MAX19527EVKIT+

19-5522; Rev 0; 9/10 MAX19527 Evaluation Kit Features The MAX19527 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains all the components necessary to evaluate the performance of the MAX19527 50Msps octal, 12-bit analog-to-digital converter (ADC). The EV kit also includes Windows® 2000-, Windows XP®-, and Windows Vista®-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the ADC. S Single Power-Supply Operation The EV kit accepts single-ended analog inputs from an analog signal source and provides an on-board circuit that transforms the analog single-ended signal into a differential signal. The ADC digital LVDS outputs can be captured easily with Maxim’s data converter evaluation platform (DCEP). The EV kit operates from a single 3.3V power supply and provides on-board regulation for the analog, digital, and logic circuitries. S On-Board Clock-Shaping Circuit with Adjustable S Direct Interface with the Maxim DCEP Data Board Using a QSH Connector S Low-Voltage and Low-Power Operation S On-Board Single-Ended-to-Differential Transformer Circuitry S Differential or Single-Ended Clock Configuration Duty Cycle S On-Board or Stand-Alone SPI™ Interface Control S DCEP Board Available S Fully Assembled and Tested Ordering Information PART TYPE EV Kit MAX19527EVKIT+ DCEP Data Converter Evaluation Platform +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION B9, CMOUT, TP1–TP8 C1–C16, C58, C62–C65, C114 C41–C56 C57, C77, C81 QTY DESCRIPTION 10 Red PC test points 22 0.1FF Q10%, 10V X5R ceramic capacitors (0402) TDK C1005X5R1A104K or Murata GRM155R61A104K 16 39pF Q5%, 50V C0G ceramic capacitors (0402) TDK C1005C0G1H390J or Murata GRM1555C1H390J 3 1FF Q10%, 6.3V X5R ceramic capacitors (0402) TDK C1005X5R0J105K or Murata GRM155R60J105K QTY DESCRIPTION C59, C89, C90, C95–C98, C103–C106, C111, C112, C113, C130, C133, C135, C136, C137, C140, C141, C144, C145, C146 DESIGNATION 24 0.1FF Q10%, 50V X5R ceramic capacitors (0603) TDK C1608X5R1H104K or Murata GRM188R51H104K C60, C61, C66–C69 0 Not installed, ceramic capacitors (0603) C74, C78 2 220FF Q20%, 6.3V tantalum capacitors (C case) AVX TPSC227M006R0250 or KEMET T495C227K006ATE225 C75, C79 0 Not installed, tantalum capacitors (C case) Windows, Windows XP, and Windows Vista are registered trademarks of Microsoft Corp. SPI is a trademark of Motorola, Inc. ________________________________________________________________ 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: MAX19527 General Description Evaluates: MAX19527 MAX19527 Evaluation Kit Component List (continued) DESIGNATION C76, C80, C82 C83, C85, C86, C88, C131 C84, C87, C91–C94, C99-C102, C107–C110, C115, C116 C132 C134 QTY 3 5 16 1 1 DESCRIPTION 10FF Q20%, 10V X5R ceramic capacitors (1210) TDK C3225X5R1A106M or Murata GRM32ER61A106K 10FF Q20%, 10V X5R ceramic capacitors (0805) TDK C2012X5R1A106K Murata GRM219R61A106K 0.01FF Q10%, 50V X5R ceramic capacitors (0603) Murata GRM188R61H103K or TDK C1608X5R1H103K 1FF Q10%, 10V X5R ceramic capacitor (0603) TDK C1608X5R1A105K Murata GRM188R61A105K 0.033FF Q10%, 16V (min) X5R ceramic capacitor (0603) Murata GRM188R71E333K or TDK C1608X7R1E333K DESIGNATION QTY DESCRIPTION P1 1 USB type-B right-angle PC-mount receptacle R1–R32, R73–R76, R81–R84, R89, R90, R93, R95 44 100I Q1% resistors (0603) R33–R48 16 10I Q1% resistors (0402) R57–R72 16 0I ±5% resistors (0805) R77–R80, R85– R88, R91, R92, R96, R98, R99, R102, R103, R104, R105 0 Not installed, resistors (0603) R99, R103, and R104 are short (PC trace); all others are open R94 1 10kI potentiometer, 19-turn, 3/8in R97 1 100kI ±1% resistor (0603) R100, R101 2 49.9I ±1% resistors (0603) R130, R131 2 27I ±5% resistors (0603) R132 1 1.5kI ±5% resistor (0603) R133 1 2.2kI ±5% resistor (0603) R134, R137 2 10kI ±5% resistors (0603) R135 1 470I ±5% resistor (0603) R136 1 1.1I ±5% resistor (0603) SW1 1 Momentary 6mm pushbutton switch T1–T8 8 1:1, 800MHz RF transformers Mini-Circuits ADT1-1WT+ C138, C139, C142, C143 4 22pF Q5%, 50V C0G ceramic capacitors (0603) TDK C1608C0G1H220J CLK, IN1–IN8 9 SMA PC-mount connectors D1 1 Dual Schottky diode (SOT23) Central Semi CMPD6263S+ (Top Mark: D96) T9 1 1:2 RF transformer Coilcraft TTWB-2-B H1 1 120-position