19-6305; Rev 0; 5/12 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B General Description The MAX5725A evaluation kit (EV kit) demonstrates the MAX5725A 12-bit, 8-channel, low-power DAC with selectable internal references and buffered voltage output. The IC is in a 20-pin TSSOP package. The EV kit provides control to change the DAC’s outputs, power operations, references, and watchdog time setting. The IC features a watchdog function that can be enabled to monitor the I/O interface for activity and integrity. The EV kit includes a USB-to-SPI interface circuit. The EV kit features Windows XPM-, Windows VistaM-, and WindowsM 7-compatible software that provides a simple graphical user interface (GUI) for exercising the IC’s features. The EV kit comes with the MAX5725AAUP+ installed, which is the 12-bit SPI version. Contact the factory for samples of the pin-compatible MAX5723AUP+ (8-bit), MAX5724AUP+ (10-bit), and MAX5725BAUP+ (12-bit) versions. Ordering Information appears at end of data sheet. Features S Wide Input Supply Range: 2.7V to 5.5V S Independent Voltage for Digital I/O: 1.8V to 5.5V S Demonstrates 4.4µs (typ) Settling Time of Buffered Output S Precision Selectable Internal References Supporting 2.048V, 2.500V, and 4.096V S Demonstrates User-Supplied External Reference S Three Selectable Output Impedance (Termination) in Power-Down Mode 1kI, 100kI, or High Impedance S Power-Up Reset to Midscale or Zero S Supports Entire Family of Octal SPI/I2C DACs S Windows XP-, Windows Vista-, and Windows 7-Compatible Software S USB-Powered (Cable Included) S Demonstrates Configurable Interface Watchdog Timer S Fully Assembled and Tested with Proven PCB Layout Figure 1. MAX5725A EV Kit Windows, Windows XP, and Windows Vista are registered trademarks 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. MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Component List DESIGNATION C1, C13, C15 QTY 3 DESCRIPTION 10FF Q10%, 10V X7R ceramic capacitors (0805) Murata GRM21BR71A106K DESIGNATION QTY R1, R2, R28 3 4.7kI Q5% resistors (0603) DESCRIPTION R3 1 1MI Q5% resistor (0603) R5, R18–R26 10 1.5kI Q5% resistors (0603) R6, R7 2 27I Q5% resistors (0603) R8 1 220I Q5% resistor (0603) R9–R13, R16 0 Not installed, resistors (0402) R9–R13 are short (PC trace); R16 is open R14, R15 0 Not installed, resistors (0603) R29 1 100kI Q5% resistor (0603) U1 1 12-bit, 8-channel DAC (20 TSSOP) Maxim MAX5725AAUP+ U2 1 Microcontroller (68 QFN-EP*) Maxim MAXQ2000-RAX+ C2, C3, C5, C10, C17, C19, C20, C24, C26–C29, C36 13 C4 1 100pF Q5%, 50V C0G ceramic capacitor (0603) Murata GRM1885C1H101J C6–C9, C25, C37–C40 0 Not installed, ceramic capacitors (0603) C11, C12 2 10pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H100J C14, C16, C30–C35 1FF Q10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C105K U3 0 EEPROM (8 SO) 8 U4 1 UART-to-USB converter (32 LQFP) C18 1 4.7FF Q10%, 10V X5R ceramic capacitor (0805) Murata GRM219R61A475K U5 1 3.3V LDO regulator (5 SC70) Maxim MAX8511EXK33+ U6 1 2.5V LDO regulator (5 SC70) Maxim MAX8511EXK25+ U7 1 2.5V voltage reference (8 SO) Maxim MAX6173AASA+ U8, U9, U10 3 Level translators (10 FMAXM) Maxim MAX1840EUB+ USB1 1 USB type-B, right-angle PCmount receptacle Y1 1 16MHz crystal (HCM49) Hong Kong X’tals SSM16000N1HK188F0-0 Y2 1 6MHz crystal (HCM49) Hong Kong X’tals SSL60000N1HK188F0-0 — 1 USB high-speed A-to-B cable (6 ft) — 14 Shunts — 1 PCB: MAX5725A EVALUATION KIT 0.1FF Q10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C104K C21 1 0.033FF Q10%, 25V X7R ceramic capacitor (0603) Murata GRM188R71E333K C22, C23 2 22pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H220J D1 1 Green LED (0603) DAC0–DAC7, IRQ, REF, +5V 11 Red multipurpose test points GND 1 Black multipurpose test point H1 0 Not installed, 10-pin (2 x 5) header H2 1 18-pin (2 x 9) header JU1, JU2, JU9, JU10, JU11, JU13 6 3-pin headers JU3, JU4, JU5 3 4-pin headers JU6, JU7, JU8, JU12, JU14 5 2-pin headers *EP = Exposed