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MAX9959 Evaluation Kit
Figure 2. MAX9959 EV Kit Quick Start Settings
Signals
MSBIT , HIZMPB , IDDQSEL , and CLRB are signals that
can be used in different settings. HIZMPB and
IDDQSEL are signals for the MAX9959. Each MAX9959
device can have its own set of HIZMPB and IDDQSEL
signals, but the EV kit shares the same set of signals for
both MAX9959 devices on-board. The HIZMPB signal
is shared in functionality with the HIZMSB bit and inter-
nally both bits are ANDed. CLRB resets the MAX5735
and MAX531 outputs to 0V, and sets CLH to the max
value and CLL to its min value. MSBIT is used for
Master/Slave configuration. MSBIT is only selectable in
Manual Control .
Detailed Description of Hardware
The MAX9959 EV kit provides a proven reference
design for connecting two MAX9959 devices in a daisy-
chain configuration. Headers for power, SPI, and ana-
log voltages are provided for customized testing. The
MAX5735 provides the analog voltages to the
MAX9959. The MAX531 provides the GND-shifting volt-
age for calibrating the GND level on the MAX5735. The
MAX5735 is a 32-channel DAC, but only 14 channels
are used in the MAX9959 EV kit design. Headers J2
and J3 provide test points for the MAX5735 outputs.
Various test points are available for different signals
and LEDs indicate status information. The EV kit uses
banana plugs for the outputs and inputs because of
their high-current capability. Fan headers are provided
to power two fans to cool the MAX9959 devices.
Operating without the fans does not damage the
MAX9959 devices even at high current because they
have a thermal-shutdown feature that shuts off the IC
when the die temperature exceeds the thermal limit.
6
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