19-0952; Rev 0; 8/07 MAX5488 Evaluation Kit The MAX5488 evaluation kit (EV kit) is an assembled and tested printed-circuit board (PCB) that demonstrates the functionality of the MAX5488 dual, 256-tap, nonvolatile, SPI-interface, linear-taper digital potentiometer. Windows® 98SE/2000/XP-compatible software provides a handy user interface to exercise the features of the MAX5488. The tiny 16-pin, 3mm x 3mm, thin QFN-packaged device is socketed, allowing for easy evaluation of the MAX5487 (10kΩ end-to-end resistance), MAX5488 (50kΩ end-to-end resistance), or MAX5489 (100kΩ end-to-end resistance) ICs. To evaluate the MAX5487 or the MAX5489, request a free sample (ETE suffix) along with the MAX5488 EV kit. Features ♦ Power-On Recall of Wiper Position from Nonvolatile Memory ♦ 2.7V to 5.25V Single-Supply Operation ♦ SPI-Compatible Serial Interface ♦ Convenient GUI Software ♦ Labeled Test Points for H_, W_, and L_ ♦ Assembled and Tested USB-Compatible PCB Layout ♦ Socketed 16-Pin Thin QFN-EP (3mm x 3mm) ♦ Evaluates MAX5487/MAX5488/MAX5489 Ordering Information PART TYPE PC INTERFACE MAX5488EVKIT# EV kit #Denotes an RoHS-compliant EV kit. USB Component List DESIGNATION QTY DESCRIPTION C1, C5–C9, C17, C18, C37 9 0.1µF ±10%, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104K Taiyo Yuden EMK107BJ104KA Murata GRM188R71C104K C2 0 Not installed, capacitor (1206) 1 0.033µF ±10%, 16V (min) X5R ceramic capacitor (0603) Taiyo Yuden EMK107BJ333KA Murata GRM188R71E333K TDK C1608X7R1E333K C4 C15, C16 C30, C31 C38, C40 2 2 2 10pF ±5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H100J TDK C1608C0G1H100J Taiyo Yuden UMK107CG100DZ 22pF ±5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H220J TDK C1608C0G1H220J Taiyo Yuden UMK107CG220KZ 10µF ±20%, 16V X5R ceramic capacitors (1206) Murata GRM31CR61C106M TDK C3216X5R1C106M Panasonic ECJ3YB1C106M KEMET C1206C106M4PAC DESIGNATION QTY DESCRIPTION C39 1 1µF ±10%, 16V X5R ceramic capacitors (0603) TDK C1608X5R1C105K Murata GRM188R61C105K AVX 0603YD105MAT KEMET C0603C105K4PAC D1 1 Red LED (0805) Lumex Opto SML-LX0805SIC-TR H1, H2 2 4-pin headers J1 1 USB series B right-angle PC-mount receptacle Assmann Electric AU-Y1007-R J2 0 Not installed, header J3 0 Not installed, 2 x 5-pin JTAG header JU1 1 3-pin header 1 70Ω, 4A ferrite bead (0603) TDK MMZ1608R301A Murata BLM18SG700 TN1 L6 R1, R2 2 27Ω ±5% resistors (0603) R3 1 1.5kΩ ±5% resistor (0603) R4, R7 2 470Ω ±5% resistors (0603) R5 1 2.2kΩ ±5% resistor (0603) R6 1 10kΩ ±5% resistor (0603) R8, R26 2 0Ω resistors (0603) Windows is a registered trademark of Microsoft Corp. ________________________________________________________________ Maxim Integrated Products 1 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. Evaluates: MAX5487/MAX5488/MAX5489 General Description Evaluates: MAX5487/MAX5488/MAX5489 MAX5488 Evaluation Kit Component List (continued) DESIGNATION QTY R9, R10, R11 0 Not installed, resistors (0603) 1 0 Not installed, resistors—short by PC trace (0402) Y2 R12–R16 20MHz crystal SunTsu SCD20B-20.000MHZ-I Citizen HCM49-20.000MABJ-UT Y3 0 Not installed, 32.768kHz crystal 1 MAX5488SOCKET (16-pin thin QFNEP, 3mm x 3mm) Plastronics 16QN50K23030 Y4 1 6MHz crystal Citizen HCM49-6.000MABJ-UT SunTsu SCD22B-6.000MHZ-I — 4 Bumps 3M SJ-5003BK — 1 Shunt (JU1) — 1 Maxim sample box containing three ICs MAX5488ETE#G16 (16-pin thin QFN-EP) — 1 USB high-speed A-to-B cables 5ft (1.5m) — 1 PCB: MAX5488 Evaluation Kit# U1 DESCRIPTION DESIGNATION U2 1 MAX3390EEUD+ (14-pin TSSOP) U4 1 MAXQ2000-RAX+ (68-pin QFN-EP, 10mm x 10mm) 1 USB UART FTDI FT232BL (32-pin TQFP, 7mm x 7mm) U5 U6 1 93C46 type 3-wire EEPROM Atmel AT93C46A-10SU-2.7 (8-pin SO) U7 1 MAX8511EXK25+ LDO regulator (5-pin SC70) QTY DESCRIPTION Component Suppliers SUPPLIER AVX Corp. PHONE 843-946-0238 WEBSITE www.avxcorp.com KEMET Corp. 864-963-6300 www.kemet.com Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com Panasonic Corp. 800-344-2112 www.panasonic.com Taiyo Yuden 800-348-2496 www.t-yuden.