19-5982 Rev 0 7/11 MAX98306 Evaluation Kit Evaluates: MAX98306 General Description Features The MAX98306 evaluation kit (EV kit) is a fully assembled S 2.6V to 5.5V Single-Supply Operation and tested PCB that evaluates the MAX98306 stereo 3.2W S Single-Ended or Differential Audio Input Class D amplifier. The EV kit operates from a single 2.6V S Five Selectable Gains to 5.5V DC power supply and is capable of delivering S Filterless Operation 3.2W into a 4I load. The EV kit accepts a differential or single-ended audio input and provides differential S Optional Class D Output Filters for Ease of outputs for the speaker. The device outputs can be Evaluation connected directly to a speaker load for filterless applica- S Low-Power Shutdown Mode tions. However, a filter can be added to ease evaluation. S Proven PCB Layout S Fully Assembled and Tested Ordering Information appears at end of data sheet. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION OUTL-, OUTL+, 0.1FF Q10%, 16V X7R ceramic 4 Test points OUTR-, OUTR+ capacitor (0402) C1 1 Murata GRM155R71C104K R1, R2 2 100kI Q5% resistors (0603) TDK C1005X7R1C104K R3R6 0 Not installed, resistors (0603) 3.2W Class D amplifier 10FF Q10%, 6.3V X7R ceramic U1 1 (14 TDFN) capacitor (0805) C2 1 Maxim MAX98306ETD+ Murata GRM21BR70J106K TDK C2012X7R0J106K 4 Shunts PCB: MAX98306 1FF Q10%, 25V X7R ceramic 1 EVALUATION KIT capacitors (0603) C3, C4, C17, C18 4 Murata GRM188R71E105K OPTIONAL COMPONENTS FOR 8I SPEAKER Murata GRM188R71E105M 0.22FF Q10%, 25V X7R C5C16, C19, Not installed, ceramic ceramic capacitors (0603) 0 C7C16 10 C20 capacitors (0603) Murata GRM188R71E224K TDK C1608X7R1E224K FB1FB4 4 0I resistors (0603) 22FH Q20%, 1A inductors FOUTL+, FOUTL-, L1L4 4 TOKO A916CY-220M FOUTR+, FOUTR-, 6 Binding posts GND, VDD R3R6 4 22I Q5% resistors (0603) OPTIONAL COMPONENTS FOR 4I SPEAKER White phono jack INL 1 (side-entry PCB mount) 0.47FF Q10%, 25V X7R Red phono jack ceramic capacitors (0603) INR 1 C7C16 10 (side-entry PCB mount) Murata GRM188R71E474K TDK C1608X7R1E474K JU1, JU4 2 2-pin headers JU2 1 3-pin header 10FH Q20%, 1.4A inductors L1L4 4 TOKO A916CY-100M JU3 1 5-pin header R3R6 4 10I Q5% resistors (0603) Not installed, inductorsshort L1L4 0 (PC trace) Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX98306 Evaluation Kit Evaluates: MAX98306 Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com TOKO America, Inc. 847-297-0070 www.tokoam.com Note: Indicate that you are using the MAX98306 when contacting these component suppliers. Quick Start Detailed Description of Hardware Recommended Equipment Filterless Output MAX98306 EV kit The MAX98306 EV kits filterless outputs (OUTL+, OUTL-, OUTR+, and OUTR-) can be connected directly to a 2.6V to 5.5V, 2A DC power supply speaker load without any filtering. Use the OUTL+ and Stereo audio input OUTL- test points or the OUTR+ and OUTR- test points Two 4I speakers to connect the speaker directly to the MAX98306 output. Procedures Filtered Output The EV kit is fully assembled and tested. Follow the steps Audio analyzers typically cannot accept the Class D below to verify board operation. Caution: Do not turn on amplifiers pulse-width modulated (PWM) signals at their the power supply until all connections are completed. inputs. Therefore, the EV kit features optional lowpass filters at the outputs to ease evaluation. As shipped, the 1) Verify that shunts are installed as follows: EV kits lowpass filter RC components are unpopulated JU1, JU4: Installed (single-ended input) and the L1L4 inductors are shorted on the PCB. JU2: Pins 1-2 (device enabled) To use the filtered output posts (FOUTL+, FOUTL-, JU3: Pins 1-3 (12dB gain) FOUTR+, and FOUTR-), remove the shorts on L1L4 and install components L1L4, C7C16, and R3R6 (pro- 2) Set the power-supply output to 5V. Disable the power vided separately with the EV kit). Use the output posts supply. to connect the filtered outputs to the audio analyzer. 3) Connect the power-supply ground terminal to the Additional filter components are provided with the EV kit GND PCB pad and the power-supply positive termi- for either a 4I or an 8I speaker. nal to the VDD PCB pad on the EV kit. Jumper Selection 4) With the audio source disabled, connect the left chan- Single-Ended/Differential Audio Inputs nel of the audio source to the INL phono jack or the The EV kit features jumpers JU1 and JU4 to select INL+ test pad. between a differential or single-ended input mode. See 5) Connect the right channel of the audio source to the Table 1 for JU1 and JU4 configurations. INR phono jack or the INR+ test pad. Shutdown Function (SHDN) 6) Connect the audio source ground to the GND test The EV kit features a 3-pin jumper (JU2) to control the pad. active-low shutdown input. Drive SHDN high to place the 7) Connect the first speaker across the OUTL+ and device in normal operation drive SHDN low to place the OUTL- test points. device in low-power shutdown mode. See Table 2 for 8) Connect the second speaker across the OUTR+ and shunt positions. OUTR- test points. Selectable Gain (GAIN) 9) Enable the power-supply output. The EV kit features a 5-pin jumper (JU3) to control the ICs five programmable gain settings. See Table 3 for 10) Enable the audio source. gain-control configuration. 11) Verify that the speakers are playing the audio source signal. Maxim Integrated Products 2