MAX5393EVMINIQU+ Maxim Integrated, MAX5393EVMINIQU+ Datasheet - Page 9

• Manufacturer Part Number: MAX5393EVMINIQU+
• Description: Digital Potentiometer Development Tools MAX5393 Eval Kit
• Manufacturer: Maxim Integrated
• Series: MAX5391, MAX5393r

Specifications of MAX5393EVMINIQU+

• Rohs: yes
• Product: Evaluation Systems
• Tool Is For Evaluation Of: MAX5393
• Resistance: 50 kOhms
• Operating Supply Voltage: 1.7 V to 5.25 V
• Interface Type: 3 Wire, Serial, USB

Jumper JU19 selects the power source for the MAX5393
VDD input. Install a shunt across pins 1-2 to set the
MAX5393 VDD input to 1.7V. Install a shunt across pins
2-3 to set the MAX5393 VDD input to the VPOWER rail.
See Table 5 for proper jumper configuration for the
MAX5393 VDD power-supply input.
The MAX5393 features a clock and data-/chip-select
input pins for SPI-compatible communication to control
the wiper position. The clock and data-/chip-select pins
can be driven by the MINIQUSB+ interface circuit or the
PCB header (J1), along with a user-supplied external
SPI-compatible controller. An external SPI-compatible
controller can be connected to CS (J1-3), DIN (J1-5),
SCLK (J1-7), and GND (J1-2, J1-4, J1-6, J1-8) on header
J1 to communicate with the MAX5393 IC. When using
an external SPI-compatible controller, verify that the
MINIQUSB+ interface board has been disconnected
from the EV kit’s J2 and J3 headers. See Table 5 for
header J1 pin assignment.
Table_7._JU12_and_JU13_Jumper_Functions_(Potentiometer_A)
*Default position.
Table_8._JU14_and_JU15_Jumper_Functions_(Potentiometer_B)
*Default position.
Table_6._Header_J1_Pin_Assignment
Not installed
Not installed
Installed*
Installed*
J1-2, J1-4, J1-6, J1-8
JU12
JU14
SHUNT_POSITION
SHUNT_POSITION
J1-1
J1-3
J1-5
J1-7
MAX5393 VDD Input Configuration
PIN
SPI Clock and Data-/Chip-Select Inputs
________________________________________________________________________________________ _ 9
Not installed
Not installed
Not installed
Not installed
Installed*
Installed*
Installed
Installed
JU13
JU15
Connected to VDD
Connected to VDD
Not connected
Not connected
HA_PAD
HB_PAD
VPOWER
SIGNAL
SCLK
GND
DIN
CS
MAX5393 Evaluation System
Connected to GND
Connected to GND
Connected to GND
Connected to GND
Not connected
Not connected
Not connected
Not connected
LA_PAD
LB_PAD
The EV kit provides an option to configure the MAX5393
as a potentiometer or voltage-divider, open-ended or
with ground reference, respectively. Use jumpers JU12
and JU13 for potentiometer A, and jumpers JU14 and
JU15 for potentiometer B configurations. See Tables 7
and 8 for jumper options for configuring potentiometers
A and B.
The MAX5393 IC can also be configured as a variable
resistor by shorting the H_ and W_ pads together using
a wire. When operating as a variable resistor, any power
source connected to the H_, W_, or L_ pads must be
voltage and current limited to the maximum conditions
stated in the MAX5391/MAX5393 IC data sheet.
Note:_To test the device in resistor mode, the ohmmeter
must be GND referenced to the MAX5393. This can be
accomplished by connecting the L_ pin to GND or the H_
pin to VDD. Resistance can then be measured between
W_ and L_ or W_ and H_PCB pads.
The EV kit is populated with additional PCB footprints
(U1, U2, and U4) and various jumpers to evaluate the
MAX5386M, MAX5391, and MAX5388, respectively.
Note: It is recommended that the CS, DIN, and SCLK
signals not drive more than one device at any given time.
Refer to the MAX5386M, MAX5388, or MAX5391L/
MAX5391N EV system data sheets for additional infor-
mation when evaluating the_ MAX5386M, MAX5388, or
MAX5391 digital potentiometers.
Potentiometer, Voltage-Divider or Variable Resistor,
Potentiometer open ended
Potentiometer with GND reference
Voltage-divider open ended
Voltage-divider with GND reference
Potentiometer open ended
Potentiometer with GND reference
Voltage-divider open ended
Voltage-divider with GND reference
Evaluating the MAX5386M/
MAX5393_FUNCTION
MAX5393_FUNCTION
MAX5388/MAX5391 ICs
with Ground Reference