high-speed connector U1 1 H2 1 Dual-row (2 x 20) 40-pin header Octal 12-bit 50Msps ADC (144 CTBGA) Maxim MAX19527EXE+ J1 1 Dual-row (2 x 16) 32-pin header U2, U3 2 500mA LDO regulators (8 TDFN-EP*) Maxim MAX8902AATA+ (Top Mark: ABG) U4, U5, U6 3 Dual 2 x 2 crosspoint switches (32 TQFP) Maxim MAX9392EHJ+ 1 TinyLogic ULP-A inverter (6 SC70) Fairchild NC7WV04P6X (Top Mark: V07) J2 1 2-pin header J10 1 Dual-row (2 x 5) 10-pin header JU1–JU8, JU10, JU14, JU15 11 2-pin headers JU9 1 3-pin header JU11, JU12, JU13 3 4-pin headers JU20–JU27 0 Not installed, 2-pin headers— short 0 Not installed, ferrite bead (0603) L101 U7 2   _______________________________________________________________________________________ MAX19527 Evaluation Kit DESIGNATION QTY U8 1 DESCRIPTION 1 93C46 type 3-wire EEPROM (8 SO) Atmel AT93C46EN-SH-B U10 1 Ultra-high-speed microcontroller (44 TQFP) Maxim DS89C450-ENL+ 1 QTY DESCRIPTION U12 1 Quad three-state driver (14 SO) Fairchild 74AC125SC U13 0 Not installed, LDO regulator (5 SC70) U14 0 Not installed, level translator (14 TSSOP) Y1 1 14.7456MHz crystal Y2 1 6MHz crystal — 15 Shunts (JU1–JU15) — 1 PCB: MAX19527 EVALUATION KIT+ UART-to-USB converter (32 TQFP) FTDI FT232BL U9 U11 DESIGNATION Level translator (20 TSSOP) Maxim MAX3002EUP+ *EP = Exposed pad. Component Suppliers SUPPLIER PHONE WEBSITE AVX Corporation 843-946-0238 www.avxcorp.com Central Semiconductor Corp. 631-435-1110 www.centralsemi.com Coilcraft, Inc. 847-639-6400 www.coilcraft.com Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com KEMET Corp. 864-963-6300 www.kemet.com Mini-Circuits 718-934-4500 www.minicircuits.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Samtec, Inc. 800-726-8329 www.samtec.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX19527 when contacting these component suppliers. MAX19527 EV Kit Files FILE INSTALL.EXE DESCRIPTION Installs the EV kit files on your computer MAX19527.EXE Application program FTD2XX.INF USB device driver file UNINST.INI Uninstalls the EV kit software USB_Driver_Help_200.PDF USB driver installation help file _______________________________________________________________________________________   3 Evaluates: MAX19527 Component List (continued) Evaluates: MAX19527 MAX19527 Evaluation Kit Quick Start Recommended Equipment • MAX19527 EV kit • Single 3.3V, 1A DC power supply • Signal generator with low phase noise and low jitter for clock input (e.g., HP 8644B) • Signal generator (e.g., HP 8644B) • Maxim DCEP • Analog bandpass filters (e.g., K&L Microwave) for input and clock signals • User-supplied Windows 2000, Windows XP, or Windows Vista PC with two spare USB ports for analog signal input Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. Procedure The EV kit is a fully assembled and tested surface-mount board. Follow the steps below to verify board operation. Caution: Do not turn on power supplies or enable signal generators until all connections are completed. 7) Connect the USB cable from the computer’s type-A USB port to the DCEP board’s type-B USB port. 8) Connect the 3.3V, 1A power supply to the +3.3V PCB pad. Connect the ground terminal of this supply to the corresponding GND pad. 9) Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software and install it on your computer by running the INSTALL.EXE program. The program files are copied and icons are created in the Windows Start | Programs menu. 10) Apply power to the DCEP board at J4 using the DCEP board provided supply connector. 11) Enable the 3.3V power supply. 12) Enable the signal generators. 13) Set the clock signal generator for an output amplitude of ≥ 2.7VP-P (recommended +16dBm to +19dBm for optimum AC performance for input frequencies > 25MHz) and the frequency (fCLK) as appropriate. 14) Set the analog input signal generators for an output amplitude of ≤ 1.5VP-P, and to the desired frequency. 1) Verify that shunts are configured in their default positions (Table 1) for proper startup operation of the EV kit software. 15) Verify that the signal generators are phase locked to each other. Adjust the output power level of the signal generators to overcome cable, bandpass filter, and attenuation pad losses at the input. 