MAX5387EVKIT+ Maxim Integrated, MAX5387EVKIT+ Datasheet - Page 6

• Manufacturer Part Number: MAX5387EVKIT+
• Description: Digital Potentiometer Development Tools Maxim Evaluation Kit
• Manufacturer: Maxim Integrated

Specifications of MAX5387EVKIT+

• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX5387
• Resistance: 10 kOhms
• Operating Supply Voltage: 2.6 V to 5.5 V
• Description/function: Dual Low Voltage Digital Potentiometer
• Interface Type: 2 Wire, Serial

MAX5387 Evaluation System
Figure 2. MAX5387 Evaluation Kit Popup Window (Interface Board Not Found)
Figure 3. MAX5387 Evaluation Kit Popup Window (No Devices Found)
Device Address combo box to select a valid address and a
status indicator to indicate which device is connected. An
Update Pot A and B checkbox is available for updating
both potentiometers A and B simultaneously. A Default
button resets the respective IC’s potentiometer A and B
wiper positions to the factory-default midscale position.
Each tab sheet contains a Device Address combo
box and a U_ Status indicator. The U1_MAX5387 and
U3_MAX5392 Device Address combo boxes store up
to eight device addresses found by the EV kit software.
The eight possible addresses are shown in Table 4. Use
the Device Address combo box to select between dif-
ferent devices that share the same bus. Before selecting
U1 and U3 addresses, verify jumpers JU7, JU8, JU9
(U1) and JU15, JU16, and JU17 (U3) settings and then
select the correct addresses using the U1_MAX5387 and
U3_MAX5392 tab sheets’ Device Address combo boxes.
U2_MAX5387 and U4_MAX5392 Device Address combo
boxes store addresses 0x52 and 0x5A, respectively.
The U_ Status indicator displays Device Connected when
the selected address is found or No Connection when the
selected address is not found. When selecting an address
currently in use, the Device Address combo box is set to
?? and the U_ Status indicator displays No Connection.
Pressing the Default button resets potentiometer A and B
wiper positions to the factory-default midscale position.
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Device Address
Factory Default
The wiper position track bars (WA and 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 position 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 volatile memory 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 posi-
tion with respect to the H_ end point and the WL_ edit box
shows the wiper position with respect to the potentiometer
L_ end point.
Potentiometers A and B can be updated simultaneously
by checking the Update Pot A and B checkbox. When
enabled, the Potentiometer A group box sends the same
data to both digital potentiometers using the 0x13 com-
mand to control both digital potentiometers together.
The U_ Command Sent indicators in the DEVICES
group box display the last command sent from the
master (software) to the MAX5387. There are three
MAX5387 commands available in the MAX5387 IC.
Table 2 describes the three MAX5387 commands.
Potentiometer A and B Wiper Positions
Command Sent Indicator