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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX5389 Evaluation Kit

Evaluates: MAX5389

General Description

The MAX5389 evaluation kit (EV kit) is an assem-

bled and tested PCB that features the MAX5389M

50kI dual digital potentiometer. The EV kit provides a

mechanical pushbutton-controlled interface or a user-

supplied digital interface for the IC digital inputs for

changing the potentiometer wipers.

The EV kit operates from an external 2.8V to 5.5V power

supply applied at the VIN and GND PCB pads. The

MAX5389 operates from a 2.6V to 5.5V VDD supply.

Additional LDO regulators are provided to operate the

MAX5389 VDD input at 2.6V or 3.3V. The on-board regu-

lators require a 200mV overhead above their respective

outputs.

Features

S 2.8V to 5.5V Single-Supply Operation

S 2.6V or 3.3V MAX5389 VDD input

S Supports Pushbutton or Stand-Alone Digital Input

Interfacing

Ordering Information

Component List

Component Suppliers

19-5219; Rev 0; 4/10

+Denotes lead(Pb)-free and RoHS compliant.

Note: Indicate that you are using the MAX5389 when contacting these component suppliers.

PART TYPE

MAX5389EVKIT+ EV Kit

DESIGNATION QTY DESCRIPTION

C1, C3, C5 3

10FF Q10%, 6.3V X5R ceramic

capacitors (0805)

Murata GRM21BR60J106K

TDK C2012X5R0J106K

C2, C4, C6 3

1FF Q10%, 16V X5R ceramic

capacitors (0603)

TDK C1608X5R1C105K

C7 1

0.1FF Q10%, 10V X7R ceramic

capacitor (0603)

Murata GRM188R71H104K

TDK C1608X7R1H104K

C8 0

Not installed, ceramic capacitor

(0603)

J1 1 2 x 8-pin header

JU1 1 4-pin header

JU2–JU11 10 2-pin headers

R1–R6 6

100kI Q5% resistors (0603)

DESIGNATION QTY DESCRIPTION

SW1–SW6 6 Momentary pushbutton switches

U1 1

Dual 50kI potentiometer

(14 TSSOP)

Maxim MAX5389MAUD+

U2 1

3.3V LDO regulator (5 SC70)

Maxim MAX8511EXK33+

(Top Mark: AEI)

U3 1

2.6V LDO regulator (5 SC70)

Maxim MAX8511EXK26+

(Top Mark: AEG)

U4 1

Octal switch debouncer

(20 SSOP)

Maxim MAX6818EAP+

— 11 Shunts (JU1–JU11)

— 1

PCB: MAX5389 EVALUATION

KIT+

SUPPLIER PHONE WEBSITE

Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com

TDK Corp. 847-803-6100 www.component.tdk.com

Summary of content (7 pages)

PAGE 1
9-5219; Rev 0; 4/10 MAX5389 Evaluation Kit The MAX5389 evaluation kit (EV kit) is an assembled and tested PCB that features the MAX5389M 50kI dual digital potentiometer. The EV kit provides a mechanical pushbutton-controlled interface or a usersupplied digital interface for the IC digital inputs for changing the potentiometer wipers. The EV kit operates from an external 2.8V to 5.5V power supply applied at the VIN and GND PCB pads. The MAX5389 operates from a 2.6V to 5.5V VDD supply.
PAGE 2
Evaluates: MAX5389 MAX5389 Evaluation Kit Quick Start Required Equipment • MAX5389 EV kit Procedure The MAX5389 EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Verify that shunts are configured in the EV kit default state for proper startup operation (see Table 1). • 5V, 100mA power supply • Two multimeters 2) Apply a 5V power source across the VIN and GND PCB pads.
PAGE 3
MAX5389 Evaluation Kit The MAX5389 EV kit is an assembled and tested PCB that features the MAX5389M 50kI dual digital potentiometer. Each potentiometer has an end-to-end resistance of 50kI. Each 256-tap wiper position can be controlled independently using pushbutton switches. The EV kit uses a MAX5389M IC in a 14-pin TSSOP package on a proven two-layer PCB design. The EV kit supports both mechanical and digital inputs to control the potentiometer wiper positions using jumpers JU2–JU7.
PAGE 4
Evaluates: MAX5389 MAX5389 Evaluation Kit To increment wiper WA position: 2) Press, then release SW6 (INCB high-to-low transition). 1) Press SW1 and hold (CSA = low), or remove the shunt at jumper JU2. To decrement wiper WB position: 2) Press, then release SW3 (INCA high-to-low transition). 1) Press SW4 and hold (CSB = low), or remove the shunt at jumper JU5. To decrement wiper WA position: 2) Press SW5 and hold (UDA = low). 1) Press SW1 and hold (CSA = low), or remove the shunt at jumper JU2.
PAGE 5
MAX5389 Evaluation Kit Evaluates: MAX5389 Figure 1.
PAGE 6
Evaluates: MAX5389 MAX5389 Evaluation Kit Figure 2. MAX5389 EV Kit Component Placement Guide— Component Side Figure 3. MAX5389 EV Kit PCB Layout—Component Side Figure 4.
PAGE 7
MAX5389 Evaluation Kit REVISION NUMBER REVISION DATE 0 4/10 DESCRIPTION Initial release PAGES CHANGED — Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.