2) Connect the clock generator output to the clock bandpass filter input. 16) Start the EV kit program by opening its icon in the Start | Programs menu. 3) Connect the output of the clock bandpass filter to the EV kit CLK SMA connector. 17) Refer to the Data Converter Evaluation Platform (DCEP) User’s Guide for information on installing the DCEP software. 4) Connect the outputs of the analog signal generators to the input of the signal bandpass filters. Keep the cable connection between the signal generators, filters, and EV kit board as short as possible for optimum dynamic performance. 5) Connect the output of the signal bandpass filters to the IN_ SMA connectors. It is recommended that a 3dB or 6dB attenuation pad be used to reduce reflections and distortion from the bandpass filter. 18) Start the DCEP program by opening its icon in the Start | Programs menu. 19) Create a new database in the DCEP by adding the device module file, MAX19527-EVK-xx.dsm. Refer to the Opening a New Database section in the Data Converter Evaluation Platform (DCEP) User’s Guide for additional information. 20) Collect data using the DCEP software. 6) Carefully connect the boards by aligning J5 on the DCEP board to H1 on the EV kit. Gently press them together. 4   _______________________________________________________________________________________ MAX19527 Evaluation Kit JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JU9 JU10 JU11 SHUNT POSITION Not installed Installed* Not installed Installed* Not installed Installed* Not installed Installed* Not installed Installed* Not installed Installed* Not installed Installed* Not installed Installed* IN3 input network disconnected from CMOUT IN3 input network connected to CMOUT IN4 input network disconnected from CMOUT IN4 input network connected to CMOUT IN5 input network disconnected from CMOUT IN5 input network connected to CMOUT IN6 input network disconnected from CMOUT IN6 input network connected to CMOUT IN7 input network disconnected from CMOUT IN7 input network connected to CMOUT IN8 input network disconnected from CMOUT IN8 input network connected to CMOUT SHDN connected to GND (power-management mode to SHDN = 0) Not installed Installed* CMOUT disconnected from input networks CMOUT connected to input networks 1-2* SCLK signal supplied by the USB circuitry 1-3 Maintains the ADC register’s content 1-4 For future use SCLK signal supplied by an external source at header J10 1-2* SDIO signal supplied by the USB circuitry 1-3 Maintains the ADC register’s content 1-4 For future use SDIO signal supplied by an external source at header J10 1-3 CS signal supplied by the USB circuitry Maintains the ADC register’s content 1-4 For future use Not installed JU15 IN2 input network connected to CMOUT SHDN connected to AVDD (power-management mode to SHDN = 1) 1-2* JU14 IN2 input network disconnected from CMOUT 2-3* Not installed JU13 IN1 input network connected to CMOUT 1-2 Not installed JU12 EV KIT FUNCTION IN1 input network disconnected from CMOUT Installed* CS signal supplied by an external source at header J10 1.8V LDO (U2) powers the AVDD input Not installed 1.8V LDO(U2) output disconnected from the AVDD input Installed* Not installed 1.8V LDO (U3) powers the OVDD input 1.8V LDO (U3) output disconnected from the OVDD input *Default position. _______________________________________________________________________________________   5 Evaluates: MAX19527 Table 1. Jumper Configuration (JU1–JU15) Evaluates: MAX19527 MAX19527 Evaluation Kit Detailed Description of Software Software Startup Before starting the MAX19527 EV kit software, verify that shunts are configured in their default states, as shown in Table 1 and a valid clock signal is applied at the EV kit CLK SMA connector. Upon starting the program, the EV kit software searches for the DS89C40 microcontroller interface circuit. The software then reads the ADC’s registers (0x00 to 0x10), updates the software GUI in the Input/Output/Clock and Power Management tab sheets, and places the register contents (in hex format) next to their respective Reg00-Reg10 register designators. User-Interface Panel The program’s main window contains two tabs, Input/ Output/Clock (Figure 1) and