19-1126; Rev 1; 3/97 MAX4135 Evaluation Kit The EV kit comes with the MAX4135 installed, but can also be used to evaluate the MAX4136, MAX4137, and MAX4138 video distribution amplifiers. Contact Maxim to order free samples. Ordering Information PART MAX4135EVKIT-SO TEMP RANGE +25°C BOARD TYPE Surface Mount Note: Request free samples to evaluate the MAX4136EWG, MAX4137EWG, or MAX4138EWG. ____________________Component List DESIGNATION QTY DESCRIPTION C2, C4, C5, C6 4 0.1µF, 10% ceramic capacitors Vitramon VJ1206Y104KXX C1, C3 2 10µF, 10V, 20% tantalum capacitors AVX TAJB106M010 Sprague 293D106X0010B IN, OUT1–OUT6 7 SMA connectors ♦ 185MHz -3dB Bandwidth ♦ Outputs Can Be Independently Enabled and Disabled ♦ Fully Assembled and Tested Quick Start The MAX4135 EV 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 a +5V supply to the pad marked VCC. Connect a -5V supply to the pad marked VEE. Connect the power-supply ground to the pad marked GND. 2) Apply a signal in the +1.1V to -1.0V range to the SMA connector marked IN. 3) Connect the output marked OUT1 to an oscilloscope through a terminated 75Ω cable. 4) On DIP switch SW1, set the SEL1 switch to the on position. Set all other switches to off. 5) Turn on the power supply and verify the output signal on the oscilloscope. Detailed Description R1, R2, R3, R4, R5, R6, R7 7 75Ω, 5% resistors R8–R13 6 100kΩ, 5% resistors RG 1 0Ω resistor SW1 1 DIP switch Output Channel Selection U1 1 MAX4135EWG None 1 MAX4135 PC board None 1 MAX4135/MAX4136 data sheet Component Suppliers SUPPLIER Features PHONE FAX AVX 803-946-0690 803-626-3123 Sprague 603-224-1961 603-224-1430 Vishay/Vitramon 203-268-6261 203-452-5670 The MAX4135 provides TTL/CMOS-compatible, digital control pins (SEL1–SEL6) to enable or disable each amplifier output. When the SEL_ input is low, the amplifier is enabled; when it is high, the amplifier is disabled. The EV kit uses a DIP switch (SW1) to manually enable/disable outputs. When a switch is on, the SEL_ pin is connected to ground, and the corresponding amplifier is enabled. When a switch is off, the SEL_ pin is connected to +5V through a 100kΩ pull-up resistor, and the corresponding amplifier is disabled. To use an external controller, set the desired SEL_ switch(es) to on and connect the external controller to the pad(s) labeled SEL_. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX4135/MAX4136/MAX4137/MAX4138 General Description The MAX4135 evaluation kit (EV kit) simplifies evaluation of the MAX4135 one-input, six-output distribution amplifier. The EV kit circuit demonstrates the MAX4135 in a fixed gain of 2V/V. RF-style connectors (SMA) and 75Ω terminating resistors are included for video testequipment compatibility. Evaluates: MAX4135/MAX4136/MAX4137/MAX4138 MAX4135 Evaluation Kit MAX4136, MAX4137, MAX4138 Configuration The MAX4135 EV kit can easily be configured to evaluate the MAX4136, MAX4137, or MAX4138. The primary differences between the four parts are the number of output channels (four or six), and either fixed (2V/V) or adjustable gain (≥2V/V). Refer to Table 1 and to the MAX4135/MAX4136 and MAX4137/MAX4138 data sheets for further information. Evaluating the MAX4136 To evaluate the MAX4136, simply order a free sample (MAX4136EWG), replace the MAX4135 with the MAX4136 on the PC board, and select and install the gain-setting resistors for the desired gain. Evaluating the MAX4137 To evaluate the MAX4137, order a free sample (MAX4137EWG) and replace the MAX4135 with the MAX4137 on the PC board. Keep the 0Ω resistor in RG and leave RF open. Note that the four output channels correspond to those labeled OUT2–OUT5, and are selected via SEL2–SEL5 on SW1 (see Table 2). Evaluating the MAX4138 To evaluate the MAX4138, simply order a free sample (MAX4138EWG), replace the MAX4135 with the MAX4138 on the PC board, and select and install the gain-setting resistors for the desired gain. Note that the four output channels correspond to those labeled OUT2–OUT5, and are selected via SEL2–SEL5 on SW1 (see Table 2). Table 1. Gain Configuration PART No. OF OUTPUTS GAIN V/V MAX4135 6 Fixed at 2 Open 0Ω MAX4136 6 ≥2 User selected User selected MAX4137 4 Fixed at 2 Open 0Ω MAX4138 4 ≥2 User selected User selected RF RG Layout Considerations The MAX4135 EV kit layout has been optimized for high-speed signals and low distortion, with careful attention given to grounding, power-supply bypassing, and signal-path layout. The small, surface-mount, ceramic bypass capacitors (C2, C4, C5, and C6) have been placed as close to the four MAX4135 supply pins as possible. The ground plane has been removed around and under the MAX4135 to reduce stray capacitance. The removal of ground plane around the input SMA connector reduces distortion. Table 2. Output Channel Selection PART 2 No. OF OUTPUTS SW1 SWITCH SETTINGS SEL1 SEL2 SEL3 SEL4 SEL5 SEL6 MAX4135 6 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 MAX4136 6 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 MAX4137 4 — OUT1 OUT2 OUT3 OUT4 — MAX4138 4 — OUT1 OUT2 OUT3 OUT4 — _______________________________________________________________________________________ MAX4135 Evaluation Kit Evaluates: MAX4135/MAX4136/MAX4137/MAX4138 VCC R8 100kΩ R1 75Ω 1 OUT1 OUT1 U1 SEL1 24 SEL1 VCC SW1-1 MAX4135 R9 100kΩ 2 VCC0 SEL2 SEL2 23 VCC SW1-2 R10 100kΩ R2 75Ω 3 OUT2 OUT2 SEL3 22 SEL3 SW1-3 4 AGND AGND 21 R7 75Ω R3 75Ω 5 OUT3 6 OUT3 IN+ VEE0 VEE1 20 IN VEE 19 C6 0.1µF VEE C1 10µF 10V C2 0.1µF 7 VEE0 AGND 18 RG 0Ω* RF OPEN* R4 75Ω 8 OUT4 9 OUT4 N.C. AGND VCC1 17 * AS SHIPPED, CONFIGURED FOR MAX4135 VCC 16 VCC C5 0.1µF R5 75Ω 10 OUT5 OUT5 SEL4 R11 100kΩ 15 SEL4 VCC SW1-4 R12 100kΩ VCC 11 C3 10µF 10V VCC0 SEL5 C4 0.1µF R6 75Ω OUT6 SEL5 14 SW1-5 VCC R13 100kΩ 12 OUT6 SEL6 13 SEL6 SW1-6 Figure 1. MAX4135 EV Kit Schematic _______________________________________________________________________________________ 3 Evaluates: MAX4135/MAX4136/MAX4137/MAX4138 MAX4135 Evaluation Kit Figure 2. MAX4135 EV Kit Component Placement Guide— Component Side Figure 3. MAX4135 EV Kit PC Board Layout—Component Side Figure 4. MAX4135 EV Kit PC 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.