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX5488 when contacting these component suppliers. 2 _______________________________________________________________________________________ MAX5488 Evaluation Kit Recommended Equipment Before beginning, the following equipment is needed: • Maxim MAX5488 EV kit (includes USB type A-B cable) • Sample MAX5488ETE#G16 device (included with MAX5488 EV kit) • User-supplied Windows 98SE/2000/XP-compatible PC with a spare USB port • Administrator privileges may be required when first installing the device on Windows 2000/XP • Two ohmmeters • Tweezers to move the MAX5488 sample into its socket Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV Kit software. Text in bold and underlined refers to items from the Windows 98SE/2000/XP operating system. Procedure The MAX5488 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power until all connections are completed. 1) Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 5488Rxx.ZIP. Save the EV kit software to a temporary folder and uncompress the ZIP file. 2) Install the EV kit software on your computer by launching the 5488Rxx.MSI program inside the zip file. The program files are copied and icons are created in the Windows Start | Programs menu. Table 1. JU1 Jumper Functions SIGNAL SHUNT POSITION VDD EV KIT FUNCTION 1-2* Power device V+ from USB 5V supply Open Do not use—device will not be powered 2-3 Power device V+ from userprovided supply 3) Ensure that the MAX5488 EV kit board’s jumper settings are correct (see Table 1 for jumper settings). 4) Unlatch the socket and use tweezers to install one of the MAX5488 devices, exposed pad down. Note the location of pin 1 in the upper-right corner, as indicated on the PCB silkscreen. On the device, the pin 1 index is marked with a molded or marked feature, typically # or + for RoHS-compliant devices. After ensuring that the device is properly seated, latch the socket lid securely closed. 5) Connect one of the ohmmeters across the WA and LA terminals. 6) Connect the other ohmmeter across the WB and LB terminals. 7) Connect the USB cable from the PC to the MINIQUSB board. A Building Driver Database window pops up in addition to a New Hardware Found message when installing the USB driver for the first time. If you do not see a window that is similar to the one described above after 30s, remove the USB cable from the board and reconnect it. Administrator privileges are required to install the USB device driver on Windows 2000 and XP. Refer to Application Note 3601: Troubleshooting Windows Plug-and-Play and USB for Maxim Evaluation Kits if you have any problems during this step. 8) Follow the directions of the Add New Hardware Wizard to install the USB device driver. Choose the Search for the best driver for your device option. Specify the location of the device driver to be C:\Program Files\Maxim MAX5488EVKIT (default installation directory) using the Browse button. During device driver installation, Windows XP shows a warning message indicating that the device driver Maxim uses does not contain a digital signature. This is not an error condition. It is safe to proceed with the installation. 9) Start the EV kit software by clicking its icon in the Windows Start menu. 10) The software automatically searches for the MAX5488. After successful connection, the EV kit firmware banner appears in the lower-left corner of the window. Move the Channel A or Channel B slider and click the Write button to set the wiper position, as shown in Figure 1. *Default position. _______________________________________________________________________________________ 3 Evaluates: MAX5487/MAX5488/MAX5489 Quick Start Evaluates: MAX5487/MAX5488/MAX5489 MAX5488 Evaluation Kit Detailed Description of Software The MAX5488 EV kit software graphical user