19-2161; Rev 1; 12/06
MAX1132 Evaluation Kit/Evaluation System
General Description
The MAX1132 evaluation system (EV system) is a com-
plete, single-channel data-acquisition system, consisting
of the MAX1132 evaluation kit (EV kit), Maxim
68HC16MODULE-DIP microcontroller (µC) module, and
USBTO232. The MAX1132 is a high-speed, single-chan-
nel, 16-bit data acquisition system. Windows
®
98/2000/XP-compatible software provides a handy user
interface to exercise the MAX1132’s features. Order the
complete EV System (MAX1132EVC16) for comprehen-
sive evaluation of the MAX1132 using a PC. Order the EV
kit (MAX1132EVKIT) if the 68HC16MODULE-DIP module
has already been purchased with a previous Maxim EV
system, or for custom use in other µC-based systems.
o
Proven PCB Layout
o
Complete Evaluation System
o
Convenient Test Points Provided On-Board
o
Data-Logging Software
o
Fully Assembled and Tested
o
EV Kit Software Supports Windows® 98/2000/XP
with RS-232/COM Port
o
EV Kit Software Supports Windows 2000/XP with
USB Port
Features
Evaluate: MAX1132/MAX1133
Ordering Information
PART
MAX1132EVKIT
MAX1132EVC16
TEMP RANGE
0°C to +70°C
0°C to +70°C
INTERFACE
User supplied
Windows software
MAX1132EVKIT Parts List
REFERENCE QTY
C1, C2
C3
C4
C5, C6, C8
C7
FB1, FB2
J1
JU1, JU5
JU2, JU3, JU4
R1
TB1, TB2
TP1
U1
U2
—
—
—
—
2
1
1
3
1
2
1
2
2
1
2
1
1
1
1
1
1
1
DESCRIPTION
10µF 10V B-size tantalum capacitors
2.2µF 10V X7R ceramic capacitor
0.22µF X7R ceramic capacitor (1206)
0.1µF X7R ceramic capacitors (1206)
1µF X7R ceramic capacitor (1206)
Ferrite beads
2 x 20 right-angle socket
SamTec SSW-120-02-S-D-RA
3-pin headers
2-pin headers
100kΩ ±1% 1206 resistor
0.200in screw terminal blocks
9-pin header
MAX1132BCAP
74HC04 (14-pin SO) hex inverter
PCB: MAX1132EVKIT
3.5in software disk, MAX1132 EV kit
MAX1132 EV kit data sheet
(includes 68HC16MODULE-DIP
manual)
MAX1132 data sheet
Note:
The MAX1132 EV kit software is included with the
MAX1132 EV kit, but is designed for use with the complete EV
system. The EV system includes the Maxim 68HC16MODULE-
DIP µC module, a USBTO232+ USB-to-COM port adapter
board, and the EV kit. If the Windows software will not be used,
the MAX1132 EV kit board can be purchased by itself, without
the µC and adapter board.
MAX1132EVC16 System
Component List
PART
MAX1132EVKIT
68HC16MODULE-DIP
USBTO232+
QTY
1
1
1
DESCRIPTION
MAX1132 EV kit
68HC16 µC module
USB-to-COM port adapter
board
List of Files in MAX1132
EV Kit
FILE
INSTALL.EXE
MAX1132.EXE
KIT1132.C16
DESCRIPTION
Installs the EV kit files on computer
Application program
Software loaded into 68HC16 µC
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.
MAX1132 Evaluation Kit/Evaluation System
Evaluate: MAX1132/MAX1133
MAX1132 Stand-Alone EV Kit
The MAX1132EVKIT provides a proven PCB layout to
facilitate evaluation of the MAX1132. It must be inter-
faced to appropriate timing signals for proper opera-
tion. Connect +5V to AV
DD
and connect ground return
to AGND (Figure 1). Refer to the MAX1132 data sheet
for timing requirements.
6) The MAX1132 EV kit software should have already
been downloaded and installed in the USBTO232
Quick Start.
7) Start the MAX1132 program by opening its icon in
the
Start | Programs
menu.
8) Turn on the power supply and slide SW1 to the ON
position on the 68HC16MODULE-DIP module.
Press the
OK
button to automatically connect and
download the KIT1132.C16 file to the module.
9) Apply the input signal across the pins of JU2.
Observe the readout on the screen.
MAX1132 EV System
The MAX1132EVC16 EV system operates from a user-
supplied +7VDC to +20VDC power supply. Windows
98/2000/XP-compatible software running PC interfaces
to the EV system board through the computer’s serial
communications port (virtual COM port). See the
Quick
Start
section for setup and operating instructions.