Power Management (Figure 2), which provide controls for the ADC’s software-configurable features. The Input/Output/Clock tab sheet provides group box controls for Output Format, LVDS Output Adjustments, Input Common Mode Voltage, and System Timing. The Power Management tab sheet provides controls for power management. Changes to the controls result in a write operation that updates the appropriate registers of the ADC. The registers are automatically read after each write operation to verify data sent. Additionally, a ReadRegs button is available to read all the ADC registers and to update the main window Reg00–Reg10 register designators. For reference, a list of registers and their content (in hex format) is provided in a column on the right side of the program’s main window. The Reset button resets the ADC registers to their power-on-default state. The bottom status bar of the main window provides the communication status of the EV kit microcontroller interface circuitry. The Address and Data labels display the last register address written to and its corresponding data, respectively. Figure 1. MAX19527 EV Kit Software (Input/Output/Clock Tab) 6   _______________________________________________________________________________________ MAX19527 Evaluation Kit Output Format The Output Format group box contains several functions that format the output data. The Reverse Bit Order checkbox allows the user to change the LVDS output data to a MSB-first format and displays the bit-order configuration. The Format checkbox configures the output data format to binary or two’s complement, and displays the current data format. The Test Data Level drop-down list gives the user the option of configuring the ADC’s OUT1–OUT8 channels to display the normal LVDS data outputs, or setting the channel’s outputs to a static high or low state. Data Test Pattern The Test Data drop-down list gives the user the option to choose between normal and test data modes. Select Normal from the drop-down list to operate the LVDS outputs under normal conditions. In normal operation, all GUI functions in the Data Test Pattern group box (with the exception of the Test Data drop-down list) are disabled. When Pattern is selected, all GUI functions in the Data Test Pattern group box become active. The Test Pattern drop-down list allows the user to choose between several test patterns for data-timing alignment. Selecting Normal from the Test Data dropdown list configures the test pattern channels according to the option selected in the Test Data Level drop-down list. Selecting Pattern from the Test Data drop-down list allows the user to generate factory test and custom patterns at the output channels. See Table 2 for generating the IC test patterns. Three buttons (WriteCUSTOM1, WriteCUSTOM2, and WriteCUSTOM1-2) and their respective edit boxes also become active when Pattern is selected from the Test Data drop-down list. The buttons are available for loading customized 8-bit test patterns in the ADC’s 0x07, 0x08, and 0x09 registers. The registers are updated by pressing the WriteCUSTOM1, WriteCUSTOM2, or WriteCUSTOM1-2 buttons. LVDS Output Adjustments The LVDS Output Adjustments group box contains controls to set the channel OUT1–OUT8 common-mode output voltage, output current, and back termination. The CM_Adjust drop-down list sets the output driver’s common-mode voltage. The Current Adjust drop-down list sets the output driver’s current. The Termination drop-down list sets the termination resistance. Input Common-Mode Voltage When checked, the SELF checkbox applies a commonmode voltage to the ADC’s IN_+/IN_- input pins and disables the common-mode input pins when not selected. The Adjust drop-down list sets the common-mode voltage according to the value selected. The selected common-mode voltage can be monitored through the CMOUT test point. When enabling SELF, verify that shunts are not installed on jumpers JU1–JU8 System Timing The Test FRAME Level drop-down list gives the user the option of configuring the ADC’s FRAME LVDS output channel to display the normal FRAME output frequency (identical to input clock frequency), or setting the FRAME output to a static high or low state. The