pad. µMAX is a registered trademark of Maxim Integrated Products, Inc. __________________________________________________________________ Maxim Integrated Products 2 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B 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 Note: Indicate that you are using the MAX5725A when contacting these component suppliers. MAX5725A EV Kit Files FILES DESCRIPTION INSTALL.EXE Installs the EV kit files on your computer MAX5725A.EXE Application program CDM20600.EXE Installs the USB device driver UNINSTALL.EXE Uninstalls the EV kit software USB_Driver_Help_200.PDF USB driver installation help file Quick Start Required Equipment • MAX5725A EV kit (USB cable included) • Windows XP, Windows Vista, or Windows 7 PC with a spare USB port • Digital voltmeter (DVM) 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. Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Verify that jumpers JU1–JU14 are in their default positions, as shown in Table 1. 3) Install the EV kit software on your computer by running the INSTALL.EXE program inside the temporary folder. The program files are copied to your PC and icons are created in the Windows Start | Programs menu. During software installation, some versions of Windows may show a warning message indicating that this software is from an unknown publisher. This is not an error condition and it is safe to proceed with installation. Administrator privileges are required to install the USB device driver on Windows. 4)Connect the USB cable from the PC to the EV kit board. A Windows message appears when connecting the EV kit board to the PC for the first time. Each version of Windows has a slightly different message. If you see a Windows message stating ready to use, then proceed to the next step. Otherwise, open the USB_Driver_Help_200.PDF document in the Windows Start | Programs menu to verify that the USB driver was installed successfully. 5)Start the EV kit software by opening its icon in the Start | Programs menu. The EV kit software main window appears, as shown in Figure 2. 6) Within the DACs tab sheet, press the EXECUTE button with the Quick DAC Output Voltage group box. 7)Use the GNDS pad for the negative terminal of the DVM and use the positive terminal to measure the voltage at the DAC_ test points. Verify that the voltages measured are 1.25V. 2)Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 5725ARxx. ZIP. Save the EV kit software to a temporary folder and uncompress the ZIP file. __________________________________________________________________ Maxim Integrated Products 3 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 2. MAX5725A EV Kit Software Main Window (DACs Tab) __________________________________________________________________ Maxim Integrated Products 4 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 3. MAX5725A EV Kit Software Main Window (Scripts Tab) __________________________________________________________________ Maxim Integrated Products 5 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 4. MAX5725A EV Kit Software Main Window (Configuration Status Tab) __________________________________________________________________ Maxim Integrated Products 6 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Detailed Description of Software The MAX5725A EV kit software can evaluate the SPI interface MAX5725A family of 12-/10-/8-bit DACs. The main software window has three tabs: DACs, Scripts, and Configuration Status. Within the DACs tab sheet (Figure 2), the user can set the reference and DAC outputs. The Scripts tab sheet (Figure 3) allows the user to send a sequence of write commands to the eight DACs, and load and save the write sequence. The Configuration Status tab sheet (Figure 4) displays the configuration settings for each DAC. In addition, the software allows the user to adjust the configuration, power, reset, and default settings. Demo Mode The EV kit software enters the demo mode when the USB connection