Evaluates: MAX4410 19-2500 Rev. 0 7/02 MAX4410 Evaluation Kit General Description Features The MAX4410 evaluation kit (EV kit) is a fully assembled No DC-Blocking Capacitors Required and tested surface-mount circuit board that evaluates the 1.8V to 3.6V Single-Supply Operation MAX4410 DirectDrive stereo headphone amplifier. DirectDrive eliminates the two large DC-blocking capaci- 80mW Per Channel into 16 tors typically required between the output of the amplifier 0.003% THD + N at 1kHz and the headphones. The MAX4410 EV kit is designed to be driven by the lineout of a CD player or directly con- Low-Profile (1.2mm max) Design nected to any stereo audio source. The MAX4410 EV kit Ultra-Compact Solution includes RCA jacks on the input and a 3.5mm headphone Fully Assembled and Tested Surface-Mount jack on the output to facilitate easy connections to the cir- cuit board. Board Independent Left/Right Shutdown Controls Ordering Information PART TEMP RANGE IC PACKAGE MAX4410EVKIT 0C to +70C 14 TSSOP Component Suppliers SUPPLIER PHONE FAX WEBSITE AVX 843-946-0238 843-626-3123 www.avxcorp.com Taiyo Yuden 800-348-2496 847-925-0899 www.t-yuden.com TDK 847-803-6100 847-390-4405 www.component.tdk.com Note: Please indicate that you are using the MAX4410 when contacting these component suppliers. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION A1 1 MAX4410EBE (16-pin UCSP) Phono jack (side-entry PC board J1 1 mount) white 1.0F 20%, 10V tantalum capacitors (R-Case) C1, C2 2 Phono jack (side-entry PC board J2 1 AVX TAJR105M010R mount) red J3 1 Stereo headphone jack (3.5mm dia.) 100pF 5%, 50V C0G ceramic C3, C4 2 capacitors (0402) JU1, JU2 2 3-pin headers TDK C1005C0G1H101J R1R4 4 10k 1% resistors (0402) None 2 Shunts 2.2F 10%, 6.3V X5R ceramic None 1 MAX4410 EV kit PC board capacitors (0603) C5, C6, C7 3 TDK C1608X5R0J225K None 1 MAX4410 EV kit data sheet Taiyo Yuden JMK107BJ225KA None 1 MAX4410 data sheet U1 1 MAX4410EUD (14-pin TSSOP) 10F 20%, 6.3V X5R ceramic capacitor (0805) Note: A1 is for display purposes only (not a functional component). C8 1 TDK C2012X5R0J106M Taiyo Yuden JMK212BJ106MG Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX4410 Evaluation Kit Quick Start Table 1. Shutdown Selection Recommended Equipment SHUNT JUMPER DESCRIPTION POSITION One pair of 16 or 32 headphones 1-2 Left channel enabled One variable DC power supply capable of supplying JU1 between 1.8V and 3.6V at 300mA 2-3 Left channel disabled 1-2 Right channel enabled One stereo audio source JU2 2-3 Right channel disabled Procedure The MAX4410 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: 1) Plug the headphones into the 3.5mm headphone JU1 JU2 jack. 1 1 2) Ensure that the stereo audio source is turned off. 2 2 3) Connect the disabled stereo audio source through 3 3 the RCA phono jacks. 4) Ensure that shunts JU1 and JU2 are installed in posi- tion 1-2. 5) Connect the 1.8V to 3.6V DC power supply to the Figure 1. Simultaneous Shutdown Control VCC and GND pads. Layout Considerations 6) Turn on the DC power supply. To optimize the audio performance of the MAX4410, it 7) Enable the stereo audio source. is important to follow these layout guidelines. The MAX4410 EV kit uses two ground planes to minimize Detailed Description switching noise from the charge pump coupling into the The MAX4410 EV kit is a stereo, single-supply head- audio signal. The two planes are star-connected at one phone amplifier. The MAX4410 EV kit is designed to be point (GND pad). Capacitors C5, C6, and C7 should be driven by the stereo lineout of a CD player or directly placed close to the IC and connected with wide traces. connected to any stereo audio source. The input Short, wide traces should be used to connect the impedance is 10k . The -3dB corner frequencies are power pins of the IC to the power supply. approximately 16Hz and 159kHz and are dependent on components R1R4 and C1C4. The MAX4410 EV kit has a gain of -1 and can be powered with a 1.8V to 3.6V supply. Shutdown Control The MAX4410 EV kit provides two shutdown pins (SHDNL, SHDNR) to disable the outputs. Jumpers JU1 and JU2 control the left and right channels, respectively (see Table 1 for shutdown shunt positions). Shorting pin 2 of JU1 to pin 2 of JU2 allows the user to control both channels shutdown pins simultaneously by driving the provided user pad SHDN with an external source (see Figure 1 for shunt configuration). SHDNL and SHDNR are CMOS logic-level inputs. 2 Evaluates: MAX4410