Recommended Equipment—RS-232/COM
Port PC Connection Option
Before you begin, the following equipment is needed:
• MAX1132EVC16 (contains MAX1132EVKIT board
and 68HC16MODULE-DIP)
•
•
Small DC power supply, such as a 12VDC, 0.25A
plug-in transformer, or a +9V battery
PC-compatible computer running Windows
98/2000/XP with an available serial communications
port, preferably a 9-pin plug
Serial cable to connect the computer’s serial port to
the 68HC16MODULE-DIP
Quick Start
Recommended Equipment—USB Port PC
Connection Option
Before you begin, the following equipment is needed:
• MAX1132EVC16 (contains MAX1132 EV kit board,
68HC16MODULE-DIP, and USBTO232)
•
•
Small DC power supply, such as a 12VDC, 0.25A
plug-in transformer, or a +9V battery
PC-compatible computer running Windows 2000/XP
with an available USB port to connect to the
USBTO232 board
USB cable included with the USBTO232
•
Procedure
Caution: Do not turn on the power until all the con-
nections are completed.
1) Visit the Maxim website (www.maxim-ic.com/evkit-
software) to download the latest version of the EV kit
software. Save the EV kit software to a temporary
folder and uncompress the file (if it is a .zip file).
2) Install the MAX1132 EV kit software on your com-
puter by running the INSTALL.EXE program. The
program files are copied and icons are created for
them in the Windows
Start | Programs
menu.
3) Carefully connect the boards by aligning the 40-pin
connector of the MAX1132 EV kit with the 40-pin
connector of the 68HC16MODULE-DIP module.
Gently press them together. The two boards should
be flush against one another.
4) Check the jumper settings (Table 1).
5) Connect a +7VDC to +20VDC power source to the
68HC16MODULE-DIP module at the terminal block
J2 located next to the ON/OFF switch. Observe the
polarity marked on the board.
6) Connect a cable from the computer’s serial port to
the 68HC16MODULE-DIP module. If using a 9-pin
serial port, use a straight-through, 9-pin female-to-
•
Procedure
Caution: Do not turn on the power until all the con-
nections are completed.
1) Visit the Maxim website (www.maxim-ic.com) to
download the latest version of the USBTO232 User
Guide. Follow the steps in the USBTO232 User
Guide
Quick Start
section and return to step 2 of
this
Quick Start
section when finished.
2) Carefully connect the boards by aligning the 40-pin
connector of the MAX1132 EV kit with the 40-pin
connector of the 68HC16MODULE-DIP module.
Gently press them together. The two boards should
be flush against one another.
3) Check the jumper settings (Table 1).
4) Connect a +7VDC to +20VDC power source to the
µC module at the terminal block located next to the
ON/OFF switch, along the top edge of the µC mod-
ule. Observe the polarity marked on the board.
5) Connect the USBTO232 board to the 68HC16MOD-
ULE-DIP module if you have not done so already.
2
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MAX1132 Evaluation Kit/Evaluation System
male cable. If the only available serial port uses a
25-pin connector, a standard 25-pin to 9-pin
adapter is required. The EV kit software checks the
modem status lines (CTS, DSR, DCD) to confirm
that the correct port has been selected.
7) Start the MAX1132 program by opening its icon in
the
Start | Programs
menu.
8) Turn on the power supply and slide SW1 to the ON
position on the 68HC16MODULE-DIP module.
Press the
OK
button to automatically connect and
download the KIT1132.C16 file to the module.
9) Apply the input signal across the pins of JU2.
Observe the readout on the screen.
Evaluate: MAX1132/MAX1133
Controls
The control word is divided into several fields. To
change the active control word, drop down the appro-
priate field’s combo box and select the desired option.
If the QSPI clock is set to STOP, the configuration data
is not sent until the READ button is clicked.
Statistics
The minimum and maximum fields show the lowest and
highest readings acquired. The average and RMS
fields show the running mean and root-mean-square of
the input signal. 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 offset is now sub-
tracted from all subsequent voltage measurements.
Detailed Description
of Software
The evaluation software main window controls the
active control word bits, serial clock speed, and sam-
ple 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 update rate is limited to about 10 samples per sec-
ond, due to COM port bandwidth limitations.
Sampling
To sample data at rates up to 125ksps, select the
Sample menu item, make your selections, and click the
Begin Sampling button. 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
Table 1. Jumper Functions
JUMPER
—
JU1
—
JU2
—
JU3
—
JU4
—
—
JU5
—
POSITION
1-2
Open
2-3
Closed
Open
Closed
Open*
Closed
Open*
1
2
3
Operate
SHDN
is controlled by 68HC16 module
Shutdown
Measure short circuit (zero volts)
Apply input signal at JU2
Illegal
Enable internal reference, or apply an external reference
Disable internal reference
Enable internal reference
User-programmable output pin P2
User-programmable output pin P1
User-programmable output pin P0
FUNCTION
*Default
configuration.
