MAX5581EVKIT

19-3719; Rev 0; 6/05 MAX5581 Evaluation Kit/Evaluation System The MAX5581 evaluation system (EV system) is a complete, 4-channel, 12-bit, data-generation system. The MAX5581 EV system (MAX5581EVCMODU) consists of a MAX5581 evaluation kit (EV kit) and the Maxim CMODUSB command module. Order the EV kit (MAX5581EVKIT) separately if an SPI™ master or the CMODUSB command module is already available. Features ♦ Proven PC Board Layout ♦ Windows® 98-/2000-/XP-Compatible Evaluation Software ♦ Pushbutton Switches for Easy UPIO_ Evaluation ♦ Fully Assembled and Tested The EV kit comes with the MAX5581AETP installed. Contact the factory for free samples of the pin-compatible MAX5580_ETP–MAX5585ETP to evaluate these devices. Ordering Information Component List DESIGNATION QTY PART DESCRIPTION 10µF ±20%, 6.3V X5R ceramic capacitors (0805) TDK C2012X5R0J106M 0.1µF ±10%, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104KT C1, C4 2 C2, C3, C5, C6, C7 5 FB1 1 Surface-mount ferrite bead (0603) TDK MMZ1608B601C J1 1 2 x 20 right-angle female connector J2 1 10-pin, 2 x 5 header JU1, JU2, JU6 3 3-pin headers JU3, JU4, JU5 0 Not installed (2-pin headers) R1–R8 8 10kΩ ±0.1% resistors (0805) R9–R16 0 Not installed (thru-hole resistors) R17, R19 2 100kΩ ±5% resistors (0805) R18, R20 2 1kΩ ±5% resistors (0805) R21 1 10kΩ ±5% resistor (0805) SW1, SW2 2 Pushbutton switches, momentary, normally open U1 1 MAX5581AETP (20-pin thin QFN-EP) U2 1 +2.5V voltage reference (8-pin SO) Maxim MAX6126AASA25 None 3 Shunts None 1 MAX5581 EV kit blank PC board None 1 MAX5581 EV kit software CD SPI is a trademark of Motorola, Inc. INTERFACE TYPE User-supplied SPI master MAX5581EVKIT Windows software MAX5581EVCMODU Note: The MAX5581 software is included with the MAX5581 EV kit but is designed for use with the complete EV system. The EV system includes both the Maxim command module and the EV kit. If the Windows software will not be used, the EV kit board can be purchased without the Maxim command module. Note: To evaluate the MAX5580_ETP–MAX5585ETP, request a free sample when ordering the MAX5581 EV kit. MAX5581EVCMODU Component List PART QTY DESCRIPTION MAX5581EVKIT 1 MAX5581 EV kit CMODUSB 1 CMODUSB command module Component Supplier SUPPLIER TDK PHONE 847-803-6100 WEBSITE www.component.tdk.com Note: Indicate you are using the MAX5581 when contacting this component supplier. MAX5581EV Kit Files INSTALL.EXE Installs the EV kit files on your computer MAX5581.EXE Application program HELPFILE.HTM MAX5581 EV kit help file FTD2XX.INF USB driver file UNINST.INI Uninstalls the EV kit software Windows is a registered trademark of Microsoft Corporation. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluate: MAX5580–MAX5585 General Description Evaluate: MAX5580–MAX5585 MAX5581 Evaluation Kit/Evaluation System Quick Start Recommended Equipment • MAX5581EVCMODU EV system (MAX5581EVKIT and CMODUSB command module with USB cable included) • Power supply: 5V at 100mA (AVDD) • Digital voltmeter (DVM) • A user-supplied Windows 98/2000/XP PC with an available USB port Procedure Do not turn on the power until all connections are made. 1) Verify jumper J1 on the CMODUSB module is connected to pins 1-2. This sets the logic supply to 5V. 2) Verify that JU1 on the MAX5581 EV kit is set to 2-3 (DAC outputs are set to zero on power-up). 3) Verify that JU2 on the MAX5581 EV kit is set to 2-3 (UPIO1 connected to SPI MISO (DOUT) line). 4) Verify that JU6 on the MAX5581 EV kit is set to 1-2 (SPI data is clocked in on the rising edge of SCLK). 5) Connect the MAX5581 EV kit’s 40-pin female connector (J1) to the CMODUSB module’s 40-pin male connector (P4). 6) Install the MAX5581 evaluation software on your computer by running the INSTALL.EXE program on the installation CD-ROM. The program files are copied and icons are created for them in the Windows Start menu. 7) Connect the 5V power supply between the MAX5581 EV kit’s AVDD and AGND pads. Turn on the 5V power supply. 2 8) Connect the included USB cable from the PC to the CMODUSB command module. A Building Driver Database window will pop up in addition to a New Hardware Found message. If you do not see any window that is similar to the one described above after 30s, try removing the USB cable from the CMODUSB command module and reconnect it again. Administrator privileges are required to install the USB device driver on Windows 2000/XP. 9) 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:\Max5581 using the Browse button. 