Evaluates: MAX4993 19-4495 Rev 0 2/09 MAX4993 Evaluation Kit General Description Features The MAX4993 evaluation kit (EV kit) demonstrates the Demonstrates Slow Turn-On for Built-In Click- MAX4993 double-pole/double-throw (DPDT) analog and-Pop Reduction switch featuring low on-resistance (0.3 R ) and slow ON Low 0.3 On-Resistance (R ) ON turn-on time for click-and-pop reduction in portable audio applications. The IC features a space-saving 0.004% THD+N in Audio Applications package, low THD+N (0.004%), and low supply current 1.8V to 5.5V DC Supply Operation (1.2A at 3V). The EV kit can operate from a 1.8V to 5.5V DC power supply and comes configured to oper- Demonstrates USB Power Operation ate from USB power. Lead(Pb)-Free and RoHS Compliant Fully Assembled and Tested Ordering Information PART TYPE MAX4993EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION JU1, JU2, JU3 3 3-pin headers 0.1F 10%, 16V X7R ceramic C1, C3, C4, 5 capacitors (0603) JU4, JU5 2 2-pin headers C5, C8 Murata GRM188R71C104K OUT 1 Stereo headphone jack (3.5mm) 10F 10%, 10V X7R ceramic R1R4 4 0 5% resistors (1206) C2 1 capacitor (0805) R5, R7 2 330 5% resistors (0603) Murata GRM21BR71A106K R6, R8 2 150 5% resistors (0603) 220F 10%, 6.3V low-ESR tantalum DPDT audio switch (10 UTQFN) C6, C7 2 capacitors (D size) U1 1 Maxim MAX4993EVB+ KEMET B45197A1227K409 (Top Mark: AAF) Not installed, ferrite-bead FB1 0 USB 1 USB type-B right-angle receptacle inductorshort (0603) 5 Shunts (JU1JU5) GND, OUTL, 0N ot ins tall ed , mi ni ature P C B test poi nts 1 PCB: MAX4993 Evaluation Kit+ OUTR Component Suppliers SUPPLIER PHONE WEBSITE KEMET Corp. 864-963-6300 www.kemet.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Note: Indicate that you are using the MAX4993 when contacting these 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.MAX4993 Evaluation Kit Quick Start Detailed Description of Hardware The MAX4993 evaluation kit (EV kit) demonstrates the Required Equipment MAX4993 DPDT analog switch in a 1.4mm x 1.8mm 10- User-supplied PC with a spare USB port pin ultra-thin QFN package specified for operating over A-to-B USB cable the -40C to +85C extended temperature range. The One stereo headphone ICs slow turn-on time provides click-and-pop reduction without additional parts in portable audio applications. Two audio signal sources ranging between 0 and 5V The IC features low 0.3 R resistance, low 0.004% ON THD+N distortion in audio applications, and demon- Procedure strates low supply current. An active-low output enable The MAX4993 EV kit is fully assembled and tested. Follow pin (EN) can set the switches to high-impedance mode. the steps below to verify board operation. Caution: Do The COM , NC 1, NC 2, NO 1, and NO 2 PCB pads not connect a signal to the NO 1, NO 2, NC 1, or can pass up to 350mA of continuous current through NC 2 PCB pads until power is supplied to VCC. the MAX4993 IC. The EV kit can operate from a 1.8V to 1) Connect the powered USB cable from the comput- 5.5V DC power supply and also comes configured to er to the EV kits USB receptacle. operate from USB power. 2) Verify that shunts are installed as follows: The user may install optional input resistors in place of JU1: Pins 1-2 (USB power to VCC) the default 0 resistors (R1R4). Resistor-divider pairs R5/R6 and R7/R8 and jumpers JU4 and JU5 provide JU2: Pins 1-2 (NO terminals selected) the ability to add a DC bias to the NO 1 and NO 2 PCB JU3: Pins 2-3 (switches enabled) pads for demonstrating the slow turn-on feature. JU4: Not installed (no input DC biasing on NO 1 Capacitors C6 and C7 provide DC voltage blocking for PCB pad) the OUT headphone jack signals. Test points OUTL, OUTR, and GND provide access to the OUT head- JU5: Not installed (no input DC biasing on NO 2 phone jack signals. PCB pad) 3) Verify that the stereo audio source outputs are dis- Power Supply abled. Jumper JU1 provides two options for powering the 4) Connect one audio sources right channel to the MAX4993 VCC supply input. VCC can operate from a user-supplied 1.8V to 5.5V DC power supply connected NO 1 PCB pad, the left channel to the NO 2 PCB across the VIN and GND PCB pads or from a 5V USB pad, and the audio ground return to the nearby power source. See Table 1 to configure the VCC supply GND PCB pad. options using jumper JU1. 5) Connect the other audio sources right channel to the NC 1 PCB pad, the left channel to the NC 2 PCB pad, and the audio ground return to the near- Table 1. Power Supply Configuration (JU1) by GND PCB pad. SHUNT VCC PIN 6) Plug the headphone into the OUT headphone jack. MAX4993 VCC POWER POSITION CONNECTION 7) Enable the audio sources. Connect a powered USB 8) Verify that the headphone is playing the audio cable to receptacle USB. 1-2* +5V bus source connected to the NO 1 and NO 2 PCB pads. VCC set to 5V USB power. 9) Move the jumper JU2 shunt to pins 2-3. User-provided DC power 2-3 VIN PCB pad supply. VCC range: 1.8V to 10) Verify that the headphone is playing the audio source 5.5V. connected to the NC 1 and NC 2 PCB pads. *Default position. 2 Evaluates: MAX4993