CLK Controls group box contains controls for manipulating the input clock signal. The PLL Frequency drop-down list programs the clock multiplier for the internal PLL in order to set the sampling frequency range. Ensure that the input clock frequency, applied at the EV kit CLK SMA connector, falls between the selected minimum and maximum frequency in the drop-down list. The Output Phase drop-down list adjusts the phase of the serial LVDS output clock (CLKOUT), relative to the output data frame. Refer to the timing diagrams in the MAX19527 IC data sheet for additional information. The Test CLKOUT Level drop-down list gives the user the option of configuring the ADC’s CLKOUT LVDS output channel to display the normal CLKOUT signal, or setting the output signal to a static high or low state. The 100 Ohm Input Term checkbox switches 100I across differential clock inputs when checked. Table 2. Test Pattern Selection TEST PATTERNS OUTPUT Skew (010101010101) à repeats every frame SYNC (111111000000) à repeats every frame Custom Custom test pattern à repeats every two frames Ramp 12-bit ramp from 0 to 4095 and repeats Pseudo9 Pseudorandom data pattern (short 29 sequence) Pseudo23 Pseudorandom data pattern (long 223 sequence) _______________________________________________________________________________________   7 Evaluates: MAX19527 Input/Output/Clock Tab Evaluates: MAX19527 MAX19527 Evaluation Kit Refer to the System Timing Requirements section in the MAX19527 IC data sheet for additional information for configuring the Data, FRAME, and CLKOUT test levels. Power Management Tab Power Management Controls The Power Management group box contains two sets of controls. The first set is used only when the SHDN pin on the EV kit is set low and the second set is used only when the SHDN pin on the EV kit is set high. When checked, the IN1 Active–IN8 Active checkboxes enable the input channel, or disable the input channel when left unchecked. The Sleep/Nap Mode checkbox toggles between nap mode when checked and sleep mode when unchecked, as long as the IN1 Active–IN8 Active checkboxes are left unchecked. The Enable All and Disable All buttons are available to enable and disable all input channels simultaneously. For more details on power management, refer to the MAX19527 IC data sheet. Advanced User Interface A serial interface can be used by advanced users by selecting the Options | Interface (Advanced Users) menu item. Custom bit-banging firmware commands are used to implement a bidirectional SPI interface. Read addresses always begin with 0x8_ and write addresses always begin with 0x0_. For writing to registers, click on the Connection tab (Figure 3). Enter the raw command bytes value of 0x77 0x05 0xA0 0xA0 (where 0x05 is the register write address in hexadecimal, and 0xA0, 0xA0 are the data in this example), then press the Send raw command bytes button. Note that the custom firmware uses data transfer of two bytes. For reading registers, enter the raw command bytes value of 0x72 0x85 (where 0x85 is the register read address in hexadecimal), then press the Send raw command bytes button. The register address and content are displayed as the first and second byte of data listed under the Returned data [hexadecimal] label, respectively (Figure 4). Figure 2. MAX19527 EV Kit Software (Power Management Tab) 8   _______________________________________________________________________________________ MAX19527 Evaluation Kit Evaluates: MAX19527 Figure 3. Advanced User Interface Window (3-Wire Interface Tab)—Writing to a Register Figure 4. Advanced User Interface Window (3-Wire Interface Tab)—Reading a Register _______________________________________________________________________________________   9 Evaluates: MAX19527 MAX19527 Evaluation Kit Keyboard Navigation Press Ctrl + Tab to navigate to the tab sheets. The selected tab sheet is indicated by a dotted outline. Press the Tab key to select each GUI control. The selected control is indicated by a dotted outline. Using Shift + Tab moves the selection to the previously selected control. Buttons respond to the keyboard's space bar and 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 desired menu item. Most