MAX4090EVKIT+

19-4440; Rev 0; 1/09 MAX4090 Evaluation Kit Features The MAX4090 evaluation kit (EV kit) provides a proven design to evaluate the MAX4090 3V/5V, 6dB video buffer with sync-tip clamp. The MAX4090 video input terminals have a 75Ω termination resistor to ground, and the output terminals have a 75Ω back-termination resistor. The EV kit operates from a single 2.7V to 5V DC power supply. o Output Amplifiers with a +6dB Gain The MAX4090 EV kit uses the sag correction configuration. The video input and output signals on the EV kit are AC-coupled. o Standard 75Ω Input/Output Terminations The MAX4090 can also be used to drive DC-coupled, 150Ω back-terminated video loads in portable video applications. See the Output Signal section to use the MAX4090 as a DC-coupled output driver. The MAX4090 EV kit PCB comes with the MAX4090AAUT+ installed. The MAX4090 EV kit can also be used to evaluate the MAX4090EUT+. Contact the factory for free samples of the pin-compatible MAX4090EUT+ device. o Lead(Pb)-Free and RoHS Compliant o Single 2.7V to 5V Supply Operation o Jumper-Selectable Enable/Shutdown o AC-Coupled Inputs o DC- or AC-Coupled Outputs o Surface-Mount Components o Fully Assembled and Tested Ordering Information PART TYPE MAX4090EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY C1, C2 2 DESCRIPTION DESIGNATION QTY IN, OUT 2 JU1 1 3-pin header R1, R2 2 75Ω ±1% resistors (0603) 1 Video buffer with sync-tip clamp (6 SOT23) Maxim MAX4090AAUT+ 0.1µF ±10%, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104K DESCRIPTION 75Ω BNC female jacks C3, C4 2 22µF ±10%, 16V X5R ceramic capacitors (1210) Murata GRM32ER61C226K U1 C5 1 Not installed, capacitor (6.3mm x 6mm) — 1 Shunt — 1 MAX4090 Evaluation Kit+ C6 1 10µF ±10%, 6.3V X5R ceramic capacitor (0603) Murata GRM188R60J106K 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 MAX4090 when contacting these component suppliers. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX4090 General Description Evaluates: MAX4090 MAX4090 Evaluation Kit Quick Start Detailed Description of Hardware Recommended Equipment The MAX4090 evaluation kit (EV kit) provides a proven design to evaluate the MAX4090 3V/5V, 6dB video buffer with sync-tip clamp. The MAX4090 video input terminals have a 75Ω termination resistor to ground, and the output terminals have a 75Ω back-termination resistor. The MAX4090 EV kit uses the sag correction configuration. The video input and output signals on the EV kit are AC-coupled. The MAX4090 can also be used to drive DC-coupled, 150Ω back-terminated video loads in portable video applications. See the Output Signal section to use the MAX4090 as a DC-coupled output driver. • 5V, 50mA DC power supply (VCC) • Video signal generator (e.g., Tektronix TG-700 or similar) • Video measurement equipment (e.g., Tektronix VM700T or similar) Procedure The MAX4090 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Verify that a shunt is installed on jumper JU1 in the 1-2 position (MAX4090A enabled). 2) Connect the output of the video signal generator to the IN BNC connector on the MAX4090 EV kit. 3) Connect the OUT BNC connector on the EV kit to the input of the video measurement equipment. 4) Connect the power-supply ground to the GND pad on the EV kit. 5) Connect the 5V DC power supply to the VCC pad on the EV kit. 6) Set the video signal generator for the desired video input signal. 7) Turn on the power supply and enable the video signal generator. 8) Analyze the video output signal with the video measurement equipment. Output Signal By default, the MAX4090 EV kit is configured in the sag correction configuration and the output is AC-coupled. To DC-couple the outputs, short the C3 and C4 capacitors. To AC-couple the output without using the sag correction configuration, short the C3 and C4 capacitors, cut the short on C5, and install a 220µF capacitor on C5. Jumper Selection Shutdown Mode (SHDN) Jumper JU1 controls the shutdown pin (SHDN) of the MAX4090A IC. See Table 1 for shunt positions. Table 1. JU1 Jumper Selection (SHDN) SHUNT POSITION DESCRIPTION 1-2* SHDN pin connected to VCC MAX4090A enabled 2-3 SHDN pin connected to GND MAX4090A in shutdown mode *Default position. 2 _______________________________________________________________________________________ MAX4090 Evaluation Kit Evaluates: MAX4090 Figure 1. MAX4090 EV Kit Schematic _______________________________________________________________________________________ 3 Evaluates: MAX4090 MAX4090 Evaluation Kit Figure 2. MAX4090 EV Kit Component Placement Guide—Component Side 4 _______________________________________________________________________________________ MAX4090 Evaluation Kit Evaluates: MAX4090 Figure 3. MAX4090 EV Kit PCB Layout—Component Side _______________________________________________________________________________________ 5 Evaluates: MAX4090 MAX4090 Evaluation Kit Figure 4. MAX4090 EV Kit PCB Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.