19-2994; Rev 0; 9/03
MAX1168 Evaluation Kit/Evaluation System
General Description
The MAX1168 evaluation system (EV system) is a com-
plete 8-channel, 16-bit data-acquisition system that is
comprised of a MAX1168 evaluation kit (EV kit) and a
Maxim 68HC16MODULE-DIP microcontroller (µC)
module.
Order the complete EV system (MAX1168EVC16) for a
comprehensive evaluation of the MAX1168 using a per-
sonal computer (PC). Order the EV kit (MAX1168EVKIT)
separately if the 68HC16MODULE-DIP module has
been purchased with a previous Maxim EV system, or
for custom use in other µC-based systems.
o
Proven PC Board Layout
o
Windows
®
95/98/2000/XP-Compatible Evaluation
Software
o
Convenient On-Board Test Points
o
Fully Assembled and Tested
Features
Evaluates: MAX1068/MAX1168
MAX1168EVC16 System
Component List
PART
MAX1168EVKIT
68HC16MODULE-DIP
QTY
1
1
DESCRIPTION
MAX1168 EV Kit
68HC16 µC Module
Ordering Information
PART
MAX1168EVKIT
MAX1168EVC16
IC PACKAGE
24 QSOP
24 QSOP
INTERFACE TYPE
User-supplied
Windows software
Component Suppliers
SUPPLIER
Fairchild
Semiconductor
TDK
PHONE
888-522-5372
847-803-6100
WEBSITE
www.fairchildsemi.com
www.component.tdk.com
Note:
The MAX1168 software is included with the MAX1168 EV
kit but is designed for use with the complete EV system. The EV
system includes a µC module and the EV kit. If the Windows
software is not required, the EV kit board can be purchased by
itself, without the µC module.
Note:
To evaluate the MAX1068, request a free sample of the
MAX1068_CEG when ordering the MAX1168 EV kit.
Note:
Please indicate you are using the MAX1168 when con-
tacting these component suppliers.
MAX1168EVKIT Component List
DESIGNATION
C1–C18, C21,
C22
QTY
20
DESCRIPTION
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104KT
10µF ±20%, 16V X5R ceramic
capacitors (1210)
TDK C3225X5R1C106M
1µF ±20%, 10V X5R ceramic
capacitor (0805)
TDK C2012X5R1A105M
100pF ceramic capacitors (0603)
TDK C1608C0G1H101J
0.22µF ±10%, 10V X7R ceramic
capacitors (0603)
TDK C1608X7R1A224K
Surface-mount ferrite beads (0603)
TDK MMZ1608B601C
100Ω ±5% resistors (0603)
DESIGNATION
R9–R16
R17–R24
U1
C19, C20
2
U2
U3–U10
J1
C24–C31
8
TB0
JU1
JU2
None
None
None
QTY
8
8
1
1
8
1
1
1
1
2
1
1
DESCRIPTION
4.7kΩ ±5% resistors (0603)
10Ω ±5% resistors (0603)
16-bit ADC (24-pin QSOP)
Maxim MAX1168CCEG
Logic buffer (5-SOT23)
Fairchild Semiconductor NC7SZ125
Op amps (SOT23-5)
Maxim MAX4430EUK
2 x 20 right-angle female connector
Samtec SSW-120-02-S-D-RA
2-circuit terminal block
2-pin header
3-pin header
Shunts
PC board, MAX1168 EV kit
MAX1168 EV kit software, CD-ROM
C23
1
C32–C39
8
FB1, FB2
R1–R8
2
8
Windows is a registered trademark of Microsoft Corp.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX1168 Evaluation Kit/Evaluation System
Evaluates: MAX1068/MAX1168
MAX1168EV Kit Files
FILE NAME
INSTALL.EXE
MAX1168.EXE
HELPFILE.HTM
UNINST.INI
KIT1168.C16
FUNCTION
Installs the EV kit files on your computer
Application program
MAX1168 EV kit help file
Uninstalls the EV kit software
Software loaded into the 68HC16 µC
6) Connect the +5V power supply to the VDD pad
(with respect to the GND pad) on the MAX1168 EV
kit board.
7) Connect the -5V power supply to the VEE pad (with
respect to the GND pad) on the MAX1168 EV kit
board.
