MAX5386MEVMINIQU+ Maxim Integrated, MAX5386MEVMINIQU+ Datasheet - Page 5

• Manufacturer Part Number: MAX5386MEVMINIQU+
• Description: Digital Potentiometer ICs MAX5386/88/91/93 Eval Kit
• Manufacturer: Maxim Integrated

Specifications of MAX5386MEVMINIQU+

• Rohs: yes
• Resistance: 10 kOhms
• Temperature Coefficient: 35 PPM / C
• Tolerance: 25 %
• Number Of Pots: Dual
• Taps Per Pot: 256
• Wiper Memory: Volatile
• Digital Interface: Serial (3-Wire, SPI)
• Description/function: Dual Volatile Low Voltage Linear Taper Digital Potentiometer
• Operating Supply Voltage: 2.6 V to 5.5 V
• Supply Current: 1 uA
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 2.6 V

11)
See the Detailed Description of Software section for more
information on the software features.
The MAX5386M EV kit software GUI shown in Figure 1 is
a Windows program that provides a convenient means
to control the MAX5386M dual potentiometer. Use the
mouse or press the Tab key to navigate through the GUI
controls. The correct SPI write operations are generated
to update the MAX5386M internal memory registers
when any of these controls are executed.
The software divides the EV kit functions into group
boxes. The Interface group box indicates the EV kit
Status and the last write operation Command_ Sent
and Data_ Sent indicators. This data confirms proper
device operation. The Device_ Connected combo box
selects the Maxim part being evaluated and enables
the Update_ Pot_ A_ and_ B checkbox function when
choosing the MAX5391 or MAX5393 option from the
list. The Default button programs both potentiometers
to their midscale positions. The lower Potentiometer_A
and Potentiometer_ B group boxes provide controls to
change the respective wiper positions. The main win-
dow’s bottom-left status bar provides the USB interface
circuit communication status.
The EV kit software can also be used to evaluate
the MAX5386L, MAX5386N, MAX5388, MAX5391, and
MAX5393.
Upon startup, the EV kit software automatically search-
es for the USB interface board’s circuit connection.
In the Interface group box, the Device_ Connected
combo box allows the user to select the proper part
being evaluated. Upon selection of the device being
Figure 2. MAX5386M Evaluation Kit Interface Circuit Popup Window
Detailed Description of Software
The MAX5386M EV kit is now ready for additional
testing.
Graphical User Interface (GUI) Panel
________________________________________________________________________________________ _ 5
Software Startup
MAX5386M Evaluation System
evaluated, the Update_ Pot_ A_ and_ B checkbox is
enabled/disabled. The EV kit enters the normal operat-
ing mode when the USB connection is detected and the
part has been selected. Since the MAX5386M does not
have read capability, all the edit boxes are set to ques-
tion marks (??) and the Potentiometer_ track bar is set
to mid scale. If the USB connection is not detected, the
software prompts the user to retry, exit the program, or
enter the demo mode.
The EV kit software enters the demo mode, when the
USB connection is not detected, by selecting Cancel on
the MAX5386M_Evaluation_Kit_Interface_Circuit popup
window (Figure 2). The software can also enter demo
mode at any time from the main window by selecting
the Options_ |_ Demo_ Mode menu item. When in demo
mode, all software communication to the EV kit circuit
is disabled; however, most of the software GUI is func-
tional. Demo mode allows the user to evaluate the soft-
ware without hardware connectivity. To exit demo mode,
deselect the Options_|_Demo_Mode menu item.
The wiper position track bars (WA, WB) in the
Potentiometer_ A and Potentiometer_ B group boxes
are used to change the wiper position between the H_
and L_ end points. Use the computer mouse or arrow
keys to move the wiper position_ between the 256 posi-
tion points. The wiper position can also be changed by
entering the desired integer value in the edit boxes, or
by pressing the up or down arrows in the respective
edit box. A change in the W_ wiper position_track bars,
or HW_/WL_ edit boxes writes to the registers and the
wiper position is updated with the data sent. The wiper
position is shown in the HW_ and WL_ edit boxes. The
HW_ edit box shows the wiper position with respect to
the potentiometer H end point and the WL_ edit box
shows the wiper position with respect to the potentiom-
eter L _ end point.
Potentiometer A and B Wiper Positions
Demo Mode