is not detected. When in demo mode, all communication to the EV kit is disabled; however, most of the software is functional. Demo mode allows the user to evaluate the software without hardware connectivity. Part Selection The user must select the appropriate radio button in the Part Selection group box that corresponds to the installed Maxim IC DAC bits. SPI Interface When the software first starts up, the SPI radio button is selected automatically. If the user selects the I2C radio button, then the software searches for a valid I2C address that is on the bus. If no address is found, the software returns to the SPI radio button selection. The EV kit is capable of evaluating I2C parts by replacing U1. Once the I2C part is installed, refer to the I2C Address section in the MAX5825A EV kit data sheet. Reference The reference default configuration is set to 2.5V using the external voltage reference IC (U7). The external 2.5V reference can be connected between the EXT_REF pin and its corresponding ground. Select the External Ref radio button and type the reference voltage into the edit box. Removing the shunt from jumper JU11 allows internal reference options that include 2.048V, 2.5V, and 4.096V selection using the corresponding radio buttons. Make sure the VDD supply is greater or equal to the voltage reference selected for proper operation. When the EV kit uses the on-board 3.3V supply to power the IC, the 4.096V radio button selection will not provide the 4.096V. DAC Commands Within the DACs tab sheet (Figure 2), the user can set the output of the DACs with two options. The first option is the Quick DAC Output Voltage group box that allows the user to write and load the CODE to all the DACs. Set the desired output for each DAC using the corresponding slider and press the EXECUTE button. The second option is to write the return CODE, write the CODE, load the CODE, or write and load the CODE to the desired DAC using the drop-down lists and edit box within the Command group box. Press the EXECUTE button once all the settings are appropriately configured. DAC Commands (Script) Within the Scripts tab sheet (Figure 3), enter the desired Data on the left and choose the appropriate Command from the drop-down list. Pressing the EXECUTE button writes to the CODE and/or DAC registers and the Script Status changes from Incomplete to Complete. Refer to the MAX5725A IC data sheet for a list of possible commands. If a sequence of commands needs to be performed, adjust all Data edit boxes and Command drop-down lists accordingly, and press the EXECUTE ALL button. To reset the Script Status to Incomplete, press the RESET SCRIPT button. Data Logging Using the SAVE button, the sequence of commands can be saved into a text file format. To recall the sequence, press the LOAD button and select the appropriate text file. Configuration Status The Configuration Status tab sheet (Figure 4) displays the current status of the configuration, power, and default settings for each DAC. Read Back The EV kit reads back the return, CODE, DAC, and watchdog values. Check the INC checkbox to increment the address pointer and select the appropriate radio button to set the DOUT PHASE equal to 0 or 1 when reading back. Select the appropriate Read radio button and press the EXECUTE button in the Read Back group box. Asynchronous CLR A checked CLR Asserted checkbox drives the CLR pin of the IC low, which clears the content of both CODE and DAC registers. Unchecking the CLR Asserted checkbox drives the CLR pin high and writing new commands is allowed again. Asynchronous LDAC A checked LDAC Asserted checkbox drives the LDAC pin of the IC low, which allows writing to the CODE register and then automatically transfers to the DAC register to change the DAC’s output. Unchecking the LDAC Asserted checkbox drives the LDAC pin high. To change the DAC outputs, the user must write to the CODE registers, and then write to the DAC