menu items have one letter underlined, indicating their shortcut key. When a number is entered into the edit boxes, it can be sent to the device by pressing the Enter key. The data is also sent when Tab or Shift + Tab is pressed. Detailed Description of Hardware The MAX19527 EV kit is a fully assembled and tested circuit board that contains all the components necessary to evaluate the performance of the MAX19527 50Msps octal, 12-bit ADC. The ADC accepts differential input signals; however, on-board transformers (T1–T8) convert the single-ended signals applied to the IN1–IN8 SMA connectors to the required differential signals. The input signals of the ADC can be measured using a differential oscilloscope probe at header J1. The ADC’s digital LVDS output signals are accessible at header H2. Output drivers (U4, U5, and U6) are used for buffering the LVDS output signals when interfacing the EV kit to the DCEP board. The EV kit can be configured for communicating to the SPI interface using the on-board USB circuitry or a usersupplied external 3-wire controller using jumpers JU11 JU12, and JU13. The EV kit is designed as a six-layer PCB to optimize the performance of the ADC. Separate analog, digital, and buffer power planes minimize noise coupling between analog and digital signals. The analog and clock inputs Table 3. AVDD Input Power Configuration (JU14) and the LVDS outputs use 100I differential microstrip transmission lines. All singled-ended digital outputs use 50I microstrip transmission lines. The trace lengths of the 100I differential LVDS output lines are matched to within a few thousands of an inch to minimize layoutdependent output-signal skew. Power Supplies The EV kit operates from a single 3.3V DC power supply applied at the +3.3V and GND PCB pads and provides on-board regulation to power the IC analog and digital circuit blocks, and the MAX9392 LVDS buffers. The analog circuit block (AVDD) is regulated to 1.8V using the MAX8902A (U2). To power the analog circuit using the EV kit circuitry, install a shunt on jumper JU14. To disconnect the 1.8V power source, remove the shunt at JU14. See Table 3 for proper JU14 configuration. The digital circuit block (OVDD) is regulated to 1.8V using the MAX8902A (U3). To power the digital circuit using the EV kit circuitry, install a shunt on jumper JU15. To disconnect the 1.8V power source from OVDD, remove the shunt on JU15. See Table 4 for proper JU15 configuration. Jumpers JU14 and JU15 are provided to disconnect the power sources or to measure current through AVDD and OVDD, respectively. Clock Input The data converter allows either differential or singleended signals to drive the clock inputs. The EV kit supports both methods. In single-ended operation, the clock signal is applied at the CLK SMA connector and connects to the ADC through a buffer (U7). In differential mode, an on-board transformer converts a user-supplied single-ended analog input and generates a differential analog signal, which is then applied to the ADC’s input pins. The clock signal applied to the ADC can be observed at header J2. Table 4. OVDD Input Power Configuration (JU15) SHUNT POSITION AVDD (V) SHUNT POSITION OVDD (V) Installed* 1.8V LDO (U2) powers the AVDD input Installed* 1.8V LDO (U3) powers the OVDD input Not installed Power disconnected from the AVDD input Not installed Power disconnected from the OVDD input *Default position. *Default position. 10   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit 1) Cut the traces at locations R99, R103, and R104. 2) Install 0I resistors at locations R96, R102, and R105. 