general description the max4410 evaluation kit (ev kit) is a fully assembled and tested surface-mount circuit board that evaluates the max4410 directdrive stereo headphone amplifier. directdrive eliminates the two large dc-blocking capaci- tors typically required between the output of the amplifier and the headphones. the max4410 ev kit is designed to be driven by the lineout of a cd player or directly con- nected to any stereo audio source. the max4410 ev kit includes rca jacks on the input and a 3.5mm headphone jack on the output to facilitate easy connections to the cir- cuit board. features no dc-blocking capacitors required 1.8v to 3.6v single-supply operation 80mw per channel into 16 ? 0.003% thd + n at 1khz low-profile (1.2mm max) design ultra-compact solution fully assembled and tested surface-mount board independent left/right shutdown controls evaluates: max4410 max4410 evaluation kit ________________________________________________________________ maxim integrated products 1 19-2500; rev. 0; 7/02 component list designation qty description a1 1 max4410ebe (16-pin ucsp) c1, c2 2 1.0? ?0%, 10v tantalum capacitors (r-case) avx tajr105m010r c3, c4 2 100pf 5%, 50v c0g ceramic capacitors (0402) tdk c1005c0g1h101j c5, c6, c7 3 2.2? ?0%, 6.3v x5r ceramic capacitors (0603) tdk c1608x5r0j225k taiyo yuden jmk107bj225ka c8 1 10? 20%, 6.3v x5r ceramic capacitor (0805) tdk c2012x5r0j106m taiyo yuden jmk212bj106mg designation qty description j1 1 phono jack (side-entry pc board mount) white j2 1 phono jack (side-entry pc board mount) red j3 1 stereo headphone jack (3.5mm dia.) ju1, ju2 2 3-pin headers r1 r4 4 10k ? 1% resistors (0402) none 2 shunts none 1 max4410 ev kit pc board none 1 max4410 ev kit data sheet none 1 max4410 data sheet u1 1 max4410eud (14-pin tssop) ordering information part temp range ic package MAX4410EVKIT 0 c to +70 c 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. note: a1 is for display purposes only (not a functional component). for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com.
evaluates: max4410 max4410 evaluation kit 2 _______________________________________________________________________________________ quick start recommended equipment one pair of 16 ? or 32 ? headphones one variable dc power supply capable of supplying between 1.8v and 3.6v at 300ma one stereo audio source 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 jack. 2) ensure that the stereo audio source is turned off. 3) connect the disabled stereo audio source through 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 vcc and gnd pads. 6) turn on the dc power supply. 7) enable the stereo audio source. detailed description the max4410 ev kit is a stereo, single-supply head- phone amplifier. the max4410 ev kit is designed to be driven by the stereo lineout of a cd player or directly connected to any stereo audio source. the input impedance is 10k ? . the -3db corner frequencies are approximately 16hz and 159khz and are dependent on components r1 r4 and c1 c4. 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. layout considerations to optimize the audio performance of the max4410, it is important to follow these layout guidelines. the max4410 ev kit uses two ground planes to minimize switching noise from the charge pump coupling into the audio signal. the two planes are star-connected at one point (gnd pad). capacitors c5, c6, and c7 should be placed close to the ic and connected with wide traces. short, wide traces should be used to connect the power pins of the ic to the power supply. table 1. shutdown selection jumper shunt position description 1-2 left channel enabled ju1 2-3 left channel disabled 1-2 right channel enabled ju2 2-3 right channel disabled ju1 ju2 1 2 3 1 2 3 figure 1. simultaneous shutdown control
evaluates: max4410 max4410 evaluation kit _______________________________________________________________________________________ 3 vcc gnd c1n sv ss pv ss sgnd inr outr outl inl pgnd sv dd pv dd c1p *c6 and c7 can be reduced in size. refer to the max4410 data sheet for details. tp3 tp1 tp2 u1 max4410 c4 100pf c3 100pf right in j2 8 1 left in j1 4 11 12 14 10 2 2 1 9 6 7 5 3 2 1 13 c1 1 f 10v r1 10k ? 1% r3 10k ? 1% r4 10k ? 1% 1 2 3 ju1 1 2 3 vcc vcc ju2 c6* 2.2 f shdnl shdnr shdn c7* 2.2 f c5 2.2 f c8 10 f c2 1 f 10v r2 10k ? 1% output j3 3 1 2 figure 2. max4410 ev kit schematic
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 4 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2002 maxim integrated products printed usa is a registered trademark of maxim integrated products. evaluates: max4410 max4410 evaluation kit figure 3. max4410 ev kit component placement guide component side figure 4. max4410 ev kit pc board layout?omponent side figure 5. max4410 ev kit pc board layout?older side
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