Evaluates: MAX1202/MAX1203
MAX1202 Evaluation Kit
2
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______________MAX1202 EV System
The MAX1202 EV system operates from a user-
supplied 9V to 15V DC power supply. The Maxim
68L11D 3V µC board uses a MAX667 linear regulator to
generate the 3V logic supply. The MAX1202 board
uses a 78L05 linear regulator to generate its own 5V
analog supply. No level translators are necessary
because the MAX1202 VL pin is connected to the 3V
logic supply.
Quick Start
1) Install the MAX1202 EV kit software on your comput-
er by running the
INSTALL.EXE program on the flop-
py disk. The Windows 3.1 Program Manager (or the
Windows 95 Start Menu) copies the program files
and creates icons for them.
2) Check the jumper settings on the EV board. Refer to
Tables 1 and 2.
3) Carefully connect the boards by aligning the EV kit’s
40-pin header with the µC module’s 40-pin connec-
tor. Gently press them together. The two boards
should be flush against one another.
4) Connect a 9V to 15V DC power source to the µC
module at the terminal block located next to the
on/off switch, in the upper-right corner of the µC
module. Observe the polarity marked on the board.
5) Connect a cable from the computer’s serial port to
the µC module. If using a 9-pin serial port, use a
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 is required. The EV
kit software checks the modem status lines (CTS,
DSR, DCD) to confirm that the correct port has been
selected.
6) Start the MAX1202 program by opening its icon in
the Program Manager (or Start Menu).
7) The program will prompt you to connect the µC
module and turn its power on. Slide SW1 to the on
position. Select the correct serial port and click OK.
The program automatically downloads
KIT1202.L11
to the module.
8) Apply input signals to the CH0–CH7 inputs at the
right edge of the MAX1202 EV board. Observe the
readout on the screen.
Evaluating the MAX1203
To evaluate the MAX1203, turn off the power to the EV kit,
close JU3, and replace U1 with a MAX1203BCPP.
Connect the external voltage reference to the VREF
pad. No other hardware changes are necessary. Refer
to the section
Changing the Reference Voltage.
Table 1. Jumper Functions
∫
JUMPER
STATE
FUNCTION
1-2
V
SS
tied to GND
Closed
(default trace)
Current-sense jumper. The
MAX1202 draws its +5V analog
supply through this trace.
2-3
V
SS
tied to -5V
Open
V
SS
must be supplied by the user.
1-2
SHDN
tied to GND; power-down
2-3
SHDN
tied to +5V; internal com-
pensation
Open
SHDN
floating; external compen-
sation
Closed
REFADJ = +5V; VREF must be
supplied by the user.
Open
REFADJ = open; VREF = 4.096V
internal reference (MAX1202)
Open
Do not operate kit with JU4 open.
JUMPER
DEFAULT
STATE
FUNCTION
JU1
2-3
V
SS
tied to -5V
JU2
2-3
SHDN
tied to +5V
JU3
Open
REFADJ = open; VREF = 4.096V
internal reference (MAX1202)
JU4
Closed
The MAX1202 draws its +5V
analog supply through this trace.
JU1
JU2
JU3
JU4
Table 2. Default Jumper Settings
