MAX4278EVKIT-SO

MAX4278 Evaluation Kit ____________________________Features ♦ 310MHz -3dB Bandwidth ♦ 75Ω Terminated Input and Output ♦ Fully Assembled and Tested ______________Ordering Information PART MAX4278EVKIT-SO ____________________Component List DESIGNATION QTY TEMP. RANGE +25°C BOARD TYPE Surface Mount Note: To evaluate the MAX4178, request a MAX4178ESA free sample. DESCRIPTION U1 1 Maxim MAX4278ESA C1, C6 2 10µF, 10V, 20% tantalum capacitors AVX TAJB106M010 or Sprague 293D106X0010B C2, C5 2 0.1µF, 10% ceramic capacitors Vitramon VJ1206Y104KXX C3, C4 2 1000pF, 10% ceramic capacitors Vitramon VJ1206Y102KXX R1, R2 2 75Ω, 5% resistors RG 1 0Ω resistor IN, OUT 2 SMA connectors None 1 High-frequency amplifier PC board _________________________Quick Start The MAX4278 evaluation kit is fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power supply until all connections are completed. 1) The circuit requires supply voltages of ±5V. Connect the +5V supply to the V+ pad, and the -5V supply to the V- pad. Connect the power-supply ground to the pad marked GND. 2) Apply a signal of ±1.5V maximum to the SMA connector marked IN. 3) Connect the output marked OUT to an oscilloscope through a terminated 75Ω cable. 4) Turn on the power supply and verify the output signal on the oscilloscope. ______________Component Suppliers SUPPLIER AVX Sprague Vishay/Vitramon PHONE (803) 946-0690 (603) 224-1961 (203) 268-6261 FAX (803) 626-3123 (603) 224-1430 (203) 452-5670 ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. Evaluates: MAX4178/MAX4278 _______________General Description The MAX4278 evaluation kit (EV kit) simplifies evaluation of the MAX4178/MAX4278 330MHz/310MHz highspeed buffers. RF-style connectors (SMA) and 75Ω terminating resistors are included for video test equipment compatibility. The EV kit comes with the MAX4278 installed. To evaluate the MAX4178, simply order a free sample (MAX4178ESA) and replace the MAX4278 with the MAX4178. No other changes are necessary. Evaluates: MAX4178/MAX4278 MAX4278 Evaluation Kit _______________Detailed Description surface-mount ceramic capacitors are placed as close to the MAX4278 supply pins as possible. The N.C. pins (pins 1 and 5) are grounded to prevent unwanted noise from coupling into the circuit. Refer to the Grounding, Bypassing , and PC Board Layout section of the MAX4178/MAX4278 data sheet for further details. Shutdown Control Although the EV kit provides shutdown control circuitry (J1) for other amplifiers, the MAX4278 and MAX4178 do not have a shutdown feature. Therefore, pin 8 is not connected. Layout Considerations The MAX4278 EV kit layout is optimized for high-speed signals. Careful attention was given to grounding, power-supply bypassing, and signal path layout. Small, J1 V+ C1 10µF 10V SHDN* ENABLE 2 DISABLE 3 C2 0.1µF 8 3 IN 7 IN U1 R1 75Ω 2 6 MAX4278 GND 5 OUT R2 75Ω 1 4 RF OPEN C5 0.1µF GND C3 1000pF C4 1000pF RG 0Ω C6 10µF 10V V- * SHUTDOWN NOT APPLICABLE TO MAX4178/MAX4278 Figure 1. MAX4278 EV Kit Schematic 2 _______________________________________________________________________________________ MAX4278 Evaluation Kit Evaluates: MAX4178/MAX4278 Figure 2. MAX4278 EV Kit Component Placement Guide— Component Side Figure 3. MAX4278 EV Kit Component Placement Guide— Solder Side _______________________________________________________________________________________ 3 Evaluates: MAX4178/MAX4278 MAX4278 Evaluation Kit Figure 4. MAX4278 EV Kit PC Board Layout—Component Side Figure 5. MAX4278 EV Kit Board 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. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.