unisonic technologies co., ltd l3305 linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2015 unisonic technologies co., ltd qw-r107-052.b low voltage class b amplifier ? description the utc l3305 can be operated as a class b amplifier. it can also operated as a medium power "vari-bias" class a amplifier. it include a preamplifier with adjustable gain and a power amplifier. ? features * low operating voltage range (1v 3v) * low operating current consumption * feedback stabilized gain less than 80 db * output power exceeds 140 dbspl ? ordering information ordering number package packing l3305g-s14-r sop-14 tape reel L3305G-P14-R tssop-14 tape reel l3305g-s14-r (1)packing type (2)package type (1) r: tape reel (2) s14: sop-14, p14: tssop-14 (3) g: halogen free and lead free (3)green package ? marking
l3305 linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r107-052.b ? pin configuration ? block diagram preamp 2.2k preamp i/p 470 ? output b current trim v cc2 v cc1 feedback preamp gnd preamp o/p output stage i/p dec b o/p gnd dec a output a mic bias output stage 3 12 14 11 4 13 2 1 8 7 6 9 10 5
l3305 linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r107-052.b ? absolute maximum ratings parameter symbol ratings unit supply voltage v cc 1 3 v power dissipation p d 200 mw operating temperature range t opr -10 ~ +60 storage temperature range t stg -20 ~ +70 note absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? electrical characteristics parameter symbol test conditions min typ max unit input referred noise en 0.9 2.5 v total current i tot 0.7 1.2 ma voltage gain g v output = 0.707 v rms 72 75 78 db total harmonic distortion & noise thd output = 0.707 v rms 1.5 3.0 % gain dependence on r b 0.02 db/ ? input impedance of output amplifier z in 18 27 36 k ? stable with battery resistance 22 ? low 250 hz frequency response (-3 db at 1 khz) high 12 khz notes: 1. all parameters test ed in test circuit fig. 1. 2. conditions: supply voltage v b = 1.3 v dc , temperature ambient = 25 , frequency = 1khz, noise filter bandwidth at 12 db/oct (0.2 to 10khz)
l3305 linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r107-052.b ? test curict 0.1 r b 4.7 v o r l = 470 v b = 1.30 v dc hammond 99966 utc l3305 n/c n/c 6 5 9 14 11 12 3 7 4 13 10 2 1 8 10 10 10 0.1 0.1 0.1 0.1 r in 3.9k r f 200k 220 1khz 20k v i 10 10 820 v c 10k note: 1. test circuit amplifier gain = 20 log 10 ( v out / v in ) + 40db fig. 1 test circuit 2. preamp gain = set at 35db r f r in
l3305 linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r107-052.b utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expec ted to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
|