8) Connect the 9-pin serial cable from the computer’s
serial port to the µC module’s DB9 connector (J3).
9) Install the MAX1168 EV kit software on your com-
puter by running the INSTALL.EXE program on the
CD-ROM. The program files are copied and icons
are created in the
Programs
section within the
Windows
Start
menu.
10) Turn on the +5V power supply. Next, turn on the -5V
power supply. Finally, turn on the +8V to +20V
power supply and turn on the µC module’s slide
switch SW1 to the ON position.
11) Start the MAX1168 EV kit program by clicking on its
icon in the
Programs
section within the Windows
Start
menu.
12) The Windows program will prompt you to click
OK
for
Automatic
serial port selection. When you click
OK,
the Windows program automatically downloads
the file KIT1168.C16 to the module. Please wait
approximately 25 seconds for the download to
complete.
13) Apply an input signal (0 to +4.096V) between AIN0
and GND. Observe the AIN0 label on the running
Windows program.
Quick Start
Recommended Equipment
• MAX1168EVC16 (MAX1168EVKIT board and
68HC16MODULE-DIP)
• Three DC power supplies:
+8V to +20V at 0.25A
+5V at 0.2A
-5V at 0.2A
• Analog signal source:
0 to 4.096V
• Windows 95/98/2000/XP-compatible computer with
an available serial (COM) port
• 9-pin I/O extension cable (straight-through female-
to-male)
Procedure
Do not turn on the power until all connections are
complete:
1) Verify jumper JU1 is ON, disabling DSP mode.
2) Verify jumper JU2 is connected to pins 2–3,
enabling an 8-bit-wide data-transfer mode.
3) Carefully connect the boards by aligning the 40-pin
connector of the MAX1168 EV kit with the 40-pin
header of the 68HC16MODULE-DIP module. Gently
press them together. The two boards should be
flush against one another.
4) Ensure that the µC module’s SW1 switch is in the
OFF position.
5) Connect the +8V to +20V power supply to the µC
module’s terminal block (J2), located next to the
ON/OFF switch (SW1) along the top edge of the µC
module. Observe the polarity marked on the board.
Detailed Description of Software
The evaluation software’s main window shown in Figure
1 displays the voltage and code of the analog-input
signals AIN0–AIN7. The software supports manual read
or automatic read operations. Separate comboboxes
allow quick modifications to the MAX1168’s control
byte. The SPI™ serial clock frequency is adjustable
from 4.19MHz to 33kHz, and the software’s reference
value can be changed to match the applied external
reference. The provided Windows-compatible software
supports SPI mode (not DSP mode) and also only sup-
ports the MAX1168 EV kit when configured in 8-bit-
wide data-transfer mode. Table 1 describes all the con-
trols on the evaluation software’s main window.
SPI is a trademark of Motorola, Inc
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MAX1168 Evaluation Kit/Evaluation System
Evaluates: MAX1068/MAX1168
Table 1. Software Control Descriptions
CONTROL
DESCRIPTION
The
View
menu makes the COM port debug form visible
The
BlockSample
menu is an EV kit software feature that allows a single channel to be sampled and
stored. The data block length is selectable and the data can be saved to a file. Block sampling is limited
to single-channel read modes only. SCAN[1:0] = 01 or 11 modes are not supported. For multiple-channel
reads, use the
Read ADC
button or the
AutoRead
checkbox.
The
Device
menu allows the user to evaluate either the MAX1168 or MAX1068
The
Help
menu allows the user to view the help file or the software’s about box
The
Control Byte
label shows the current control byte setting in hexadecimal
The
CS[2:0]
combobox selects the channel below:
000 CS2 CS1 CS0 = Channel 0
001 CS2 CS1 CS0 = Channel 1
010 CS2 CS1 CS0 = Channel 2
011 CS2 CS1 CS0 = Channel 3
100 CS2 CS1 CS0 = Channel 4
101 CS2 CS1 CS0 = Channel 5
110 CS2 CS1 CS0 = Channel 6
111 CS2 CS1 CS0 = Channel 7
The
SCAN[1:0]
combobox selects the scan mode below:
00 SCAN1 SCAN0 = Single channel, no scan
01 SCAN1 SCAN0 = Sequentially scans channel 0 to CS[2:0]
10 SCAN1 SCAN0 = Sequentially scans channel 4 to CS[2:0]; CS[2:0]
≥
4
11 SCAN1 SCAN0 = Scan channel CS[2:0] eight times
The
SEL[1:0]
combobox selects the reference mode below:
00 SEL1 SEL0 = Internal reference mode
01 SEL1 SEL0 = EV kit software does not support this mode
10 SEL1 SEL0 = EV kit software does not support this mode
11 SEL1 SEL0 = External reference mode
The
CLK
combobox selects the clock mode below:
0 EXT CLK
1 INT CLK
The
SPI SCLK Frequency
combobox selections are:
02: 4.19MHz
04: 2.10MHz
.
