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19-1126; Rev 1; 3/97
MAX4135 Evaluation Kit
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 75 terminating resistors are included for video testequipment compatibility. 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. o 185MHz -3dB Bandwidth o Outputs Can Be Independently Enabled and Disabled o Fully Assembled and Tested
Features
Evaluates: MAX4135/MAX4136/MAX4137/MAX4138
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 75 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.
Ordering Information
PART MAX4135EVKIT-SO TEMP RANGE +25C BOARD TYPE Surface Mount
Note: Request free samples to evaluate the MAX4136EWG, MAX4137EWG, or MAX4138EWG.
____________________Component List
DESIGNATION QTY C2, C4, C5, C6 C1, C3 IN, OUT1-OUT6 R1, R2, R3, R4, R5, R6, R7 R8-R13 RG SW1 U1 None None 4 DESCRIPTION 0.1F, 10% ceramic capacitors Vitramon VJ1206Y104KXX 10F, 10V, 20% tantalum capacitors AVX TAJB106M010 Sprague 293D106X0010B SMA connectors 75, 5% resistors 100k, 5% resistors 0 resistor DIP switch MAX4135EWG MAX4135 PC board MAX4135/MAX4136 data sheet
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Detailed Description
7 7 6 1 1 1 1 1
Output Channel Selection
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 100k 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_.
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 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.
MAX4135 Evaluation Kit Evaluates: MAX4135/MAX4136/MAX4137/MAX4138
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 0 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 MAX4135 MAX4136 MAX4137 MAX4138 No. OF OUTPUTS 6 6 4 4 GAIN V/V Fixed at 2 2 Fixed at 2 2 RF Open User selected Open User selected 0 User selected 0 User selected 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 No. OF OUTPUTS 6 6 4 4 SW1 SWITCH SETTINGS SEL1 OUT1 OUT1 -- -- SEL2 OUT2 OUT2 OUT1 OUT1 SEL3 OUT3 OUT3 OUT2 OUT2 SEL4 OUT4 OUT4 OUT3 OUT3 SEL5 OUT5 OUT5 OUT4 OUT4 SEL6 OUT6 OUT6 -- --
MAX4135 MAX4136 MAX4137 MAX4138
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_______________________________________________________________________________________
MAX4135 Evaluation Kit Evaluates: MAX4135/MAX4136/MAX4137/MAX4138
VCC R8 100k 1 OUT1
R1 75 OUT1
U1 MAX4135
SEL1
24 VCC SW1-1 R9 100k
SEL1
2
VCC0
SEL2
23 SW1-2 VCC R10 100k
SEL2
R2 75 OUT2
3
OUT2
SEL3
22 SW1-3
SEL3
4
AGND
AGND
21 R7 75
R3 75 OUT3
5
OUT3
IN+
20 VEE C6 0.1F
IN
6 VEE C1 10F 10V R4 75 OUT4 C2 0.1F 7
VEE0
VEE1
19
VEE0
AGND
18 RF OPEN* RG 0* * AS SHIPPED, CONFIGURED FOR MAX4135
8
OUT4
N.C.
17
9
AGND
VCC1
16 C5 0.1F
VCC
VCC R11 100k
R5 75 OUT5
10
OUT5
SEL4
15 VCC SW1-4 R12 100k
SEL4
VCC C3 10F 10V R6 75 OUT6 C4 0.1F
11
VCC0
SEL5
14 SW1-5 VCC R13 100k
SEL5
12
OUT6
SEL6
13 SW1-6
SEL6
Figure 1. MAX4135 EV Kit Schematic _______________________________________________________________________________________ 3
MAX4135 Evaluation Kit Evaluates: MAX4135/MAX4136/MAX4137/MAX4138
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 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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