ver: 1.5 sep 30, 2009 tel: 886-3-5788833 http://www.gmt.com.tw 1 G1412 global mixed-mode technology inc. ground-reference popless stereo headphone driver features ? 7ma quiescent current. ? ground-referenced outputs eliminate dc-bias voltages on headphone ground pin ? popless function embedded ? 70mw per channel into 16 loads ? low distortion ? large output voltage swing. ? 1.8v to 3.6v dual power operating range ? low power consumption. ? over-temperature protection ? uvlo embedded ? tdfn2x2-8 &tqfn3x3-16 packages applications ? cellular phone ? notebooks ? pdas ? mp3 players ? portable audio equipment general description the G1412 stereo headphone driver is designed for portable equipment where board space is limited. the G1412 uses the dual external power supplies pvdd/nvdd to produce a ground-reference output, eliminating the need for large dc-blocking capacitors, saving cost, board space, and component height. the G1412 is a dual channel, low voltage, low power, and high performance amplifiers, which can deliver up to 70mw per channel into a 16 load with small thd+n performance. the G1412 operates from a dual 1.8v to 3.6v sup- plies, consumes only 7ma of supply current. with ex- cellent ac performance (small thd), it can be designed into a wide range of headphone driving application. ordering information order number marking temp. range package (green) remark G1412rc1u 1412 -40 c ~ +85 c tdfn2x2-8 G1412r41u 1412 -40 c ~ +85 c tqfn3x3-16 obsolete note: rc :tdfn2x2-8 r4:tqfn3x3-16 1: bonding code u: tape & reel pin configuration typical application circuit + + left audio input right audio input left audio output right audio output nvdd r i r f r i r f gain = - ( ) r f r i tdfn2x2-8 1 2 3 4 8 7 6 5 G1412 outl pgnd nvdd outr inr shdn inl pvdd thermal pad G1412 tqfn3x3-16 inl nc 1 2 3 4 shdnr 12 11 10 9 nc nc 16 15 14 13 shdnl nc pgnd pvdd 5 6 7 8 inr outl svss outr sgnd svdd thermal pad note: recommend connecting the thermal pad to the ground for excellent power dissipation. + + left audio input right audio input left audio output right audio output nvdd r i r f r i r f gain = - ( ) r f r i tdfn2x2-8 1 2 3 4 8 7 6 5 G1412 outl pgnd nvdd outr inr shdn inl pvdd thermal pad G1412 tqfn3x3-16 inl nc 1 2 3 4 shdnr 12 11 10 9 nc nc 16 15 14 13 shdnl nc pgnd pvdd 5 6 7 8 inr outl svss outr sgnd svdd thermal pad note: recommend connecting the thermal pad to the ground for excellent power dissipation.
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