for free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 ________________ general description the max4112 evaluation kit (ev kit) simplifies evalua- tion of the max4112 high-speed amplifier. the ev kit circuit demonstrates the max4112 in the noninverting configuration, set to a gain of 2v/v. the ev kit comes with the max4112 installed. to evalu- ate the max4113, simply order a free sample (max4113esa), replace the max4112 with the max4113 on the ev board, and change the gain- setting resistor for the desired gain. the minimum closed-loop gain for the max4113 is 8v/v. ____________________________features ? 500mhz unity-gain bandwidth ? optional adjustable gain ? fully assembled and tested ______________________________ quick start the max4112 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 ?v. connect these supplies to the corresponding pads marked v+ and v-. connect the power-supply ground to the pad marked gnd. 2) apply a signal no greater than ?.75v pk (11.8dbm) to the sma connector marked in. 3) connect the output marked out to an oscilloscope through a terminated 50 cable. 4) turn on the power supply and verify the output signal on the oscilloscope. evaluates: max4112/max4113 max4112 evaluation kit ________________________________________________________________ maxim integrated products 1 19-0488; rev 1; 1/97 part temp. range board type MAX4112EVKIT-so +25? surface mount qty description u1 1 c1, c2 2 c3, c4 2 0.1?, 10% ceramic capacitors vitramon vj1206y104kxx c5, c6 2 r1, r2 2 49.9 , 1% resistors r f, r g 2 in, out 2 none 1 max4112/max4113 data sheet 1000pf, 10% ceramic capacitors vitramon vj1206y102kxx 10?, 10v, 20% tantalum capacitors avx tajb106m010 or sprague 293d106x0010b maxim max4112esa supplier phone fax avx sprague vishay/vitramon (803) 946-0690 (603) 224-1961 (203) 268-6261 (803) 626-3123 (603) 224-1430 (203) 452-5670 ______________component suppliers designation 499 , 1% resistors sma connectors ____________________component list _______________or dering information note: to evaluate the max4113, request a max4113esa free sample.
_______________detailed description voltage-gain adjustment the max4112? gain can be adjusted with the following minor modifications to the ev board: 1) referring to the section choosing feedback and gain resistors in the max4112/max4113 data sheet, select the gain-setting resistor (r g ) for the desired gain. 2) install r g . layout considerations the max4112 ev kit layout has been optimized for high-speed signals, with careful attention given to grounding, power-supply bypassing, and signal-path layout. the small, surface-mount, ceramic bypass capacitors c3?6 have been placed close to the max4112 supply pins. the unused pins have been grounded to prevent unwanted noise from coupling into the circuit. the best performance from the max4112 was obtained using high-speed design techniques. refer to the layout and power-supply bypassing sec- tion of the max4112/max4113 data sheet for details. evaluates: max4112/max4113 max4112 evaluation kit 2 _______________________________________________________________________________________ max4112 u1 r2
49.9 w r f
499 w r g
499 w r 1
49.9 w out v- v+ gnd in 1 3 2 8 5 4 6 7 c4
0.1? c6
1000pf c5
1000pf c3
0.1? c2
10?, 10v c1
10?, 10v figure 1. max4112 ev kit schematic
evaluates: max4112/max4113 max4112 evaluation kit _______________________________________________________________________________________ 3 figure 2. max4112 ev kit component placement guide component side figure 3. max4112 ev kit component placement guide 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. evaluates: max4112/max4113 max4112 evaluation kit figure 4. max4112 ev kit pc board layout?omponent side figure 5. max4112 ev kit pc board layout?older side
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