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3
MAX1132 Evaluation Kit/Evaluation System
Evaluate: MAX1132/MAX1133
graphed. Once displayed, the data can optionally be
saved to a file.
ues into the appropriate edit box and click the Set V
REF
button.
Saving Graphs to Disk
Data in the real-time graph and in sampled data graphs
may be saved to a file. Only the raw output codes are
saved, but voltages may be inferred based on the ref-
erence voltage and the maximum code value.
Detailed Description
of Hardware
The MAX1132 (U1) is a high-speed, single-channel, 16-
bit data-acquisition system. There is no antialiasing filter
provided. The input signal may be applied directly to
JU2. High-impedance signal sources may require an
input buffer, which may be installed in the prototype
area. C4 bypasses the bandgap reference, and C3
bypasses the A/D converter‘s voltage reference. When
plugged into the 68HC16MODULE, the AV
DD
and DV
DD
circuits are both powered by +5V. (Figure 1). Refer to the
MAX1132 data sheet.
Evaluating Shutdown
The evaluation software configures the 68HC16’s QSPI
submodule to continuously read data from the MAX1132
into the 68HC16. The sample rate is controlled by the
QSPI clock. To evaluate power-saving modes, these
automatic updates must be stopped. First, set the QSPI
clock control to STOP. This reconfigures the 68HC16’s
QSPI submodule to stop driving the serial clock. Second,
in the evaluation software’s main window, uncheck the
Read Every checkbox. Next, choose the desired software
power-down control word, and click the Read button to
send the new configuration to the MAX1132. If evaluating
the hardware shutdown, move JU2 to the 2-3 position.
Evaluating the MAX1133
To change the evaluation software's full-scale voltage
for use with the MAX1133, type 4.096 into the full-scale
edit box and click the Set V
REF
button.
Reference Voltage
The evaluation software assumes a +4.096V reference
voltage and a +12V full-scale voltage, unless otherwise
specified. Refer to the MAX1132 data sheet for more
information. To override these values, type the new val-
Troubleshooting
Problem: No output measurement. System seems to
report zero voltage, or fails to make a measurement.
Check V
DD
and V
LOGIC
supply voltages. Check the
+4.096V reference voltage using a digital voltmeter.
4
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MAX1132 Evaluation Kit/Evaluation System
Evaluate: MAX1132/MAX1133
U2-C
5
74HC04
U2-D
JU3
C2
10µF
10V
AVDD
TP1-1
C1
10µF
10V
J1-1
J1-2
J1-3
J1-4
TP1-2
DVDD
TB2
JU5
1
2
3
TP1-3
10
7
8
9
P2
P1
P0
RST
SSTRB
DOUT
11
1
12
R1 TP1-7
100kΩ
J1-31
U2-A
2
74HC04
3
U2-B
4
74HC04
TP1-8
J1-35
SCLK
J1-29
TP1-2
DVDD
1
2
3
JU1
C5
0.1µF
4
MAX1132
DIN
DV
DD
6
SHDN
DGND
AV
DD
5
DGND
AVDD
TB1
FB1
JU4
C4
0.22µF
3
C3
2.2µF
10V
2
AGND
REFADJ
CREF
9
1
REF
AIN
20
JU2
19
18
C7
1.0µF
TP1-4
AGND
CS
17
TP1-5
16
15
14
DVDD
C6
0.1µF
TP1-6
13
J1-37
DVDD
J1-36
C8
0.1µF
J1-38
DVDD
13
11
74HC04
U2-F
10
74HC04
U2-G
12
74HC04
8
6
DVDD
FB2
J1-7
J1-8
AVDD
J1-27
NOTES:
1. MINIMIZE PARASITIC CAPACITANCE OF U1 PIN 11–U2 PIN 1.
KEEP THE TRACE SHORT AND KEEP GROUND PLANE 0.025in AWAY.
2. U2 SUPPLY AND GROUND RETURN SHOULD BE ROUTED TO CONNECTOR J1, NOT FLOODED.
Figure 1. MAX1132 EV Kit Schematic Diagram
Use an oscilloscope to verify that the conversion-start
signal is being strobed. Verify that
SHDN
is being dri-
ven high.
Problem: Unacceptable errors when measuring a
transducer.
Although most signal sources can be connected directly
to the MAX1132’s analog input, some high-impedance
signal sources may require an input buffer. Check for
settling errors by increasing the acquisition time: operate
the evaluation kit in external clock mode, 32 clocks per
conversion, with the QSPI clock at its slowest setting.
Problem: Measurements are erratic, unstable; poor
accuracy.
Check the reference voltage and input using a digital
voltmeter. Use an oscilloscope to check for noise.
When probing for noise, keep the oscilloscope ground
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