Evaluates: MAX98372 MAX98372 Evaluation System General Description Benefits and Features The MAX98372 Evaluation System (EV system) evaluates 5.5V to 18V Single-Supply Operation (EV System) the MAX98372 digital input Class D speaker amplifier with USB Audio Streaming (EV System) dynamic headroom tracking and automatic level control. 2 I S, Left-Justified, or TDM Input The EV system comprises the MAX98372 development Optional Output Filters (DEV) board, Maxims audio interface 1 (AUDINT1) board, and the MAX98372 evaluation software. Proven PCB Layout The MAX98372 DEV board is a fully assembled and tested Fully Assembled and Tested PCB that contains the necessary circuitry and connections to Windows 7- and Windows 8-Compatible Software evaluate the MAX98372 device. It is recommended that the DEV board be evaluated with the AUDINT1 board as an EV EV System Contents system. The MAX98372 requires two supply inputs, 1.14V MAX98372 Development Board to 1.98V (DVDD) and 5.5V to 18V (PVDD), and can deliver 19W into an 8 load. Additionally, the MAX98372 supports Audio Interface 1 (AUDINT1) Board 2 standard I S, left-justified, and TDM digital audio interfaces. Two A-to-Mini-B USB Cables 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 MAX98372 DEV board with only a single external power supply. The Simplified EV System Block Diagram 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 MAX98372 evaluation software is only for use Ordering Information appears at end of data sheet. with the MAX98372 EV System. Simplified EV System Block Diagram AUDIO INTERFACE BOARD 1 MAX98372 DEVELOPMENT BOARD MSEL, MCLK J3A DVDD USB OUTN I2S AUDIO J3 USB2 MAX98372 I2C 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 Windows is a registered trademark and registered service mark of Microsoft Corporation. 19-7761 Rev 0 10/15 DAI DAIEvaluates: MAX98372 MAX98372 Evaluation System Software Install: Quick Start 1) Contact Maxim to download the latest ver- Required Equipment sion of the MAX98372 evaluation software, MAX98372EVSYS MAX98372EVSwSetupVx.x.zip. Uncompress the down- MAX98372DEV loaded folder to a temporary location. MAXAUDINT001 2) Install the software and USB driver on your computer 4 or 8 speaker by running the MAX98372EVSwSetupVx.x.exe pro- 5.5V to 18V, 2A DC power supply gram. Program files are copied and icons are created in the Windows Start Programs Maxim Integrated USB audio source (e.g., Windows Media Player or MAX98372 Evaluation Software menu. During iTunes) software installation, Windows may display a message Two A-to-Mini-B USB cables (provided with EV indicating that this software is from an unknown pub- system) lisher. This is not an error condition, and it is safe to User-supplied PC with Windows 7 or Windows 8 OS proceed with the installation. with two available USB ports 3) The USB driver is installed automatically at the same time as the evaluation software. If the driver needs Required Software to be manually installed, navigate to the installation MAX98372 evaluation software directory, Program Files (x86) Maxim Integrated Note: In the following sections, software-related items are MAX98372 Evaluation Software USB Driver, and identified by bolding. Text in bold refers to items directly run the CDMxxxxx.exe application. from the evaluation software. Text in bold and under- DEV Board Setup: lined refers to items from the Windows operating system. 4) Connect the power supply between the PVDD and Reference Material GND binding posts. Audio Interface 1 (AUDINT1) data sheet 5) Set the power supply channel connected to PVDD to MAX98372 IC data sheet 18V, but leave the power supply turned off. Connect the 4 or 8 speaker across the OUTP and OUTN Procedure binding posts. The MAX98372 and AUDINT1 boards are fully assembled AUDINT1 Board Setup: and tested. Follow these steps to set up the EV system for device evaluation. 6) Set the DVDD jumper on the AUDINT1 board to the 1.8V position. Table 1. MAX98372 Software Install Folder 7) Set the VIO jumper on the AUDINT1 board to the 1.8V position. FILE DESCRIPTION 8) Configure the jumper switches (I2S and I2C) with their Installer for the actuators in the CONNECT (pins1-2) position. MAX98372EVSwSetupVx.x.exe MAX98372 evaluation 9) Configure the SW1 switch with its actuator in the software EVAL position. usb driver USB driver folder Test: CDM21000.exe USB driver installer 10) With the audio source disabled, connect the DEV Shortcut to the computers Device Manager board (J1 header) to the AUDINT1 board (J1 header). device manager 11) Connect the USB cables to the USB1 and USB2 ports USB driver installation USB Driver Help.pdf help file on the AUDINT1 board. 12) Enable the power supply connected to PVDD. Windows Media is a registered trademark and registered service mark of Microsoft Corporation. 13) Start the MAX98372 evaluation software and wait iTunes is a registered trademark of Apple, Inc. while the software connects to the EV system. Maxim Integrated 2 www.maximintegrated.com