MAX1110EVKIT Maxim Integrated Products, MAX1110EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1110EVKIT
• Description: EVAL KIT FOR MAX1110
• Manufacturer: Maxim Integrated Products

Specifications of MAX1110EVKIT

• Number Of Adc's: 1
• Number Of Bits: 8
• Sampling Rate (per Second): 50k
• Data Interface: Serial
• Inputs Per Adc: 8 Single Ended
• Input Range: 0 ~ VREF
• Power (typ) @ Conditions: 0.23mW @ 50kSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Utilized Ic / Part: MAX1110, MAX1112
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4) Connect a 9V to 15V DC power source to the µC
5) Connect a cable from the computer’s serial port to
6) Start the MAX1110 program by opening its icon in
7) The program prompts you to connect the µC mod-
8) Apply input signals to the CH0–CH7 inputs at the
To evaluate the MAX1112, turn off power to the kit,
replace U1 with a MAX1112CPP, and set V
adjusting trim pot R2 on the 68L11D module. No other
hardware changes are necessary. Start the MAX1110
software, and change the assumed reference voltage
from 2.048V to 4.096V. Refer to the section Changing
the Reference Voltage .
To reduce average supply-current demand, the
MAX1110 can be shut down between conversions.
From the Power menu, select Full Power-Down mode.
The amount of power savings depends primarily on
how long the part is off between conversions. The
accuracy of the conversions depends on the power-up
delay, the reference capacitor, and the time in power-
down. Adjust the off-time with the Delay Between
Samples command. Adjust the on-time with the Power-
Up Delay command.
Using an adequate power-up delay ensures conversion
accuracy during power-cycling modes. The reference
must be allowed enough time to stabilize before the
measurement is performed. The Power-Up Delay com-
mand controls the power-up delay. Increase the delay
until no further change in accuracy is observed. The
MAX1110 Evaluation System/
Evaluation Kit
__Detailed Description of Software
2
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.
the µC module. If using a 9-pin serial port, connect
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.
the Program Manager (or Start Menu).
ule and turn its power on. Slide SW1 to the ON posi-
tion. Select the correct serial port, and click OK. The
program automatically downloads KIT1110.L11 to
the module.
right edge of the MAX1110 EV kit board. Observe
the readout on the screen.
_______________________________________________________________________________________
Shutdown Power Cycling
Evaluating the MAX1112
DD
to 5V by
power-up delay requirement depends on the value of
the reference capacitor (C9) and the off-time (delay
between samples).
The MAX1110 EV kit software performs power-up by
starting a conversion and discarding the reading. When
the power-up delay is complete, the reference voltage
is correct, and an accurate measurement can be per-
formed.
On the EV kit board, the MAX1110 draws all its power
through jumper JU5, which is wired closed when the
board is shipped from the factory. To measure the
MAX1110’s supply current, modify the board (with the
power off) by cutting jumper JU5 and connecting a cur-
rent meter across JU5.
The RS-232 serial link limits the data-logging sample
rate to no more than 10 samples per second. The Log
menu can be used to write data to a user-specified file
in comma-spaced-value text format. From the Log
menu, select Select Channels, and select the channels
you want to log. Next, pick the New Log File command
from the Log menu. Once a log file has been opened, it
can be paused or resumed with the Pause command.
One complete line of data is written after all enabled
channels have been sampled. The first line of the log
file contains the column headings. Each subsequent
line of the log file contains all enabled channels, sepa-
rated by commas, tabs, or spaces. The program con-
tinues to write data to the log file until the Done com-
mand is selected from the Log menu.
For sampling rates up to 5ksps, the high-speed sam-
pling commands can be used. Data can be collected
from any single channel at high speed, using the com-
mands on the Sample menu. First, select the number of
samples. Then, set the sampling rate by inserting a
delay between samples, or choosing one of the preset
sample rates. To begin collecting data, use the Collect
command. After the samples have been collected, the
data is automatically uploaded to the host and is
graphed. The data can optionally be saved to a file.
The MAX1110 EV kit software assumes a 2.048V refer-
ence voltage, unless otherwise specified. To change
the reference voltage assumption, use Set Reference
Voltage under the Device menu.
Changing the Reference Voltage
High-Speed Data Sampling
Measuring Supply Current
Low-Speed Data Logging