interface (GUI) is a Windows program that provides a convenient means to control the MAX5488 (Figure 1). In the Channel B group box, set the tap value (either by typing the decimal tap number into one of the edit boxes or by moving the slider), and then click the Write button. As confirmation, the Command History window shows SPI sequence 0x02 nn, where nn = the hexadecimal W-L tap value. Figure 1. MAX5488 EV Kit Main Window Factory Reset Clicking the Factory Reset button returns wiper A and wiper B (and the nonvolatile memory) to the factoryprogrammed midscale tap position. Wipers A and B Position In the Channel A group box, set the tap value (either by typing the decimal tap number into one of the edit boxes or by moving the slider), and then click the Write button. As confirmation, the Command History window shows SPI sequence 0x01 nn, where nn = the hexadecimal W-L tap value. 4 Nonvolatile Programming In the Channel A group box, set the tap value (either by typing the decimal tap number into one of the edit boxes or by moving the slider), and then click the Write NV button. As confirmation, the Command History window shows SPI sequence 0x11 nn, where nn = the hexadecimal W-L tap value. In the Channel B group box, set the tap value (either by typing the decimal tap number into one of the edit boxes or by moving the slider), and then click the Write NV button. As confirmation, the Command History window shows SPI sequence 0x12 nn, where nn = the hexadecimal W-L tap value. _______________________________________________________________________________________ MAX5488 Evaluation Kit 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. Detailed Description of Hardware Evaluating the MAX5487 or MAX5489 The MAX5487 and MAX5489 are similar to the MAX5488, but with a different end-to-end resistance. To evaluate the MAX5487 or MAX5489, order a free sample of the MAX5487ETE#G16 (refer to the MAX5487/MAX5488/MAX5489 IC data sheet). External User-Supplied SPI Interface In the Channel B group box, copy the active tap value to nonvolatile memory by clicking the Load NV ➔ active button. As confirmation, the Command History window shows SPI sequence 0x32. To copy both of the active tap values to nonvolatile memory, click the Copy Both NV Registers to Wiper Registers button. As confirmation, the Command History window shows SPI sequence 0x33. The EV kit may be modified for use with an external, user-supplied SPI interface. First, with power off and USB disconnected, flip the board over and cut the traces that are on the back of the board, underneath location J2. Install a standard dual-row header, and connect a ribbon cable to the user-supplied SPI. Keyboard Navigation The EV kit may be used with an external, user-supplied 2.7V to 5.25V power supply. First, with power off and USB disconnected, move the JU1 shunt between pins 2-3. When you type on the keyboard, the system must know which control should receive the keys. Press the TAB Using an External Power Supply _______________________________________________________________________________________ 5 Evaluates: MAX5487/MAX5488/MAX5489 Volatile/Nonvolatile Data Transfer In the Channel A group box, copy the active tap value to nonvolatile memory by clicking the Save active ➔ NV button. As confirmation, the Command History window shows SPI sequence 0x21. In the Channel B group box, copy the active tap value to nonvolatile memory by clicking the Save active ➔ NV button. As confirmation, the Command History window shows SPI sequence 0x22. To copy both of the active tap values to nonvolatile memory, click the Copy Both Wiper Registers to NV Registers button. As confirmation, the Command History window shows SPI sequence 0x23. In the Channel A group box, copy the active tap value to nonvolatile memory by clicking the Load NV➔active button. As confirmation, the Command History window shows SPI sequence 0x31. LB HB H1 