MAX5138EVKIT+

19-4491; Rev 0; 2/09 MAX5138 Evaluation Kit The MAX5138 evaluation kit (EV kit) provides a proven design to evaluate the MAX5138 16-bit, low-power, digital-to-analog converter (DAC). The EV kit also includes Windows® 2000/XP- and Windows Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the MAX5138. The MAX5138 EV kit PCB comes with a MAX5138BGTE+ installed. Contact the factory for free samples of the pincompatible MAX5139GTE+ to evaluate this device. Ordering Information PART TYPE MAX5138EVKIT+ EV Kit Features o Windows 2000/XP- and Windows Vista (32-Bit)-Compatible Software o Supports Standard SPI™ Interface o USB-PC Connection (Cable Included) o USB Powered o 8-Pin DAC Output Signal Header o Proven PCB Layout o Lead(Pb)-Free and RoHS Compliant o Fully Assembled and Tested +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY C1, C3–C10, C17, C21, C23 12 DESCRIPTION 0.1µF ±10%, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104K DESIGNATION QTY DESCRIPTION H2 1 Dual-row (2 x 4) 8-pin header H3 1 Dual-row (2 x 6) 12-pin header JUA–JUE 0 Not installed, 2-pin headers JU1–JU5, JU7, JU8, JU9 8 3-pin headers 5 10µF ±20%, 6.3V X5R ceramic capacitors (0805) TDK C2012X5R0J106M JU6 1 5-pin header C11, C12 2 10pF ±5%, 50V C0G ceramic capacitors (0603) TDK C1608C0G1H100J P1 1 USB type-B right-angle female receptacle 2 0Ω ±5% resistors (0603) 2 1µF ±20%, 6.3V X5R ceramic capacitors (0603) TDK C1608X5R0J105M R1, R8 C14, C16 R2 1 220Ω ±5% resistor (0603) R3 1 10kΩ ±5% resistor (0603) 2 22pF ±5%, 50V C0G ceramic capacitors (0603) TDK C1608C0G1H220J R4 1 2.2kΩ ±5% resistor (0603) R5 1 1.5kΩ ±5% resistor (0603) 3300pF ±10%, 50V X7R ceramic capacitor (0603) TDK C1608X7R1H332K R6, R7 2 27Ω ±5% resistors (0603) R16 0 Not installed, resistor (0402) U1 1 Single 16-bit low-power DAC (16 TQFN-EP*) Maxim MAX5138BGTE+ U2 1 Low-power microcontroller (68QFN-EP*) Maxim MAXQ2000-RAX+ U3 1 93C46 type 3-wire EEPROM (8 SO) 16-bit architecture U4 1 UART-to-USB converter (32 TQFP) C2, C13, C15, C22, C24 C18, C19 C20 1 C25 0 Not installed, ceramic capacitor (0603) C26 1 39pF ±5%, 50V C0G ceramic capacitor (0402) Murata GRM1555C1H390G D1 1 Green LED (0603) FB1 1 0Ω ±5% resistor (0603) H1 0 Not installed, 10-pin JTAG header *EP = Exposed pad. Windows and Windows Vista are registered trademarks of Microsoft Corp. SPI is a trademark of Motorola, Inc. ________________________________________________________________ Maxim Integrated Products 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. 1 Evaluates: MAX5138/MAX5139 General Description Evaluates: MAX5138/MAX5139 MAX5138 Evaluation Kit Component List (continued) DESIGNATION QTY U5 1 3.3V regulator (5 SC70) Maxim MAX8511EXK33+T (Top Mark: AEI) U6 1 2.5V regulator (5 SC70) Maxim MAX8511EXK25+T (Top Mark: ADV) Y1 DESIGNATION QTY DESCRIPTION DESCRIPTION Y2 1 6MHz crystal (HCM49) Hong Kong X’tals SSL6000000E18FAF — 9 Shunts (JU1–JU9) — 1 USB high-speed A-to-B cable — 1 PCB: MAX5138 Evaluation Kit+ 16MHz crystal (HCM49) Hong Kong X’tals SSM1600000E18FAF 1 Component Suppliers SUPPLIER PHONE WEBSITE Hong Kong X’tals Ltd. 852-35112388 www.hongkongcrystal.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX5138 when contacting these component suppliers. MAX5138 EV Kit Files FILE DESCRIPTION INSTALL.EXE Installs the EV kit files on your computer MAX5138.EXE Application program FTD2XX.INF USB device driver file UNINST.INI Uninstalls the EV kit software USB_Driver_Help.PDF USB driver installation help file Quick Start Required Equipment • MAX5138 EV kit (USB cable included) • A user-supplied Windows 2000/XP- or Windows Vista-compatible PC with a spare USB port • One digital voltmeter (DVM) • USB powered (use optional external power supply for enhanced performance) 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 operating system. 2 Procedure 1) Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 5138Rxx.