MAX5423 MAXIM [Maxim Integrated Products], MAX5423 Datasheet

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MAX5423

Manufacturer Part Number
MAX5423
Description
Evaluation Kit
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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The MAX5422 evaluation kit (EV kit) is an assembled
and tested PCB that evaluates the MAX5422 IC. The
MAX5422 is a 50kΩ 256-tap, nonvolatile, linear digital
potentiometer communicating over SPI™. The
MAX5422 features an internal nonvolatile EEPROM
used to store the potentiometer’s wiper position for ini-
tialization during power-up. The EEPROM is pro-
grammed through the SPI-compatible serial interface,
communicating at data rates up to 5MHz. The SPI sig-
nals can be transmitted through an on-board USB inter-
face circuit using a computer or a user-supplied SPI
bus along with PCB headers on the EV kit.
The EV kit also features Windows 2000/XP/Vista
patible software that provides a professional user inter-
face for exercising the MAX5422’s features. The program
is menu driven and offers a graphical user interface
(GUI) complete with buttons, track bars, and spin boxes.
The MAX5422 IC is powered from a 3.3V source gener-
ated from the EV kit’s USB interface circuit, or an exter-
nal user-supplied 2.7V to 5.25V DC power supply. The
MAX5422 section can be broken out from the EV kit,
allowing the MAX5422 to be attached to the user appli-
cations with minimal additional circuit area.
The EV kit can also evaluate the MAX5423 (100kΩ)
or MAX5424 (200kΩ) after IC replacement (U1). The
MAX5422 EV kit is shipped with a MAX5422ETA+
IC installed.
19-4171; Rev 0; 6/08
SPI is a trademark of Motorola, Inc.
Windows Vista is a registered trademark of Microsoft Corp.
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.
DESIGNATION
C17, C21–C25
C14, C16, C26
C2, C13, C15
C1, C3–C10,
C11, C12
QTY
________________________________________________________________ Maxim Integrated Products
15
3
2
3
General Description
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K or
TDK C1608X7R1C104K
10µF ±20%, 6.3V X5R ceramic
capacitors (0805)
Murata GRM21BR60J106M or
TDK C2012X5R0J106M
10pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J or
TDK C1608C0G1H100J
1µF ±10%, 10V X5R ceramic
capacitors (0603)
Murata GRM188R61A105K or
TDK C1608X5R1A105K
DESCRIPTION
®
-com-
MAX5422 Evaluation Kit
♦ Power-On Recall of Wiper Position from
♦ 2.7V to 5.25V Single-Supply Operation
♦ On-Board USB Interface Circuit for SPI-
♦ Proven USB-PC Connection for Power and
♦ Main Circuit Breakout Board
♦ PCB Headers for User-Supplied SPI-Compatible
♦ PCB Pads for Potentiometer Signals L, W, and H
♦ Evaluates the MAX5422ETA/MAX5423ETA/
♦ Windows 2000/XP/Vista (32-Bit)-Compatible
♦ Fully Assembled and Tested
+ Denotes lead-free and RoHS compliant.
DESIGNATION
Nonvolatile Memory
Compatible Signals
Control (USB Cable Included)
Signals
MAX5424ETA in 3mm x 3mm x 0.8mm, 8-Pin
TDFN Package
Software
C18, C19
JU1, JU2
J1, J2
C20
FB1
JU3
MAX5422EVKIT+
D1
PART
QTY
2
1
1
0
2
2
1
Ordering Information
22pF ±5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J or
TDK C1608C0G1H220J
3300pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H332K or
TDK C1608X7R1H332K
Green LED (0603)
Panasonic LNJ314G8TRA
Not installed, ferrite bead inductor
(0603)
2 x 6-pin headers
3-pin headers
2-pin header
Component List
DESCRIPTION
TYPE
EV Kit
Features
1

Related parts for MAX5423

MAX5423 Summary of contents

Page 1

... MAX5422 section can be broken out from the EV kit, allowing the MAX5422 to be attached to the user appli- cations with minimal additional circuit area. The EV kit can also evaluate the MAX5423 (100kΩ) or MAX5424 (200kΩ) after IC replacement (U1). The MAX5422 EV kit is shipped with a MAX5422ETA+ IC installed ...

Page 2

... EP = Exposed pad. SUPPLIER Hong Kong X'tals Ltd. Murata E lectronics North America, Inc. Panasonic Corp. 800-344-2112 www.panasonic.com TDK Corp. Note: Indicate that you are using the MAX5422, MAX5423, or MAX5424 when contacting these component suppliers. FILE INSTALL.EXE MAX5422.EXE FTD2XX.INF UNINST.INI USB_Driver_Help.PDF Quick Start The MAX5422 EV kit is fully assembled and tested ...

Page 3

Verify that shunts are correctly installed on the follow- ing jumpers and headers listed in the table below: SHUNT JUMPER EV KIT FUNCTION POSITION EV kit powered by the 3.3V gener- JU1 1-2 ated from the USB interface circuit ...

Page 4

MAX5422 Evaluation Kit Detailed Description of Software Graphic User Interface (GUI) Panel The MAX5422 EV kit software GUI shown in Figure Windows program that provides a convenient means to control the MAX5422. Use the mouse or press ...

Page 5

The Wiper Position track bar in the Potentiometer Control group box is 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 ...

Page 6

... Data Sent indicator is hidden when these two com- mands are executed. The MAX5422 IC uses an 8-bit (MSBs, D7–D0) data byte to set the wiper position. Refer to the MAX5422/ MAX5423/MAX5424 IC data sheet for additional information. Keyboard Navigation Press the Tab key to select each GUI control. The selected control is indicated by a dotted outline ...

Page 7

Figure 3. Simple Low-Level 3-Wire Interface General Troubleshooting Problem: Software reports it cannot find the inter- face circuit. • Is the interface circuit power LED lit? • Is the USB cable connected? • Has Windows plug-and-play detected the board? Bring ...

Page 8

MAX5422 Evaluation Kit The MAX5422 main circuit area consists of the MAX5422 IC U1, decoupling capacitors C25 and C26, jumpers JU1, JU2, and JU3, header J2, and PCB pads VCC, and GND. The MAX5422 main circuit PCB ...

Page 9

... The MAX5422 EV kit can also evaluate the MAX5423ETA or the MAX5424ETA. Remove the MAX5422ETA IC (U1) and replace it with the desired IC. The MAX5423ETA and MAX5424ETA ICs are pin and functional compatible with the MAX5422ETA IC. Refer to the MAX5422/MAX5423/MAX5424 IC data sheet for a complete description of part-to-part differences. ...

Page 10

MAX5422 Evaluation Kit Figure 4a. MAX5422 EV Kit Schematic (Sheet ______________________________________________________________________________________ ...

Page 11

Figure 4b. MAX5422 EV Kit Schematic (Sheet ______________________________________________________________________________________ MAX5422 Evaluation Kit 11 ...

Page 12

MAX5422 Evaluation Kit Figure 5. MAX5422 EV Kit Component Placement Guide— Component Side 12 ______________________________________________________________________________________ Figure 6. MAX5422 EV Kit PCB Layout—Component Side ...

Page 13

Figure 7. MAX5422 EV Kit PCB Layout—Solder Side 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 ...

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