.
.
FF: 33kHz
_______________________________________________________________________________________
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MAX1168 Evaluation Kit/Evaluation System
Evaluates: MAX1068/MAX1168
Table 1. Software Control Descriptions (continued)
CONTROL
DESCRIPTION
The
Set Vref
button allows the user to specify the actual reference voltage. The evaluation software
assumes a +4.096V reference voltage, unless otherwise specified. To override the default +4.096V software
reference value, measure the actual reference voltage at the terminal block (TB0) on the MAX1168 EV kit
board and enter the new reference voltage, without the volt unit. Finally, press the
Set Vref
button. The EV kit
software uses the value typed in the Vref field to translate the digital code to a voltage.
Pressing the
Read ADC
button performs the conversion(s) specified by the control byte and reads back
the result(s).
Checking the
AutoRead
checkbox performs the conversion(s) specified by the control byte and reads
back the result(s) every 500ms. A blinking asterisk indicates AutoRead is active.
The
Exit
button closes the program
Detailed Description of Hardware
MAX1168 EV System
The MAX1168 EV system is a complete 8-channel, 16-
bit data-acquisition system consisting of a MAX1168 EV
kit and a Maxim 68HC16MODULE-DIP µC module. The
MAX1168 EV system is used to evaluate the MAX1168
8-channel, 16-bit serial ADC. See the
Quick Start
sec-
tion for setup and operating instructions. See Table 1 for
more information on the provided Windows software.
Table 2. DSP Frame Sync Receive Input
(DSPR)
JUMPER
SHUNT
POSITION
ON*
JU1
OFF
DESCRIPTION
DSP mode disable
DSP mode enable (the supplied
Windows software does not
support this mode)
MAX1168 EV Kit
The MAX1168 EV kit board provides a proven layout for
evaluating the MAX1168 8-channel, 16-bit ADC and can
be obtained separately without the µC module for use
with an existing µC. The MAX1168 EV kit contains two
different types of buffers. U2 is a logic buffer to limit the
load capacitance that is seen by the DOUT line of the
MAX1168. U3–U10 are 16-bit accurate analog buffers
connected in the unity-gain configuration. U1 is powered
from V
DD
and U3–U10 are powered from V
DD
and V
EE
.
U3 is powered from the µC module (J1-7, J1-8). A termi-
nal block (TB0) has also been provided on the MAX1168
EV kit board for evaluating external reference mode.
Refer to the MAX1167/MAX1168 or MAX1067/ MAX1068
data sheets to ensure all interface timing specifications
are met.
The MAX1168 and MAX1168 EV kit board support DSP
and 16-bit-wide data-transfer mode. Jumpers JU1 and
JU2 can be configured for these modes; however, the
supplied EV kit Windows-compatible software does not
support these two modes. Please refer to the
MAX1167/MAX1168 or MAX1067/MAX1068 data sheets
for more information.
*Default
configuration.
Table 3. Data Bit Transfer Select Input
(DSEL)
JUMPER
SHUNT
POSITION
1–2
2–3*
DESCRIPTION
16-bit-wide data-transfer mode
(the supplied Windows software
does not support this mode)
8-bit-wide data-transfer mode
JU2
*Default
configuration.
Caution: Do not connect an external controller to
the DSEL pad while a shunt is on jumper JU2.
4
_______________________________________________________________________________________
MAX1168 Evaluation Kit/Evaluation System
Evaluates: MAX1068/MAX1168
Figure 1. MAX1168 Evaluation Software’s Main Window
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