112 sy 20120301-s00001 no.a2050-1/5 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 la74309fa overview la74309fa is a microphone amplifier for digital still cameras that have mono audio recording. the analog signal processing for the recording of the digital still camera or ot her equipment can be easily composed, because the mic power supply and the alc circuit are built-in. mo reover, the regulator is bu ilt-in, therefore external re gulator ic is unnecessary. features ? microphone (mic) amplifier (+20db) ? mic power supply with built-in pull-up resistor ? automatic level control (alc) amplifier (output level=-1dbv 2.5vpp) ? 3rd order lpf (fc=11khz) ? 3v regulator (at the time of v cc =3.3v, internal supply voltage: v cc a 3.0v) ? standby control (i cc 10 a) specifications absolute maximum ratings at ta=25 c parameter symbol conditions ratings unit maximum power supply voltage v cc max 4.0 v allowable power dissipation pd max ta 85 c 50 mw operating temperature topr -20 to +85 c storage temperature tstg -55 to +150 c caution 1) absolute maximum ratings represent the va lue which cannot be exceeded for any length of time. caution 2) even when the device is used within the range of abso lute maximum ratings, as a result of continuous usage under hig h temperature, high current, high voltage, or drastic temperature change, the reliability of th e ic may be degraded. please contact us for the further detai ls. ordering number : ena2050 ordering number : ena2050 monolithic linear ic microphone amplifier for digital still camera stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above the recommended oper ating conditions is not implied. extended exposure to stresses above the recommended operating conditions may affect device reliabili ty.
la74309fa no.a2050-2/5 operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended power supply voltage v cc 3.3 v operating voltage range of v cc v cc op 3.1 to 3.6 v electrical characteristics at ta=25 c, v cc =3.3v, f=1khz parameter symbol conditions ratings unit min typ max circuit current v cc no signal current dissipation i cc v cc =3.3v, active mode (pin3=3v) 3.9 5.3 6.7 ma v cc standby current dissipation i cc s v cc =3.3v, standby mode (pin3=0v) 10 a rec output system standard rec output level vor v in =-49dbv at alc in pin (=standard level) -10 -9 -8 dbv standard rec output distortion hdr alc in, v in =-49dbv, thd from to 5th harmonic 0.1 0.2 % alc characteristics alm alc in, v in =-17dbv (=standard level +32db) -3 -1 dbv alc thd almd alc in, v in =-17dbv (=standard level +32db), thd from to 5th harmonic 0.25 1 % alc in maximum input level vinrmx rec output thd 3% -10 dbv rec output noise level vnor no signal at mic in pin, with jis-a filter -53 -47 dbv rec output frequency characteristics 1 feqr1 alc in, v in =-17dbv, the output level ratio at f=11khz/1khz -5 -3 -1 db rec output frequency characteristics 2 feqr2 alc in, v in =-17dbv, the output level ratio at f=22khz/1khz -18 -12 db rec output frequency characteristics 3 feqr3 alc in, v in =-17dbv, the output level ratio at f=100khz/1khz -55 -45 db mic output system mic voltage gain vgmic v in =-39dbv at mic in pin 19 20 21 db mic output thd hdmic mic in, v in =-39dbv, thd from to 5th harmonic 0.03 0.1 % mic in maximum input level vinmmx mic output thd=3% -30 dbv mic v cc output dc voltage vmic with 6.2k load 1.5 1.7 1.9 v package dimensions unit : mm (typ) 3428 sanyo : micro10 3.0 0.25 0.16 0.5 4.9 1.03 0.1 3.0 0.55 1 10 2
la74309fa no.a2050-3/5 pin assinment pin description pin no. pin description 1 gnd 2 alc input 3 standby ctl 4 mic output 5 mic input 6 ripple removal for vref 7 internal mic power supply 8 alc det 9 rec output 10 v cc equivalent circuit block diag ram & application circuit gnd 1 2 3 4 5 10 9 8 7 6 alc in standby l mic out mic in v cc rec out alc det int mic v cc vref la74309fa 2 7 8 alc mic v cc v cc a 3.0v v cc 3.3v det charge 6 lpf reg 3 4 5 1 9 10 vref mic mic in standby ctl gnd rec out - +
la74309fa no.a2050-4/5 pin functions pin no. pin name dc voltage ac volt age functions equivalent circuit 1 gnd 0v ground 2 alc in output level=-49dbv (at mic in=-69dbv) maximum input level =-10dbv v cc a (=3.0v) 2 vrefl 3 standby l standby control pin over 2v: standby off 3 4 mic out 1.60v output level=-49dbv (at mic in=-69dbv) mic output pin v cc a (=3.0v) 4 vrefl 5 mic in standard input level =-69dbv maximum input level =-30dbv mic input pin v cc a (=3.0v) 5 vrefl 6 vref 2.30v mic v cc and ripple rejection pin for vrefl v cc a (=3.0v) 6 7 int mic v cc 2.30v mic power supply pin v cc a (=3.0v) 7 continued on next page.
la74309fa no.a2050-5/5 continued from preceding page. pin no. pin name dc voltage ac volt age functions equivalent circuit 8 alc det alc detector pin v cc a (=3.0v) 8 9 rec out 1.60v output level=-9dbv (at mic in=-69dbv) rec output pin v cc (=3.3v) 9 vrefl 10 v cc 3.3v power supply pin ps on semiconductor and the on logo are registered trademarks of semiconductor components industries, llc (scillc). scillc owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. a listing of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent-marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc mak es no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability ar ising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s techn ical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorize d for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other appli cation in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of persona l injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture o fthe part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws a nd is not for resale in any manner.
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