registers. __________________________________________________________________ Maxim Integrated Products 7 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Interface Watch Dog Use the Mask checkbox, Timeout edit box, and Safety Level radio buttons to set the watchdog. The timeout time range that can be entered into the edit box is 1ms to 4095ms. The user must allow enough timeout time to send data to the DAC(s). It is recommended that the user set the timeout time to the maximum time of 4095ms, because the time Windows takes to communicate with the part may vary. In addition, configure the DAC output settings before pressing the EXECUTE button. The IRQ circle changes from white to red when the IRQ signal goes low. Refer to MAX5725A IC data sheet for detailed description. Configuration The configuration command includes the Watch Dog radio buttons and the GATE_ENB, LDAC_ENB, and CLEAR_ENB checkboxes for selected DAC(s). See the Configuration Status tab sheet to monitor the settings on each DAC. Refer to MAX5725A IC data sheet for detailed description. Power The power command is selectable for individual DACs. When a DAC is selected, the channel is active. Other options include powering down with 1kI termination to GND, 100kI termination to GND, and high impedance. Once the appropriate selection is made, press the EXECUTE button. Reset The reset command allows the user to set or clear the gate, refresh or reset the watchdog timer, or issue a software reset or clear. Refer to MAX5725A IC data sheet for detailed description. Default The default command allows the user to set the default settings for individual DACs. Refer to MAX5725A IC data sheet for detailed description. Advanced User Interface There are two methods for communicating with the IC. The first is through the window shown in Figure 2. The second is through the Advanced User Interface window shown in Figure 4. The Advanced User Interface window becomes available by selecting the Options | Interface (Advanced User) menu item and allows execution of serial commands manually. This interface is not recommended unless the user has to change individual bits in the interface. Figure 5. Advanced User Interface Window (3-Wire Interface Tab) __________________________________________________________________ Maxim Integrated Products 8 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Detailed Description of Hardware The MAX5725A EV kit provides a proven layout for the MAX5725A IC. An on-board external 2.5V reference (MAX6173), USB interface circuitry, and jumpers to disconnect the on-board microcontroller are included on the EV kit. User-Supplied Power Supply The EV kit is powered completely from the USB port by default. To power the IC with a user-supplied power supply, move the shunt on jumper JU10 to the 2-3 position and apply a 2.7V to 5.5V power supply at the VDD_EXT and the nearest GND PCB pads on the EV kit. The on-board external 2.5V voltage reference (U7) is powered from the USB interface circuit when a shunt is installed in the 1-2 position on jumper JU13. To use the same external supply applied at the VDD_EXT PCB pad, move the shunt to the 2-3 position on JU13. User-Supplied Reference The on-board voltage reference (U7) generates a voltage reference of 2.5V. The user can apply an external voltage reference by moving the shunt on jumper JU11 to the 2-3 position and applying 2V to VDD at the REF_EXT PCB pad on the EV kit. If the internal reference is selected, the REF pin becomes an output. In this case, JU11 should be removed. User-Supplied SPI To evaluate the EV kit with a user-supplied SPI bus, remove shunts from jumpers JU1–JU4. Apply the usersupplied CS, SCLK, DIN, and DOUT signal to header pins H1-1, H1-3, H1-5, and H1-7, respectively. Connect the user-supplied SPI ground to header pins H1-2, H1-4, H1-6, and H1-8. User-Supplied IRQ, CLR, and LDAC Remove the shunts from jumpers JU5 and JU6. Apply the user-supplied IRQ, CLR, and LDAC to header pins H1-11, H1-15, and