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 running the INSTALL.EXE program inside the temporary folder. The program files are copied and icons are created in the Windows Start | Programs menu. 3) Verify that all jumpers (JU1–JU9) are in their default positions, as shown in Table 1. _______________________________________________________________________________________ MAX5138 Evaluation Kit driver installation, Windows may show a warning message indicating that the device driver Maxim uses does not contain a digital signature. This is not an error condition and it is safe to proceed with installation. Refer to the USB_Driver_Help.PDF document included with the software for additional information. 6) Start the MAX5138 EV kit software by opening its icon in the Start | Programs menu. 5) 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\MAX5138 (default installation directory) using the Browse button. During device 7) When the Power Up State Of DAC Output window appears, verify that the shunt on jumper JU6 is in the proper location on the board and press the corresponding radio button. The MAX5138 EV kit software main window appears next, as shown in Figure 1. Table 1. MAX5138 EV Kit Jumper Descriptions (JU1–JU9) JUMPER SHUNT POSITION JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JU9 DESCRIPTION 1-2* MAX5138 CS signal connected to on-board microcontroller 2-3 MAX5138 CS signal connected to H3-1 of on-board header H3 1-2* MAX5138 SCLK signal connected to on-board microcontroller 2-3 MAX5138 SCLK signal connected to H3-3 of on-board header H3 1-2* MAX5138 DIN signal connected to on-board microcontroller 2-3 MAX5138 DIN signal connected to H3-5 of on-board header H3 1-2 Factory Use Only. The MAX5138 EV kit software and MAXQ2000 microcontroller do not read the MAX5138 READY signal. 2-3* MAX5138 READY signal connected to H3-7 of on-board header H3 1-2* MAX5138 LDAC signal connected to on-board microcontroller 2-3 MAX5138 LDAC signal connected to H3-9 of on-board header H3 1-2 Factory Use Only. The MAX5138 EV kit software and MAXQ2000 microcontroller do not drive the MAX5138 M/Z signal. 1-3 MAX5138 M/Z signal connected to GND. DAC outputs are set to 0V after power-up or power-on reset (POR). 1-4 MAX5138 M/Z signal connected to H3-11 of on-board header H3 1-5* MAX5138 M/Z signal connected to AVDD. DAC outputs are set to midscale after power-up or power-on reset (POR). 1-2* DVDD connected to on-board regulated +3.3V supply 2-3 Connect an external 2.7V to 3.6V supply to the DVDD pad. The on-board microcontroller must be disconnected before connecting an external supply to DVDD greater than 3.6V. See the User-Supplied Power Supplies section for more information. 1-2* AVDD connected to on-board regulated +3.3V supply 2-3 Connect an external 2.7V to 5.25V supply to the AVDD pad 1-2* REFIN is connected to the internal 2.440V reference. REFIN is connected to REFOUT. 2-3 The MAX5138 reference is equal to AVDD Open Connect an external reference voltage to REFIN in the 2V to AVDD range. *Default position. _______________________________________________________________________________________ 3 Evaluates: MAX5138/MAX5139 4) Connect the USB cable from the PC to the EV kit board. A New Hardware Found window pops up when installing the USB driver for the first time. If a window is not seen 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. Evaluates: MAX5138/MAX5139 MAX5138 Evaluation Kit Figure 1. MAX5138 EV Kit Software Main Window (Load DAC Tab) 8) To measure the OUT voltage, connect the DVM between H2-1 (OUT) and H2-2 (GND). 9) Verify that the voltage on the DVM is approximately 1.22V. 10) Enter 0x68EB into the D15 - D0 (Shift Register Data Bits) edit box. 11) In the Shift Register to Input Register group box, press the Load DAC button. 