3) Install a 49.9I ±1% resistor at location R98. In single-ended clock configuration, potentiometer R94 can be utilized to control the duty cycle of the clock input signal. Measure the clock input at header J2 and adjust R94 until the desired duty cycle is achieved. Input Signals Although the ADC accepts differential analog input signals, the EV kit only requires single-ended analog input signals. Insertion losses due to a series-connected filter and the interconnecting cables decrease the amount of power seen at the EV kit input. Account for these losses when setting the signal generator amplitude. On-board transformers (T1–T8) convert the single-ended analog input signals and generate the recommended differential analog signals at the ADC’s differential input pins. Jumpers JU1–JU8 are available to provide a common-mode voltage to the EV kit input circuit networks when jumper JU10 is installed. JU10 supplies the programmed common-mode voltage supplied by the ADC’s CMOUT output. Install a shunt on JU10 and the respective IN_ channel jumpers to set the input network common-mode voltage. See Table 5 for proper jumper configuration. Output Signals The ADC features eight 12-bit, serial, LVDS digital outputs (OUT_) that transmit the converted differential analog input signals (IN1–IN8). Two additional outputs (CLKOUT and FRAME) are provided for system timing. Refer to the System Timing Requirements section in the MAX19527 IC data sheet for additional information. Output Termination The ADC features trimmed, selectable internal termination resistors between the positive and negative line of each output (OUT1–OUT8, CLKOUT, and FRAME). The EV kit circuit also features 100I termination resistors for the ADC output, located at the inputs of the MAX9392 LVDS crosspoint switches (U4, U5, and U6). MAX9392 ICs are used to buffer the ADC’s outputs when connecting the DCEP board to the EV kit, which allows monitoring of the output signals at header H2. SPI Interface Control The EV kit communicates to the ADC’s SPI interface using the on-board USB circuitry or external 3-wire signals (applied at header J10). Place shunts across pins 1-2 of jumpers JU11, JU12, and JU13 to control the SPI interface using the USB circuitry. Remove shunts from JU11, JU12, and JU13 when using external 3-wire signals at header J10. See Tables 6, 7, and 8 for proper JU11, JU12, and JU13 configuration, respectively. Table 5. IN_ Common-Mode Input-Voltage Configuration (JU10, JU1–JU8) SHUNT POSITION JU10 INPUT NETWORKS (IN1–IN8) COMMON-MODE SETTING JU1–JU8 Installed* Not installed *Default position. X = Don’t care Installed* Input network connected to CMOUT Not installed Input common-mode voltage disconnected from CMOUT X Input networks disconnected from CMOUT Table 6. SCLK Input Configuration (JU11) SHUNT POSITION SCLK PIN EV KIT FUNCTION 1-2* Connects to SCLK EV kit level translator circuitry SCLK signal supplied by USB circuitry 1-3 Connects to ground Maintains the ADC register’s content 1-4 Connects to SCLK DCEP level translator circuitry For future use Connects to header J10-1 SCLK signal supplied by an external source at header J10 Not installed *Default position. ______________________________________________________________________________________   11 Evaluates: MAX19527 Configuring the EV Kit for Single-Ended Clock Operation To configure the EV kit for single-ended clock operation, the following modifications must be made to the clock circuit: Evaluates: MAX19527 MAX19527 Evaluation Kit To maintain the ADC’s current register content, place shunts across pins 1-3 of JU11, JU12, and JU13. Shutdown (SHDN) The ADC can also be placed in a low-power shutdown mode through jumper JU9. The SHDN pin is a toggle switch between two power-management states, shown in Figure 2 under the Power Management group box of the software interface. When a shunt is installed on pins 1-2 of JU9, SHDN is connected to AVDD and the user can select the appropriate settings for inputs IN1 Active–IN8 Active and Sleep/Nap Mode under the label **Use when SHDN = 1 (IC bump B10)**. When a shunt is installed on pins 2-3 of JU9, SHDN is connected to GND and the user can select the appropriate settings for inputs IN1 Active–IN8 Active and Sleep/Nap Mode under the label **Use when SHDN = 0 (IC bump B10)**. See Table 9 for proper JU9 configuration for shutdown control of the EV kit. Connecting the DCEP to the EV Kit The DCEP and EV kit board can be connected using the specified on-board connectors. H1 on the EV kit mates with J5 on the DCEP board. Alternatively, the two boards can be connected with coaxial ribbon cables (Samtec, part no. HQCD-060.00-STR-TBR-1). Note that it is necessary to use either the on-board connectors or cables to obtain a reliable electrical connection between the two boards. Using the