10) Start the MAX5581 EV kit software by opening its icon in the Start menu. 11) Using the Load Input and Output (From Shift) Tab, press the Load All DACs button. 12) Verify that all Output Register Code and Voltage labels update with 0x800 and 1.25V, respectively, at the bottom of the MAX5581 EV kit software’s main window. 13) Measure the voltage at OUTA (J2-1) using the DVM and verify that the voltage is approximately 1.25V. Detailed Description of Software The evaluation software’s main window, shown in Figure 1, displays the voltage and code for all DAC input and output registers. In addition, the main window also shows the shutdown and settling time status for all of the DACs. Table 1 describes the controls that are always present on the evaluation software’s main window. _______________________________________________________________________________________ MAX5581 Evaluation Kit/Evaluation System Evaluate: MAX5580–MAX5585 Figure 1. MAX5581 Evaluation Software—Main Window _______________________________________________________________________________________ 3 Evaluate: MAX5580–MAX5585 MAX5581 Evaluation Kit/Evaluation System Table 1. MAX5581 EV Kit Software—Main Window Control Descriptions CONTROL DESCRIPTION Allows the user to select the active tab. Shows the CMODUSB debugging tools. Gives access to the help file and the about box. Shows the code and voltage for the input register of DAC A–DAC D. Shows the code and voltage for the output register of DAC A–DAC D. Shows the shutdown mode and shutdown status of DAC A–DAC D. Shows the settling time mode of DAC A–DAC D. When checked, automatically reads and updates all the register information for the registers that are permanently on the bottom of the software’s main window. A flashing asterisk indicates AutoRead All Registers is active. Allows the user to enter the actual measured on-board reference value or the actual value of a usersupplied external reference. Pressing the Set Vref button uses the value typed in the edit to calculate the corresponding input and output register voltages. Allows the user to enter the gain of the output amplifier. Pressing the Set Gain button uses the value typed in the edit box to calculate the corresponding input and output register voltages. The MAX5581 EV kit board has on-board resistors that set the default gain to 2. To change the gain, modify the onboard gain-setting resistors by referring to the MAX5581 data sheet before changing the gain in the software. For unity-gain device evaluation, set the gain to 1 and remove the output feedback resistors to prevent loading the output. Resets all the registers and status information that is permanently on the bottom of the software’s main window as shown in Figure 1. 4 _______________________________________________________________________________________ MAX5581 Evaluation Kit/Evaluation System The Load Input (From Shift) tab, shown in Figure 2, allows the user to load the input register of the corresponding DAC with the data that is sent to the shift register. The user can load all four DACs individually or all at once by pressing the appropriate button. If the AutoRead All Registers checkbox is checked (see Figure 1), the new input register value is updated to the software’s main window. The Load Output (From Shift) tab, shown in Figure 3, allows the user to load the output register of the corresponding DAC with the data that is sent to the shift register. The user can load all four DACs individually by pressing the appropriate button. If the AutoRead All Registers checkbox is checked (see Figure 1), the new output register value is updated to the software’s main window. Figure 3. Load Output (From Shift) Tab _______________________________________________________________________________________ 5 Evaluate: MAX5580–MAX5585 Figure 2. Load Input (From Shift) Tab Evaluate: MAX5580–MAX5585 MAX5581 Evaluation Kit/Evaluation System The Load Input and Output (From Shift) tab, shown in Figure 4, allows the user to load the input and output registers of the corresponding DAC with the data that is sent to the shift register. The user can load all four DACs individually or all at once by pressing the appropriate button. If the AutoRead All Registers checkbox is checked (see Figure 1), the new input and output register values are updated to the software’s main window. Figure 4. Load Input and Output (From Shift) Tab 6 _______________________________________________________________________________________ MAX5581 Evaluation Kit/Evaluation System Load Checked DACs button. It is also possible to load all of the DACs at