12) Verify that the voltage shown on the DVM is approximately 1V. Detailed Description of Software The main window of the evaluation software (Figure 1) displays the voltage and code for the DAC input and output registers. In addition, the main window has two tabs. The Load DAC tab sheet controls all the DAC loading features of the MAX5138. The Operating 4 Modes tab sheet (Figure 2) controls all the DAC modes of the MAX5138. The Load Setting(s) button must be pressed in order to write the corresponding mode settings to the DAC. Software Reset Press the Reset All Registers button to reset the MAX5138’s registers and GUI to the power-on-reset (POR) state. This can be done at any time and is highly recommended after the advanced user interface is used. Advanced User Interface A manual serial interface can be used by advanced users by selecting Options | Interface (Advanced Users) from the menu bar. For SPI, click on the 3-wire interface tab shown in Figure 3. Enter data into the Data bytes to be written edit box and press the Send Now button. _______________________________________________________________________________________ MAX5138 Evaluation Kit Evaluates: MAX5138/MAX5139 Figure 2. MAX5138 EV Kit Software Main Window (Operating Modes Tab) Detailed Description of Hardware The MAX5138 EV kit provides a proven layout for the MAX5138. An on-board analog output signal header (H2), on-board digital input/output signal header (H3), and jumpers to disconnect the on-board microcontroller are all included on the EV kit. Reference At power-up, the MAX5138 EV kit defaults to using the internal 2.440V reference. To use AVDD as the reference, place the shunt on jumper JU9 in the 2-3 position. For off-board external references, connect a user-supplied reference voltage to REFIN and remove the shunt on jumper JU9. Type in the reference voltage value in the Set Vref edit box and press the Set Vref button. The MAX5138 EV kit software uses the value in the Set Vref edit box to calculate the input and output register voltage values and does not affect any commands to the part. User-Supplied SPI Interface To use the MAX5138 EV kit with a user-supplied SPI interface, first move the shunts of jumpers JU1–JU5 and JU7 to the 2-3 position. Then apply an external 2.7V to 5.25V power supply to DVDD. Lastly, connect CS, SCLK, DIN, and GND signals to the corresponding pins of header H3. User-Supplied Power Supplies The MAX5138 EV kit is powered completely from the USB port by default. Before connecting a user-supplied power supply greater than 3.6V on DVDD, the on-board microcontroller must be disconnected. First, move the shunts of jumpers JU1–JU5, JU7, and JU8 to the 2-3 position. Then, apply an external 2.7V to 5.25V power supply to the corresponding DVDD and AVDD pads. For optimum performance, use separate supplies. Lastly, see the User-Supplied SPI Interface section for interface connections, if applicable. _______________________________________________________________________________________ 5 Evaluates: MAX5138/MAX5139 MAX5138 Evaluation Kit Figure 3. Advanced SPI User Interface Window (3-Wire Interface Tab) 6 _______________________________________________________________________________________ MAX5138 Evaluation Kit Evaluates: MAX5138/MAX5139 Figure 4a. MAX5138 EV Kit Schematic (Sheet 1 of 2) _______________________________________________________________________________________ 7 Evaluates: MAX5138/MAX5139 MAX5138 Evaluation Kit Figure 4b. MAX5138 EV Kit Schematic (Sheet 2 of 2) 8 _______________________________________________________________________________________ MAX5138 Evaluation Kit Evaluates: MAX5138/MAX5139 Figure 5. MAX5138 EV Kit Component Placement Guide—Component Side _______________________________________________________________________________________ 9 Evaluates: MAX5138/MAX5139 MAX5138 Evaluation Kit Figure 6. MAX5138 EV Kit PCB Layout—Component Side 10 ______________________________________________________________________________________ MAX5138 Evaluation Kit Evaluates: MAX5138/MAX5139 Figure 7. MAX5138 EV Kit PCB Layout—Inner Layer 2 (GND) ______________________________________________________________________________________ 11 Evaluates: MAX5138/MAX5139 MAX5138 Evaluation Kit Figure 8. MAX5138 EV Kit PCB Layout—Inner Layer 3 (VDD) 12 ______________________________________________________________________________________ MAX5138 Evaluation Kit Evaluates: MAX5138/MAX5139 Figure 9. MAX5138 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 ____________________ 13 © 2009 Maxim Integrated Products SPRINGER Maxim is a registered trademark of Maxim Integrated Products, Inc.