19-5979 Rev 0 7/11 MAX98309 Evaluation Kit Evaluates: MAX98309/MAX98310 General Description Features The MAX98309 evaluation kit (EV kit) is a fully assembled S 2.5V to 5.5V Single-Supply Operation and tested circuit board that evaluates the MAX98309 S Differential or Single-Ended Input mono 1.4W Class AB audio amplifier. The amplifier gain S Pin-Selectable Turn-On Time can be set through external resistors. The EV kit operates S 1.8V Logic-Compatible SHDN Input from a single 2.5V to 5.5V power supply. S Proven PCB Layout The EV kit can also evaluate the MAX98310 internally fixed gain mono 1.4W Class AB audio amplifier. S Fully Assembled and Tested Ordering Information appears at end of data sheet. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION JU1 1 3-pin header 1FF Q10%, 16V X5R ceramic C1, C2, C3 3 capacitors (0402) JU2 1 4-pin header TDK C1005X5R1C105K JU3 1 2-pin header R1R4 4 10kI Q1% resistors (0402) 10FF Q10%, 6.3V X5R ceramic C4 1 capacitor (0603) SHDN 1 PCB miniature red test point Murata GRM188R60J106K Mono 1.4W Class AB audio U1 1 amplifier (9 WLP) 0.1FF Q10%, 16V X7R ceramic Maxim MAX98309EWL+ C5 1 capacitor (0402) Murata GRM155R71C104K 3 Shunts PCB: MAX98309 EVALUATION GND, OUT+, 4 Binding posts 1 KIT OUT-, VDD White side-entry, PCB-mount IN 1 phono jack 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 Note: Indicate that you are using the MAX98309 when contacting these component suppliers. 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.MAX98309 Evaluation Kit Evaluates: MAX98309/MAX98310 Shutdown Mode (SHDN) Quick Start The EV kit features 2-pin jumper JU1 to control the active- low shutdown input of the IC. Drive SHDN high to place Recommended Equipment the device in normal operation drive SHDN low to place MAX98309 EV kit the device in the low-power shutdown mode. See Table 1 2.5V to 5.5V DC supply for shunt positions. 8I speaker Turn-On Time Mono audio signal source The MAX98309/MAX98310 have excellent click-and-pop performance with respect to the SHDN pin activation/ Procedure deactivation. The EV kit is fully assembled and tested. Follow the steps Jumper JU2 demonstrates the ICs selectable turn-on- below to verify board operation. Caution: Do not turn on time feature for optimized click-and-pop performance. the power supply until all connections are completed. Connect TON to GND for a 10ms turn-on time. Connect 1) Verify that shunts are installed as follows: TON to VDD for a 100ms turn-on time. See Table 2 for JU1: Pins 2-3 (device enabled) selectable turn-on times. JU2: Pins 1-2 (turn-on time of 100ms) The MAX98310 has a preset 5ms turn-on time. JU3: Installed (single-ended input) Amplifier Gain 2) Connect the positive terminal of the power supply The EV kit provides resistors R1R4 to externally set the to the VDD PCB pad on the EV kit. Connect the differential gain. The default gain is 1V/V or 0dB. Set the negative terminal of the power supply to the GND gain of the amplifier as follows: PCB pad on the EV kit. R F A = 4) Verify that the audio source output is disabled. V R IN 5) Connect the single-ended mono audio source to the IN phono jack or between the IN+ and IN- PCB pads where A is the desired voltage gain, R is the value of V F on the EV kit. feedback resistors R2 and R4, and R is the value of IN input resistors R1 and R3. 6) Connect the speaker across the OUT+ and OUT- test pads. When evaluating the MAX98310, jumper JU2 controls the GAIN input pin and selects the four internally fixed 7) Set the power-supply output to 3.7V. differential gain options. See Table 2 for selectable gain 8) Enable the power-supply output. options. 9) Enable the audio source. Input Mode 10) Verify that the speaker is playing the audio source Jumper JU3 provides the option to select between a signal. differential or single-ended input mode for the EV kit. See Table 3 for jumper JU3 configurations. Detailed Description of Hardware The MAX98309 EV kit is a fully assembled and tested Table 1. Shutdown Mode (JU1) circuit board that evaluates the MAX98309 mono 1.4W Class AB audio amplifier. The amplifier gain can be set SHUNT DEVICE SHDN PIN through external resistors. POSITION OPERATION The EV kit can also evaluate the MAX98310 internally fixed 1-2 Connected to GND Disabled gain mono 1.4W Class AB audio amplifier. To evaluate 2-3* Connected to VDD Enabled the MAX98310, remove R2 and R4, and replace R1 and *Default position. R3 with 0I resistors. Maxim Integrated Products 2