H1-17, respectively. Connect the user-supplied signal ground to header pins H1-12, H1-16, H1-18. Figure 6. Jumper Callouts __________________________________________________________________ Maxim Integrated Products 9 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Table 1. Jumper Settings (JU1–JU14) JUMPER SHUNT POSITION 1-2* JU1 2-3 Not installed 1-2* JU2 2-3 Not installed JU3 JU4 JU5 JU6 JU7 JU8 JU9 JU10 JU11 JU12 JU13 JU14 DESCRIPTION Connects the CS signal of the on-board microcontroller to the CS pin of IC U1. Do not install. User-supplied CS. Apply an appropriate signal at header pin H1-1. Connects the SCLK signal of the on-board microcontroller to the CS pin of IC U1. Do not install. User-supplied SCLK. Apply an appropriate signal at header pin H1-3. 1-2 Do not install. 1-3* Connects the DIN signal of the on-board microcontroller to the DIN pin of IC U1. 1-4 Do not install. 1-2 Do not install. 1-3* Connects the DOUT signal of the on-board microcontroller to the DOUT pin of IC U1. 1-4 Do not install. 1-2 Connects the LDAC pin of IC U1 to VDDIO. 1-3* Connects the LDAC signal of the on-board microcontroller to the LDAC pin of IC U1. 1-4 Connects the LDAC pin of IC U1 to GND. Installed* Not installed Installed Not installed* Installed Not installed* Connects the CLR signal of the on-board microcontroller to the CLR pin of IC U1. User-supplied CLR. Apply an appropriate signal at header pin H1-15. Do not install. Disconnects pullup resistor R1 from the CS pin of IC U1. Do not install. Disconnects pullup resistor R2 from the SCLK pin of IC U1. 1-2* Connects the VDDIO pin of IC U1 to the on-board 3.3V supply. 2-3 Connects the VDDIO pin of IC U1 to a user-supplied power supply between 1.7V and 5.5V (VDDIO_EXT). 1-2* Connects the VDD pin of IC U1 to the on-board +3.3V supply. 2-3 Connects the VDD pin of IC U1 to a user-supplied power supply between 2.7V and 5.5V (VDD_EXT). 1-2 User-supplied REF. The user must apply a voltage reference at the REF_EXT PCB pad. 2-3* Connects the on-board voltage reference IC (U7) to the REF pin of IC U1. Installed* Not installed Connects the M/Z pin of IC U1 to VDD. 1-2* Connects the M/Z pin of IC U1 to 100kI pulldown resistor. Powers IC U7 using the USB supply. 2-3 Powers IC U7 using the user-supplied power supply. Installed* Not installed Connects additional bypass capacitor C36 on the REF pin of IC U1. Disconnect additional bypass capacitor C36 on the REF pin of IC U1. *Default position. _________________________________________________________________ Maxim Integrated Products 10 +3.3V +3.3V +3.3V MAXQ_K3 IN R26 1.5kI R22 1.5kI U2_SCLK IN R25 1.5kI U2_CSB IN R21 1.5kI U2_MISO IN R20 1.5kI MAXQ_K2 IN R23 1.5kI MAXQ_K1 IN R19 1.5kI U2_SDA IN R18 1.5kI U2_SCL IN R24 1.5kI U2_MOSI IN +3.3V +3.3V +3.3V 6 GND 2 RST 9 VCC RST IO 9 VCC RST IO IN IN IN IN CLR IN LDAC IN U1_IRQB IN CSB SCLK DIN DOUT 6 GND 1 3 5 7 9 11 13 15 17 IO MAX1840 CLK U10 DVCC 2 +3.3V VDDIO 6 GND MAX1840 CLK U9 DVCC SHDN DATA CIN RIN VCC 7 C30 1µF 1 3 5 7 9 11 13 15 17 10 8 7 C34 1µF 10 8 7 C32 1µF 10 MAX1840 CLK 8 U8 9 +3.3V VDDIO SHDN DATA CIN RIN 2 DVCC SHDN DATA CIN RIN VDDIO 5 1 3 4 C35 1µF 5 1 3 4 C33 1µF 5 1 3 4 C31 1µF +3.3V VDDIO GND H2 2 4 6 8 10 12 14 16 18 2 4 6 8 10 12 14 16 18 IN U1_IRQB IN U1_SCLK IN U1_CSB IN U1_MISO IN U1_LDACB IN U1_CLRB IN U1_SDA IN U1_SCL IN U1_MOSI 3 JU4 VDDIO U1_LDACB IN 3 JU5 VDDIO U1_CLRB IN U1_MISO IN U1_MOSI IN 1 4 2 4 2 4 2 R2 4.7kI R1 4.7kI 3 JU3 VDDIO VDDIO VDDIO C5 0.1µF IN 1 JU6 1 1 1 1 4 3 2 1 2 JU8 JU7 GND TEMP IN I.C. U7 VDDIO JU2 JU1 R3 1MI 2 2 MAX6173 3 2 1 3 2 1 5 6 7 8 1 JU14 2 IN U1_SCL CSB IN REF VDD 1 JU12 IRQ 2 R29 100kI LDAC IN VDDIO R28 4.7kI U1_IRQB IN CLR IN DOUT IN DIN IN SCLK IN VDDIO IN U1_SCLK IN U1_SDA C3 0.1µF JU11 3 2 1 IN U1_CSB C4 100pF C36 0.1µF TRIM OUT N.C. I.C. 20 18 16 17 11 12 13 14 15 1 REF_EXT GND M/Z LDAC IRQ CLR VDDIO DOUT DIN U1 GND DAC1 DAC0 DAC7 DAC6 DAC5 DAC4 DAC3 DAC2 MAX5725A SCLK CSB REF VDD 9 8 7 6 5 4 3 2 19 10 DAC7 DAC6 DAC5 DAC4 