General Description
The MAX1117 evaluation system (EV system) is a com-
plete two-channel data-acquisition system consisting of
a MAX1117 evaluation kit (EV kit) and a Maxim
68L11DMODULE microcontroller (C) module. The
MAX1117 is a high-speed, 8-bit data-acquisition sys-
tem. Windows 95/98
software provides a handy user
interface to exercise the MAX1117's features.
Order the complete EV System (MAX1117EVL11) for
comprehensive evaluation of the MAX1117 using a per-
sonal computer. Order the EV kit (MAX1117EVKIT) if
the 68L11DMODULE module has already been pur-
chased with a previous Maxim EV system, or for custom
use in other C-based systems.
Features
o Proven PC Board Layout
o Convenient On-Board Test Points
o Data-Logging Software
o Fully Assembled and Tested
Evaluates: MAX1115MAX1119
MAX1117 Evaluation System
________________________________________________________________ Maxim Integrated Products
1
19-1891; Rev 0; 1/01
Component List
MAX1117EVL11 System
Ordering Information
PART NUMBER
TEMP. RANGE
INTERFACE
TYPE
MAX1117EVKIT
0C to +70C
User-Supplied
MAX1117EVL11
0C to +70C
Windows Software
PART
QTY
DESCRIPTION
MAX1117EVKIT
1
MAX1117 EV Kit
68L11DMODULE
1
68HC11
C Module
REFERENCE
QTY
DESCRIPTION
C1
1
0.1F ceramic capacitor
C2, C3
2
100pF ceramic capacitors
C4
0
Open
J1
1
2
20 right angle socket
JU1, JU2
2
2-pin headers
TP1
1
5-pin header
U1
1
Maxim MAX1117EKA
U2
1
Maxim MAX6025BEUR-T
None
1
PC Board, MAX1117 EV Kit
None
1
3 1/2in software disk,
MAX1117 EV kit
None
1
MAX1117 EV kit data sheet
None
1
MAX1117 data sheet
Note: The MAX1117 software is designed for use with the com-
plete EV system MAX1117EVL11 (includes 68L11DMODULE
module together with MAX1117EVKIT). If the MAX1117 evalua-
tion software will not be used, the MAX1117EVKIT board can be
purchased separately without the microcontroller.
Windows 95/98 is a registered trademark of Microsoft Corp.
MAX1117EVKIT
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
Quick Start
Before you begin, you will need the following equipment:
o Maxim MAX1117EVL11 (contains MAX1117EVKIT
board and 68L11DMODULE)
o A small DC power supply, such as a 12V DC 0.25A
plug-in transformer, or a 9V battery
o An IBM PC-compatible computer running Windows
95/98
o A spare serial communications port, preferably a
9-pin plug
o A serial cable to connect the computer's serial port
to the 68L11DMODULE
1) Carefully connect the boards by aligning the 40-pin
header of the MAX1117 EV kit with the 40-pin con-
nector of the 68L11DMODULE module. Gently
press them together. The two boards should be
flush against one another.
2) Ensure that JU1 and JU2 are open and place the
C module's SW1 in the OFF position.
3) Connect a +7V to +16V DC power source to the C
module at the terminal block, located next to the
on/off switch along the top edge of the C module.
Observe the polarity marked on the board.
4) Connect a cable from the computer's serial port to
the C module. If using a 9-pin serial port, use a
Quick Start is continued on page 2.
Evaluates: MAX1115MAX1119
MAX1117 Evaluation System
2
_______________________________________________________________________________________
straight-through, 9-pin female-to-male cable. If the
only available serial port uses a 25-pin connector, a
standard 25-pin to 9-pin adapter will be required.
The EV kit software checks the modem status lines
(CTS, DSR, DCD) to confirm that the correct port has
been selected.
5) Install the MAX1117 EV kit software on your computer
by running the INSTALL.EXE program on the floppy
disk. The program files are copied and icons are cre-
ated for them in the Windows Start Menu.
6) Start the MAX1117 program by opening its icon in
the Start Menu.
7) The program will prompt you to connect the C module
and turn its power on. Slide SW1 to the ON position.
Select the correct serial port, and click OK. The program
will automatically download KIT1117.L11 to the module.
8) Apply an input signal between CH0 and GND.
Observe the readout on the screen.
Detailed Description
MAX1117 Stand-Alone EV Kit
The MAX1117 EV kit provides a proven PC board layout
to evaluate the MAX1117. It must be interfaced to appro-
priate timing signals for proper operation. Connect +3.3V
to VDD, and connect ground return to GND. Refer to
Figure 1, MAX1117 EV Kit Schematic. Refer to the
MAX1117 data sheet for timing requirements.
