general description the max4060 evaluation kit (ev kit) is a fully assembled and tested circuit board used to evaluate the max4060 low-noise microphone amplifier. the max4060 contains a differential input amplifier typically used for an internal microphone and a single-ended auxiliary-input amplifier used for an external microphone. both amplifiers have an internally set fixed gain of 10v/v. the max4060 ev kit also provides a bias voltage for powering microphones, compliant with the pc99/2001 specification. the max4060 ev kit has low quiescent current and high power-supply rejection. the max4060 is available in 8-pin qfn and ?ax packages. the max4060 ev kit uses the smaller 8-pin qfn package. features 4.5v to 5.5v single-supply operation low 0.75ma supply current high 86db psrr at 1khz single-ended and differential inputs pc99/2001 compliant low-noise microphone bias voltage small 8-pin qfn package (3mm x 3mm) fully assembled and tested quick start the max4060 ev kit is fully assembled and tested. follow the steps listed below to verify board operation. do not turn on the power supply until all connec- tions are completed. recommended equipment 5v, 100ma power supply function generator oscilloscope equipment setup 1) set the power supply to 5v. 2) set the function generator? output for a sine wave with 0.2v p-p , 100hz frequency, and 0 offset. 3) turn off the power supply and function generator. evaluates: max4060 max4060 evaluation kit ________________________________________________________________ maxim integrated products 1 19-2513; rev 0; 7/02 component list for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information component suppliers part temp range ic package MAX4060EVKIT 0 c to +70 c 8 qfn designation qty description c1 1 0.1f 10%, 16v x7r ceramic capacitor (0603) tdk c1608x7r1c104k c2 1 10f 20%, 6.3v x5r ceramic capacitor (0805) tdk c2012x5r0j106mt c3, c4, c5 3 1f 10%, 10v x5r ceramic capacitors (0603) tdk c1608x5r1a105kt c6 1 1f 10%, 6.3v tantalum capacitor (0603) avx tacl105k006r aux_in 1 3.5mm stereo jack out 1 non-switched, pc-mount jack, red r1 1 100k ? 5% resistor (0603) ju1 1 3-pin header none 1 shunt (ju1) none 1 max4060 pc board none 1 max4060 max4063 data sheet none 1 max4060 ev kit data sheet u1 1 max4060ega (8-pin qfn) supplier phone fax website avx 843-946-0238 843-626-3123 www.avxcorp.com tdk 847-803-6100 847-390-4405 www.component.tdk.com note: please indicate that you are using the max4060 when contacting these component suppliers.
evaluates: max4060 quick test 1) install a shunt across pins 1 and 2 of jumper ju1 ( int/ aux). 2) connect the output of the function generator to the aux_in pad on the max4060 ev kit and the ground lead of the function generator to the gnd pad. 3) connect the 5v terminal of the power supply to the vcc pad and the ground terminal of the power supply to the gnd pad. 4) turn on the power supply and then the function generator. 5) using the oscilloscope, verify that the signal at the out pad is 2v p-p . 6) move the shunt on ju1 to pins 2 and 3. 7) move the output of the function generator to the in+ pad on the max4060 ev kit and the ground lead of the function generator to the in- pad. 8) using the oscilloscope, verify that the signal at the out pad is 2v p-p . detailed description the max4060 ev kit evaluates the max4060 which contains two low-noise amplifiers: a differential amplifier typically used for amplifying an internal microphone and an auxiliary single-ended amplifier typically used for amplifying an external microphone. the max4060 ev kit operates from a 4.5v to 5.5v supply and provides a dc biasing voltage with an internal, 2.5k ? resistor to power a microphone. this dc biasing voltage is pc99/2001 compliant. the two amplifiers within the max4060 have an internally set fixed gain of 10v/v. jumper selection input mode jumper ju1 provides an option to select between sin- gle-ended mode (aux) and differential mode ( int ) inputs. the input mode ( int /aux) can also be con- trolled by an external controller connected to the ( int /aux) pad after removing the shunt on jumper ju1 (see table 1 for shunt positions). max4060 evaluation kit 2 _______________________________________________________________________________________ gnd aux_in bias in+ in- aux_in 3 1 2 c5 1 f c4 1 f c3 1 f in- 6 in+ 5 bias 3 aux_in 8 1 2 out 7 gnd 4 v cc int/aux int/aux* u1 max4060 gnd out out gnd vcc 1 2 c1 0.1 f c2 10 f c6 1 f r1 100k ? vcc ju1 1 2 3 *the int/aux pad on the schematic is the same as the aux/int pad on the ev kit. figure 1. max4060 ev kit schematic table 1. ju1 jumper selection shunt position int /aux pin ev kit input 1-2 (aux) pulled up to v cc single ended 2-3 ( int ) pulled down to gnd differential none. external controller connected to int /aux pad driven by external source driven by external source
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. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 _____________________ 3 ? 2002 maxim integrated products printed usa is a registered trademark of maxim integrated products. evaluates: max4060 max4060 evaluation kit figure 2. max4060 ev kit component placement guide component side figure 3. max4060 ev kit pc board layout?omponent side figure 4. max4060 ev kit pc board layout?older side note: the aux/ int pad on the max4060 ev kit connects to the int /aux pin on the device.
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