MAX9776EVKIT+

19-0776; Rev 0; 3/07 MAX9776 Evaluation Kit The MAX9776 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that evaluates the MAX9776 ultra-low EMI, 1.5W filterless Class D audio power amplifier with 80mW DirectDrive™ headphone amplifier. The MAX9776 EV kit offers highly programmable and flexible input and output routing, which allows many combinations of balanced and singleended signals to be connected. The MAX9776 EV kit also includes Windows ® 98SE/2000/XP-compatible software, which provides a simple graphical user interface (GUI) for exercising the MAX9776’s features. Features
1.5W Speaker Output (4Ω, VDD = 5V)
80mW DirectDrive Headphone Amplifier
Highly Programmable Input and Output Modes
Controlled Through USB
Proven PCB Layout
Windows 98SE/2000/XP-Compatible Evaluation Software
Fully Assembled and Tested Windows is a registered trademark of Microsoft Corp. Component Suppliers SUPPLIER PHONE WEBSITE AVX 843-946-0238 www.avxcorp.com TDK 847-803-6100 www.component.tdk.com TOKO 847-297-0070 www.tokoam.com Ordering Information PART MAX9776EVKIT+ TYPE INTERFACE EV kit USB interface +Denotes a lead-free and RoHS-compliant EV kit. Note: Indicate that you are using the MAX9776 when contacting these component suppliers. Component List DESIGNATION QTY C1–C6 6 C11 1 C12, C28, C29, C41–C48, C58 12 C13–C23, C49, C50 13 C24, C25 C26 2 1 C32, C33 2 C36, C37 0 C40 1 DESCRIPTION 100pF ±5%, 10V C0G ceramic capacitors (0603) TDK C1608C0G1H101K 0.01µF ±10%, 25V X7R ceramic capacitor (0603) TDK C1608X7R1H103J 0.1µF ±10%, 25V X7R ceramic capacitors (0603) TDK C1608X7R1E104J 1.0µF ±10%, 16V X5R ceramic capacitors (0603) TDK C1608X5R1C105M 33µF ±10%, 10V tantalum capacitors (C-case) AVX TAJC336K010R 0.47µF ±10%, 10V X7R ceramic capacitor (0603) TDK C1608X7R1C474K 0.033µF ±10%, 10V X7R ceramic capacitors (0603) TDK C1608X7R1H333K Not installed (0603) 3300pF ±10%, 10V X7R ceramic capacitor (0603) TDK C1608X7R1H332K DESIGNATION QTY DESCRIPTION C51, C52, C53 3 C54, C55 2 C56, C57 2 D1 1 10µF ±10%, 16V X5R ceramic capacitors (1206) TDK C3216X5R1C106M 22pF ±5%, 10V C0G ceramic capacitors (0603) TDK C1608C0G1H220J 10pF ±5%, 10V C0G ceramic capacitors (0603) TDK C1608C0G1H100J Green LED (0603) D2 0 Not installed (0603) D3 1 Red LED (0603) FB1–FB6, FB13 7 0Ω resistors (0603) FB7, FB8 2 0Ω resistors (1206) FB11, FB12 2 Ferrite beads, 3A (1206) J2 0 3.5mm surface-mount stereo headphone jack USB series “B” right-angle PC mount receptacle Not installed JU1–JU5 5 2-pin single-row headers JU6 1 L1, L2 2 3-pin single-row header 33µH ±20%, 1.4A inductors TOKO B1000AS-330M HPJK 1 J1 1 ________________________________________________________________ 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 Evaluates: MAX9776 General Description MAX9776 Evaluation Kit Evaluates: MAX9776 Component List (continued) DESIGNATION QTY R1, R2, R18 0 Not installed, resistors DESCRIPTION R3, R4 2 22Ω ±5% resistors (0603) R7–R10 4 27Ω ±5% resistors (0603) R11 1 220Ω ±5% resistor (0603) R12 1 470Ω ±5% resistor (0603) R13, R14, R15 3 1.5kΩ ±5% resistors (0603) R16 1 2.2kΩ ±5% resistor (0603) R17 1 10kΩ ±5% resistor (0603) R19 1 1kΩ ±5% resistor (0603) U1 1 U2 1 U3 1 U4 1 U5 1 MAX9776ETJ+ (32 TQFN, 5mm x 5mm x 0.8mm) MAXQ2000-RAX+ (68-pin QFN-EP) 93C46 type 3-wire EEPROM (8-pin SO) FTDI FT232BL (TQFP-32L, 7mm x 7mm) MAX8511EXK33+T (SC70-5) U6 1 MAX8511EXK25+T (SC70-5) Y1 1 16MHz crystal Y2 1 6MHz crystal Y3 0 Not installed — 6 Shunts — 1 PCB: MAX9776 Evaluation Kit+ — 1 USB high-speed A-to-B cable (1.5m) Recommended Equipment • 5V, 1.5A power supply Stereo audio source (i.e., CD player, MP3 player) One 4Ω (or 8Ω) speaker The MAX9776 EV kit (included with USB cable) A user-supplied Windows 98SE/2000/XP PC with a spare USB port Note: In the following section(s), software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows 98SE/2000/XP operating system. 