Evaluates: MAX98371 MAX98371 Evaluation System General Description Benefits and Features The MAX98371 evaluation system (EV system) evaluates 5.5V to 18V Single-Supply Operation (EV System) the MAX98371 digital input Class D speaker amplifier with USB Audio Streaming (EV System) dynamic headroom tracking. The EV system comprises 2 I S, Left-Justified, or TDM Input the MAX98371 development (DEV) board, Maxims audio Optional Output Filters interface 1 (AUDINT1) board, and the MAX98371 evalu- ation software. Proven PCB Layout The MAX98371 DEV board is a fully assembled and Fully Assembled and Tested tested PCB that contains the necessary circuitry and Windows 7- and Windows 8-Compatible Software connections to evaluate the MAX98371 device. It is recommended that the DEV board be evaluated with EV System Contents the AUDINT1 board as an EV system. The MAX98371 MAX98371 Development Board requires two supply inputs, 1.14V to 1.98V (DVDD) and 5.5V to 18V (PVDD), and can deliver 19W into an 8 Audio Interface 1 (AUDINT1) Board 2 load. Additionally, the MAX98371 supports standard I S, Two A-to-Mini B-USB Cables left-justified, and TDM digital audio interfaces. When evaluated as an EV system, the AUDINT1 board 2 provides the necessary logic rails and USB-to-I S and 2 USB-to-I C interfaces needed to evaluate the MAX98371 Ordering Information appears at end of data sheet. DEV board with only a single external power supply. Figure 1 provides an image of the EV system, highlighting the key areas on each board. Communication with the DEV board is facilitated by Windows 7- and Windows 8-compatible software that provides a simple and intuitive graphical user interface (GUI). The MAX98371 evaluation software is only for use with the MAX98371 EV system. AUDIO INTERFACE BOARD 1 MAX98371 DEVELOPMENT BOARD MSEL, MCLK J3A DVDD USB OUTN I2S AUDIO J3 USB2 I2C MAX98371 DEMO SW1 U1 J1 J1 EVAL DVDD OUTP I2C 1.2V/1.8V/3.3V USB1 J2 USB VIO CONTROL 1.8V/3.3V AUTOMATIC SW2 PVDD GND CONFIGURATION Figure 1. Simplified EV System Block Diagram Windows is a registered trademark and registered service mark of Microsoft Corporation. 19-7600 Rev 0 6/15 DAI DAIEvaluates: MAX98371 MAX98371 Evaluation System Software Install: Quick Start 1) Visit www.maximintegrated.com/evkitsoftware to Required Equipment download the latest version of the MAX98371 evalua- MAX98371EVSYS tion software, 98371Rxx.zip. Uncompress the down- MAX98371DEV loaded folder to a temporary location. MAXAUDINT001 2) Install the software and USB driver on your computer 4 or 8 speaker by running the Install.exe program. Program files are 5.5V to 18V, 2A DC power supply copied and icons are created in the Windows Start Programs Maxim Integrated MAX98371 Evalua- USB audio source (e.g., Windows Media Player or tion Software menu. During software installation, Win- iTunes) dows may display a message indicating that this soft- Two A-to-B mini-USB cables (provided with EV ware is from an unknown publisher. This is not an error System) condition, and it is safe to proceed with the installation. User-supplied PC with Windows 7 or Windows 8 OS 3) The USB driver is installed automatically at the same with two available USB ports time as the evaluation software. If the driver needs to be manually installed, navigate to the installation Required Software directory, Program Files (x86) Maxim Integrated MAX98371 Evaluation Software MAX98371 Evaluation Software usb driver, and Note: In the following sections, software-related items are run the CDMxxxxx.exe application. identified by bolding. Text in bold refers to items directly DEV Board Setup: from the evaluation software. Text in bold and under- 4) Connect the power supply between the PVDD and lined refers to items from the Windows operating system. GND binding posts. Reference Material 5) Set the power supply channel connected to PVDD to Audio Interface 1 (AUDINT1) data sheet 18V, but leave the power supply turned off. Connect MAX98371 IC data sheet the 4 or 8 speaker across the OUTP and OUTN binding posts. Procedure AUDINT1 Board Setup: The MAX98371 and AUDINT1 boards are fully assembled and tested. Follow these steps to set up the EV system 6) Set the DVDD jumper on the AUDINT1 board to the for device evaluation. 1.8V position. 7) Set the VIO jumper on the AUDINT1 board to the 1.8V Table 1. MAX98371 Software Install Folder position. FILE DESCRIPTION 8) Configure the jumper switches (I2S and I2C) with their actuators in the CONNECT (pins1-2) position. Installer for the MAX98705 Install.exe evaluation software 9) Configure the SW1 switch with its actuator in the EVAL position. usb driver USB driver folder CDM21000.exe USB driver installer Test: Shortcut to the computers 10) With the audio source disabled, connect the DEV Device Manager device manager board (J1 header) to the AUDINT1 board (J1 header). 11) Connect the USB cables to the USB1 and USB2 ports USB Driver Help.pdf USB driver installation help file on the AUDINT1 board. 12) Enable the power supply connected to PVDD. 13) Start the MAX98371 evaluation software and wait while the software connects to the EV system. Windows Media is a registered trademark and registered service mark of Microsoft Corporation. iTunes is a registered trademark of Apple, Inc. Maxim Integrated 2 www.maximintegrated.com