MAX1117 EV System
The MAX1117EVL11 EV system operates from a user-
supplied +7V to +16V DC power supply. Windows
95/98 software running on an IBM PC interfaces to the
EV system board through the computer's serial commu-
nications port. Refer to the Quick Start section for setup
and operating instructions.
Description of Software
The evaluation software's main window (Figure 2) con-
trols the serial clock speed and sample rate. It displays
the voltage and output code, as well as some statistics
of the input signal. A separate graph window shows the
data changing in real time. The display update rate is
limited to about 10 samples per second, due to COM
port bandwidth limitations.
Statistics
The Minimum and Maximum fields show the highest
and lowest readings acquired. The Average field shows
OUT
2
1
3
GND
IN
JU2
JU1
C4
OPEN
VDD
J1-31
J1-35
J1-37
VDD
5
4
3
2
1
TP1
C1
0.1
F
1
2
3
4
C2
100pF
C3
100pF
CH0
CH1
GND
VDD
VDD
CH0
CH1
GND
SCLK
DOUT
CNVST
NC/REF
5
6
7
8
MAX1117
U1
MAX6025
U2
J1-1
J1-2
J1-3
J1-4
J1-7
J1-8
VDD
VDD
Figure 1. MAX1117 EV Kit Schematic
INSTALL.EXE
Installs the EV Kit files on your computer
MAX1117.EXE
Application program
KIT1117.L11
Software loaded into 68HC11
microcontroller
MAX1117 EV Kit Files
Quick Start (continued)
a running mean. The Clear button resets the statistics.
To remove offset errors, first apply zero volts to the active
input channel, clear statistics, acquire some samples,
and then check Tare. This average offset voltage will
now be subtracted from all subsequent measurements.
Sampling
Choose the desired sampling size (Sample! menu item),
click Begin Sampling! (in Sample! pop-up window).
Sample size is restricted to a power of two to permit FFT
processing once the data is saved to a file. After the
samples have been collected, the data is automatically
uploaded to the host and is graphed. Once displayed,
the data can optionally be saved to a file.
Scanning Both Channels
To scan through both channels, select SCAN from the
INPUT menu.
Reference Voltage
The evaluation software assumes a 2.048V reference
voltage, unless otherwise specified. (See the MAX1117
data sheet for more information). To override this value,
type the new reference voltage into the V
REF
edit box
and click the "Set V
REF
" button.
Detailed Description
of Hardware
The MAX1117, is a high-speed, multichannel, 8-bit data-
acquisition system. C2 and C3 are optional noise-filtering
capacitors. When plugged into the 68HC11MODULE,
the VDD circuit is powered by +3V. Refer to Figure 1,
MAX1117 EV Kit Schematic and the MAX1117 data
sheet.
The MAX6025 voltage reference is provided to support
the MAX1118, and is not required for the MAX1115/
MAX1116/MAX1117 and MAX1119.
Evaluating Other MAX1115 family devices
All of the devices in the MAX1115MAX1119 family are
software-compatible. The MAX1115 requires an exter-
nal reference. Close either jumper JU1 or JU2 to pro-
vide an external reference. The MAX1115/MAX1116
have an internal connection on CH1 to monitor supply
voltage. The MAX1116/MAX1119 are specified for
+4.5V to +5.5V operation. You will need to type the
number "4.096" into the V
REF
edit box, and click the
"Set V
REF
" button. Adjust the 68L11DMODULE's VDD
trimpot until VDD is at its maximum. The 68L11DMOD-
ULE's VDD must not exceed 5.0V.
Table 1. Jumper Functions
Troubleshooting
Problem: No output measurement. System reports
zero voltage or fails to make a measurement.
Check VDD supply voltage. Check the reference volt-
age using a digital voltmeter. Use an oscilloscope to
verify that the conversion start signal is being strobed.
Problem: Measurements are erratic, unstable; poor
accuracy.
Check the reference voltage using a digital voltmeter.
Use an oscilloscope to check for noise. When probing
for noise, keep the oscilloscope ground return lead as
short as possible, preferably less than 1/2 inch (10mm).
Evaluates: MAX1115MAX1119
MAX1117 Evaluation System
_______________________________________________________________________________________
3
Figure 2. MAX1117 Evaluation Software's Main Window
JUMPER
POSITION
FUNCTION
JU1
* open
Use internal reference
JU1
closed
Connect REF to VDD
JU2
* open
Use internal reference
JU2
closed
Connect REF to external
reference U2
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.
4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
Evaluates: MAX1115MAX1119
MAX1117 Evaluation System
Figure 3. MAX1117 EV Kit Component Placement Guide--
Component Side
Figure 4. MAX1117 EV Kit PC Board Layout--Component Side
Figure 5. MAX1117 EV Kit PC Board Layout--Solder Side
1.0"
1.0"
1.0"
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