2 1) Visit the Maxim Integrated Products website (www.maxim-ic.com/evkitsoftware) to download the latest version of the EV kit software, 9776Rxx.ZIP. Save the EV kit software to a temporary folder and unzip the 9776Rxx.ZIP file. 2) Install the MAX9776 evaluation software on your computer by running the INSTALL.EXE program. The program files are copied and icons are created in the Windows Start | Programs menu. 3) Make sure the shunts of all jumpers on the MAX9776 EV kit are in the following default positions. JU1: (Open) JU2: (Open) JU3: (Open) INA is stereo input INB is stereo input INC is stereo input JU4: (1-2) SDA connected to on-board microcontroller SCL connected to on-board microcontroller Normal operation JU5: (1-2) JU6: (1-2) Quick Start • • • • Procedure Do not turn on the power supply until all connections are made: 4) Connect the speaker across FOUT+ and FOUTpads. 5) Connect the positive terminal of the 5V power supply to the VDD pad and the ground terminal of the power supply to the GND pad. 6) Connect the stereo audio source across the INA1, INA2, and GND pads. 7) Turn on the audio sources, and then turn on the power supply. 8) Connect the USB cable from the PC to the MAX9776 EV kit board. A Building Driver Database window pops up in addition to a New Hardware Found message if this is the first time the EV kit board is connected to the PC. If you do not see a window that is similar to the one described above after 30s, remove the USB cable from the MAX9776 EV kit and reconnect it. Administrator privileges are required to install the USB device driver on Windows 2000/XP. Refer to the TROUBLESHOOTING_USB.PDF document included with the software if you have any problems during this step. _______________________________________________________________________________________ MAX9776 Evaluation Kit 12) Ensure the audio signal is audible in the speaker. The EV kit software automatically detects the MAX9776 EV kit, enables the mono Class D speaker amplifier, and mixes the stereo input signal to a mono signal. The mono signal is sent to the mono Class D output. Detailed Description of Software The MAX9776 EV kit GUI software provides an easy user interface (Figure 1) to control the programmable features of the MAX9776. To start the MAX9776 EV kit GUI software, double-click the MAX9776 EV kit icon created during installation. The user will have to wait approximately 2s while the software detects the MAX9776 EV kit. Figure 1. MAX9776 EV Kit Software GUI Window _______________________________________________________________________________________ 3 Evaluates: MAX9776 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:\Program Files\MAX9776 (default installation directory) using the Browse button. 