1 x 4 HEADER WB Evaluates: MAX5487/MAX5488/MAX5489 MAX5488 Evaluation Kit HA H1-1 WA HA LA WA H1-2 12 H1-3 LA H1-4 WA 13 HB 11 10 WB 15 HA H2 1 x 4 HEADER I.C. U1 WA 1 HB GND MAX5488SOCKET (16QN50K23030) HA N.C. I.C. VDD H2-1 WB 16 USB +5V HB N.C. LA LA 14 9 LB N.C. VDD 1 JU1 SCLK 2 DIN 3 8 VDD 7 R7 470Ω 6 D1 5 CS 4 DGND 2 H2-2 3 VDD LB C1 0.1μF GND H2-4 VDDIO R8 0Ω DUT_SCLK H2-3 C2 OPEN DUT_CS WB DUT_MOSI LB R9 OPEN R10 OPEN VDD J2 1 MAXQ_MISO MAXQ_SCLK MAXQ_MOSI MAXQ_CS 2 3 4 5 6 7 VL VCC OVL1 IVL2 IVL3 IVL4 N.C. GND IVCC1 U2 OVCC2 MAX3390 OVCC3 OVCC4 N.C. THREE-STATE 14 13 12 11 10 9 VDDIO J2-1 J2-2 J2-3 J2-4 J2-5 J2-6 J2-7 J2-8 J2-9 J2-10 J2-11 J2-12 R11 OPEN DUT_SCLK DUT_MOSI DUT_CS 6 Figure 2a. MAX5488 EV Kit Schematic (Sheet 1 of 3) 6 _______________________________________________________________________________________ MAX5488 Evaluation Kit VDDIO USB +5V L6 70Ω USB +2.5V 1 J1-1 C37 0.1μF C38 10μF DGND DGND C39 1μF IN U7 OUT MAX8511 3 SHDN GND R26 0Ω 5 2 C40 10μF VDDIO 6 R1 27Ω DGND 8 J1-2 C6 0.1μF DGND DGND C4 0.033μF DGND R4 470Ω C5 0.1μF 30 3 AVCC VCC C7 0.1μF C8 0.1μF DGND 26 DGND 13 VCC 3V3OUT VCCIO TXD RXD USBDM RTS R2 27Ω 7 J1-3 CTS USBDP DTR USB +5V R3 1.5kΩ C30 22pF J1-4 DGND DSR 5 RSTOUT 4 RESET 27 XTIN USB +5V 8 6 VCC CS 1 DGND RI Y4 6MHz TXDEN 28 DGND DCD U5 FT232BL C31 22pF 32 2 U6 SK AT93C46A 3 N.C. D1 5 4 GND D0 1 ORG XTOUT TXLED RXLED EECS EESK PWRCTL 25 TXD 24 RXD 23 RTS 22 CTS 21 DTR 20 DSR 19 DCD 18 RI 16 12 11 14 7 C9 0.1μF DGND DGND R5 2.2kΩ R6 10kΩ 2 USB +5V 31 DGND PWREN EEDATA SLEEP TEST AGND 29 GND 9 GND 17 DGND DGND DGND 15 10 Figure 2b. MAX5488 EV Kit Schematic (Sheet 2 of 3) _______________________________________________________________________________________ 7 Evaluates: MAX5487/MAX5488/MAX5489 USB +5V Y3 32.768kHz RTS DTR MAXQ_CS DGND MAXQ_MOSI C16 10pF Y2 20MHz CTS C15 10pF C17 0.1μF MAXQ_MISO VDDIO MAXQ_SCLK Evaluates: MAX5487/MAX5488/MAX5489 MAX5488 Evaluation Kit 2 32KOUT 32KIN P5.2/RX1/INT10 P5.3/TX1/INT11 P5.4/SS P5.5/MOSI P5.6/SCLK P5.7/MISO P6.1/T1/INT13 P6.0/T1B/INT12 P6.3/T2/OW_IN P6.2/T2B/OW_OUT P6.4/T0B/WKOUT0 P6.5/T0/WKOUT1 SEG32 SEG7/P0.7/INT3 SEG31/P3.7/INT7 SEG8/P1.0 SEG30/P3.6/INT6 SEG9/P1.1 SEG29/P3.5/INT5 SEG10/P1.2 SEG28/P3.4/INT4 49 1 2 3 4 5 6 7 8 9 +2.5V GND SEG6/P0.6/INT2 GND SEG33/COM3 SEG27/P3.3 SEG5/P0.5/INT1 VDD 68 SEG34/COM2 SEG26/P3.2 67 SEG4/P0.4/INT0 SEG25/P3.1 66 SEG35/COM1 SEG24/P3.0 65 COMO MAXQ2000-RAX SEG3/P0.3 SEG23/P2.7 64 SEG2/P0.2 SEG22/P2.6 63 33 32 TDO 31 TMS 30 TDI 29 TCK U4 SEG1/P0.1 SEG21/P2.5 62 MAXQ_RESET J3-6 J3-4 J3-3 J3-7 J3-5 J3-8 J3-9 J3-2 J3-1 J3-10 R12 SHORT (PC TRACE) 26 25 24 VDDIO R13 SHORT (PC TRACE) 23 22 21 RI TDO R14 SHORT (PC TRACE) 20 19 18 DGND DTR MAXQ_RESET RTS TMS R15 SHORT (PC TRACE) DCD TDI 10 11 12 13 14 15 16 17 28 42 R16 SHORT (PC TRACE) C18 0.1μF DGND TCK DGND Figure 2c. MAX5488 EV Kit Schematic (Sheet 3 of 3) 8 J3 JTAG SEG0/P0.0 SEG20/P2.4 61 P4.0/TCK/INT8 VADJ SEG19/P2.3 60 P4.1/TDI/INT9 VLCD2 SEG18/P2.2 59 P4.2/TMS VLCD1 SEG17/P2.1 58 RESET P4.3/TDO SEG16/P2.0 57 35 VLCD SEG15/P1.7 56 P7.1/RXO/INT15 SEG14/P1.6 55 P7.0/TXO/INT14 SEG13/P1.5 54 HFXOUT VDDIO 53 SEG12/P1.4 TXD 52 48 47 46 45 44 43 41 40 39 38 37 36 34 SEG11/P1.3 RXD 50 51 HFXIN 27 DGND 1 _______________________________________________________________________________________ DSR MAX5488 Evaluation Kit Evaluates: MAX5487/MAX5488/MAX5489 Figure 3. MAX5488 EV Kit Component Placement Guide—Component Side _______________________________________________________________________________________ 9 Evaluates: MAX5487/MAX5488/MAX5489 MAX5488 Evaluation Kit Figure 4. MAX5488 EV Kit PCB Layout—Component Side 10 ______________________________________________________________________________________ MAX5488 Evaluation Kit Evaluates: MAX5487/MAX5488/MAX5489 Figure 5. MAX5488 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 and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.