unisonic technologies co., ltd pa3112 cmos ic www.unisonic.com.tw 1 of 8 copyright ? 2008 unisonic technologies co., ltd qw-r502-100,b dual 150mw audio power amplifier ? description the utc pa3112 is a dual audio power amplifier with differential inputs capable of delivering typically 150mw per channel of continuous average power to an 16 ? load with less than 0.1% thd+n using a 5v power supply. the unity-gain stable utc pa3112 can be configured by external gain-setting resistors. the utc pa3112 features an externally controlled, low-power consumption shutdown mode. the utc pa3112 exhibit a low quiescent current of typically 1. 5ma, allowing usage in portable applications. ? features * operating voltage range v dd =2.5v~5.5v * output power: -150mw @5v into 16 ? * differential inputs * shutdown mode available * low current consumption:3ma max * click and pop reduction circuitry * unity-gain stable * thermal and over-current protection msop-10 lead-free: pa3112l halogen-free: pa3112g ? ordering information ordering number normal lead free halogen free package packing pa3112-sm2-r PA3112L-SM2-R pa3112g-sm2-r msop-10 tape reel pa3112-sm2-t pa3112l-sm2-t pa3112g-sm2-t msop-10 tube
pa3112 cmos ic unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r502-100,b ? pin configuration ? pin description pin no pin name i/o description 4 bypass i connect to internal voltage divider. for best performance, a 0.1 f ~ 1 f low esr capacitor used. 5 gnd i ground 2 in1- i channel 1 negative input. 3 in1+ i channel 1 positive input. 8 in2- i channel 2 negative input. 7 in2+ i channel 2 positive input. 6 shutdown i low quiescent current mode enable. high active. 10 v dd i supply voltage. 1 v out 1 o channel 1 audio output. 9 v out 2 o channel 2 audio output.
pa3112 cmos ic unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r502-100,b ? absolute maximum ratings parameter symbol ratings unit supply voltage v dd 6 v input voltage v in -0.3~v dd ~+0.3 v continuous total power dissipation internally limited operating junction temperature t j -40 ~ +150 storage temperature t stg -65 ~ +150 note : absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating conditions parameter symbol min typ max unit supply voltage v dd 2.5 5.5 v high-level input voltage v ih , (shutdown) 0.6v dd v low-level input voltage v il , (shutdown) 0.25v dd v ? electrical characteristics (t a = 25 ) parameter symbol test conditions min typ max unit dc electrical characteristics output o ffset voltage v o(off) a v = 2 v/v, 15 mv v dd = 3.2 v ~ 3.4 v 83 power supply rejection ratio psrr v dd = 4.9 v ~ 5.1 v 76 db supply current i dd shutdown = 0 v, v dd = 2.5 ~ 5.5 v 1.5 3 ma supply current in shutdown mode i dd(sd) shutdown = v dd 10 50 a input impedance z in v dd = 2.5 ~ 5.5 v >1 m ? ac operating characteristics (v dd = 3.3v, r l = 16 ? ) output power (each channel) p out thd ? 0.1%, f = 1 khz 60 mw total harmonic distortion + noise thd+n p out = 40 mw, 20 - 20 khz 0.4% maximum output power bw b om g = 10, thd < 5% >20 khz phase margin open loop 96 supply ripple rejection ratio rr f = 1 khz 71 db channel/channel output separation f = 1 khz 89 db signal-to-noise ratio snr p out = 50 mw, a v = 1 100 db noise output voltage en a v = 1 11 v(rms) ac operating characteristics (v dd = 5v, r l = 16 ? ) output power (each channel) p out thd 0.1%, f = 1 khz 150 mw total harmonic distortion + noise thd+n p out = 100 mw, 20 - 20 khz 0.6% maximum output power bw b om g = 10, thd < 5% >20 khz phase margin open loop 96 supply ripple rejection ratio rr f = 1 khz 61 db channel/channel output separation f = 1 khz 90 db signal-to-noise ratio snr p out = 100 mw, a v = 1 100 db noise output voltage en a v = 1 11.7 v(rms)
pa3112 cmos ic unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r502-100,b ? electrical characteristics(cont.) parameter symbol test conditions min typ max unit ac operating characteristics (v dd = 3.3v, r l = 32 ? ) output power (each channel) p out thd 0.1%, f = 1 khz 40 mw total harmonic distortion + noise thd+n p out = 30 mw, 20 - 20 khz 0.4% maximum output power bw b om a v = 10, thd < 2% >20 khz phase margin open loop 96 supply ripple rejection ratio rr f = 1 khz 71 db channel/channel output separation f = 1 khz 95 db signal-to-noise ratio snr p out = 40 mw, a v = 1 100 db noise output voltage en a v = 1 11 v(rms) ac operating characteristics (v dd = 5v, r l = 32 ? ) output power (each channel) p out thd 0.1%, f = 1 khz 90 mw total harmonic distortion + noise thd+n p out = 60 mw, 20 - 20 khz 0.4% maximum output power bw b om a v = 10, thd < 2% >20 khz phase margin open loop 97 supply ripple rejection ratio rr f = 1 khz 61 db channel/channel output separation f = 1 khz 98 db signal-to-noise ratio snr p out = 90 mw, a v = 1 100 db noise output voltage en a v = 1 11.7 v(rms)
pa3112 cmos ic unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r502-100,b ? typical application circuit
pa3112 cmos ic unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r502-100,b ? typical characteristics thd+n ? total harmonic distortion + noise - % thd+n ? total harmonic distortion + noise - % thd+n ? total harmonic distortion + noise - % thd+n ? total harmonic distortion + noise - % figure 5. supply ripple rejection ratio vs frequency frequency, f (hz) 10k 1k 20 -90 -30 0 100 20k -120 -60 v dd = 5 v, r l = 16 , a v =-1v/v -110 -100 -80 -70 -50 -40 -20 -10 bypass=2.5v 1f 0 .4 7 f 0.1f figure 6. output noise voltage vs frequency frequency, f (hz) 10k 1k 20 100 100 20k 1 10 v dd = 5 v, b w = 10 hz ~ 22khz r l = 16 , a v =-1v/v a v =-10v/v
pa3112 cmos ic unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r502-100,b ? typical characteristics(cont.) figure 7. crosstalk vs frequency frequency, f (hz) 10k 1k 20 0.01 1 10 a v = - 5 v / v a v = - 1 v / v a v = - 1 0 v / v 100 20k 0.001 0.1 v dd = 5 v, p o = 150 mw, c b = 1 f, r l = 8 figure 8. crosstalk vs frequency frequency, f (hz) 10k 1k 20 -90 -30 0 100 20k -120 -60 v dd = 5 v, p o =150mw c b =1f, r l = 8 , a v =-1v/v -110 -100 -80 -70 -50 -40 -20 -10 in1-~v out 2 in2-~v out 1 shutdown attenuation (db) thd + n (%) output power, p o (mw) supply current, i dd (ma)
pa3112 cmos ic unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r502-100,b ? typical characteristics(cont.) figure 13. signal-to-noise ratio vs voltage gain signal-to-noise ratio, snr (db) voltage gain, a v (v/v) 6 1 120 0 20 40 80 100 v dd =5v 2345 78910 60 figure 14. power di sssipation/amplifier vs load power power dissipation/amplifier (mw) load power (mw) 100 0 120 0 20 40 80 100 v dd =5v 20 40 60 80 140160180200 60 120 140 160 180 16 32 64 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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