10) Start the MAX9776 EV kit software by opening its icon in the Start menu. 11) Check the Power Up checkbox in the Control Register panel. Evaluates: MAX9776 MAX9776 Evaluation Kit Input Select and Status Control Register The Input Select and Status panel gives the capability to select the input mode between single-ended stereo, right-channel differential, left-channel differential, and mono differential for input channels INA, INB, and INC. The Input Select and Status panel also displays the current volume settings for INA, INB, and INC. INA can be configured to accept a stereo single-ended signal or a differential mono signal. Click the STEREO S/E radio button to configure INA for a stereo single-ended signal. Click the MONO DIFF radio button to configure INA for a mono differential input signal. INB and INC can be configured to accept a stereo single-ended signal or a differential signal. Check the L, R, or M radio buttons to configure the input to accept a differential signal and route that signal to either the right, left, or mono mixer. Refer to the functional diagram in the MAX9776 IC data sheet for details. The input mode is also selectable using the Input Mode pulldown menu inside the Input/Output Mode panel. Refer to the MAX9776 IC data sheet for details. The Control Register panel contains checkboxes for the remaining settings. These checkboxes control the INA gain boost, receiver gain boost, power up, 6dB input gain boost, mute control, and Class D oscillator mode. Check the INA 20dB Boost checkbox to apply an extra 20dB of gain to the INA path. Checking the Mono 6dB Boost checkbox applies 6dB of gain to the mono channel. Check the Power Up checkbox to enable the MAX9776 EV kit, clear the checkbox to shut down the kit. Input 6dB Boost applies an additional 6dB of gain to all the input paths. Check Mute to mute the MAX9776 outputs. Check Spread Spectrum Mode to enable the low-EMI spread-spectrum mode. Check Speaker Mono Mix to enable mono mixing for the speaker amplifier. If this box is not checked, only the left channel will play at speaker output. Output Select and Status The output mode of the speaker, headphone, and receiver amplifiers can be controlled within the Output Control and Status panel. The output mode of the speaker, headphone, and receiver amplifiers can also be selected using the Output Mode pulldown menu inside the Input/Output Mode panel. Refer to the MAX9776 IC data sheet for details. Input/Output Mode The input and output modes are selectable using the pulldown menus inside this panel. Refer to the MAX9776 IC data sheet for details. Volume Control The scroll bars inside the Volume Control panel individually control the volume setting of the MAX9776’s left channel, right channel, and mono channel. If the Lock L/R channel checkbox is checked, the volume of both left and right channels will be equal and change simultaneously. The current volume settings for INA, INB, and INC inside the Input Select and Status panel will be updated automatically as the volume control scroll bar is moved. 4 Reset, Help, and Exit Buttons There are three buttons at the bottom-right corner of the MAX9776 EV kit software GUI window: Reset, Help, and Exit. Press the Reset button to reestablish the connection between the PC and the EV kit, and return the MAX9776 EV kit to its power-on-reset setting. The Help button displays the current software version. It also provides information on how to obtain the latest MAX9776 EV kit software and data sheet. Press the Exit button to quit the MAX9776 EV kit software. Detailed Description of Hardware The MAX9776 EV kit board provides a proven layout