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| 19-1150; Rev 0; 10/96 MAX498 Evaluation Kit _______________General Description The MAX498 evaluation kit (EV kit) simplifies evaluation of the MAX498 video switch. The evaluation board has a MAX498 in a 24-pin SO package, 12 SMA connectors, and surface-mount termination resistors. ____________________________Features o 250MHz Bandwidth o 70MHz 0.1dB Gain Flatness o 1250V/s Slew Rate o +6dB Gain o 3ns Channel-Switching Time o 12ns to 0.1% Settling Time Evaluates: MAX498 ____________________Component List DESIGNATION C1, C4 C2, C3, C5, C6 IN_A, IN_B, OUT_ R1-R8, R13-R16 U1 SW1 None None QTY 2 DESCRIPTION 10F, 10V, tantalum capacitors AVX TAJB106K010 or Sprague 293D106X0010B 0.1F ceramic capacitors Vishay/Vitramon VJ1206Y102KXX SMA connectors 49.9 surface-mount resistors MAX498CWI Two-position switch Printed circuit board MAX498 data sheet o Low Differential Phase/Gain Error: 0.06/0.03% ______________Ordering Information PART MAX498EVKIT-SO TEMP. RANGE 0C to +70C BOARD TYPE Surface Mount 4 12 12 1 1 1 1 _________________________Quick Start The MAX498 EV kit is fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power until all connections are completed. 1) Connect +5V, -5V, and ground to the pads marked VCC, VEE, and GND on the board. 2) Set switch SW1 to the desired output state, as shown in Table 1. For a detailed description of control-logic operation, see the Digital Interface section in the MAX498/MAX499 data sheet. 3) Connect the input video signals to the input connectors (IN0A-IN3A, IN0B-IN3B). 4) Connect an output to an oscilloscope through a terminated 50 cable. 5) Turn on the power supply, logic source, and video signal; verify the output signal on the oscilloscope. ______________Component Suppliers SUPPLIER AVX Sprague Vishay/Vitramon PHONE (803) 946-0690 (800) 282-4975 (603) 224-1961 (203) 268-6261 FAX (803) 626-3123 (603) 224-1430 (203) 452-5670 Table 1. Switching States A0 OUTPUT STATE EN Low* Low* High Low* High X Channel A selected, outputs enabled Channel B selected, outputs enabled Outputs disabled X = Don't Care * Internal pull-downs in the MAX498 ensure a logic-low state when the switch is left open. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 MAX498 Evaluation Kit Evaluates: MAX498 VCC C1 10F IN0A C2 0.1F 7 R1 49.9 IN1A R2 49.9 IN2A R3 49.9 IN3A R4 49.9 IN0B R5 49.9 IN1B R6 49.9 IN2B R7 49.9 IN3B R8 49.9 12 25 8 27 4 10 IN1B EN 26 SW1A EN 3 SW1B A0 IN2B A0 2 VCC 1 4 18 VCC 28 IN0A 22 VCC C3 0.1F 17 N.C. OUT0 23 R16 OUT0 49.9 R15 OUT1 49.9 R14 OUT2 49.9 R13 OUT3 49.9 2 IN1A OUT1 20 IN2A U1 MAX498 OUT2 6 IN3A OUT3 16 IN0B LE LE VCC 14 IN3B CS 24 CS 1 GND 3 GND 5 GND VEE 9 VEE 21 19 GND 13 GND 11 GND N.C. 15 C6 0.1F C5 0.1F VEE C4 10F 10V GND Figure 1. MAX498 EV Kit Schematic 2 _______________________________________________________________________________________ MAX498 Evaluation Kit Evaluates: MAX498 1.0" Figure 2. MAX498 EV Kit Component Placement Guide--Component Side (5/8x scale) _______________________________________________________________________________________ 3 MAX498 Evaluation Kit Evaluates: MAX498 1.0" 1.0" Figure 3. MAX498 EV Kit PC Board Layout--Component Side (5/8x scale) Figure 4. MAX498 EV Kit PC Board Layout--Solder Side (5/8x scale) 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 (c) 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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