MAX5386MEVMINIQU+ Maxim Integrated, MAX5386MEVMINIQU+ Datasheet - Page 7

• 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

Figure 3. Simple Low-Level 3-Wire Interface
Problem:_Software_reports_it_cannot_find_the_interface_
circuit:
• Is the USB cable connected to the MINIQUSB+ board?
• Has Windows plug-and-play detected the board?
• If using an off-board SPI interface, is the power ground
Bring up Control_ Panel->System->Device_ Manager,
and look at what device nodes are indicated for USB.
If there is an Unknown_ device_ node attached to
the USB, uninstall it—this forces plug-and-play to try
again.
connected to the EV kit ground (GND) at one of the
header J1 pin connections (J1-2, J1-4, J1-6, or J1-8)?
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General Troubleshooting
MAX5386M Evaluation System
The MAX5386M evaluation kit (EV kit) is an assembled
and tested PCB that features the MAX5386M dual 50kI
digital potentiometers. Both potentiometer A and B have
an end-to-end resistance of 50kI and each wiper can be
programmed independently among 256 tap positions.
The EV kit uses a MAX5386M IC in a 16-pin thin QFN
package on a proven two-layer PCB design.
The EV kit provides connector J1 to interface with the
MAX5386M CS, DIN, SCLK, and GND signals directly
to a user-supplied 3-wire system. Connector J1 also
provides a connection for the MAX5386M EV kit’s 2.6V
to 5.5V VPOWER power-supply input.
The EV kit is typically used with a MINIQUSB+ interface
board for communicating with a PC through the 3-wire
serial interface. Logic-level translators U7 and U8 pro-
vide proper SPI interface translation when using 2.6V to
5.5V to power the MAX5386M VDD input.
Detailed Description of Hardware