL
VCC
OVL1
IVL2
IVL3
IVL4
N.C.
GND
IVCC1
U2
OVCC2
MAX3390 OVCC3
OVCC4
N.C.
THREE-STATE
14
13
12
11
10
9
VDDIO
J2-1
J2-2
J2-3
J2-4
J2-5
J2-6
J2-7
J2-8
J2-9
J2-10
J2-11
J2-12
R11
OPEN
DUT_SCLK
DUT_MOSI
DUT_CS
6
Figure 2a. MAX5488 EV Kit Schematic (Sheet 1 of 3)
6
_______________________________________________________________________________________
MAX5488 Evaluation Kit
VDDIO
USB +5V
L6
70Ω
USB
+2.5V
1
J1-1
C37
0.1μF
C38
10μF
DGND
DGND
C39
1μF
IN
U7
OUT
MAX8511
3
SHDN
GND
R26
0Ω
5
2
C40
10μF
VDDIO
6
R1
27Ω
DGND
8
J1-2
C6
0.1μF
DGND
DGND
C4
0.033μF
DGND
R4
470Ω
C5
0.1μF
30
3
AVCC
VCC
C7
0.1μF
C8
0.1μF
DGND
26
DGND
13
VCC
3V3OUT
VCCIO
TXD
RXD
USBDM
RTS
R2
27Ω
7
J1-3
CTS
USBDP
DTR
USB +5V
R3
1.5kΩ
C30
22pF
J1-4
DGND
DSR
5
RSTOUT
4
RESET
27
XTIN
USB +5V
8
6
VCC
CS
1
DGND
RI
Y4
6MHz
TXDEN
28
DGND
DCD
U5
FT232BL
C31
22pF
32
2
U6
SK
AT93C46A
3
N.C.
D1
5
4
GND
D0
1
ORG
XTOUT
TXLED
RXLED
EECS
EESK
PWRCTL
25
TXD
24
RXD
23
RTS
22
CTS
21
DTR
20
DSR
19
DCD
18
RI
16
12
11
14
7
C9
0.1μF
DGND
DGND
R5
2.2kΩ
R6
10kΩ
2
USB +5V
31
DGND
PWREN
EEDATA
SLEEP
TEST
AGND
29
GND
9
GND
17
DGND
DGND
DGND
15
10
Figure 2b. MAX5488 EV Kit Schematic (Sheet 2 of 3)
_______________________________________________________________________________________
7
Evaluates: MAX5487/MAX5488/MAX5489
USB +5V
Y3
32.768kHz
RTS
DTR
MAXQ_CS
DGND
MAXQ_MOSI
C16
10pF
Y2
20MHz
CTS
C15
10pF
C17
0.1μF
MAXQ_MISO
VDDIO
MAXQ_SCLK
Evaluates: MAX5487/MAX5488/MAX5489
MAX5488 Evaluation Kit
2
32KOUT
32KIN
P5.2/RX1/INT10
P5.3/TX1/INT11
P5.4/SS
P5.5/MOSI
P5.6/SCLK
P5.7/MISO
P6.1/T1/INT13
P6.0/T1B/INT12
P6.3/T2/OW_IN
P6.2/T2B/OW_OUT
P6.4/T0B/WKOUT0
P6.5/T0/WKOUT1
SEG32
SEG7/P0.7/INT3
SEG31/P3.7/INT7
SEG8/P1.0
SEG30/P3.6/INT6
SEG9/P1.1
SEG29/P3.5/INT5
SEG10/P1.2
SEG28/P3.4/INT4
49 1
2
3
4
5
6
7
8
9
+2.5V
GND
SEG6/P0.6/INT2
GND
SEG33/COM3
SEG27/P3.3
SEG5/P0.5/INT1
VDD
68
SEG34/COM2
SEG26/P3.2
67
SEG4/P0.4/INT0
SEG25/P3.1
66
SEG35/COM1
SEG24/P3.0
65
COMO
MAXQ2000-RAX
SEG3/P0.3
SEG23/P2.7
64
SEG2/P0.2
SEG22/P2.6
63
33
32
TDO
31
TMS
30
TDI
29
TCK
U4
SEG1/P0.1
SEG21/P2.5
62
MAXQ_RESET
J3-6
J3-4
J3-3
J3-7
J3-5
J3-8
J3-9
J3-2
J3-1
J3-10
R12
SHORT
(PC TRACE)
26
25
24
VDDIO
R13
SHORT
(PC TRACE)
23
22
21
RI
TDO
R14
SHORT
(PC TRACE)
20
19
18
DGND
DTR
MAXQ_RESET
RTS
TMS
R15
SHORT
(PC TRACE)
DCD
TDI
10 11 12 13 14 15 16 17 28 42
R16
SHORT
(PC TRACE)
C18
0.1μF
DGND
TCK
DGND
Figure 2c. MAX5488 EV Kit Schematic (Sheet 3 of 3)
8
J3
JTAG
SEG0/P0.0
SEG20/P2.4
61
P4.0/TCK/INT8
VADJ
SEG19/P2.3
60
P4.1/TDI/INT9
VLCD2
SEG18/P2.2
59
P4.2/TMS
VLCD1
SEG17/P2.1
58
RESET
P4.3/TDO
SEG16/P2.0
57
35
VLCD
SEG15/P1.7
56
P7.1/RXO/INT15
SEG14/P1.6
55
P7.0/TXO/INT14
SEG13/P1.5
54
HFXOUT
VDDIO
53
SEG12/P1.4
TXD
52
48 47 46 45 44 43 41 40 39 38 37 36 34
SEG11/P1.3
RXD
50
51
HFXIN
27
DGND
1
_______________________________________________________________________________________
DSR
MAX5488 Evaluation Kit
Evaluates: MAX5487/MAX5488/MAX5489
Figure 3. MAX5488 EV Kit Component Placement Guide—Component Side
_______________________________________________________________________________________
9
Evaluates: MAX5487/MAX5488/MAX5489
MAX5488 Evaluation Kit
Figure 4. MAX5488 EV Kit PCB Layout—Component Side
10
______________________________________________________________________________________
MAX5488 Evaluation Kit
Evaluates: MAX5487/MAX5488/MAX5489
Figure 5. MAX5488 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 ____________________ 11
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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