once by pressing the Load All DACs button. If the AutoRead All Registers checkbox is checked (see Figure 1), the new output register values are updated to the software’s main window. Figure 5. Load Output (From Input) Tab _______________________________________________________________________________________ 7 Evaluate: MAX5580–MAX5585 The Load Output (From Input) tab, shown in Figure 5, allows the user to load the output register of the corresponding DAC with the data that is present in the corresponding input register. The user can load the four DACs simultaneously in any combination by checking the appropriate DAC_ checkbox and then pressing the Evaluate: MAX5580–MAX5585 MAX5581 Evaluation Kit/Evaluation System The Shutdown Modes tab, shown in Figure 6, allows the user to select the appropriate DAC shutdown mode individually for all four DACs. The selected shutdown modes are not loaded until the Load DAC A-D Shutdown Modes button is pressed. If the AutoRead All Registers checkbox is checked (see Figure 1), the new shutdown mode status for each DAC is updated to the software’s main window. Figure 6. Shutdown Modes Tab 8 _______________________________________________________________________________________ MAX5581 Evaluation Kit/Evaluation System Note: For the MAX5581 EV kit software to read from the MAX5581 device, UPIO1 must be configured for DOUTRB. Figure 7. UPIO Functions Tab _______________________________________________________________________________________ 9 Evaluate: MAX5580–MAX5585 The UPIO Functions tab, shown in Figure 7, allows the user to select the appropriate UPIO1 and UPIO2 functions using the corresponding combobox. The current UPIO1 and UPIO2 function status is displayed by pressing the Read button. Evaluate: MAX5580–MAX5585 MAX5581 Evaluation Kit/Evaluation System The Settling Time Modes tab, shown in Figure 8, allows the user to select the appropriate DAC settling time mode individually for all four DACs. The selected settling time modes are not loaded until the Load DAC A-D Settling Time Modes button is pressed. If the AutoRead All Registers checkbox is checked (see Figure 1), the new settling time modes for each DAC are updated to the software’s main window. Figure 8. Settling Time Modes Tab 10 ______________________________________________________________________________________ MAX5581 Evaluation Kit/Evaluation System Note: This read requires that UPIO1 be configured for DOUTRB and UPIO2 be configured as a GPI. Figure 9. Read GPI Tab Detailed Description of Hardware MAX5581 EV System The MAX5581 EV system is a complete, 4-channel, 12bit, data-generation system consisting of a MAX5581 EV kit and the Maxim CMODUSB command module. CMODUSB Command Module The CMODUSB uses a proprietary design to provide SPI- and I2C-compatible interfaces to demonstrate various Maxim devices. Maxim reserves the right to change the implementation of this module at any time with no advance notice. Table 2. CMODUSB Jumper J1 (System Supply Voltage) JUMPER SHUNT POSITION SYSTEM SUPPLY VOLTAGE (DVDD) 1-2 5V 2-3 3.3V J1 Open DO NOT OPERATE KIT WITH J1 OPEN. PERMANENT DAMAGE WILL RESULT. CMODUSB Power Supply The CMODUSB board uses a MAX1658 linear voltage regulator. Jumper J1 selects between a 5V or 3.3V system supply voltage. Do not plug a wall cube into the P1 power jack since power is provided from the USB port. ______________________________________________________________________________________ 11 Evaluate: MAX5580–MAX5585 The Read UPIO Inputs tab, shown in Figure 9, allows the user to read the GPI status for UPIO2. Pressing the Read button not only tells the user whether a falling edge or rising edge has occurred since the last read, but also the current state of the pin. Evaluate: MAX5580–MAX5585 MAX5581 Evaluation Kit/Evaluation System MAX5581 EV Kit The MAX5581 EV kit board provides a proven layout for evaluating the MAX5581 4-channel, 12-bit DAC and can be obtained separately without the CMODUSB command module. The MAX5581 EV kit contains an onboard reference and two momentary pushbutton switches for testing the UPIO functions. The MAX5581AETP (U1) is powered from two sources. The user must supply +5V to AVDD. DVDD is provided by the CMODUSB command module. The DAC outputs can be set to full scale, midscale, or zero at power-up. Jumper JU1 configures the DAC outputs at power-up as shown in Table 3. Jumper JU2 gives the user the flexibility to connect UPIO1 to the CMODUSB command module’s SPI MISO line (DOUT) or to a UPIO1 user pad on the MAX5581 EV kit board. Table 4 shows