MAX1168EVKIT Datasheet, PDF (4/11 Pages) Maxim Integrated Products – MAX1168 Evaluation Kit/Evaluation System

MAX1168 Evaluation Kit/Evaluation System
Table 1. Software Control Descriptions (continued)
CONTROL
DESCRIPTION
The Set Vref button allows the user to specify the actual reference voltage. The evaluation software
assumes a +4.096V reference voltage, unless otherwise specified. To override the default +4.096V software
reference value, measure the actual reference voltage at the terminal block (TB0) on the MAX1168 EV kit
board and enter the new reference voltage, without the volt unit. Finally, press the Set Vref button. The EV kit
software uses the value typed in the Vref field to translate the digital code to a voltage.
Pressing the Read ADC button performs the conversion(s) specified by the control byte and reads back
the result(s).
Checking the AutoRead checkbox performs the conversion(s) specified by the control byte and reads
back the result(s) every 500ms. A blinking asterisk indicates AutoRead is active.
The Exit button closes the program
Detailed Description of Hardware
MAX1168 EV System
The MAX1168 EV system is a complete 8-channel, 16-
bit data-acquisition system consisting of a MAX1168 EV
kit and a Maxim 68HC16MODULE-DIP µC module. The
MAX1168 EV system is used to evaluate the MAX1168
8-channel, 16-bit serial ADC. See the Quick Start sec-
tion for setup and operating instructions. See Table 1 for
more information on the provided Windows software.
MAX1168 EV Kit
The MAX1168 EV kit board provides a proven layout for
evaluating the MAX1168 8-channel, 16-bit ADC and can
be obtained separately without the µC module for use
with an existing µC. The MAX1168 EV kit contains two
different types of buffers. U2 is a logic buffer to limit the
load capacitance that is seen by the DOUT line of the
MAX1168. U3–U10 are 16-bit accurate analog buffers
connected in the unity-gain configuration. U1 is powered
from V_DD and U3–U10 are powered from V_DD and V_EE.
U3 is powered from the µC module (J1-7, J1-8). A termi-
nal block (TB0) has also been provided on the MAX1168
EV kit board for evaluating external reference mode.
Refer to the MAX1167/MAX1168 or MAX1067/ MAX1068
data sheets to ensure all interface timing specifications
are met.
The MAX1168 and MAX1168 EV kit board support DSP
and 16-bit-wide data-transfer mode. Jumpers JU1 and
JU2 can be configured for these modes; however, the
supplied EV kit Windows-compatible software does not
support these two modes. Please refer to the
MAX1167/MAX1168 or MAX1067/MAX1068 data sheets
for more information.
Table 2. DSP Frame Sync Receive Input
(DSPR)
JUMPER
SHUNT
POSITION
DESCRIPTION
ON*
DSP mode disable
JU1
OFF
*Default configuration.
DSP mode enable (the supplied
Windows software does not
support this mode)
Table 3. Data Bit Transfer Select Input
(DSEL)
JUMPER
SHUNT
POSITION
DESCRIPTION
16-bit-wide data-transfer mode
1–2
(the supplied Windows software
JU2
does not support this mode)
2–3*
*Default configuration.
8-bit-wide data-transfer mode
Caution: Do not connect an external controller to
the DSEL pad while a shunt is on jumper JU2.
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