MAX5498EVKIT+ Maxim Integrated Products, MAX5498EVKIT+ Datasheet - Page 5

• Manufacturer Part Number: MAX5498EVKIT+
• Description: KIT EVAL FOR MAX5498
• Manufacturer: Maxim Integrated Products

Specifications of MAX5498EVKIT+

• Main Purpose: Digital Potentiometer
• Utilized Ic / Part: MAX5494, MAX5495, MAX5496, MAX5497, MAX5498, MAX5499
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The Command History group box displays the
sequence of bytes sent to the device for each of the
GUI’s button controls. For the write controls (Write and
Write NV), the group box displays the command byte fol-
lowed by the 2 data bytes (wiper setting). The 2 data
bytes correspond to the W-L tap value. For the save,
load, and copy controls the group box displays the asso-
ciated command byte. All values are displayed in hex.
The MAX5498 EV kit software can also be used to
evaluate any of the other devices in the MAX5494–
MAX5499 family. The software is reconfigured for each
device by choosing the device number from the
Options | Device menu bar. To ensure proper opera-
tion, install the alternate device on the EV kit before
reconfiguring the software.
When you type on the keyboard, the system must know
which control should receive the keys. Press the Tab
key to move the keyboard’s focus from one control to
the next. The focused control is indicated by a dotted
outline. Shift + Tab moves the focus to the previously
focused control. Buttons respond to the keyboard’s
space bar. Some controls respond to the keyboard’s up
and down arrow keys. Activate the program’s menu bar
by pressing the F10 key, and then press the letter of the
menu item you want. Most menu items have one letter
underlined, indicating their shortcut key.
As configured, the MAX5498 EV kit evaluates the
MAX5498 dual, linear-taper potentiometer with one
programmable voltage-divider and one variable resis-
tor. The potentiometer terminals are accessible from
headers H1 and H2. The MAX5498 EV kit hardware and
software can also be used to evaluate the MAX5494–
MAX5497 or MAX5499. The installed device is con-
trolled using a graphical user interface (GUI) that can
be downloaded by visiting www.maxim-ic.com/evkitsoft-
ware and clicking on the MAX5498 EVKIT software link.
The L terminals of each digital pot are linked to ground
by placing a shunt on pins 3-4 of headers J1 and J2
(see Table 2). This provides a ground reference when
using nonground referenced test equipment (e.g.,
handheld digital multimeter).
Detailed Description of Hardware
Ground Referencing Test Equipment
_______________________________________________________________________________________
Evaluating Other Devices
Keyboard Navigation
Command History
MAX5498 Evaluation Kit
To evaluate the MAX5494–MAX5497 or MAX5499, con-
tact the factory for a free sample of the MAX5494ETE+,
MAX5495ETE+, MAX5496ETE+, MAX5497ETE+, or
MAX5499ETE+. Refer to the MAX5494–MAX5499 IC
data sheet for additional device information.
The MAX5498 EV kit can be modified for use with an
external user-supplied SPI interface. First, with power
off and USB disconnected, turn the board over and cut
the four traces that are on the back of the board, under-
neath location J3. Install a standard dual-row header
and connect an external SPI interface. See Figure 2a
for the J3 schematic and Figure 4 for J3 trace locations
on the bottom side of the PCB.
The MAX5498 EV kit’s default configuration is for single-
supply operation. The USB interface and microcontroller
are powered from the USB bus voltage (5V). The device
under test can be powered from an external power sup-
ply (2.7V to 5.25V) connected between VDD and GND
(see Table 3). When operating with a single supply, the
VSS input should be connected to GND (Table 4).
Table 2. J1 and J2 Shunt Configuration
* Default position.
Table 3. JU1 Jumper Functions
* Default position.
POSITION
SIGNAL
installed
SHUNT
VDD
3-4*
Not
External User-Supplied SPI Interface
POSITION
SHUNT
MAX5494–MAX5497 or MAX5499
L1, L2
L1, L2
Open
1-2*
2-3
PIN
Single-Supply Operation (VDD)
L ter m i nal s connected to GN D ( use
w hen m easur i ng d i g i tal p ot r esi stance)
L terminals unconnected
Power device from USB 5V supply.
D o not use—devi ce w i l l not b e p ow er ed .
Power device from external power
supply (2.7V to 5.25V) connected
between VDD and GND pads.
EV KIT FUNCTION
DESCRIPTION
Evaluating the
5