for evaluating the MAX9776. The EV kit comes with MAX9776ETJ+. Input Mode Setting The audio input terminals on the MAX9776 EV kit are flexible and can be configured as mono single-ended inputs, stereo single-ended inputs, or differential inputs. Any of the inputs can be routed to left, right, or mono input mixers. Jumpers JU1–JU3 can be used to ground INA2, INB2, and INC2, respectively. Outputs The MAX9776 EV kit allows connection of stereo headphones, a mono receiver speaker, and a mono loudspeaker. A 3.5mm headphone jack is provided to connect stereo headphones. The mono receiver speaker output is labeled OUTRX. Connect the receiver speaker between OUTRX and one of the adjacent GND pads. _______________________________________________________________________________________ MAX9776 Evaluation Kit connected between the VDD and GND pads. All other support devices are powered from the USB supply. Class D and EMI Filtering Hardware Shutdown Control Two types of filters are available on the Class D output. One filter is an LCR filter intended to be used to connect the Class D output to an audio analyzer or oscilloscope. The output of this filter is between FOUT+ and FOUT-. The second filter is an EMI filter consisting of ferrite beads and capacitors. The ferrite beads and capacitors are included in the MAX9776 EV kit’s shipping box. Install the EMI filter by removing the 0Ω resistors from pads FB7 and FB8 and installing the ferrite beads. Also install the included capacitors on pads C36 and C37. Be sure to remove inductors L1 and L2 before EMI testing is started. Connect the load across test points OUT+ and OUT-. Jumper JU6 controls the hardware shutdown function of the MAX9776 EV kit. This will shut down the entire MAX9776 and reset all the registers to their power-on defaults. See Table 1 for shutdown shunt positions. MAX9776 I2C Address To use the MAX9776 EV kit with a user-supplied I2C interface, remove the shunts on jumper JU4 and JU5. Connect SDA, SCL, and GND lines from the usersupplied I2C interface to the corresponding pads on the MAX9776 EV kit board. Depending on the configuration of the user-supplied I2C interface, it may be necessary to install I2C pullup resistors R1 and R2. The MAX9776 is an I2C/SMBus slave device that can only be written to. The slave address is fixed to 1001101x in binary. Power Supply The MAX9776 EV kit board is powered from both a usersupplied +2.7V to +5.5V supply, and the +5V USB supply. U1 is powered by a user-provided DC power supply Table 1. Hardware Shutdown Selection (JU6) POSITION FUNCTION 1-2* Normal operation 2-3 Power-down mode *Default position. User-Supplied I2C Interface _______________________________________________________________________________________ 5 Evaluates: MAX9776 Connect the mono loudspeaker between the FOUT+ and FOUT- pads. Evaluates: MAX9776 MAX9776 Evaluation Kit C24 33µF 10V VDD FB12 C12 0.1µF FB11 C11 0.01µF INA1 C19 1.0µF FB1 27 FB3 C15 1.0µF C3 100pF FB4 C16 1.0µF GND 24 INB1 INB2 C4 100pF JU2 GND FB5 C17 1.0µF C5 100pF FB6 C18 1.0µF 19 C6 100pF JU3 GND 9 1 CPVDD INA1 OUT- INA2 OUT+ INB1 OUTRX HPR INB2 2 HPL INC1 C1P VBIAS R1 OPEN JU4 GND 6 SDA SDA PGND VDD SCL PGND 5 SCL CPGND VDD JU6 FGND OUT+ C28 0.1µF C32 0.033µF L2 33µH FOUT+ R4 22Ω FGND 18 3 4 2 1 10 HPJK HPL C22 1.0µF 13 11 25 C23 1.0µF GND VDD 4 VDD 29 C25 + 33µF 10V 12 FGND 32 SHDN N.C. N.C. N.C. 7 8 23 N.C. 26 N.C. N.C. 28 31 FGND Figure 2a. MAX9776 