DAC3 DAC2 DAC1 DAC0 VDD C40 OPEN C39 OPEN C38 OPEN C37 OPEN C9 OPEN C8 OPEN C7 OPEN C6 OPEN C2 0.1µF C1 10µF +3.3V +5V +3.3V JU9 JU13 JU10 GND GND 1 2 3 VDDIO 1 2 3 IN 1 2 3 VDD GNDS GND VDDIO_EXT GND VDD_EXT MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 7a. MAX5725A EV Kit Schematic (Sheet 1 of 2) _________________________________________________________________ Maxim Integrated Products 11 C16 1µF +5V R14 OPEN R15 OPEN 3 1 SHDN IN +5V 4 6 5 4 2 GND 4 3 2 1 SK CS DI GND C17 0.1µF 6 N.C. OUT 5 N.C. GND U3 OPEN VCC 8 +5V 5 3 2 1 MAX8511 U5 +5V 7 DC DO C25 OPEN 6 USB1 4 5 2 1 3 +5V +3.3V C15 10µF C19 0.1µF C14 1µF C23 22pF C22 22pF R6 27I R7 27I C18 4.7µF +5V 3 1 +5V SHDN IN Y2 6MHz C20 0.1µF +5V 1 2 U6 31 2 1 32 28 27 4 5 7 8 6 2 GND MAX8511 R5 1.5kI C21 0.033µF N.C. OUT TEST EEDATA EESK EECS XTOUT XTIN RESET# 4 C13 10µF 9 17 5 GND1 GND2 +2.5V 13 RTS# RXD TXD SLEEP# PWREN# PWRCTL RXLED# TXLED# TXDEN RI# DCD# DSR# DTR# CTSB# VCC2 VCCIO 29 VCC1 26 AGND RSTOUT# USBDP USBDM 3V3OUT AVCC 3 TDI IN TMS IN TDO IN TCK IN 10 15 14 11 12 16 18 19 20 21 22 23 24 25 IN IN IN IN IN IN IN IN 8 10 7 9 4 2 6 H1 D1 5 3 1 R8 220I RIB DCDB DSRB DTRB CTSB RTSB RXD TXD +3.3V +3.3V IN 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 SEG27/P3.3 SEG26/P3.2 SEG25/P3.1 SEG24/P3.0 SEG23/P2.7 SEG22/P2.6 SEG21/P2.5 SEG20/P2.4 SEG19/P2.3 SEG18/P2.2 SEG17/P2.1 SEG16/P2.0 SEG15/P1.7 SEG14/P1.6 SEG13/P1.5 SEG12/P1.4 SEG11/P1.3 MAXQ_K3 60 MAXQ2000-RAX U2 RESETB 3.3V +3.3V IN IN C10 0.1µF IN IN IN 33 IN 32 IN 31 34 32OUT P5.2/RX1/INT10 P5.3/TX1/INT11 P5.4/SS P5.5/MOSI P5.6/SCLK P5.7/MISO GND P6.0/T1B/INT12 P6.1/T1/INT13 P6.2/T2B/OW_OUT P6.3/T2/OW_IN P6.4/T0B/WKOUT0 P6.5/T0/WKOUT1 VDD HFXOUT HFXIN 59 58 57 56 55 54 53 52 IN 18 19 20 21 22 23 24 25 26 27 28 29 30 SEG31/P3.7/INT7 30 SEG8/P1.0 68 67 66 65 64 63 62 61 SEG9/P1.1 SEG30/P3.6/INT6 C26 0.1µF SEG7/P0.7/INT3 SEG32 MAXQ_K1 SEG0/P0.0 P4.0/TCK/INT8 TCK U4 FT232BL SEG6/P0.6/INT2 SEG33/COM3 IN VADJ P4.1/ TDI/INT9 IN VLCD2 P4.2 / TMS TDI +3.3V SEG28/P3.4/INT4 SEG4/P0.4/INT0 SEG35/COM1 VLCD TMS C28 0.1µF VLCD1 P4.3/TDO TDO C27 0.1µF SEG5/P0.5/INT1 SEG34/COM2 MAXQ_K2 SEG1/P0.1 GND SEG10/P1.2 SEG29/P3.5/INT5 SEG3/P0.3 COM0 RXD P7.0/ TX0/INT14 32KIN SEG2/P0.2 VDDIO TXD P7.1/RX0/INT15 RESET TDI C24 0.1µF EP +5V 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 R16 OPEN 1 2 C29 0.1µF TCK IN TDI IN TMS IN TDO IN RESET IN +2.5V IN IN IN IN IN IN IN IN IN IN C12 10pF R13 SHORT R12 SHORT R11 SHORT R10 SHORT R9 SHORT Y1 16MHz C11 10pF RTSB DTRB U2_CS IN IN IN IN IN U2_MOSI U2_SCLK U2_MISO U2_SCL U2_SDA DSRB CTSB DSRB DCDB RTSB RIB DTRB MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 7b. MAX5725A EV Kit Schematic (Sheet 2 of 2) _________________________________________________________________ Maxim Integrated Products 12 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 8. MAX5725A EV Kit Component Placement Guide—Component Side _________________________________________________________________ Maxim Integrated Products 13 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 9. MAX5725A EV Kit PCB Layout—Component Side _________________________________________________________________ Maxim Integrated Products 14 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Figure 10. MAX5725A EV Kit PCB Layout—Solder Side _________________________________________________________________ Maxim Integrated Products 15 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Ordering Information PART TYPE MAX5725AEVKIT# EV Kit #Denotes RoHS compliant. _________________________________________________________________ Maxim Integrated Products 16 MAX5725A Evaluation Kit Evaluates: MAX5723/MAX5724/ MAX5725A/MAX5725B Revision History REVISION NUMBER REVISION DATE 0 5/12 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. Maxim Integrated Products, 160 Rio Robles Drive, San Jose, CA 95134 408-601-1000 © 2012 Maxim Integrated Products 17 Maxim is a registered trademark of Maxim Integrated Products, Inc.