unisonic technologies co., ltd um2750 preliminary linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2012 unisonic technologies co., ltd qw-r109-031. a 4 input/1 output stereo audio selector ? description the utc um2750 is a stereo audio selector with 4 inputs and 1 output. based upon the inner op-amp switch technology, the utc um2750 features higher channel separation, lower output noise and lower distortion than the common multiplexers or analogue switches. the utc um2750 can be applied to many kinds of audio devices, such as car stereo, tv, mini music center and so on. ? features * dual channel for stereo use * 4.7~13v operating voltage * 4 input /1 output audio selectors * bipolar technology * low output noise: -110dbv typ. * low distortion: 0.005% typ. ? ordering information ordering number package packing lead free halogen free um2750l-s16-r UM2750G-S16-R sop-16 tape reel um2750l-s16-t um2750g-s16-t sop-16 tube
um2750 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r109-031. a ? pin configuration 1 16 gnd outa v+ in3a v ref outb (n.c.) in3b in1a cnt1 in2a cnt2 in4a in1b in2b in4b 15 14 13 12 11 10 9 2 3 4 5 6 7 8 ? pin description pin no. pin name description 1 in1a ach input 1 2 cnt1 select control 1 3 in2a ach input 2 4 cnt2 select control 2 5 in4a ach input 4 6 in1b bch input 1 7 in2b bch input 2 8 in4b bch input 4 9 in3b bch input 3 10 (n.c.) no connect 11 outb bch output 12 v ref reference voltage 13 in3a ach input 3 14 v+ supply voltage 15 outa ach output 16 gnd ground
um2750 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r109-031. a ? block diagram logic circuit gnd outa v+ in3a v ref outb (n.c.) in3b in1a cnt1 in2a cnt2 in4a in1b in2b in4b v+ bias 1 2 3 4 5 6 7 8 16 15 15 14 13 12 11 10 9
um2750 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r109-031. a ? absolute maximum rating (t a =25c, unless otherwise specified) parameter symbol ratings unit supply voltage v+ 15 v power dissipation p d 300 mw operating temperature t opr -40 ~ +85 c storage temperature t str -40 ~ +150 c 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 (t a =25c, v + =9v, unless otherwise specified) parameter symbol test conditions min typ max unit operating voltage v + 4.7 9.0 13.0 v supply current i cc no signal 10 20 ma reference voltage v ref 4.5 v voltage gain g v v in =1v rms , f=1khz -1 0 1 db total harmonic distortion thd+n v in =1v rms , f=1khz 0.005 0.05 % output noise voltage v no a-weighted -110 -100 dbv 3 10 v rms maximum output voltage v om f=1khz, thd=1% 6 8 dbv 2.0 2.5 v rms cross talk ct v in =1v rms , f=1khz, a-weighted 70 90 db channel separation cs v in =1v rms , f=1khz, a-weighted 70 90 db switch-on voltage level v ch 2.4 v switch-off voltage level v cl 0.8 v ? switch control logic cnt1 cnt2 input selector ach/bch l l in1 l h in2 h l in3 h h in4
um2750 preliminary linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r109-031. a ? typical application circuit 16 15 14 13 12 11 10 9 2 3 4 5 6 7 8 gnd outa v+ in3a v ref outb (n.c.) in3b in1a cnt1 in2a cnt2 in4a in1b in2b in4b 10k 10k 100k 4.7f 100f 4.7f 100k 0.1f 9v 10f 0.1f 0.1f 0.1f 0.1f 0.1f 0.1f 0.1f 10f 1 10f 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 expected 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.
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