DCEP with the EV Kit Maxim’s DCEP is required for evaluation of this EV kit. An EV kit-specific device module file is required to configure the DCEP software. The most up-to-date device module file can be downloaded from www.maxim-ic. com/evkitsoftware. When loading the DCEP device module file, select MAX19527-EVK-xx.dsm and verify that the device module GUI window corresponds to Figure 5. Refer to the Opening a New Database section in the Data Converter Evaluation Platform (DCEP) User’s Guide for additional information. Table 7. SDIO Input Configuration (JU12) SHUNT POSITION SDIO PIN EV KIT FUNCTION 1-2* Connects to SDIO EV kit level translator circuitry SDIO signal supplied by USB circuitry 1-3 Connects to ground Maintains the ADC register’s content 1-4 Connects to SDIO DCEP level translator circuitry For future use Not installed Connects to header J10-5 SDIO signal supplied by an external source at header J10 *Default position. Table 8. CS Input Configuration (JU13) SHUNT POSITION CS PIN EV KIT FUNCTION 1-2* Connects to CS EV kit level translator circuitry CS signal supplied by USB circuitry EV kit software 1-3 Connects to ground Maintains the ADC register’s content 1-4 Connects to CS DCEP level translator circuitry For future use Not installed Connects to header J10-3 CS signal supplied by an external source at header J10 *Default position. Table 9 SHDN Configuration (JU9) SHUNT POSITION SHND PIN EV KIT FUNCTION 1-2* Connected to AVDD Use **When SHDN = 1 (IC bump B10)** software GUI box controls 2-3 Connected to GND Use **When SHDN = 0 (IC bump B10)** software GUI box controls *Default position. 12   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit Evaluates: MAX19527 Figure 5. Device Module DCEP GUI Window ______________________________________________________________________________________   13 Evaluates: MAX19527 MAX19527 Evaluation Kit Figure 6a. MAX19527 EV Kit Schematic (Sheet 1 of 4) 14   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit Evaluates: MAX19527 Figure 6b. MAX19527 EV Kit Schematic (Sheet 2 of 4) ______________________________________________________________________________________   15 Evaluates: MAX19527 MAX19527 Evaluation Kit Figure 6c. MAX19527 EV Kit Schematic (Sheet 3 of 4) 16   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit Evaluates: MAX19527 Figure 6d. MAX19527 EV Kit Schematic (Sheet 4 of 4) ______________________________________________________________________________________   17 Evaluates: MAX19527 MAX19527 Evaluation Kit 1.0” Figure 7. MAX19527 EV Kit Component Placement Guide—Component Side 18   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit Evaluates: MAX19527 1.0” Figure 8. MAX19527 EV Kit PCB Layout—Component Side ______________________________________________________________________________________   19 Evaluates: MAX19527 MAX19527 Evaluation Kit 1.0” Figure 9. MAX19527 EV Kit PCB Layout (Inner Layer 2)—Ground Planes 20   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit Evaluates: MAX19527 1.0” Figure 10. MAX19527 EV Kit PCB Layout (Inner Layer 3)—Power Planes ______________________________________________________________________________________   21 Evaluates: MAX19527 MAX19527 Evaluation Kit 1.0” Figure 11. MAX19527 EV Kit PCB Layout (Inner Layer 4)—Ground Planes 22   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit Evaluates: MAX19527 1.0” Figure 12. MAX19527 EV Kit PCB Layout (Inner Layer 5)—Routing Plane ______________________________________________________________________________________   23 Evaluates: MAX19527 MAX19527 Evaluation Kit 1.0” Figure 13. MAX19527 EV Kit PCB Layout—Solder Side 24   ������������������������������������������������������������������������������������� MAX19527 Evaluation Kit Evaluates: MAX19527 1.0” Figure 14. MAX19527 EV Kit PCB Component Placement Guide—Solder Side ______________________________________________________________________________________   25 Evaluates: MAX19527 MAX19527 Evaluation Kit Revision History REVISION NUMBER REVISION_ DATE 0 9/10 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. 26 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ©  2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.