MAX1038EVKIT Maxim Integrated, MAX1038EVKIT Datasheet - Page 3

• Manufacturer Part Number: MAX1038EVKIT
• Description: Data Conversion IC Development Tools
• Manufacturer: Maxim Integrated
• Series: MAX1036, MAX1037, MAX1038, MAX1039r

Specifications of MAX1038EVKIT

• Interface Type: Serial (2-Wire, I2C)

The Read ADC button manually reads the MAX1038
while using the current setup and configuration byte set-
tings. When the AutoRead checkbox is checked, the
software automatically reads the MAX1038 approxi-
mately every 300ms. AutoRead allows users to modify
the setup and configuration bytes on-the-fly without hav-
ing to manually press the Read ADC button each time.
The Setup Byte always begins with a start bit value of 1.
The SEL2, SEL1, and SEL0 bits control the state of the
reference. The CLK bit selects either internal clock or
external clock mode. The UNI/BIP bit selects either
unipolar or bipolar mode. Setting RST to zero resets the
configuration register. The setup register remains
unchanged. The X Don’t Care bit can be ignored. Refer
to the MAX1038 data sheet for more information on the
SEL2, SEL1, and SEL0 bits within the Setup Byte.
The Config Byte always begins with a start bit value of
zero. The SCAN1 and SCAN0 bits select the scanning
mode. The CS3, CS2, CS1, and CS0 bits select one of
the twelve analog input channels. The SE/DIFF bit
selects either single-ended or differential mode. Refer
to the MAX1038 data sheet for more information on the
SCAN1, SCAN0, CS3, CS2, CS1, and CS0 bits within
the Config Byte.
The evaluation software assumes a 4.096V reference
voltage, unless otherwise specified. To override the
internal 4.096V reference value, ensure bit SEL2 equals
zero and bit SEL1 equals 1 within the Setup Byte.
Then, apply the new reference voltage at the VREF pad
on the board, type in the new reference voltage, without
the volt unit, and press the Set Vref button. The EV kit
software uses the value typed in the Vref field to trans-
late the digital code to a voltage.
_______________________________________________________________________________________
Configuration Byte
Reference Voltage
Setup Byte
Read ADC
MAX1038 Evaluation Kit
When you type on the keyboard, the system must know
which control should receive the keystrokes. Press the
TAB key to move the keyboard’s focus from one control
to the next. The focused control is indicated by a dotted
outline. SHIFT+TAB moves the focus to the previously
focused control. Buttons respond to the keyboard’s
SPACE bar. Some controls respond to the keyboard’s
UP and DOWN arrow keys. Activate the program’s
menu bar by pressing the F10 key, then press the letter
of the menu item you want. Most menu items have one
letter underlined, indicating their shortcut key.
The MAX1038 is a twelve channel (six-differential-chan-
nel) 8-bit ADC with a 2-wire serial interface. The open-
collector inverter (U2) interfaces the PC parallel port to
the 2-wire serial interface. U2 and the associated cir-
cuitry are only required when interfacing to the parallel
port. Power the MAX1038 EV kit from a 5V DC power
supply.
The MAX1038 EV kit provides a proven PC board layout
and software to evaluate the features of the MAX1038.
The Windows software only supports a 2-wire serial
interface in S-Mode. To evaluate the MAX1038 with a
user-supplied 2-wire serial interface in F-Mode or HS-
Mode, do the following:
1) Disconnect the MAX1038 EV kit from the PC parallel
2) Install 3kΩ resistors at locations R16 and R22. (This
3) Connect the 2-wire bus to the SDA, SCL, and
4) Refer to the MAX1038 data sheet to ensure all timing
port.
resistor value may require optimization for each
system.)
GND pads.
specifications are met.
User-Supplied 2-Wire Interface
Detailed Description
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