the UPIO1 route selection. Table 3. Power-Up State Select Input (PU) JUMPER SHUNT POSITION 1-2 JU1 2-3* Open DESCRIPTION DAC outputs set to full scale upon power-up. DAC outputs set to zero upon power-up. DAC outputs set to midscale upon power-up. The MAX5581 EV kit has an on-board MAX6126 +2.5V reference, but also allows for a user-supplied external reference (0.25V to AVDD). Cut the PC board trace designated by jumper JU3 and apply an external reference to the REF pad. Table 5 shows the jumper JU3 reference type options. Measure the supply current using jumpers JU4 and JU5. Cut the PC board traces and place a current meter in series with the two terminals of the corresponding jumper. Table 6 shows the jumper JU4/JU5 current measurement options. Jumper JU6 allows the user to select the clock edge that latches-in the SPI data. Table 7 shows the jumper JU6 clock edge options. Table 6. Supply Current Measurement (IAVDD/IDVDD) JUMPER JU4/JU5 PC BOARD TRACE Short* Open *Default configuration. Table 4. UPIO1 Route Selection (DOUT/UPIO1) JUMPER JU2 SHUNT POSITION 1-2 2-3* DESCRIPTION UPIO1 user pad. CMODUSB’s SPI MISO line (DOUT). Required for readback commands in MAX5581 EV kit software. DESCRIPTION Normal operation. Cut the trace and attach a current meter in series with the two open terminals to measure the supply current of AVDD (JU4) and DVDD (JU5). *Default configuration. Table 7. Data Latch-In Clock Edge Select (DSP) JUMPER SHUNT POSITION 1-2* JU6 2-3 *Default configuration. DESCRIPTION Data latched in on the rising edge of SCLK. Data latched in on the falling edge of SCLK. *Default configuration. Table 5. Reference Selection (REF) JUMPER PC BOARD TRACE Short* JU3 Open DESCRIPTION On-board MAX6126 +2.5V reference option. Cut the trace and attach an external reference to the REF pad. *Default configuration. 12 ______________________________________________________________________________________ MAX5581 Evaluation Kit/Evaluation System Problem 1: CMODUSB module hardware not found (see Figure 10). Figure 10. EV Kit Software Warning Message Solution 2: • Verify that UPIO1 is configured for DOUTRB. • Verify that the AutoRead All Registers checkbox is checked. • Verify that the shunt for jumper JU6 is connected to pins 1-2. • Verify that the shunt for jumper JU2 is connected to pins 2-3. • Verify that the USB cable is connected. Problem 3: Pressing the Read button in the Read UPIO Inputs tab gives incorrect status (see Figure 7). Solution 3: Solution 1: • Verify that the power LED is lit. • Verify that the USB cable is connected. Problem 2: The register data at the bottom of the MAX5581 evaluation software’s main window is not correct (see Figure 1). • Verify that UPIO2 is configured as a GPI. • Verify that UPIO1 is configured for DOUTRB. • Verify that the shunt for jumper JU6 is connected to pins 1-2. • Verify that the shunt for jumper JU2 is connected to pins 2-3. • Verify that the USB cable is connected. ______________________________________________________________________________________ 13 Evaluate: MAX5580–MAX5585 General Troubleshooting 14 DIN SCLK CS J1-36 J1-37 J1-38 Figure 11. MAX5581 EV Kit Schematic ______________________________________________________________________________________ 3 JU6 1 2 OUTB 3 JU1 1 2 DVDD DSP DOUT J1-35 DVDD UPIO2 AVDD C6 0.1µF C5 0.1µF J1-31 DVDD UPIO1 R21 10kΩ DGND 2 x 20 40-PIN RIGHT ANGLE FEMALE CONNECTOR J1-29 J1-28 J1-8 J1-7 J1-4 J1-3 J1-2 J1-1 J1 OUTA 1 2 DIN SCLK DIN SCLK CS R2 10kΩ R10 OPEN GND 3 I.C. I.C. 7 5 8 R3 10kΩ 4 R9 OPEN 5 4 3 2 1 C2 0.1µF AVDD AGND R11 OPEN R1 10kΩ C1 10µF GNDS OUTF 6 OUTS FB1 MAX6126 CS R4 10kΩ R12 OPEN NR IN U2 PU SCLK 7 CS 6 OUTA FBA OUTB 8 DIN MAX5581 U1 REF AGND AVDD FBB 18 JU3 CUT HERE 19 JU4 CUT HERE 20 AVDD AGND REF 9 UPIO1 DVDD DGND DSP OUTD FBD OUTC 10 UPIO2 R13 OPEN 16 R6 10kΩ R5 10kΩ SW1 R19 100kΩ DVDD FBC 17 C7 0.1µF R20 1kΩ JU5 CUT HERE R15 OPEN OUTC OUTD OUTC OUTB SW2 R17 100kΩ DVDD 11 12 13 14 15 R14 OPEN OUTA R18 1kΩ C3 0.1µF R7 10kΩ DVDD R8 10kΩ R16 OPEN J2 OUTD 3 JU2 1 2 DSP DSP DOUT DOUT UPIO1 UPIO1 UPIO2 UPIO2 DGND DVDD DGND 10 8 6 4 2 2 x 5 10-PIN HEADER C4 10µF 9 7 5 3 1 Evaluate: MAX5580–MAX5585 MAX5581 Evaluation Kit/Evaluation System MAX5581 Evaluation Kit/Evaluation System Figure 13. MAX5581 EV Kit PC Board Layout—Component Side Figure 14. MAX5581 EV Kit PC Board 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 ____________________ 15 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. Evaluate: MAX5580–MAX5585 Figure 12. MAX5581 EV Kit Component Placement Guide— Component Side