EV Kit Schematic (Sheet 1 of 3) 6 C33 0.033µF OUTRX HPR 16 FGND C26 0.47µF C29 0.1µF FGND 20 FGND 3 SCL FB8 L1 33µH FOUT- C37 OPEN R2 OPEN JU5 OUTC36 OPEN INC2 CIN 1 2 3 FGND FB7 MAX9776 VDD SDA GND PVDD U1 22 14 INC1 INC2 17 R3 22Ω C14 1.0µF C2 100pF JU1 15 VDD CPVSS VSS 30 C1 100pF FB2 INA2 21 C13 1.0µF C58 0.1µF C20 C21 1.0µF 1.0µF _______________________________________________________________________________________ GND MAX9776 Evaluation Kit Evaluates: MAX9776 +5V R12 470Ω C45 0.1µF J1 USB C41 0.1µF C53 10µF FB13 C42 0.1µF +5V J1-1 +3.3V 30 C43 0.1µF R9 27Ω 6 C40 3300pF 8 J1-2 AVCC +5V +5V 3 VCC 26 VCC C48 0.1µF 13 VCCIO 3V3OUT TXD USBDM RXD RTS R10 27Ω 7 J1-3 USBDP CTS R13 1.5kΩ J1-4 U4 FT232BL 5 DTR RSTOUT DSR RESET DCD 25 P71 24 P70 23 P52 22 P65 21 P53 20 P64 +5V 4 C54 22pF 27 XTIN RI Y2 6MHz TXDEN C55 22pF 28 +5V 8 6 VCC CS 1 32 2 1 ORG U3 SK 93C46 3 7 N.C. DI C44 0.1µF 5 GND D0 R16 2.2kΩ 4 3 C50 1.0µF EESK OUT EEDATA 31 PWREN TEST +5V +5V +3.3V U5 RXLED PWRCTL +5V IN EECS 2 R17 10kΩ 1 TXLED XTOUT 5 IN U6 C52 10µF MAX8511 2 GND GND 9 +2.5V 1 3 SHDN AGND 29 OUT C51 10µF GND 2 18 16 12 11 TRX +3.3V 14 R11 220Ω 15 1 2 D1 10 17 +3.3V 5 MAX8511 SHDN SLEEP GND 19 R14 1.5kΩ P61 R7 27Ω SDA R15 1.5kΩ P60 R8 27Ω SCL C49 1.0µF Figure 2b. MAX9776 EV Kit Schematic (Sheet 2 of 3) _______________________________________________________________________________________ 7 14 15 16 17 28 42 P7.1/RX0/INT15 VLCD VLCD1 VLCD2 VADJ SEG0/P0.0 SEG1/P0.1 SEG2/P0.2 SEG3/P0.3 SEG4/P0.4/INT0 SEG5/P0.5/INT1 SEG6/P0.6/INT2 SEG8/P1.0 VDDI0 SEG17/P2.1 P6.2/T2B/OW_OUT SEG18/P2.2 P6.1/T1/INT13 U2 MAXQ2000 SEG19/P2.3 P6.0/T18/INT12 SEG20/P2.4 P5.7/MISO SEG21/P2.5 P5.6/SCLK SEG22/P2.6 P5.5/MOSI SEG23/P2.7 P5.4/SS SEG24/P3.0 P5.3/TX1/INT11 SEG25/P3.1 P5.2/RX1/INT10 SEG26/P3.2 32KIN 27 51 50 C57 10pF 48 P65 47 P64 46 45 44 P61 43 P60 41 40 39 38 37 P53 36 P52 34 Y3 OPEN SEG27/P3.3 GND GND 32KOUT 18 19 20 21 22 23 24 25 26 29 30 31 32 J2-6 +3.3V 1 2 R18 OPEN +3.3V J2-4 J2-3 J2-2 J2-5 J2-10 J2-9 TRX J2-1 J2-8 D2 2 1 35 33 J2 JTAG R19 1kΩ D3 Figure 2b. MAX9776 EV Kit Schematic (Sheet 3 of 3) (continued) 8 C47 0.1µF RESET 13 +3.3V P6.3/T2/OW_IN P4.3/TD0 12 52 SEG16/P2.0 P4.2/TM5 11 53 54 P6.4/TOB/WKOUT0 P4.1/TDI/INT19 10 55 SEG15/P1.7 P4.0/TCK/INT18 8 9 56 P6.5/TO/WKOUT1 COM0 7 57 SEG14/P1.6 SEG35/COM1 6 58 SEG13/P1.5 SEG34/COM2 5 59 HFXOUT SEG33/COM3 4 60 SEG12/P1.4 SEG32 3 61 62 C56 10pF Y1 16MHz SEG31/P3.7/INT7 2 63 SEG11/P1.3 SEG30/P3.6/INT6 1 64 HFXIN SEG29/P3.5/INT5 C46 0.1µF 65 VDD SEG28/P3.4/INT4 49 66 SEG7/P0.7/INT3 +2.5V 67 SEG9/P1.1 68 P70 P7.0/TX0/INT14 P71 SEG10/P1.2 Evaluates: MAX9776 MAX9776 Evaluation Kit _______________________________________________________________________________________ MAX9776 Evaluation Kit Evaluates: MAX9776 Figure 3. MAX9776 EV Kit Component Placement Guide— Component Side Figure 4. MAX9776 EV Kit PCB Layout—Component Side _______________________________________________________________________________________ 9 Evaluates: MAX9776 MAX9776 Evaluation Kit Figure 5. MAX9776 EV Kit PCB Layout—Layer 2 (GND) 10 Figure 6. MAX9776 EV Kit PCB Layout—Layer 3 (Power) ______________________________________________________________________________________ MAX9776 Evaluation Kit Evaluates: MAX9776 Figure 7. MAX9776 EV Kit PCB Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2007 Maxim Integrated Products Boblet is a registered trademark of Maxim Integrated Products, Inc.