________________general description the max4104 evaluation kit (ev kit) simplifies evaluation of the max4104 ultra-high-speed, low-noise, 880mhz amplifier. the ev kit circuit demonstrates the max4104 in the noninverting unity-gain configuration. rf-style connectors (sma) and 50 terminating resistors are included for test equipment compatibility. the max4104 ev kit can also be used to evaluate the max4105, max4304, and max4305. simply order a free sample of the appropriate part (max4105esa, max4304esa, or max4305esa), replace the ic on the ev board, and change the gain-setting resistors for the desired gain. refer to the max4104/max4105/ max4304/max4305 data sheet for suggested resistor values. ____________________________features ? 880mhz (typical) -3db bandwidth ? 100mhz 0.1db gain flatness ? 2.1nv/ hz voltage noise density ? 400v/? slew rate ? ?0ma output current drive ? -88dbc sfdr (at 50mhz) ? fully assembled and tested surface-mount board evaluates: max4104/max4105/max4304/max4305 max4104 evaluation kit ________________________________________________________________ maxim integrated products 1 qty description c1, c3 2 c2, c4 2 in, out 2 sma connectors r1, r2 2 r f 1 22 , 5% resistor r g 0 u1 1 none 1 max4104 pc board none 1 max4104/max4105/max4304/ max4305 data sheet 49.9 , 1% resistors 0.1? 10% ceramic capacitors 10?, 10v, 20% tantalum capacitors avx tajb106m010 or sprague 293d106x0010b supplier phone fax avx 803-946-0690 803-626-3123 designation open max4104esa sprague 603-224-1961 603-224-1430 part MAX4104EVKIT -40? to +85? temp. range ic package 8 so for free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. for small orders, phone 1-800-865-8769. _________________________quick start the max4104 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 to ?.5v. for evaluation purposes, connect a +5v sup- ply to the pad labeled vcc and a -5v supply to the pad labeled vee. connect the power-supply grounds to the pad marked gnd. 2) connect the output marked out to an oscilloscope through a terminated 50 cable. 3) turn on the power supply. apply a signal of ?.4v maximum to the sma connector marked in. 4) verify the output signal on the oscilloscope. note: when using a 50 terminated oscilloscope input, the output amplitude observed on the oscillo- scope will be half that on the input, due to the volt- age divider formed by the 49.9 back-terminating resistor (r2) and the oscilloscope input termination impedance. _____________layout considerations the max4104 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 and c4 have been placed as close to the max4104 supply pins as possi- ble. a continuous ground plane has been maintained under the ic, r f , and r g to reduce inductance to the signal return path. capacitance at the inverting input pin has been minimized by reducing the feedback- trace length and using 0805-size surface-mount feed- back and gain-set resistors. note: please indicate that you are using the max4104 when contacting these component suppliers. ordering information component list component suppliers 19-4757; rev 3; 10/98
evaluates: max4104/max4105/max4304/max4305 max4104 evaluation kit 2 _______________________________________________________________________________________ max4104 n.c. 1 2 3 in vee 4 n.c. 8 r2 49.9 w 7 6 5 v cc out vcc c1 10 m f 10v c2 0.1 m f out in- r g open in+ r f 22 w c3 10 m f 10v c4 0.1 m f r1 49.9 w n.c. v ee figure 1. max4104 ev kit schematic
evaluates: max4104/max4105/max4304/max4305 max4104 evaluation kit _______________________________________________________________________________________ 3 1.0" figure 3. max4104 ev kit pc board layout?omponent side 1.0" figure 4. max4104 ev kit pc board layout?older side 1.0" figure 2. max4104 ev kit component placement guide component side
evaluates: max4104/max4105/max4304/max4305 max4104 evaluation kit maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it 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 1998 maxim integrated products printed usa is a registered trademark of maxim integrated products. notes
|
